From gharmon at idworld.net  Mon Feb  3 10:51:05 2020
From: gharmon at idworld.net (Gary H. Harmon, Jr.)
Date: Mon, 3 Feb 2020 09:51:05 -0600
Subject: [Test-Equipment] Tube Socket Adapter Needed
Message-ID: <004d01d5daa9$be37bdf0$3aa739d0$@idworld.net>

I have two complete MX-1258/U Tube Socket Adapter Kits in their nifty metal
boxes.  Both are complete with their manuals BUT one has a mismatched
U-105/U 9 pin miniature tube socket adapter.  Might anyone have an extra
proper original needing a new home with the rest of their family?

 

73,

 

Gary H. Harmon, Jr. - K5JWK - HAM Radio, HEATHKIT, and ATARI Archaeologist

6003 Archwood

San Antonio, TX 78239-1504

(210) 657-1549 <home>

(210) 884-6926 <cell and text>

(210) 657-1549 <FAX with prior notification>

gharmon at idworld.net

 

"Retirement = Every day is a Saturday except Sunday"

"Real radios glow in the dark"

"Too many projects, not enough time"

 

http://www.grissomroadcoc.org

 


From cosmophone at yahoo.com  Tue Feb  4 20:59:16 2020
From: cosmophone at yahoo.com (Brian Harris)
Date: Tue, 4 Feb 2020 19:59:16 -0600
Subject: [Test-Equipment] Question about VTVM calibration
References: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35.ref@yahoo.com>
Message-ID: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>


I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I have no idea how accurate they are. I?d like to obtain some reasonable voltage references with which I can calibrate them or, alternatively, a service which can do them for me. I?m in Fayetteville Arkansas. What say ye?

Brian WA5UEK 
Sent from my iPhone

From rwicker1 at verizon.net  Tue Feb  4 21:55:16 2020
From: rwicker1 at verizon.net (RONALD WICKER)
Date: Tue, 4 Feb 2020 20:55:16 -0600
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
References: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
Message-ID: <ABCEEF16-876D-4582-9F57-32E0FD144E20@verizon.net>

Both manuals are downloadable on the internet.  Both are very good meters.

Sent from my iPad

> On Feb 4, 2020, at 7:59 PM, Brian Harris via Test-Equipment <test-equipment at mailman.qth.net> wrote:
> 
> ?
> I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I have no idea how accurate they are. I?d like to obtain some reasonable voltage references with which I can calibrate them or, alternatively, a service which can do them for me. I?m in Fayetteville Arkansas. What say ye?
> 
> Brian WA5UEK 
> Sent from my iPhone
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html


From K2LRC at k2lrc.com  Tue Feb  4 23:06:41 2020
From: K2LRC at k2lrc.com (Peter Wittenberg Sr)
Date: Wed, 5 Feb 2020 04:06:41 +0000
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
References: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35.ref@yahoo.com>,
	<90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
Message-ID: <9913E8E7-EEC4-4B4F-A31C-98E0610F343D@k2lrc.com>

Brian, on DC use FRESH batteries.  1.5 V read around 1.6V

-73- Peter K2LRC
www.k2lrc.com
COLLINS REBUILDERS LLc.
916-663-9744 shop
443-994-1438 cell

Sent from my iPad

On Feb 4, 2020, at 17:59, Brian Harris via Test-Equipment <test-equipment at mailman.qth.net> wrote:

?
I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I have no idea how accurate they are. I?d like to obtain some reasonable voltage references with which I can calibrate them or, alternatively, a service which can do them for me. I?m in Fayetteville Arkansas. What say ye?

Brian WA5UEK
Sent from my iPhone
______________________________________________________________
Test-Equipment mailing list
Home: http://mailman.qth.net/mailman/listinfo/test-equipment
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Test-Equipment at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

From blairbatty at gmail.com  Wed Feb  5 08:21:42 2020
From: blairbatty at gmail.com (Blair Batty)
Date: Wed, 5 Feb 2020 08:21:42 -0500
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
References: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35.ref@yahoo.com>
	<90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
Message-ID: <CAD7jcWT3-XQBYbVLFwndVvO-VJ75dQbNgrvxez7j7Pc0Gc4Q0A@mail.gmail.com>

https://www.ebay.ca/itm/High-precision-AD584L-voltage-reference-module-reference-voltage-sourceL/171782257863?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649


On Tue, Feb 4, 2020 at 8:59 PM Brian Harris via Test-Equipment <
test-equipment at mailman.qth.net> wrote:

>
> I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I have no
> idea how accurate they are. I?d like to obtain some reasonable voltage
> references with which I can calibrate them or, alternatively, a service
> which can do them for me. I?m in Fayetteville Arkansas. What say ye?
>
> Brian WA5UEK
> Sent from my iPhone
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From djed1 at aol.com  Wed Feb  5 10:46:39 2020
From: djed1 at aol.com (djed1 at aol.com)
Date: Wed, 5 Feb 2020 15:46:39 +0000 (UTC)
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <CAD7jcWT3-XQBYbVLFwndVvO-VJ75dQbNgrvxez7j7Pc0Gc4Q0A@mail.gmail.com>
References: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35.ref@yahoo.com>
	<90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
	<CAD7jcWT3-XQBYbVLFwndVvO-VJ75dQbNgrvxez7j7Pc0Gc4Q0A@mail.gmail.com>
Message-ID: <1997172396.901880.1580917599044@mail.yahoo.com>

Calibrating our test equipment can be a real "rabbit hole" experience.? However, most exotic approaches are more suitable for voltmeters whose nominal accuracy is measured in parts per million.? For run of the mill meters like my HP 410C I bought a more expensive eBay calibrator (similar to that shown) which not only provides a reference DC voltage but also an accurate RMS AC voltage, as well as current and resistance standards.? This still leaves some room for error since I have no precision high voltage calibrator or RF voltage calibrator. ?You can accumulate other calibrators and/or precision voltmeters which could be used to check the 410B, but each will have uncertain cal themselves.? So I find myself with several voltmeters which kinda agree with each other, but offer no certainty.? Fortunately, the spec on my VTVMs is only a few percent, so I can be pretty sure my 410C meets specs when compared to my .03% voltmeter, even if the .03% voltmeter may be out of cal.Have funEd W2EMN

-----Original Message-----
From: Blair Batty <blairbatty at gmail.com>
To: Brian Harris <cosmophone at yahoo.com>; Discussion of Electronic Test Equipment <test-equipment at mailman.qth.net>
Sent: Wed, Feb 5, 2020 8:22 am
Subject: Re: [Test-Equipment] Question about VTVM calibration

https://www.ebay.ca/itm/High-precision-AD584L-voltage-reference-module-reference-voltage-sourceL/171782257863?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649


On Tue, Feb 4, 2020 at 8:59 PM Brian Harris via Test-Equipment <
test-equipment at mailman.qth.net> wrote:

>
> I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I have no
> idea how accurate they are. I?d like to obtain some reasonable voltage
> references with which I can calibrate them or, alternatively, a service
> which can do them for me. I?m in Fayetteville Arkansas. What say ye?
>
> Brian WA5UEK
> Sent from my iPhone
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
Test-Equipment mailing list
Home: http://mailman.qth.net/mailman/listinfo/test-equipment
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Test-Equipment at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

From n4buq at knology.net  Wed Feb  5 10:54:43 2020
From: n4buq at knology.net (Barry)
Date: Wed, 5 Feb 2020 10:54:43 -0500 (EST)
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <1997172396.901880.1580917599044@mail.yahoo.com>
References: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35.ref@yahoo.com>
	<90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
	<CAD7jcWT3-XQBYbVLFwndVvO-VJ75dQbNgrvxez7j7Pc0Gc4Q0A@mail.gmail.com>
	<1997172396.901880.1580917599044@mail.yahoo.com>
Message-ID: <659521198.1185628.1580918083953.JavaMail.zimbra@knology.net>

... and I thought I was the only one who did that sort of thing.  ;)

I do have an older Fluke calibrator (760A) which is "most likely close enough" to calibrate my 410B and 410C.  After all, I think the last time I checked it against my Fluke DMM, it was "pretty close" so at least I have something that will run these old meters through their paces.  I only wish I could afford to have at least some of my test equipment officially calibrated but it's just a hobby so...

Thanks,
Barry - N4BUQ

----- Original Message -----
> From: "Ed via Test-Equipment" <test-equipment at mailman.qth.net>
> To: test-equipment at mailman.qth.net, cosmophone at yahoo.com
> Sent: Wednesday, February 5, 2020 9:46:39 AM
> Subject: Re: [Test-Equipment] Question about VTVM calibration
> 
> Calibrating our test equipment can be a real "rabbit hole" experience.
> ? However, most exotic approaches are more suitable for voltmeters whose
> nominal accuracy is measured in parts per million.? For run of the mill
> meters like my HP 410C I bought a more expensive eBay calibrator (similar to
> that shown) which not only provides a reference DC voltage but also an
> accurate RMS AC voltage, as well as current and resistance standards.? This
> still leaves some room for error since I have no precision high voltage
> calibrator or RF voltage calibrator. ?You can accumulate other calibrators
> and/or precision voltmeters which could be used to check the 410B, but each
> will have uncertain cal themselves.? So I find myself with several
> voltmeters which kinda agree with each other, but offer no certainty.
> ? Fortunately, the spec on my VTVMs is only a few percent, so I can be pretty
> sure my 410C meets specs when compared to my .03% voltmeter, even if the
> .03% voltmeter may be out of cal.Have funEd W2EMN
> 
> -----Original Message-----
> From: Blair Batty <blairbatty at gmail.com>
> To: Brian Harris <cosmophone at yahoo.com>; Discussion of Electronic Test
> Equipment <test-equipment at mailman.qth.net>
> Sent: Wed, Feb 5, 2020 8:22 am
> Subject: Re: [Test-Equipment] Question about VTVM calibration
> 
> https://www.ebay.ca/itm/High-precision-AD584L-voltage-reference-module-reference-voltage-sourceL/171782257863?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
> 
> 
> On Tue, Feb 4, 2020 at 8:59 PM Brian Harris via Test-Equipment <
> test-equipment at mailman.qth.net> wrote:
> 
> >
> > I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I have no
> > idea how accurate they are. I?d like to obtain some reasonable voltage
> > references with which I can calibrate them or, alternatively, a service
> > which can do them for me. I?m in Fayetteville Arkansas. What say ye?
> >
> > Brian WA5UEK
> > Sent from my iPhone
> > ______________________________________________________________
> > Test-Equipment mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Test-Equipment at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From blairbatty at gmail.com  Wed Feb  5 11:23:42 2020
From: blairbatty at gmail.com (Blair Batty)
Date: Wed, 5 Feb 2020 11:23:42 -0500
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <CAD7jcWT3-XQBYbVLFwndVvO-VJ75dQbNgrvxez7j7Pc0Gc4Q0A@mail.gmail.com>
References: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35.ref@yahoo.com>
	<90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
	<CAD7jcWT3-XQBYbVLFwndVvO-VJ75dQbNgrvxez7j7Pc0Gc4Q0A@mail.gmail.com>
Message-ID: <CAD7jcWQ-wGLzHgY-e0nmEbR+ASLT=A3FiN+Z+e+QQTA2AyJQKA@mail.gmail.com>

They're only $10. Everyone with test equipment should have one!
/b

On Wed, Feb 5, 2020 at 8:21 AM Blair Batty <blairbatty at gmail.com> wrote:

>
> https://www.ebay.ca/itm/High-precision-AD584L-voltage-reference-module-reference-voltage-sourceL/171782257863?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
>
>
> On Tue, Feb 4, 2020 at 8:59 PM Brian Harris via Test-Equipment <
> test-equipment at mailman.qth.net> wrote:
>
>>
>> I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I have
>> no idea how accurate they are. I?d like to obtain some reasonable voltage
>> references with which I can calibrate them or, alternatively, a service
>> which can do them for me. I?m in Fayetteville Arkansas. What say ye?
>>
>> Brian WA5UEK
>> Sent from my iPhone
>> ______________________________________________________________
>> Test-Equipment mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Test-Equipment at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
>

From n4buq at knology.net  Wed Feb  5 11:48:17 2020
From: n4buq at knology.net (Barry)
Date: Wed, 5 Feb 2020 11:48:17 -0500 (EST)
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <CAD7jcWT3-XQBYbVLFwndVvO-VJ75dQbNgrvxez7j7Pc0Gc4Q0A@mail.gmail.com>
References: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35.ref@yahoo.com>
	<90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
	<CAD7jcWT3-XQBYbVLFwndVvO-VJ75dQbNgrvxez7j7Pc0Gc4Q0A@mail.gmail.com>
Message-ID: <1284435509.1219346.1580921297534.JavaMail.zimbra@knology.net>

Hi Brian,

What kind of battery do you use (or do you power it from a DC supply?)

Thanks,
Barry - N4BUQ

----- Original Message -----
> From: "Blair Batty" <blairbatty at gmail.com>
> To: "Brian Harris" <cosmophone at yahoo.com>, "Discussion of Electronic Test Equipment" <test-equipment at mailman.qth.net>
> Sent: Wednesday, February 5, 2020 7:21:42 AM
> Subject: Re: [Test-Equipment] Question about VTVM calibration
> 
> https://www.ebay.ca/itm/High-precision-AD584L-voltage-reference-module-reference-voltage-sourceL/171782257863?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
> 
> 
> On Tue, Feb 4, 2020 at 8:59 PM Brian Harris via Test-Equipment <
> test-equipment at mailman.qth.net> wrote:
> 
> >
> > I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I have no
> > idea how accurate they are. I?d like to obtain some reasonable voltage
> > references with which I can calibrate them or, alternatively, a service
> > which can do them for me. I?m in Fayetteville Arkansas. What say ye?
> >
> > Brian WA5UEK
> > Sent from my iPhone
> > ______________________________________________________________
> > Test-Equipment mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Test-Equipment at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From blairbatty at gmail.com  Wed Feb  5 11:59:10 2020
From: blairbatty at gmail.com (Blair Batty)
Date: Wed, 5 Feb 2020 11:59:10 -0500
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <1284435509.1219346.1580921297534.JavaMail.zimbra@knology.net>
References: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35.ref@yahoo.com>
	<90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
	<CAD7jcWT3-XQBYbVLFwndVvO-VJ75dQbNgrvxez7j7Pc0Gc4Q0A@mail.gmail.com>
	<1284435509.1219346.1580921297534.JavaMail.zimbra@knology.net>
Message-ID: <CAD7jcWTH=VixPbF-8oKv2dgTVuFSb3tF1xgzDpZf9uMhJMArRA@mail.gmail.com>

The battery is very expensive, so I just power it from my Rigol power
supply.
/b

On Wed, Feb 5, 2020 at 11:49 AM Barry <n4buq at knology.net> wrote:

> Hi Brian,
>
> What kind of battery do you use (or do you power it from a DC supply?)
>
> Thanks,
> Barry - N4BUQ
>
> ----- Original Message -----
> > From: "Blair Batty" <blairbatty at gmail.com>
> > To: "Brian Harris" <cosmophone at yahoo.com>, "Discussion of Electronic
> Test Equipment" <test-equipment at mailman.qth.net>
> > Sent: Wednesday, February 5, 2020 7:21:42 AM
> > Subject: Re: [Test-Equipment] Question about VTVM calibration
> >
> >
> https://www.ebay.ca/itm/High-precision-AD584L-voltage-reference-module-reference-voltage-sourceL/171782257863?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
> >
> >
> > On Tue, Feb 4, 2020 at 8:59 PM Brian Harris via Test-Equipment <
> > test-equipment at mailman.qth.net> wrote:
> >
> > >
> > > I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I
> have no
> > > idea how accurate they are. I?d like to obtain some reasonable voltage
> > > references with which I can calibrate them or, alternatively, a service
> > > which can do them for me. I?m in Fayetteville Arkansas. What say ye?
> > >
> > > Brian WA5UEK
> > > Sent from my iPhone
> > > ______________________________________________________________
> > > Test-Equipment mailing list
> > > Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> > > Help: http://mailman.qth.net/mmfaq.htm
> > > Post: mailto:Test-Equipment at mailman.qth.net
> > >
> > > This list hosted by: http://www.qsl.net
> > > Please help support this email list: http://www.qsl.net/donate.html
> > ______________________________________________________________
> > Test-Equipment mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Test-Equipment at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From n4buq at knology.net  Wed Feb  5 12:02:20 2020
From: n4buq at knology.net (Barry)
Date: Wed, 5 Feb 2020 12:02:20 -0500 (EST)
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <CAD7jcWTH=VixPbF-8oKv2dgTVuFSb3tF1xgzDpZf9uMhJMArRA@mail.gmail.com>
References: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35.ref@yahoo.com>
	<90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
	<CAD7jcWT3-XQBYbVLFwndVvO-VJ75dQbNgrvxez7j7Pc0Gc4Q0A@mail.gmail.com>
	<1284435509.1219346.1580921297534.JavaMail.zimbra@knology.net>
	<CAD7jcWTH=VixPbF-8oKv2dgTVuFSb3tF1xgzDpZf9uMhJMArRA@mail.gmail.com>
Message-ID: <861941290.1226879.1580922140775.JavaMail.zimbra@knology.net>

That's what I was finding as well.  The battery costs more than the calibrator.

Thanks,
Barry - N4BUQ

----- Original Message -----
> From: "Blair Batty" <blairbatty at gmail.com>
> To: "Discussion of Electronic Test Equipment" <test-equipment at mailman.qth.net>
> Sent: Wednesday, February 5, 2020 10:59:10 AM
> Subject: Re: [Test-Equipment] Question about VTVM calibration
> 
> The battery is very expensive, so I just power it from my Rigol power
> supply.
> /b
> 
> On Wed, Feb 5, 2020 at 11:49 AM Barry <n4buq at knology.net> wrote:
> 
> > Hi Brian,
> >
> > What kind of battery do you use (or do you power it from a DC supply?)
> >
> > Thanks,
> > Barry - N4BUQ
> >
> > ----- Original Message -----
> > > From: "Blair Batty" <blairbatty at gmail.com>
> > > To: "Brian Harris" <cosmophone at yahoo.com>, "Discussion of Electronic
> > Test Equipment" <test-equipment at mailman.qth.net>
> > > Sent: Wednesday, February 5, 2020 7:21:42 AM
> > > Subject: Re: [Test-Equipment] Question about VTVM calibration
> > >
> > >
> > https://www.ebay.ca/itm/High-precision-AD584L-voltage-reference-module-reference-voltage-sourceL/171782257863?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
> > >
> > >
> > > On Tue, Feb 4, 2020 at 8:59 PM Brian Harris via Test-Equipment <
> > > test-equipment at mailman.qth.net> wrote:
> > >
> > > >
> > > > I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I
> > have no
> > > > idea how accurate they are. I?d like to obtain some reasonable voltage
> > > > references with which I can calibrate them or, alternatively, a service
> > > > which can do them for me. I?m in Fayetteville Arkansas. What say ye?
> > > >
> > > > Brian WA5UEK
> > > > Sent from my iPhone
> > > > ______________________________________________________________
> > > > Test-Equipment mailing list
> > > > Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> > > > Help: http://mailman.qth.net/mmfaq.htm
> > > > Post: mailto:Test-Equipment at mailman.qth.net
> > > >
> > > > This list hosted by: http://www.qsl.net
> > > > Please help support this email list: http://www.qsl.net/donate.html
> > > ______________________________________________________________
> > > Test-Equipment mailing list
> > > Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> > > Help: http://mailman.qth.net/mmfaq.htm
> > > Post: mailto:Test-Equipment at mailman.qth.net
> > >
> > > This list hosted by: http://www.qsl.net
> > > Please help support this email list: http://www.qsl.net/donate.html
> > ______________________________________________________________
> > Test-Equipment mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Test-Equipment at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From blairbatty at gmail.com  Wed Feb  5 12:15:11 2020
From: blairbatty at gmail.com (Blair Batty)
Date: Wed, 5 Feb 2020 12:15:11 -0500
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <861941290.1226879.1580922140775.JavaMail.zimbra@knology.net>
References: <90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35.ref@yahoo.com>
	<90A8B648-2B49-4CE0-A0DC-44F8DB0EDA35@yahoo.com>
	<CAD7jcWT3-XQBYbVLFwndVvO-VJ75dQbNgrvxez7j7Pc0Gc4Q0A@mail.gmail.com>
	<1284435509.1219346.1580921297534.JavaMail.zimbra@knology.net>
	<CAD7jcWTH=VixPbF-8oKv2dgTVuFSb3tF1xgzDpZf9uMhJMArRA@mail.gmail.com>
	<861941290.1226879.1580922140775.JavaMail.zimbra@knology.net>
Message-ID: <CAD7jcWRSjKPj9HdAWUE0uyJ8vsDyMoL03ehKFHRibGufPCNsSg@mail.gmail.com>

The voltage only has to be higher than the calibrated output. If all you
want is 7.500vdc and lower, a common 9v transistor battery will do.
/b

On Wed, Feb 5, 2020 at 12:04 PM Barry <n4buq at knology.net> wrote:

> That's what I was finding as well.  The battery costs more than the
> calibrator.
>
> Thanks,
> Barry - N4BUQ
>
> ----- Original Message -----
> > From: "Blair Batty" <blairbatty at gmail.com>
> > To: "Discussion of Electronic Test Equipment" <
> test-equipment at mailman.qth.net>
> > Sent: Wednesday, February 5, 2020 10:59:10 AM
> > Subject: Re: [Test-Equipment] Question about VTVM calibration
> >
> > The battery is very expensive, so I just power it from my Rigol power
> > supply.
> > /b
> >
> > On Wed, Feb 5, 2020 at 11:49 AM Barry <n4buq at knology.net> wrote:
> >
> > > Hi Brian,
> > >
> > > What kind of battery do you use (or do you power it from a DC supply?)
> > >
> > > Thanks,
> > > Barry - N4BUQ
> > >
> > > ----- Original Message -----
> > > > From: "Blair Batty" <blairbatty at gmail.com>
> > > > To: "Brian Harris" <cosmophone at yahoo.com>, "Discussion of Electronic
> > > Test Equipment" <test-equipment at mailman.qth.net>
> > > > Sent: Wednesday, February 5, 2020 7:21:42 AM
> > > > Subject: Re: [Test-Equipment] Question about VTVM calibration
> > > >
> > > >
> > >
> https://www.ebay.ca/itm/High-precision-AD584L-voltage-reference-module-reference-voltage-sourceL/171782257863?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
> > > >
> > > >
> > > > On Tue, Feb 4, 2020 at 8:59 PM Brian Harris via Test-Equipment <
> > > > test-equipment at mailman.qth.net> wrote:
> > > >
> > > > >
> > > > > I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I
> > > have no
> > > > > idea how accurate they are. I?d like to obtain some reasonable
> voltage
> > > > > references with which I can calibrate them or, alternatively, a
> service
> > > > > which can do them for me. I?m in Fayetteville Arkansas. What say
> ye?
> > > > >
> > > > > Brian WA5UEK
> > > > > Sent from my iPhone
> > > > > ______________________________________________________________
> > > > > Test-Equipment mailing list
> > > > > Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> > > > > Help: http://mailman.qth.net/mmfaq.htm
> > > > > Post: mailto:Test-Equipment at mailman.qth.net
> > > > >
> > > > > This list hosted by: http://www.qsl.net
> > > > > Please help support this email list:
> http://www.qsl.net/donate.html
> > > > ______________________________________________________________
> > > > Test-Equipment mailing list
> > > > Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> > > > Help: http://mailman.qth.net/mmfaq.htm
> > > > Post: mailto:Test-Equipment at mailman.qth.net
> > > >
> > > > This list hosted by: http://www.qsl.net
> > > > Please help support this email list: http://www.qsl.net/donate.html
> > > ______________________________________________________________
> > > Test-Equipment mailing list
> > > Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> > > Help: http://mailman.qth.net/mmfaq.htm
> > > Post: mailto:Test-Equipment at mailman.qth.net
> > >
> > > This list hosted by: http://www.qsl.net
> > > Please help support this email list: http://www.qsl.net/donate.html
> > ______________________________________________________________
> > Test-Equipment mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Test-Equipment at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From cosmophone at yahoo.com  Wed Feb  5 22:17:14 2020
From: cosmophone at yahoo.com (Brian Harris)
Date: Wed, 5 Feb 2020 21:17:14 -0600
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <CAD7jcWRSjKPj9HdAWUE0uyJ8vsDyMoL03ehKFHRibGufPCNsSg@mail.gmail.com>
References: <CAD7jcWRSjKPj9HdAWUE0uyJ8vsDyMoL03ehKFHRibGufPCNsSg@mail.gmail.com>
Message-ID: <810EFE79-9308-426A-A43D-391D24DB02DB@yahoo.com>

The calibration procedure for the ME-26 calls for 1VDC and 1,3,10,30,100,300 VAC sources. I don?t know about the HP procedure. 

Sent from my iPhone

> On Feb 5, 2020, at 11:16 AM, Blair Batty <blairbatty at gmail.com> wrote:
> 
> ?The voltage only has to be higher than the calibrated output. If all you
> want is 7.500vdc and lower, a common 9v transistor battery will do.
> /b
> 
>> On Wed, Feb 5, 2020 at 12:04 PM Barry <n4buq at knology.net> wrote:
>> 
>> That's what I was finding as well.  The battery costs more than the
>> calibrator.
>> 
>> Thanks,
>> Barry - N4BUQ
>> 
>> ----- Original Message -----
>>> From: "Blair Batty" <blairbatty at gmail.com>
>>> To: "Discussion of Electronic Test Equipment" <
>> test-equipment at mailman.qth.net>
>>> Sent: Wednesday, February 5, 2020 10:59:10 AM
>>> Subject: Re: [Test-Equipment] Question about VTVM calibration
>>> 
>>> The battery is very expensive, so I just power it from my Rigol power
>>> supply.
>>> /b
>>> 
>>>> On Wed, Feb 5, 2020 at 11:49 AM Barry <n4buq at knology.net> wrote:
>>> 
>>>> Hi Brian,
>>>> 
>>>> What kind of battery do you use (or do you power it from a DC supply?)
>>>> 
>>>> Thanks,
>>>> Barry - N4BUQ
>>>> 
>>>> ----- Original Message -----
>>>>> From: "Blair Batty" <blairbatty at gmail.com>
>>>>> To: "Brian Harris" <cosmophone at yahoo.com>, "Discussion of Electronic
>>>> Test Equipment" <test-equipment at mailman.qth.net>
>>>>> Sent: Wednesday, February 5, 2020 7:21:42 AM
>>>>> Subject: Re: [Test-Equipment] Question about VTVM calibration
>>>>> 
>>>>> 
>>>> 
>> https://www.ebay.ca/itm/High-precision-AD584L-voltage-reference-module-reference-voltage-sourceL/171782257863?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
>>>>> 
>>>>> 
>>>>> On Tue, Feb 4, 2020 at 8:59 PM Brian Harris via Test-Equipment <
>>>>> test-equipment at mailman.qth.net> wrote:
>>>>> 
>>>>>> 
>>>>>> I have a couple of excellent VTVMs, an ME-26D and an HP-410B but I
>>>> have no
>>>>>> idea how accurate they are. I?d like to obtain some reasonable
>> voltage
>>>>>> references with which I can calibrate them or, alternatively, a
>> service
>>>>>> which can do them for me. I?m in Fayetteville Arkansas. What say
>> ye?
>>>>>> 
>>>>>> Brian WA5UEK
>>>>>> Sent from my iPhone
>>>>>> ______________________________________________________________
>>>>>> Test-Equipment mailing list
>>>>>> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
>>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>>> Post: mailto:Test-Equipment at mailman.qth.net
>>>>>> 
>>>>>> This list hosted by: http://www.qsl.net
>>>>>> Please help support this email list:
>> http://www.qsl.net/donate.html
>>>>> ______________________________________________________________
>>>>> Test-Equipment mailing list
>>>>> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>> Post: mailto:Test-Equipment at mailman.qth.net
>>>>> 
>>>>> This list hosted by: http://www.qsl.net
>>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>> ______________________________________________________________
>>>> Test-Equipment mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Test-Equipment at mailman.qth.net
>>>> 
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>> ______________________________________________________________
>>> Test-Equipment mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Test-Equipment at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>> ______________________________________________________________
>> Test-Equipment mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Test-Equipment at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html


From radiotest at plymouthcolony.net  Thu Feb  6 12:28:36 2020
From: radiotest at plymouthcolony.net (Dale H. Cook)
Date: Thu, 6 Feb 2020 12:28:36 -0500
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <810EFE79-9308-426A-A43D-391D24DB02DB@yahoo.com>
References: <CAD7jcWRSjKPj9HdAWUE0uyJ8vsDyMoL03ehKFHRibGufPCNsSg@mail.gmail.com>
	<810EFE79-9308-426A-A43D-391D24DB02DB@yahoo.com>
Message-ID: <e3957c08-1e7f-2d87-d736-cdb0675d54c0@plymouthcolony.net>

On 2/5/2020 10:17 PM, Brian Harris wrote:

The HP 400D/H/L VTVMs were calibrated by factory and field techs with 
HP's own VTVM calibration system:

https://plymouthcolony.net/starcity/radios/pages/hp-cal.html

I sold the last of my 4xx-series VTVMs a year ago, and my cal system is 
going to the Museum of Radio and Technology in Huntington WV on a future 
trip.
-- 
Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
https://plymouthcolony.net/starcity/radios/

From cosmophone at yahoo.com  Thu Feb  6 13:28:05 2020
From: cosmophone at yahoo.com (Brian Harris)
Date: Thu, 6 Feb 2020 12:28:05 -0600
Subject: [Test-Equipment] Question about VTVM calibration
In-Reply-To: <e3957c08-1e7f-2d87-d736-cdb0675d54c0@plymouthcolony.net>
References: <e3957c08-1e7f-2d87-d736-cdb0675d54c0@plymouthcolony.net>
Message-ID: <657DFE44-0C9B-4E03-8CF3-7C4E02B335E7@yahoo.com>

Thank you for the information. Nice of you to donate the test system. 


Sent from my iPhone

> On Feb 6, 2020, at 11:29 AM, Dale H. Cook <radiotest at plymouthcolony.net> wrote:
> 
> ?On 2/5/2020 10:17 PM, Brian Harris wrote:
> 
> The HP 400D/H/L VTVMs were calibrated by factory and field techs with HP's own VTVM calibration system:
> 
> https://plymouthcolony.net/starcity/radios/pages/hp-cal.html
> 
> I sold the last of my 4xx-series VTVMs a year ago, and my cal system is going to the Museum of Radio and Technology in Huntington WV on a future trip.
> -- 
> Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
> https://plymouthcolony.net/starcity/radios/
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html


From cosmophone at yahoo.com  Sun Feb  9 21:12:39 2020
From: cosmophone at yahoo.com (Brian Harris)
Date: Sun, 9 Feb 2020 20:12:39 -0600
Subject: [Test-Equipment] HP8920B
References: <D52DFC4C-BE01-4D39-84D7-C4FA73D994B3.ref@yahoo.com>
Message-ID: <D52DFC4C-BE01-4D39-84D7-C4FA73D994B3@yahoo.com>


I am the proud owner of an HP8920B Test Set to which I would very much like to add the Spectrum Analyzer option (102). Does anyone have one they would like to part with?

Thank you,

Brian Harris WA5UEK 
Sent from my iPhone

From yonglee at yonsei.ac.kr  Sun Feb  9 21:43:58 2020
From: yonglee at yonsei.ac.kr (Yongsurk Lee, HL1FB)
Date: Mon, 10 Feb 2020 11:43:58 +0900
Subject: [Test-Equipment] HP8920B
In-Reply-To: <D52DFC4C-BE01-4D39-84D7-C4FA73D994B3@yahoo.com>
References: <D52DFC4C-BE01-4D39-84D7-C4FA73D994B3.ref@yahoo.com>
	<D52DFC4C-BE01-4D39-84D7-C4FA73D994B3@yahoo.com>
Message-ID: <CAAwfMAhu50tgmfmJJdU0WKZCO2jtjdBSX7wQJRJEsdNF2=dmhg@mail.gmail.com>

Is that the same one used in  HP E8285A ?

2020? 2? 10? (?) ?? 11:13, Brian Harris via Test-Equipment <
test-equipment at mailman.qth.net>?? ??:

>
> I am the proud owner of an HP8920B Test Set to which I would very much
> like to add the Spectrum Analyzer option (102). Does anyone have one they
> would like to part with?
>
> Thank you,
>
> Brian Harris WA5UEK
> Sent from my iPhone
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

From w4ej15 at gmail.com  Mon Feb 10 09:08:01 2020
From: w4ej15 at gmail.com (Dave Wood)
Date: Mon, 10 Feb 2020 09:08:01 -0500
Subject: [Test-Equipment] HP8920B
In-Reply-To: <CAAwfMAhu50tgmfmJJdU0WKZCO2jtjdBSX7wQJRJEsdNF2=dmhg@mail.gmail.com>
References: <D52DFC4C-BE01-4D39-84D7-C4FA73D994B3.ref@yahoo.com>
	<D52DFC4C-BE01-4D39-84D7-C4FA73D994B3@yahoo.com>
	<CAAwfMAhu50tgmfmJJdU0WKZCO2jtjdBSX7wQJRJEsdNF2=dmhg@mail.gmail.com>
Message-ID: <CAJGO4aN3ZY7C=0WaHEazOuNHUaQgtLu34GWMfj1QcZ-mie25dw@mail.gmail.com>

Brian, try Rick at Amtronix.com   73  Dave

On Sun, Feb 9, 2020 at 9:45 PM Yongsurk Lee, HL1FB <yonglee at yonsei.ac.kr>
wrote:

> Is that the same one used in  HP E8285A ?
>
> 2020? 2? 10? (?) ?? 11:13, Brian Harris via Test-Equipment <
> test-equipment at mailman.qth.net>?? ??:
>
> >
> > I am the proud owner of an HP8920B Test Set to which I would very much
> > like to add the Spectrum Analyzer option (102). Does anyone have one they
> > would like to part with?
> >
> > Thank you,
> >
> > Brian Harris WA5UEK
> > Sent from my iPhone
> > ______________________________________________________________
> > Test-Equipment mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Test-Equipment at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> >
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
>
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> Please help support this email list: http://www.qsl.net/donate.html

