[R-390] John's R 390A article MORE??
Glenn Scott
wa4aos at aol.com
Wed May 15 05:31:10 EDT 2013
I enjoyed the article that John posted regarding R 390A's used during the early era of Satellites.
Technology efforts now days are often Global events with many Countries contributing to the projects.
Just consider how jumbo jets are built by a conglomeration of different Countries and disciplines now.
However, there was a time not long ago that most of us remember well. Where US companies were doing amazing
R&D and manufacturing technology that is still a marvel of engineering and scientific brilliance today.
That got me wondering how many other articles/pics or other postings of R 389, R390, R 390A, R391, R392 and R648 receivers
might be tucked away in the files of readers of this list. Surely, there must be other application articles out there
beyond what we find on the Internet.
I believe other readers of this list would like to see those kinds of articles as well.
Perhaps a consortium of articles/pics could be compiled into a Y2K type format. A dedicated, actual applications of these receivers
that we all covet!!! Even old photo's of Communication rooms on ships and elsewhere, Spook photos, if they exist, Photo's with R392 in the back of jeeps.
Pics of some of the manufacturing sites of these receivers. Does anyone know if any of these receivers made into submarines? I suspect due to the weight, not many or any made it into aircraft applications other than the somewhat rare R648.
We have covered the technical side of things well but the application side should be important to archive too.
Any thoughts???
73,
Glenn WA4AOS
DSM Labs (dot com)
-----Original Message-----
From: r-390-request <r-390-request at mailman.qth.net>
To: r-390 <r-390 at mailman.qth.net>
Sent: Tue, May 14, 2013 9:30 pm
Subject: R-390 Digest, Vol 109, Issue 18
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Today's Topics:
1. Re: 17 MHz Crystal (Gordon)
2. Re: 17 MHz Crystal (Barry)
3. Re: 17 MHz Crystal (Barry)
4. Re: Caps (John Flood)
5. Re: 17 MHz Crystal (Bob Camp)
6. Re: 17 MHz Crystal (Bob Camp)
7. Re: 17 MHz Crystal (Bob Camp)
8. Re: 17 MHz Crystal (Barry)
----------------------------------------------------------------------
Message: 1
Date: Tue, 14 May 2013 10:32:46 -0700
From: Gordon <gordon at n6wk.com>
To: r390 reflector <r-390 at mailman.qth.net>
Subject: Re: [R-390] 17 MHz Crystal
Message-ID: <5192753E.7050309 at n6wk.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Well, I took the crystal apart and found the problem.
http://www.n6wk.com/R-390A/17Mhz-Crystal.JPG
There is No repairing this one. LOL
Gordon
N6WK
On 5/14/2013 6:47 AM, Steve Hobensack wrote:
> Usually a bad crystal can be repaired. dismantle and remove the crystal. Soak
everything is soap and water. I have found that degreaser spray does not work as
good as soap and water. Use a toothbrush. rinse several times, final rinse use
distilled water. Also check electrical continuity between the pins and contact
plates. Dry the crystal with a clean cotton dish towel. Use a hair dryier on the
holder. It works most of the time for me. It even improves chirpy/lazy crystals.
> Steve N8YE
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
>
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> Please help support this email list: http://www.qsl.net/donate.html
>
------------------------------
Message: 2
Date: Tue, 14 May 2013 14:12:13 -0400 (EDT)
From: Barry <n4buq at knology.net>
To: r390 reflector <r-390 at mailman.qth.net>
Subject: Re: [R-390] 17 MHz Crystal
Message-ID:
<2035825643.28061242.1368555133862.JavaMail.root at md01.knology.synacor.com>
Content-Type: text/plain; charset=utf-8
Maybe you could have two 8.5Mc crystals? <grin>
BTW, I did have a 17.000 but a previous owner wrote 16.996 on it. It would
probably have worked, though.
73,
Barry - N4BUQ
> Well, I took the crystal apart and found the problem.
> http://www.n6wk.com/R-390A/17Mhz-Crystal.JPG
>
> There is No repairing this one. LOL
>
> Gordon
> N6WK
------------------------------
Message: 3
Date: Tue, 14 May 2013 15:51:43 -0400 (EDT)
From: Barry <n4buq at knology.net>
To: r390 reflector <r-390 at mailman.qth.net>
Subject: Re: [R-390] 17 MHz Crystal
Message-ID:
<846931412.28108986.1368561103984.JavaMail.root at md01.knology.synacor.com>
Content-Type: text/plain; charset=utf-8
Technically, I suppose that would be two 34MHz crystals...
Barry - N4BUQ
> Maybe you could have two 8.5Mc crystals? <grin>
>
> BTW, I did have a 17.000 but a previous owner wrote 16.996 on it. It
> would probably have worked, though.
>
> 73,
> Barry - N4BUQ
------------------------------
Message: 4
Date: Tue, 14 May 2013 14:25:13 -0700 (PDT)
From: John Flood <kb1fqg at yahoo.com>
To: "r-390 at mailman.qth.net" <r-390 at mailman.qth.net>
Subject: Re: [R-390] Caps
Message-ID:
<1368566713.35444.YahooMailNeo at web84504.mail.ne1.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Greetings,
I was cleaning out the computer and came across the following document.
?Interesting photos of a couple of R-390A's in a commo shelter. ?If I posted it
here ages ago and forgot, you are all welcome to make fun of me as I now begin
to enter the old buzzard stage in life.
http://www.nro.gov/history/csnr/programs/docs/prog-hist-03.pdf
John Flood
KB1FQG
------------------------------
Message: 5
Date: Tue, 14 May 2013 19:03:47 -0400
From: Bob Camp <ham at kb8tq.com>
To: Gordon <gordon at n6wk.com>
Cc: "R-390 at mailman.qth.net Group" <r-390 at mailman.qth.net>
Subject: Re: [R-390] 17 MHz Crystal
Message-ID: <479A9619-1DA0-42CA-8F8E-CC11756533A3 at kb8tq.com>
Content-Type: text/plain; charset=us-ascii
Hi
That's a late model crystal. Those mounts were not in use when the radio was
originally designed.
Bob
On May 14, 2013, at 1:32 PM, Gordon <gordon at n6wk.com> wrote:
> Well, I took the crystal apart and found the problem.
> http://www.n6wk.com/R-390A/17Mhz-Crystal.JPG
>
> There is No repairing this one. LOL
>
> Gordon
> N6WK
>
>
> On 5/14/2013 6:47 AM, Steve Hobensack wrote:
>> Usually a bad crystal can be repaired. dismantle and remove the crystal. Soak
everything is soap and water. I have found that degreaser spray does not work as
good as soap and water. Use a toothbrush. rinse several times, final rinse use
distilled water. Also check electrical continuity between the pins and contact
plates. Dry the crystal with a clean cotton dish towel. Use a hair dryier on the
holder. It works most of the time for me. It even improves chirpy/lazy crystals.
>> Steve N8YE
>> ______________________________________________________________
>> R-390 mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/r-390
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:R-390 at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
------------------------------
Message: 6
Date: Tue, 14 May 2013 20:06:58 -0400
From: Bob Camp <ham at kb8tq.com>
To: Steve Hobensack <stevehobensack at hotmail.com>
Cc: "R-390 at mailman.qth.net Group" <r-390 at mailman.qth.net>
Subject: Re: [R-390] 17 MHz Crystal
Message-ID: <0A38F610-A6AC-4005-B86B-77AB4C862A05 at kb8tq.com>
Content-Type: text/plain; charset=us-ascii
Hi
This may work for pressure holder / FT-243 type crystals. It's not a real good
idea on a solder sealed crystal like the 17 MHz part in the R-390A. The 17 MHz
blank is so thin that anything close to a toothbrush will destroy it.
Bob
On May 14, 2013, at 9:47 AM, Steve Hobensack <stevehobensack at hotmail.com> wrote:
> Usually a bad crystal can be repaired. dismantle and remove the crystal. Soak
everything is soap and water. I have found that degreaser spray does not work as
good as soap and water. Use a toothbrush. rinse several times, final rinse use
distilled water. Also check electrical continuity between the pins and contact
plates. Dry the crystal with a clean cotton dish towel. Use a hair dryier on the
holder. It works most of the time for me. It even improves chirpy/lazy crystals.
> Steve N8YE
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
------------------------------
Message: 7
Date: Tue, 14 May 2013 20:11:21 -0400
From: Bob Camp <ham at kb8tq.com>
To: Barry <n4buq at knology.net>
Cc: "R-390 at mailman.qth.net Group" <r-390 at mailman.qth.net>
Subject: Re: [R-390] 17 MHz Crystal
Message-ID: <CA1F0AEC-0843-4A8D-AB04-64B41A829264 at kb8tq.com>
Content-Type: text/plain; charset=us-ascii
Hi
Actually it's still two 17 MHz crystals. A jumper from the unconnected post to
the unconnected electrode likely would get it to oscillate (sort of). By the
way, I'm not in any way suggesting doing this.
Bob
On May 14, 2013, at 3:51 PM, Barry <n4buq at knology.net> wrote:
> Technically, I suppose that would be two 34MHz crystals...
>
> Barry - N4BUQ
>
>> Maybe you could have two 8.5Mc crystals? <grin>
>>
>> BTW, I did have a 17.000 but a previous owner wrote 16.996 on it. It
>> would probably have worked, though.
>>
>> 73,
>> Barry - N4BUQ
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
------------------------------
Message: 8
Date: Tue, 14 May 2013 19:50:42 -0500
From: Barry <n4buq at knology.net>
To: Bob Camp <ham at kb8tq.com>
Cc: "R-390 at mailman.qth.net Group" <r-390 at mailman.qth.net>
Subject: Re: [R-390] 17 MHz Crystal
Message-ID: <E1A2EBB7-27A3-45C9-B7B2-9AE5072AD5DB at knology.net>
Content-Type: text/plain; charset=us-ascii
So, it's the thickness that matters more than overall size, correct?
Barry - N4BUQ
Sent from my iPad
On May 14, 2013, at 7:11 PM, Bob Camp <ham at kb8tq.com> wrote:
> Hi
>
> Actually it's still two 17 MHz crystals. A jumper from the unconnected post to
the unconnected electrode likely would get it to oscillate (sort of). By the
way, I'm not in any way suggesting doing this.
>
> Bob
>
> On May 14, 2013, at 3:51 PM, Barry <n4buq at knology.net> wrote:
>
>> Technically, I suppose that would be two 34MHz crystals...
>>
>> Barry - N4BUQ
>>
>>> Maybe you could have two 8.5Mc crystals? <grin>
>>>
>>> BTW, I did have a 17.000 but a previous owner wrote 16.996 on it. It
>>> would probably have worked, though.
>>>
>>> 73,
>>> Barry - N4BUQ
>> ______________________________________________________________
>> R-390 mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/r-390
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:R-390 at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
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