From sean at fredcom.com  Sun May  1 12:09:05 2016
From: sean at fredcom.com (Sean McAdam)
Date: Sun, 1 May 2016 12:09:05 -0400
Subject: [FARC] Operators needed for March for Babies 5/1
In-Reply-To: <001201d19c41$00938450$01ba8cf0$@comcast.net>
References: <001201d19c41$00938450$01ba8cf0$@comcast.net>
Message-ID: <CA+Stcou0TYVUTH=4Ky85uyfBkZrzHms3W6p=EpRGZuyfhmm5_g@mail.gmail.com>

Is the MOD walk still happening?

Sean McAdam
301-591-4113
Linux Enthusiast / Ham Operator / Geek at Large

On Thu, Apr 21, 2016 at 10:45 PM, Jeff Fishman <ljfish1 at comcast.net> wrote:

> Frederick ARES has again been asked to provide communications support for
> the March of Dimes March for Babies on Sunday, May 1st, in Middletown
> Community Park. We need about 4-5 hams with 2M HT?s and we?ll use 146.580
> simplex. The walk starts at 1330, so we?ll meet at the starting area at
> 1300
> and deploy from there and the walk should last about 1 ? to 2 hours.
>
>
>
> As always, ARES membership is not required to participate. If you want to
> help but don?t have an HT, we?ll have one or two loaners available.
>
>
>
> Please let me know if you can help and if you have your own HT to use.
> Thanks.
>
>
>
> 73,
>
>
>
> Jeff Fishman KB3FIO
>
> Frederick ARES EC
>
> ljfish1 at comcast.net
>
> 240-285-6596
>
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC 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 ljfish1 at comcast.net  Sun May  1 12:17:45 2016
From: ljfish1 at comcast.net (Jeff Fishman)
Date: Sun, 1 May 2016 12:17:45 -0400
Subject: [FARC] Operators needed for March for Babies 5/1
In-Reply-To: <CA+Stcou0TYVUTH=4Ky85uyfBkZrzHms3W6p=EpRGZuyfhmm5_g@mail.gmail.com>
References: <001201d19c41$00938450$01ba8cf0$@comcast.net>
	<CA+Stcou0TYVUTH=4Ky85uyfBkZrzHms3W6p=EpRGZuyfhmm5_g@mail.gmail.com>
Message-ID: <000a01d1a3c4$feeda640$fcc8f2c0$@comcast.net>

Haven't heard anything. On my way to Middletown. Monitor the 06 repeater and I'll keep everyone informed.
Jeff

-----Original Message-----
From: FARC [mailto:farc-bounces at mailman.qth.net] On Behalf Of Sean McAdam
Sent: Sunday, May 1, 2016 12:09 PM
To: Frederick, Maryland ARC
Subject: Re: [FARC] Operators needed for March for Babies 5/1

Is the MOD walk still happening?

Sean McAdam
301-591-4113
Linux Enthusiast / Ham Operator / Geek at Large

On Thu, Apr 21, 2016 at 10:45 PM, Jeff Fishman <ljfish1 at comcast.net> wrote:

> Frederick ARES has again been asked to provide communications support 
> for the March of Dimes March for Babies on Sunday, May 1st, in 
> Middletown Community Park. We need about 4-5 hams with 2M HT?s and 
> we?ll use 146.580 simplex. The walk starts at 1330, so we?ll meet at 
> the starting area at
> 1300
> and deploy from there and the walk should last about 1 ? to 2 hours.
>
>
>
> As always, ARES membership is not required to participate. If you want 
> to help but don?t have an HT, we?ll have one or two loaners available.
>
>
>
> Please let me know if you can help and if you have your own HT to use.
> Thanks.
>
>
>
> 73,
>
>
>
> Jeff Fishman KB3FIO
>
> Frederick ARES EC
>
> ljfish1 at comcast.net
>
> 240-285-6596
>
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC at mailman.qth.net
>
> This list hosted by: http://www.qsl.net Please help support this email 
> list: http://www.qsl.net/donate.html
>
______________________________________________________________
FARC mailing list
Home: http://mailman.qth.net/mailman/listinfo/farc
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:FARC 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 devilbiss at hood.edu  Sun May  1 12:18:10 2016
From: devilbiss at hood.edu (Devilbiss, James)
Date: Sun, 1 May 2016 16:18:10 +0000
Subject: [FARC] Operators needed for March for Babies 5/1
In-Reply-To: <CA+Stcou0TYVUTH=4Ky85uyfBkZrzHms3W6p=EpRGZuyfhmm5_g@mail.gmail.com>
References: <001201d19c41$00938450$01ba8cf0$@comcast.net>,
	<CA+Stcou0TYVUTH=4Ky85uyfBkZrzHms3W6p=EpRGZuyfhmm5_g@mail.gmail.com>
Message-ID: <E95B6FD9-BB3E-42DC-A471-7664FF0EA73D@hood.edu>

That's my question I've sent Jeff an email and have not received an answer yet
Jim
wa3fuj

James Devilbiss
Hood College
Mathematics Department 
Frederick 
Maryland
21701

> On May 1, 2016, at 12:09 PM, Sean McAdam <sean at fredcom.com> wrote:
> 
> Is the MOD walk still happening?
> 
> Sean McAdam
> 301-591-4113
> Linux Enthusiast / Ham Operator / Geek at Large
> 
>> On Thu, Apr 21, 2016 at 10:45 PM, Jeff Fishman <ljfish1 at comcast.net> wrote:
>> 
>> Frederick ARES has again been asked to provide communications support for
>> the March of Dimes March for Babies on Sunday, May 1st, in Middletown
>> Community Park. We need about 4-5 hams with 2M HT?s and we?ll use 146.580
>> simplex. The walk starts at 1330, so we?ll meet at the starting area at
>> 1300
>> and deploy from there and the walk should last about 1 ? to 2 hours.
>> 
>> 
>> 
>> As always, ARES membership is not required to participate. If you want to
>> help but don?t have an HT, we?ll have one or two loaners available.
>> 
>> 
>> 
>> Please let me know if you can help and if you have your own HT to use.
>> Thanks.
>> 
>> 
>> 
>> 73,
>> 
>> 
>> 
>> Jeff Fishman KB3FIO
>> 
>> Frederick ARES EC
>> 
>> ljfish1 at comcast.net
>> 
>> 240-285-6596
>> 
>> ______________________________________________________________
>> FARC mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/farc
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:FARC at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC 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 devilbiss at hood.edu  Sun May  1 12:20:03 2016
From: devilbiss at hood.edu (Devilbiss, James)
Date: Sun, 1 May 2016 16:20:03 +0000
Subject: [FARC] Operators needed for March for Babies 5/1
In-Reply-To: <CA+Stcou0TYVUTH=4Ky85uyfBkZrzHms3W6p=EpRGZuyfhmm5_g@mail.gmail.com>
References: <001201d19c41$00938450$01ba8cf0$@comcast.net>,
	<CA+Stcou0TYVUTH=4Ky85uyfBkZrzHms3W6p=EpRGZuyfhmm5_g@mail.gmail.com>
Message-ID: <9FEF9B1C-E124-4D08-A177-6BF99D786091@hood.edu>

I just received an email from Jeff he's on his way over to Middletown where I am and he has not had any information.

James Devilbiss
Hood College
Mathematics Department 
Frederick 
Maryland
21701

> On May 1, 2016, at 12:09 PM, Sean McAdam <sean at fredcom.com> wrote:
> 
> Is the MOD walk still happening?
> 
> Sean McAdam
> 301-591-4113
> Linux Enthusiast / Ham Operator / Geek at Large
> 
>> On Thu, Apr 21, 2016 at 10:45 PM, Jeff Fishman <ljfish1 at comcast.net> wrote:
>> 
>> Frederick ARES has again been asked to provide communications support for
>> the March of Dimes March for Babies on Sunday, May 1st, in Middletown
>> Community Park. We need about 4-5 hams with 2M HT?s and we?ll use 146.580
>> simplex. The walk starts at 1330, so we?ll meet at the starting area at
>> 1300
>> and deploy from there and the walk should last about 1 ? to 2 hours.
>> 
>> 
>> 
>> As always, ARES membership is not required to participate. If you want to
>> help but don?t have an HT, we?ll have one or two loaners available.
>> 
>> 
>> 
>> Please let me know if you can help and if you have your own HT to use.
>> Thanks.
>> 
>> 
>> 
>> 73,
>> 
>> 
>> 
>> Jeff Fishman KB3FIO
>> 
>> Frederick ARES EC
>> 
>> ljfish1 at comcast.net
>> 
>> 240-285-6596
>> 
>> ______________________________________________________________
>> FARC mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/farc
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:FARC at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC 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 ljfish1 at comcast.net  Sun May  1 20:51:48 2016
From: ljfish1 at comcast.net (Jeff Fishman)
Date: Sun, 1 May 2016 20:51:48 -0400
Subject: [FARC] March of Dimes Thanks
Message-ID: <000301d1a40c$cefc5060$6cf4f120$@comcast.net>

My thanks to the following operators who helped provide communications at
today's March Of Dimes March for Babies at Middletown Park:

 

Mike K3DO

Matt KB3FTP

Jim WA3FUJ

Sean NE3RD

Herb K3HCP 

Mark AB3KS

 

Providing communications support for public service events such as this not
only helps worthy community causes, but gives us vital experience in net
operations that can then be used in real emergencies.

 

Thanks again everyone.

 

73,

 

Jeff KB3FIO

ARES EC


From wn3r.us at gmail.com  Thu May  5 13:05:23 2016
From: wn3r.us at gmail.com (Dick, WN3R)
Date: Thu, 5 May 2016 13:05:23 -0400
Subject: [FARC] Imagine you're 10 years old again
Message-ID: <24F6773D-2AB3-4995-9739-0885D247AADE@gmail.com>

If you think ham radio has an age problem, keep reading.

I have quite of few, but I could use more electronic projects for the electronics studio at the KID Museum.

Please suggest a project and email me the schematic. It does not have to be Ham Radio related, but I do have some requirements.

Power supply, ideally 9vdc or less, but will accept 12 volts.

Must fit on a bread board with .1" spacing, 2"x3". 
No more than 10-15 components on the board itself, not counting items such as speaker, headphones, morse code key, etc.

The kids will build their projects over one or two sessions and take them home to keep.

We already have in the works:
Crystal Radio
Code practice oscillator with NE555 timer chip
Field Strength meter
Audio amplifier
Logic gate examples
Intercom
Wireless charging pad
Touch me not game
Cypher Locks
Continuity tester
Fruit Battery

And if you "think" you might like to work directly with the kids or operate the club station, KM3KID, please let me know. The KID Museum is near Montgomery Mall. Your XYL or YL can shop while you're helping out and then you can see a movie or have dinner in the mall. Better yet, enroll your child/grandchild in a KM session.

https://www.youtube.com/watch?v=NXhoU_oZ2-o  (2 minute video)

73, Dick, wn3r.us at gmail.com


From m.e.whitmore at comcast.net  Mon May  9 17:03:28 2016
From: m.e.whitmore at comcast.net (Mark Whitmore)
Date: Mon, 9 May 2016 17:03:28 -0400
Subject: [FARC] Fox Hunt
Message-ID: <5730FB20.8080005@comcast.net>

Fox hunt Saturday 5/14 Walkersville Heritage Farm Park 9224 Devilbiss 
Bridge Road, Walkersville MD.

From ab3rw at aol.com  Mon May  9 18:07:16 2016
From: ab3rw at aol.com (Brian Rozelle)
Date: Mon, 9 May 2016 18:07:16 -0400
Subject: [FARC] The Latest News
Message-ID: <154978f5f1f-366a-bdae@webprd-a67.mail.aol.com>


Don't forget that we will be having a foxhunt on Saturday May 14 at the Heritage Farm Park on Devilbiss Bridge Rd. in Walkersville. We will meet at the front parking lot at 1300 as long as the weather holds out. Next Monday May 16 will also be our regularly scheduled club meeting. Join us at the social hall at the Independent Hose fire station at 300 Baughmans Ln at 1900. 

We are also proud to announce that FARC swag can now be purchased online. Just go to  https://shop.spreadshirt.com/frederickarc/?noCache=true.
 For t-shirts, phone cases, drink containers all with the FARC logo. For anyone who participates in testing with us you can also get an FARC Laurel VEC t-shirt.

Finally, we are developing an online presence via social media. You can now find the club on Facebook as well as Meetup.com. Come join us.
73
Brian AB3RW

From ab3rw at aol.com  Tue May 10 18:24:44 2016
From: ab3rw at aol.com (Brian Rozelle)
Date: Tue, 10 May 2016 18:24:44 -0400
Subject: [FARC] Club secretary
Message-ID: <85274D09-F7ED-455E-A3DD-CE862D29E042@aol.com>

We are still looking for someone to take over as the Secretary for the club. Emmett has done a fantastic job but he is ready to pass the torch. Anyone wishing to take the position please let me know ASAP.

73
Brian AB3RW

Sent from my iPhone

From ab3rw at aol.com  Fri May 13 09:42:47 2016
From: ab3rw at aol.com (Brian)
Date: Fri, 13 May 2016 09:42:47 -0400
Subject: [FARC] Fox hunt
Message-ID: <94308070-0B98-47F2-B13E-41E53AE197BE@aol.com>

Since there is a threat of thunderstorms tomorrow afternoon the Fox hunt has been moved to next weekend May 21. The time and location remain the same. Hope to see you there
Brian
AB3RW

Sent from my iPad

From ab3rw at aol.com  Sun May 15 13:35:54 2016
From: ab3rw at aol.com (Brian Rozelle)
Date: Sun, 15 May 2016 13:35:54 -0400
Subject: [FARC] Club meeting
Message-ID: <3E99DA6C-A8C8-4EBD-9F06-261276270395@aol.com>

Monday May 16 is our regular monthly club meeting. We will be in the social hall at the Independent Hose fire station 300 Baughmans Ln. We will start at 1900. Hope to see you there.

73
Brian AB3RW

Sent from my iPhone

From ab3rw at aol.com  Wed May 18 18:03:15 2016
From: ab3rw at aol.com (Brian)
Date: Wed, 18 May 2016 18:03:15 -0400
Subject: [FARC] Fox Hunt
Message-ID: <8969A008-DF7D-4A40-8095-1B7C0DA35C7E@aol.com>

It looks like Saturday is going to be a washout again. The Fox Hunt will be rescheduled for Saturday June 11 at 1300. The location is the same, Heritage Farm Park on Devilbiss Bridge Rd in Walkersville. Keep your fingers crossed and hope for sunshine.

73
Brian AB3RW

Sent from my iPad

From wn3r.us at gmail.com  Fri May 20 04:53:02 2016
From: wn3r.us at gmail.com (Dick,WN3R)
Date: Fri, 20 May 2016 04:53:02 -0400
Subject: [FARC] KM3KID, KID Museum ARC
Message-ID: <2DBD3C49-ECA5-44FB-A2E5-DE3EDD074D7F@gmail.com>

The KID Museum will demo Ham Radio tomorrow, Saturday, between 1 and 3pm.

We will be on 20 meters SSB. Please fire up your rig or drop by.

We might also be on the MARC 2 meter repeater if HF conditions are horrible.

Please pass along.

73, Dick, WN3R 

Richard 
202-497-2840
Sent from my iPad

From ljfish1 at comcast.net  Tue May 31 11:19:22 2016
From: ljfish1 at comcast.net (Jeff Fishman)
Date: Tue, 31 May 2016 11:19:22 -0400
Subject: [FARC] Looking for a scope
Message-ID: <002201d1bb4f$cfca30c0$6f5e9240$@comcast.net>

Does anyone have an oscilloscope I can borrow for a few days? A friend of
mine just had a solar system installed at his home, and I'd like to see how
clean the AC wave really is before I take the leap.

 

Thanks.

 

Jeff KB3FIO


From devilbiss at hood.edu  Tue May 31 14:15:48 2016
From: devilbiss at hood.edu (Devilbiss, James)
Date: Tue, 31 May 2016 18:15:48 +0000
Subject: [FARC] Looking for a scope
In-Reply-To: <002201d1bb4f$cfca30c0$6f5e9240$@comcast.net>
References: <002201d1bb4f$cfca30c0$6f5e9240$@comcast.net>
Message-ID: <C5796732-2AC9-4CA2-8BF0-D10297D73681@hood.edu>

Jeff I'm sorry I don't have one now. However my neighbor also just had an insulation and I would be interested to know the results. I plan on giving my neighbor through the winter and see how it works out before I commit. Jim WA3FUJ

James Devilbiss
Mathematics Department
H 259
Statistics
Hood College
Frederick
Maryland
21702

> On May 31, 2016, at 11:19 AM, Jeff Fishman <ljfish1 at comcast.net> wrote:
> 
> Does anyone have an oscilloscope I can borrow for a few days? A friend of
> mine just had a solar system installed at his home, and I'd like to see how
> clean the AC wave really is before I take the leap.
> 
> 
> 
> Thanks.
> 
> 
> 
> Jeff KB3FIO
> 
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC 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 bjn at xecu.net  Tue May 31 15:25:02 2016
From: bjn at xecu.net (Ben Nardi)
Date: Tue, 31 May 2016 15:25:02 -0400
Subject: [FARC] Looking for a scope
In-Reply-To: <002201d1bb4f$cfca30c0$6f5e9240$@comcast.net>
References: <002201d1bb4f$cfca30c0$6f5e9240$@comcast.net>
Message-ID: <c9e7cf50-2c81-a5ad-c20e-99a26942939d@xecu.net>

Jeff I have a scope I can bring to next meeting. Also you can probably 
download Spectrum Lab by DL4YHF

http://www.qsl.net/dl4yhf/spectra1.html

Load this on your pc, set span to cover 0 - 500Hz or so and feed a 
sample of 60 Hz into sound card and look at harmonics...
I have found this software really useful for all kinds of stuff.
Also there probably are other programs that turn your pc into a audio 
scope using the sound card. Actually Spectrum Lab may also do that, I 
just never tried that.

Regards,
Ben  W3ZUP

On 5/31/2016 11:19 AM, Jeff Fishman wrote:
> Does anyone have an oscilloscope I can borrow for a few days? A friend of
> mine just had a solar system installed at his home, and I'd like to see how
> clean the AC wave really is before I take the leap.
>
>   
>
> Thanks.
>
>   
>
> Jeff KB3FIO
>
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC 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 bjn at xecu.net  Tue May 31 15:41:08 2016
From: bjn at xecu.net (Ben Nardi)
Date: Tue, 31 May 2016 15:41:08 -0400
Subject: [FARC] Looking for a scope
In-Reply-To: <c9e7cf50-2c81-a5ad-c20e-99a26942939d@xecu.net>
References: <002201d1bb4f$cfca30c0$6f5e9240$@comcast.net>
	<c9e7cf50-2c81-a5ad-c20e-99a26942939d@xecu.net>
Message-ID: <827a4028-ad85-3ccb-69ce-74716497cf40@xecu.net>

Actually Spectrum Lab does have a time domain scope function. I just 
looked at it.


On 5/31/2016 3:25 PM, Ben Nardi wrote:
> Jeff I have a scope I can bring to next meeting. Also you can probably 
> download Spectrum Lab by DL4YHF
>
> http://www.qsl.net/dl4yhf/spectra1.html
>
> Load this on your pc, set span to cover 0 - 500Hz or so and feed a 
> sample of 60 Hz into sound card and look at harmonics...
> I have found this software really useful for all kinds of stuff.
> Also there probably are other programs that turn your pc into a audio 
> scope using the sound card. Actually Spectrum Lab may also do that, I 
> just never tried that.
>
> Regards,
> Ben  W3ZUP
>
> On 5/31/2016 11:19 AM, Jeff Fishman wrote:
>> Does anyone have an oscilloscope I can borrow for a few days? A 
>> friend of
>> mine just had a solar system installed at his home, and I'd like to 
>> see how
>> clean the AC wave really is before I take the leap.
>>
>>
>> Thanks.
>>
>>
>> Jeff KB3FIO
>>
>> ______________________________________________________________
>> FARC mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/farc
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:FARC at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC 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 m.e.whitmore at comcast.net  Tue May 31 16:18:01 2016
From: m.e.whitmore at comcast.net (Mark Whitmore)
Date: Tue, 31 May 2016 16:18:01 -0400
Subject: [FARC] Looking for a scope
In-Reply-To: <002201d1bb4f$cfca30c0$6f5e9240$@comcast.net>
References: <002201d1bb4f$cfca30c0$6f5e9240$@comcast.net>
Message-ID: <574DF179.8070204@comcast.net>

Jeff,

I have a Tektronics 465 that you are welcome to borrow.  I would also 
like to know what the inverter
output looks like.  I am pretty sure it is NOT going to be a sine wave.  
The ones I have seen are called
"modified sine wave" and have about 33% third harmonic content.  It 
looks like a central rectangle with
a shorter rectangle on each side followed by the inverse (negative) of 
this. There are essentially six chunks
of voltage with an RMS value of 120.  Don't think they bother to shape 
the edges since this would result
in more dissipation in the transistors.  I would also be willing to bet 
that there are no requirements to limit
electromagnetic radiation from either the solar array or the house 
wiring.   Have you turned on your radio
since the neighbor went solar?

Mark

On 5/31/2016 11:19 AM, Jeff Fishman wrote:
> Does anyone have an oscilloscope I can borrow for a few days? A friend of
> mine just had a solar system installed at his home, and I'd like to see how
> clean the AC wave really is before I take the leap.
>
>   
>
> Thanks.
>
>   
>
> Jeff KB3FIO
>
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC 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 ljfish1 at comcast.net  Tue May 31 22:07:02 2016
From: ljfish1 at comcast.net (Jeff Fishman)
Date: Tue, 31 May 2016 22:07:02 -0400
Subject: [FARC] Looking for a scope
In-Reply-To: <574DF179.8070204@comcast.net>
References: <002201d1bb4f$cfca30c0$6f5e9240$@comcast.net>
	<574DF179.8070204@comcast.net>
Message-ID: <007e01d1bbaa$4a7570a0$df6051e0$@comcast.net>

Mark,
My friend actually lives in Hagerstown, so the RFI wouldn't be a factor for
me! He became aware of the "wave" issue when an electric clock began gaining
about two minutes a day. Modern inverters produce a much "closer to sine"
wave but still not perfect. Will we need a special probe to measure line AC?
Jeff

-----Original Message-----
From: FARC [mailto:farc-bounces at mailman.qth.net] On Behalf Of Mark Whitmore
Sent: Tuesday, May 31, 2016 4:18 PM
To: Frederick, Maryland ARC
Subject: Re: [FARC] Looking for a scope

Jeff,

I have a Tektronics 465 that you are welcome to borrow.  I would also like
to know what the inverter output looks like.  I am pretty sure it is NOT
going to be a sine wave.  
The ones I have seen are called
"modified sine wave" and have about 33% third harmonic content.  It looks
like a central rectangle with a shorter rectangle on each side followed by
the inverse (negative) of this. There are essentially six chunks of voltage
with an RMS value of 120.  Don't think they bother to shape the edges since
this would result in more dissipation in the transistors.  I would also be
willing to bet that there are no requirements to limit electromagnetic
radiation from either the solar array or the house 
wiring.   Have you turned on your radio
since the neighbor went solar?

Mark

On 5/31/2016 11:19 AM, Jeff Fishman wrote:
> Does anyone have an oscilloscope I can borrow for a few days? A friend of
> mine just had a solar system installed at his home, and I'd like to see
how
> clean the AC wave really is before I take the leap.
>
>   
>
> Thanks.
>
>   
>
> Jeff KB3FIO
>
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

______________________________________________________________
FARC mailing list
Home: http://mailman.qth.net/mailman/listinfo/farc
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:FARC 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 ljfish1 at comcast.net  Tue May 31 22:11:49 2016
From: ljfish1 at comcast.net (Jeff Fishman)
Date: Tue, 31 May 2016 22:11:49 -0400
Subject: [FARC] Looking for a scope
In-Reply-To: <827a4028-ad85-3ccb-69ce-74716497cf40@xecu.net>
References: <002201d1bb4f$cfca30c0$6f5e9240$@comcast.net>	<c9e7cf50-2c81-a5ad-c20e-99a26942939d@xecu.net>
	<827a4028-ad85-3ccb-69ce-74716497cf40@xecu.net>
Message-ID: <008001d1bbaa$f55c0ce0$e01426a0$@comcast.net>

Ben,
Thanks. We'll check out the Spectrum Lab program.
Jeff

-----Original Message-----
From: FARC [mailto:farc-bounces at mailman.qth.net] On Behalf Of Ben Nardi
Sent: Tuesday, May 31, 2016 3:41 PM
To: farc at mailman.qth.net
Subject: Re: [FARC] Looking for a scope

Actually Spectrum Lab does have a time domain scope function. I just looked
at it.


On 5/31/2016 3:25 PM, Ben Nardi wrote:
> Jeff I have a scope I can bring to next meeting. Also you can probably 
> download Spectrum Lab by DL4YHF
>
> http://www.qsl.net/dl4yhf/spectra1.html
>
> Load this on your pc, set span to cover 0 - 500Hz or so and feed a 
> sample of 60 Hz into sound card and look at harmonics...
> I have found this software really useful for all kinds of stuff.
> Also there probably are other programs that turn your pc into a audio 
> scope using the sound card. Actually Spectrum Lab may also do that, I 
> just never tried that.
>
> Regards,
> Ben  W3ZUP
>
> On 5/31/2016 11:19 AM, Jeff Fishman wrote:
>> Does anyone have an oscilloscope I can borrow for a few days? A 
>> friend of
>> mine just had a solar system installed at his home, and I'd like to 
>> see how
>> clean the AC wave really is before I take the leap.
>>
>>
>> Thanks.
>>
>>
>> Jeff KB3FIO
>>
>> ______________________________________________________________
>> FARC mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/farc
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:FARC at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

______________________________________________________________
FARC mailing list
Home: http://mailman.qth.net/mailman/listinfo/farc
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:FARC 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 m.e.whitmore at comcast.net  Tue May 31 23:32:57 2016
From: m.e.whitmore at comcast.net (Mark Whitmore)
Date: Tue, 31 May 2016 23:32:57 -0400
Subject: [FARC] Looking for a scope
In-Reply-To: <007e01d1bbaa$4a7570a0$df6051e0$@comcast.net>
References: <002201d1bb4f$cfca30c0$6f5e9240$@comcast.net>
	<574DF179.8070204@comcast.net>
	<007e01d1bbaa$4a7570a0$df6051e0$@comcast.net>
Message-ID: <574E5769.1090404@comcast.net>

Jeff,

The safest way to connect the scope is with a special cord that I can 
provide.  This will have a
BNC connector on one end and a standard 120v AC connector on the other.  
The cord will have
a 1000 ohm resistor in series and a 50 ohm resistor to common giving a 
reduced voltage into
the scope of 20 to 1.  The peak voltage will be +/- 120 * 1.4 /20 = +/- 
8.4 volts.

Let me know if you want to go with this arrangement.

Mark
On 5/31/2016 10:07 PM, Jeff Fishman wrote:
> Mark,
> My friend actually lives in Hagerstown, so the RFI wouldn't be a factor for
> me! He became aware of the "wave" issue when an electric clock began gaining
> about two minutes a day. Modern inverters produce a much "closer to sine"
> wave but still not perfect. Will we need a special probe to measure line AC?
> Jeff
>
> -----Original Message-----
> From: FARC [mailto:farc-bounces at mailman.qth.net] On Behalf Of Mark Whitmore
> Sent: Tuesday, May 31, 2016 4:18 PM
> To: Frederick, Maryland ARC
> Subject: Re: [FARC] Looking for a scope
>
> Jeff,
>
> I have a Tektronics 465 that you are welcome to borrow.  I would also like
> to know what the inverter output looks like.  I am pretty sure it is NOT
> going to be a sine wave.
> The ones I have seen are called
> "modified sine wave" and have about 33% third harmonic content.  It looks
> like a central rectangle with a shorter rectangle on each side followed by
> the inverse (negative) of this. There are essentially six chunks of voltage
> with an RMS value of 120.  Don't think they bother to shape the edges since
> this would result in more dissipation in the transistors.  I would also be
> willing to bet that there are no requirements to limit electromagnetic
> radiation from either the solar array or the house
> wiring.   Have you turned on your radio
> since the neighbor went solar?
>
> Mark
>
> On 5/31/2016 11:19 AM, Jeff Fishman wrote:
>> Does anyone have an oscilloscope I can borrow for a few days? A friend of
>> mine just had a solar system installed at his home, and I'd like to see
> how
>> clean the AC wave really is before I take the leap.
>>
>>    
>>
>> Thanks.
>>
>>    
>>
>> Jeff KB3FIO
>>
>> ______________________________________________________________
>> FARC mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/farc
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:FARC at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>