[ARC5] ARC5 Digest, Vol 118, Issue 61
Tom Bridgers
tarheel6 at msn.com
Fri Nov 22 13:50:41 EST 2013
Me too, Bruce.
Thanks,
-Tom KE4RHH
> From: arc5-request at mailman.qth.net
> Subject: ARC5 Digest, Vol 118, Issue 61
> To: arc5 at mailman.qth.net
> Date: Fri, 22 Nov 2013 11:50:39 -0500
>
> Send ARC5 mailing list submissions to
> arc5 at mailman.qth.net
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://mailman.qth.net/mailman/listinfo/arc5
> or, via email, send a message with subject or body 'help' to
> arc5-request at mailman.qth.net
>
> You can reach the person managing the list at
> arc5-owner at mailman.qth.net
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of ARC5 digest..."
>
>
> Today's Topics:
>
> 1. Re: Square wave oscillators (Robert Eleazer)
> 2. Re: Looks Very Interesting (Jay Coward)
> 3. Re: Square wave oscillators (Robert Nickels)
> 4. Re: Square wave oscillators (Bruce Long)
> 5. Re: Square wave oscillators (David Stinson)
> 6. Re: Square wave oscillators (Kenneth G. Gordon)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 22 Nov 2013 10:43:26 -0500
> From: "Robert Eleazer" <releazer at earthlink.net>
> To: <arc5 at mailman.qth.net>
> Subject: Re: [ARC5] Square wave oscillators
> Message-ID: <00a701cee799$97b299c0$cd6bd942 at DH26DQ31>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I had assumed that tuned circuits associated with mixers and amplifiers would tend to hammer the square waves into "close enough" signals, just as such circuits turn the badly shaped outputs of Class C amplifiers into useful signals. But I thought I would ask. I was aware that David had used some modules as crystal replacements but was under the impression that those were sine wave output devices.
>
> As for BFO's - oh, yes, the first BFO I ever built and added to a receiver - using a 455 KHZ IF coil and a PNP transistor per in a circuit shown in 73 Magazine - was an effective BFO, plenty of signal even with very loose coupling to the IF - but was an even more effective jammer at multiples of the BFO frequency. The set would start going "Whoop! Whoop!"
>
> Thanks,
>
> Wayne
>
> ------------------------------
>
> Message: 2
> Date: Fri, 22 Nov 2013 10:43:56 -0500 (EST)
> From: Jay Coward <jcoward5452 at aol.com>
> To: releazer at earthlink.net, arc5 at mailman.qth.net
> Subject: Re: [ARC5] Looks Very Interesting
> Message-ID: <8D0B5B0C966B8E1-13D0-58774 at webmail-d171.sysops.aol.com>
> Content-Type: text/plain; charset="us-ascii"
>
>
> This is the attempt to autotune the ARC-5. It's called the Yardley Spot tuner. I have the R-26 and R-27 mounted in a dual rack mount. To do this you have to relocate the control connector to the front. The control box for this was experimental and never produced in quantity. I plan on modifying two ART-13 boxes to accomplish remote control.
> All on my infinate to do list.
> Jay KE6PPF
>
>
>
> -----Original Message-----
> From: Robert Eleazer <releazer at earthlink.net>
> To: arc5 <arc5 at mailman.qth.net>
> Sent: Thu, Nov 21, 2013 5:31 pm
> Subject: [ARC5] Looks Very Interesting
>
>
> Reference ebay item 181265137815
> Wayne
> _____________________________________________________________
> RC5 mailing list
> ome: http://mailman.qth.net/mailman/listinfo/arc5
> elp: http://mailman.qth.net/mmfaq.htm
> ost: mailto:ARC5 at mailman.qth.net
> This list hosted by: http://www.qsl.net
> lease help support this email list: http://www.qsl.net/donate.html
>
>
>
> ------------------------------
>
> Message: 3
> Date: Fri, 22 Nov 2013 10:38:05 -0600
> From: Robert Nickels <ranickel at comcast.net>
> To: arc5 at mailman.qth.net
> Subject: Re: [ARC5] Square wave oscillators
> Message-ID: <528F886D.7010205 at comcast.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 11/22/2013 5:09 AM, David Stinson wrote:
> > I've heard all the "it won't work for (fill in reason)." In my
> > applications, they work just fine and are about 1/10th the cost of a
> > crystal.
>
> Me too, as you know Dave, as I posted last night. In fact, I used a
> Transworld 5S channelized SSB transceiver on the air shortly after that,
> and it was heard from coast to coast. And despite the BS someone
> posted earlier today about "digital devices don't care", putting out a
> clean signal has nothing to do with how the signal is generated. Every
> single commercial radio on the market for the past decade or more has
> used digital frequency synthesis of one kind or another, and they all
> put out perfectly clean FCC- compliant signals. The little oscillators
> that Dave and I use incorporate PLL technology, just like millions of
> radios in daily use do, and as I stated, existing filtering ensures a
> clean signal. To quote Dave: "they work just fine".
>
> For those who want to connect the output directly to an antenna, or
> through circuitry that doesn't provide sufficient filtering, there's a
> simple solution. It's called a Low Pass Filter....hams have been using
> them for years and they're simple and cheap to make. The standard
> design used by QRPers dates back 30 years, and has been used by
> countless builders and commercial radios. I use these filters on my
> Raspberry Pi to generate WSPR signals that have been heard as far away
> as Australia, with a power output of < 50 mW.
>
> Here is the link to the design info, courtesy of GQRP:
> http://www.gqrp.com/harmonic_filters.pdf
>
> 73 and happy "digital" oscillations!
>
> Bob W9RAN
>
>
> ------------------------------
>
> Message: 4
> Date: Fri, 22 Nov 2013 08:44:49 -0800 (PST)
> From: Bruce Long <coolbrucelong at yahoo.com>
> To: "W9RAN at oneradio.net" <W9RAN at oneradio.net>, "arc5 at mailman.qth.net"
> <arc5 at mailman.qth.net>
> Subject: Re: [ARC5] Square wave oscillators
> Message-ID:
> <1385138689.41002.YahooMailNeo at web160805.mail.bf1.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
> there is a very simple way to design a three component pi or tee filter to convert a logic squar(ish) wave into a sine wave into a fifty ( or other impedance) load.? It is based upon the use of Termans Impedance matching network design method as published in radio Engineering.?? I have had very very good results and will write it up for this group if there is evident interest.
>
>
>
>
>
> On Friday, November 22, 2013 11:38 AM, Robert Nickels <ranickel at comcast.net> wrote:
>
> On 11/22/2013 5:09 AM, David Stinson wrote:
> > I've heard all the "it won't work for (fill in reason)."? In my
> > applications, they work just fine and are about 1/10th the cost of a
> > crystal.
>
> Me too, as you know Dave, as I posted last night.? In fact, I used a
> Transworld 5S channelized SSB transceiver on the air shortly after that,
> and it was heard from coast to coast.? And despite the BS someone
> posted earlier today about "digital devices don't care", putting out a
> clean signal has nothing to do with how the signal is generated.? Every
> single commercial radio on the market for the past decade or more has
> used digital frequency synthesis of one kind or another, and they all
> put out perfectly clean FCC- compliant signals.? The little oscillators
> that Dave and I use incorporate PLL technology, just like millions of
> radios in daily use do, and as I stated, existing filtering ensures a
> clean signal.? To quote Dave:? "they work just fine".
>
> For those who want to connect the output directly to an antenna, or
> through circuitry that doesn't provide sufficient filtering, there's a
> simple solution.? It's called a Low Pass Filter....hams have been using
> them for years and they're simple and cheap to make.? ? The standard
> design used by QRPers dates back 30 years, and has been used by
> countless builders and commercial radios.? I use these filters on my
> Raspberry Pi to generate WSPR signals that have been heard as far away
> as Australia, with a power output of < 50 mW.
>
> Here is the link to the design info, courtesy of GQRP:
> http://www.gqrp.com/harmonic_filters.pdf
>
> 73 and happy "digital" oscillations!
>
> Bob W9RAN
>
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 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: 5
> Date: Fri, 22 Nov 2013 10:48:08 -0600
> From: "David Stinson" <arc5 at ix.netcom.com>
> To: <arc5 at mailman.qth.net>
> Subject: Re: [ARC5] Square wave oscillators
> Message-ID: <79B59C07972244D7B0296E41855D888A at CompaqSR5710F>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
>
> ----- Original Message -----
> From: "Bruce Long" <coolbrucelong at yahoo.com>
>
> > there is a very simple way to design a three component
> > pi or tee filter
>
> I'd like to see it when you get a chance, Bruce. Thanks.
>
>
>
> ------------------------------
>
> Message: 6
> Date: Fri, 22 Nov 2013 08:52:33 -0800
> From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
> To: Bruce Long <coolbrucelong at yahoo.com>
> Cc: ARC-5 List <arc5 at mailman.qth.net>
> Subject: Re: [ARC5] Square wave oscillators
> Message-ID: <528F8BD1.5612.3F271F3 at kgordon2006.frontier.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> On 22 Nov 2013 at 8:44, Bruce Long wrote:
>
> > there is a very simple way to design a three component pi or tee
> > filter to convert a logic squar(ish) wave into a sine wave into a
> > fifty ( or other impedance) load.? It is based upon the use of Termans
> > Impedance matching network design method as published in radio
> > Engineering.?? I have had very very good results and will write it up
> > for this group if there is evident interest.
>
> Well, I am most certainly interested, Bruce.
>
> Ken W7EKB
>
>
> ------------------------------
>
> _______________________________________________
> ARC5 mailing list
> ARC5 at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/arc5
>
>
> End of ARC5 Digest, Vol 118, Issue 61
> *************************************
More information about the ARC5
mailing list