[App_rpt-users] What is a PGCM

Chris Perrine (KB2FAF) kb2faf at arrl.net
Thu May 24 12:46:36 EDT 2012


I completely understand!

Thanks for the info.

Chris




On 05/24/2012 12:22 PM, Jim Duuuude wrote:
>
> For sure its not on the website. There just has been WAAAYYY too many 
> things to do and take care of for
> preparation for the Dayton trip, and there now is WAAAAYYY too many 
> things to take care of that were waiting
> for us to get back from Dayton.
>
> If you want one, send email to Mark (micro-node). He will be happy to 
> sell you one.
>
> Jim
>
> ------------------------------------------------------------------------
> Date: Thu, 24 May 2012 12:16:26 -0400
> From: kb2faf at arrl.net
> To: app_rpt-users at ohnosec.org
> Subject: Re: [App_rpt-users] What is a PGCM
>
> Very cool.  Just what I am looking for...although it doesn't look like 
> the PCGM has made it on the web site for sale yet...at least I 
> couldn't fine it.
>
> Chris
>
> KB2FAF
>
>
>
>
>
>
> On 05/24/2012 10:59 AM, Jim Duuuude wrote:
>
>     The PCGM (Programmable Clock Generator Module) is a device used
>     for some configurations
>     of simulcast with the RTCM. For transmitters that can "swallow" a
>     10 MHz external reference clock source
>     (such as the Motorola Quantar, etc), all you need is the output of
>     the RTCM driving the direct
>     modulation of the transmitter. For radios that do not have an
>     external reference clock source
>     (or have one, but not at 10MHz), the PCGM will take the 10Mhz
>     reference from the GPSDO (generally
>     a Trimble Thunderbolt) and "make" whatever frequency your
>     transmitter needs for a reference
>     (at least one of 17988 frequencies possible). Transmitters that do
>     not have an external reference
>     clock input at all generally need to be modified to disconnect the
>     normal internal reference oscillator
>     and make provisions to allow injection of the reference clock
>     frequency from the PCGM.
>
>     In addition the PCGM also generates the voltages (3 of them, I
>     believe) to run the Trimble
>     Thunderbolt, with a single (generally 12 volt) input to the PCGM.
>
>     These devices are available for sale from the Micro-Node.Com site.
>
>     There was also a question on the list about the ClockSynth
>     project. This was merely an initial prototype
>     to prove the base design of the PCGM. There were only 2 boards of
>     this type built. They worked and
>     demonstrated the validity of the general concept from which the
>     PCGM was then based.
>
>     Jim WB6NIL
>
>
>     ------------------------------------------------------------------------
>     Date: Sun, 20 May 2012 20:16:34 -0700
>     From: baldwin88 at yahoo.com <mailto:baldwin88 at yahoo.com>
>     To: app_rpt-users at ohnosec.org <mailto:app_rpt-users at ohnosec.org>
>     Subject: [App_rpt-users] What is a PGCM
>
>     Had a friend who went to Dayton and he saw the Micro Node people
>     with a unit called a PGCM....what is it and what can it do???
>     Frank
>
>
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