[TMC] TMC PTE more cleaning!

[John Poulton]

Just a reminder that, with Tony's help, Jay Spivak overhauled the AO-100
inside his GPT-750 (it's exactly the same oven-stabilized oscillator as
inside the VOX's and PMO's).  Jay wrote up a very nice report on how to do
this, along with photos:

http://tmchistory.org/tmc_restoration/paul_spivak_docs/gpt_750_mo_repair.htm

A shorter version appeared in Electric Radio few years back.

As always:  Thanks, Tony!!

73, John K4OZY



On Mon, Sep 5, 2016 at 6:10 PM, W2HX <w2hx at w2hx.com> wrote:

> Hi Tony. Thanks very much for the info and background. For cleaning, very
> simple. I use diluted simply green in a spray bottle. Then I use the garden
> hose to clear it all out. Let it sit in the sun for a day or two and voila!
>
> It will likely be some time before I can try to power anything up with
> work and life obligations. But I will be sure to reach out to you for the
> help I will undoubtedly need!
>
> Regards
> Eugene W2HX
> PS is the romeo net still going?
>
> From: arfaiola [mailto:arfaiola at starpower.net]
> Sent: Thursday, September 01, 2016 10:19 PM
> To: W2HX
> Cc: TMC at mailman.qth.net
> Subject: Re: [TMC] TMC PTE more cleaning!
>
> OMG does the first picture bring back memories!  It was one of my projects
> at TMC. Eugene.  Did I misss something or has age got me..what did you use
> as a cleaning agent, it looks good.
> Now, the big question is when you run the vfo from 2 through 4, do you see
> a smooth output?  Reason I ask this question is that over the many years,
> you may (as some others) find some drop outs over the course of the very
> slow sweep of the frequencies.  If this is the case, then removal of the
> vfo will be necessary.  The vfo removal procedure is not in any of the
> manuals. We had the customer send it back for repair.  I have assisted
> others with this process with much success, and it is explained step by
> step in the TMC web site repair section.  Have fun with the two-tone linear
> amplifier testing with the PTE.  73, Tony, K3WX (ex W3GBS TMC engineering
> department)
> ________________________________
> From: "W2HX" <w2hx at w2hx.com<mailto:w2hx at w2hx.com>>
> To: TMC at mailman.qth.net<mailto:TMC at mailman.qth.net>
> Sent: Monday, August 29, 2016 5:59:44 PM
> Subject: [TMC] TMC PTE more cleaning!
>
> About a year ago I began working on the TMC PTE which is basically a
> spectrum analyzer for transmitter testing.  Some of you may have seen my
> posts from then.
>
> Some pictures of what a PTE-3 is:
> http://www.virhistory.com/navy/xmtrs/test/tmc-pte-03.JPG
>
> At the end of the fall last year, I still had more unit to clean that I
> just didn't get around to until now.  This is the VOX-5 unit that provides
> the RF that is mixed with the desired signal to get the IF sweep for the
> display.  Part of the reason I didn't get to it last year was it looked
> like a huge cleaning project that I just couldn't muster up the energy to
> tackle! But now I have. Still some pitting from the mouse piss but looks
> very nice.  Here are some before and after pictures.
>
> http://w2hx.com/x/TMC/PTE/Cleaning/VOX-panel-before.jpg
> http://w2hx.com/x/TMC/PTE/Cleaning/VOX-panel-after.jpg
>
> This was very dirty. Top left removable unit...
> http://w2hx.com/x/TMC/PTE/Cleaning/VOX-topleft-before.jpg
> http://w2hx.com/x/TMC/PTE/Cleaning/VOX-topleft-unit-after.jpg
>
> And once I removed that unit I found that Mickey and Minnie hung out their
> "home sweet home" sign in the lower unit.
> http://w2hx.com/x/TMC/PTE/Cleaning/VOX-bottomleft-before.jpg
> http://w2hx.com/x/TMC/PTE/Cleaning/VOX-bottomleft-after.jpg
>
> and I am always a happy man when I have a nice clean bottom and rear.
> http://w2hx.com/x/TMC/PTE/Cleaning/VOX-bottom-after.jpg
> http://w2hx.com/x/TMC/PTE/Cleaning/VOX-rear-after.jpg
>
> And under one of the covers, all of the tools still intact!
> http://w2hx.com/x/TMC/PTE/Cleaning/VOX-tools.jpg
>
> Next step? Reassemble everything, and start bringing everything up and see
> what it does. Its quite a complex system (at least for me, anyway) so it
> will be some time.
>
> 73, Eugene W2HX
>
> ______________________________________________________________
> TMC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/tmc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:TMC at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> TMC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/tmc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:TMC at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>