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 Post subject: Collins Radio ??
PostPosted: Nov Fri 24, 2017 2:10 pm 
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Joined: Jan Sun 13, 2013 2:46 pm
Posts: 382
Location: Dallastown PA 17313
Can anyone ID this ? I’m assuming a Collins , but what model ??
Thanks
Mike


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14F433CF-C769-4AEF-96D5-CDE3EF6A55D3.jpeg
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8D317B56-0BCE-4893-BBE6-F2B3A88253F4.jpeg
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 Post subject: Re: Collins Radio ??
PostPosted: Nov Fri 24, 2017 3:10 pm 
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Location: 08033 Cherry Hill Jersey
This looks like a homebew I think by hybrid design, and parts from different periods, , some military, extra holes, etc. - the builders' call sign could be W2PJW in lower left of dial face. Very nice front panel!

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 Post subject: Re: Collins Radio ??
PostPosted: Nov Fri 24, 2017 3:22 pm 
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Location: Dallastown PA 17313
I checked the call sign & he’s a SK. So no help that way. It appears to be CW only. I see the key jack but no phone jack ??

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 Post subject: Re: Collins Radio ??
PostPosted: Nov Fri 24, 2017 3:23 pm 
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Have to agree something home brewed. The PTO is Collins needless to say but the rest definitely IS NOT. Don't see any mechanical filters either.

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 Post subject: Re: Collins Radio ??
PostPosted: Nov Fri 24, 2017 5:09 pm 
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It looks like a homebrew receiver using the Collins PTO.

Rodger WQ9E


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 Post subject: Re: Collins Radio ??
PostPosted: Nov Fri 24, 2017 6:03 pm 
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Joined: May Fri 01, 2015 2:33 am
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Location: Roslyn,Pa 19001
PTO is from a 51J/R-388 series receiver.
Looks like a case of too many holes and not enough parts.

Terry


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 Post subject: Re: Collins Radio ??
PostPosted: Nov Fri 24, 2017 6:14 pm 
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Joined: Dec Sat 06, 2014 4:02 pm
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Location: Fergus Falls, Minn
Whatever the chassis used to be, it has 4 modules and some of the circuitry may be original to it.

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 Post subject: Re: Collins Radio ??
PostPosted: Nov Sun 26, 2017 12:36 am 
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Posts: 7473
Location: Beaver Falls, PA. USA
The mode switch does say "SSB 1" and "SSB 2"; most likely LSB and USB. That looks like a PC board on the right side, with a crystal plugged into it. Let's see more pictures!

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 Post subject: Re: Collins Radio ??
PostPosted: Nov Sun 26, 2017 4:24 pm 
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Joined: Jun Mon 24, 2013 3:00 pm
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Location: Champaign IL 61822
Any homemade radio with a Collins PTO in it is worth a full inspection and at least
a good full block schematic. Also determine the coil frequencies with a signal generator
and scope. A mechanical filter or perhaps a phasing network might be
buried under the bottom.

Let's see more good pics! We love a mystery!


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 Post subject: Re: Collins Radio ??
PostPosted: Nov Sun 26, 2017 6:14 pm 
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That one may be worth saving depending upon the level of work that went into it or otherwise it may be a good source of parts for other projects or repairs.

Several years ago I picked up a 75A-3 that had been turned into a solid state "Franken Radio" that bore little resemblance to its former self beyond the front panel. The original tracking front end was replaced and the IF conversion scheme was completely changed and it had multiple printed circuit boards mounted to the chassis. I bought it for $50 because it had an unmolested original cabinet, the PTO, and most importantly 10 Network Science crystal filters of the proper size, bandwidth, and frequency for use in Drake R-4C receivers.

Some homebrew stuff was well made and worth preserving like a nice 1950s era CW transmitter I bought that was nicely built by a woman from Chicago and sold by her son after her death; had I not bought it when I did it was going to be torn apart for parts which would have been a shame. I also bought a nice rack and panel transmitter that has needed some repair work but the original construction was of very good quality. But other pieces are best put out of their misery so the parts can bring something else to life.

Pictures below are of another HB transmitter that was worth restoring. Poor storage resulted in severe damage to the original wooden front panels and there was definitely some electronic work needed and it still hasn't been entirely reliable but I will continue putting this one back in top shape because so much work was put into it by the original builder.

Rodger WQ9E


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HB rear view.jpg
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HB exciter and RF.jpg
HB exciter and RF.jpg [ 243.41 KiB | Viewed 597 times ]
HB underneath exciter deck.jpg
HB underneath exciter deck.jpg [ 240.48 KiB | Viewed 597 times ]
HB modulator and medium voltage decks.jpg
HB modulator and medium voltage decks.jpg [ 228.5 KiB | Viewed 597 times ]
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 Post subject: Re: Collins Radio ??
PostPosted: Nov Sun 26, 2017 11:32 pm 
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Joined: Jan Sun 13, 2013 2:46 pm
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Location: Dallastown PA 17313
I have no other pictures at this time. I’m still trying to get a price from the owner. He hasn’t mention a price but I’m trying .

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 Post subject: Re: Collins Radio ??
PostPosted: Dec Thu 07, 2017 12:54 am 
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Location: Ohio 45177
Just think of the ability to build a homebrew quality receiver or transmitter, and put it to good use, instead of paying more for a factory set. I agree that if it is not a haywire conglomeration but professional looking, it should be preserved or saved. Restored and made to play well is even better. A shame to take a wonderful set made with pride and skill and tear it to pieces for a few little goodies in the junk box. Then again I have had bits and boxes that were only worthwhile as parts resources.


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 Post subject: Re: Collins Radio ??
PostPosted: Dec Sat 09, 2017 2:23 am 
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Joined: Mar Mon 31, 2014 3:09 pm
Posts: 127
Rodger, the under chassis work on that HB transmitter is just beautiful.


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 Post subject: Re: Collins Radio ??
PostPosted: Dec Sat 09, 2017 4:08 am 
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K9DXL wrote:
Rodger, the under chassis work on that HB transmitter is just beautiful.


The original builder did a great job! Too bad some of these old timers didn't attach a QSL card or information to their work because it would be nice to know more about them.

Rodger WQ9E


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