Plessy PTR1851A

mfn002 · Jul 19, 2018

I don’t know where to post this, so I guess I’ll post it here.
I recently bought one (out of curiosity) on eBay. I can’t find much online about it. It is a small, VHF man pack-style transceiver with a very small LED display on top. When I hooked it up to a standard 6 volt lantern battery, the display comes on and says “0”. I can’t get it to do anything else. Anyone have any information about this radio?

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Golay · Jul 19, 2018

You may have just the control head to a larger transceiver. I did a quick Google search, and came up with a picture of a PTR1751. Look similar?

Army Radio Sales Co. :: Aircraft Radios :: Plessey PTR-1751 Airborne UHF/AM Transceiver

RFI-EMI-GUY · Jul 19, 2018

That radio, if you have it all, requires 28 VDC to operate.

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mfn002 · Jul 19, 2018

I think I should have posted a photo of the radio in question.

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RFI-EMI-GUY · Jul 19, 2018

Oh quite a rare beast. Apparently capable of 16 kbps encryption! A keeper. The zero might indicate that it is zeroized, no encryption Key.

Probably not a 28 volt radio. You might search for Plessey Smalltalk to see if that brings up any documents.

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mfn002 · Jul 19, 2018

RFI-EMI-GUY said:
Oh quite a rare beast. Apparently capable of 16 kbps encryption! A keeper. The zero might indicate that it is zeroized, no encryption Key.

Probably not a 28 volt radio. You might search for Plessey Smalltalk to see if that brings up any documents.

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As I said, it powers up on 6 volts. Anyway, the memory battery is missing, so that might explain the zero on the display. There is a small diagram on the side of the radio that shows three watch-type batteries stacked on top of each other. I just wish I knew what type of batteries they were.

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RFI-EMI-GUY · Jul 19, 2018

mfn002 said:
As I said, it powers up on 6 volts. Anyway, the memory battery is missing, so that might explain the zero on the display. There is a small diagram on the side of the radio that shows three watch-type batteries stacked on top of each other. I just wish I knew what type of batteries they were.

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Here is a similar radio, different nomenclature, but it runs from nominal 12V.

Back then, watch batteries wre mercury and about 1.35 V. You can probably get by on newer 1.5V lithiums.

http://radiohistory.uk/plesseyPVS1850.htm

mfn002 · Jul 19, 2018

RFI-EMI-GUY said:
Here is a similar radio, different nomenclature, but it runs from nominal 12V.

Back then, watch batteries wre mercury and about 1.35 V. You can probably get by on newer 1.5V lithiums.

http://radiohistory.uk/plesseyPVS1850.htm

Looks identical to the one I have. I wonder if mine is just a slightly newer version.

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RFI-EMI-GUY · Jul 20, 2018

Check this Yahoo Group for any in the archives and post a picture.

armyradios@yahoogroups.com

Also Brook Clark might have seen one.

PRC68.COM

RFI-EMI-GUY · Jul 23, 2018

Did you get this radio powered up?

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Plessy PTR1851A

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