[MRCA] Chicom Type 883 VHF radio-CORRECTION

[B. Smith]

Any radio that will go to 50.0 is an excellent candidate for moving to 
the relativity small frequency excursion to  to 51.0.  Freq dial 
indication will be off and overall performance may be degraded but would 
be more than adequate for hamfest and military rally ops.
But get it working on its design frequency first.  :-)
Z

On 7/29/2015 2:24 PM, Ray Fantini wrote:
> If you can publish a pdf or jpeg of the schematic I can put together a couple points you can check and maybe get the thing operating again. Worked on several late fifties and early sixties designs and have a fair idea what people were doing back then and would speculate that the radio has a signal HFO for receive and transmit and maybe  its double conversion. The biggest issue I have with a lot of that stuff is it won't make it to 51.0 so it's almost impossible to do anything with.
>
> Ray F
>
> -----Original Message-----
> From: MRCA [mailto:mrca-bounces at mailman.qth.net] On Behalf Of Ken Downs
> Sent: Wednesday, July 29, 2015 1:46 PM
> To: MRCA at mailman.qth.net; Ken Downs
> Subject: Re: [MRCA] Chicom Type 883 VHF radio-CORRECTION
>
> Tom, Jeep, and anyone else reading this,
>
> Duh. Brain fart time on my part. My radio is a type 884, not an 883 as I stated earlier. Guess I took stupid pills this morning instead of my usual meds...
>
> I had done some research, and yes, the 884 is the all solid state replacement for the tubed 883 of maybe ten years earlier. I do have the manual, but, as one would expect, it is in Chinese. My 47-week Basic Mandarin course at the Defense Language Institute concluded in December, 1972, and I was not very good with written Chinese even back then. Now ? Forget it! The good news is that the manual includes a complete schematic.
>
> If no one on the list is interested, I will probably take it to Nearfest in October and try to get some of my investment back. Someone may be interested in it as a non-working example of military radio, or perhaps a man-pack for a child who likes to play army. Whatever.The case could be used for a better radio (or doorstop ?). When I saw it for sale at the military vehicle rally in Weare, NH Saturday, the push-button cw "key" and Vietnam memotries of the Chinese K63 with which I am familiar made me think it might be an hf radio, so I jumped at it without much thought. Ah, impulse buying.
>
> Win some, lose some.
>
> Ken, W1KRT
>
> On Wed, 29 Jul 2015 08:10:41 -0400, Ken Downs <krtdowns at myfairpoint.net> wrote:
> This past weekend I picked up a Chinese army backpack radio. It looked interesting, came with a bunch of accessories, and was priced right, so I took a chance inspite of not knowing anything about it. It turned out to be a type 883 VHF (45-50 MHz) FM/CW rig made in 1974. The model was used 1972-1980's and is all transistorized - no tubes or ICs.
>> Anyone have any experience with these radios? The receiver on this one
>> sounds live, but does not receive anything. The TX also has no output.
>> I replaced the T/R relay (it came with spares) but still no joy. At
>> this point I suspect the LO or something in the multiplier chain. Any
>> suggestions?
>> Worse come to worst, the great little case could be used for an HF QRP
>> radio. Thanks and 73,
>>
>> Ken, W1KRT
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