[Premium-Rx] Premium-Rx Digest, Vol 62, Issue 5

[Hans]

hi Pat

Seems to be we are one of the view owning a RA1779. I do not have a 
spare transformer but I wish you goodluck in repair. My rx works great 
and was owned by the dutch coastgard. Some repair done on the keyswitch 
on front and replacing the memory battery. Because I did not have the 
FSK board I have fitted the USB filter for LSB use in the 1 Kc slot. 
Some hum (mechanical) is heard in the transformer after 1 hour use. 
Excellent 2.4 KC SSB filter.
If you are interested in the pictures let me know.

73, Hans PA1AMS

P.S. now also QRV with funcube Pro in connection with Datong 
up-converter HI!!



Op 16-1-2012 18:00, premium-rx-request at mailman.qth.net schreef:
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>     1. STRANGE RACAL RA1779 TRANSFORMER WANTED (Pat1McA at aol.com)
>
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Sun, 15 Jan 2012 13:27:33 -0500 (EST)
> From: Pat1McA at aol.com
> Subject: [Premium-Rx] STRANGE RACAL RA1779 TRANSFORMER WANTED
> To: premium-rx at mailman.qth.net
> Message-ID:<c0ca.3d0f5577.3c447495 at aol.com>
> Content-Type: text/plain; charset="US-ASCII"
>
> Greetings to All ,
>
> This request is an absolute,  total, longshot....
>
> Today had a late model RA1779 Receiver  come in for repair.  Fault - will
> not read or write to memory.
>
> Traced to Transformer T2 which converts the normal AC PSU voltage up to
> -28v for the Memory Board.
>
> This Transformer has shorted windings on the Primary. It is  designated  T2
> B78272.  Issue 3.
>
> Has anyone out there got a scrap/useless RA1779 lurking with one of  these
> transformers still in it?
>
> Does anyone know the original spec?
>
> I have a feeling that it has a 1:1 ratio and is just used for  completely
> isolating the (negative) supply.
>
> Many thanks!
>
> Please reply offline,
>
> Pat G3YFK
>
>
>
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> End of Premium-Rx Digest, Vol 62, Issue 5
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