Re: [IRCA] Display readout

["Chuck Hutton" <charlesh3@xxxxxxx>]

Caveat DXer. I mounted a PCIM177 in the left side of the "display window" of
my 12-655 and could never get rid of all the noise it generated. I tried
shielding and coax and a source follower and still had a bit of a problem.

In the end I put a toggle switch on the side of the radio to kill the
display when I wanted. I just couldn't give up the PCIM-177 - it fits
perfectly into the TRF if you cut the clear plastic display window a bit.


Chuck
Owner of a digital TRF



-----Original Message-----
From: irca-bounces@xxxxxxxxxxxxxxxx [mailto:irca-bounces@xxxxxxxxxxxxxxxx]
On Behalf Of Nick Hall-Patch
Sent: Tuesday, January 03, 2006 10:33 PM
To: Mailing list for the International Radio Club of America
Subject: Re: [IRCA] Display readout

At 00:00 04/01/2006, you wrote:
>Is anyone using one of these, or a similar readout on an older analog
radio?
>I have a Radio Shack TRF-655 that I want to modify.


Something similar (the PCIM177 from Singapore I believe) was used here on a 
TRF-655 years ago...had to use a buffer from the local oscillator to cut 
down the noise from the display getting back into the radio. Also placed 
the display in a separate metal box mounted to the front of the radio for 
that reason.  Don't know if the AADE generates noise the same way though, 
but it is something to be concerned about.

If you have a very elderly DXer's Technical Guide, 2nd edition, the 
information is on page 92-93, otherwise I can scan you a copy.

Hmm, even better, try IRCA reprint M-031 for the same info plus some from 
Frank Aden and Bill Block.  It's on Lee Freshwater's fine CD of all the 
reprints.

best wishes,

Nick




****************************************************************************
Nick Hall-Patch
Victoria, B.C.
Canada

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