Jim;
Since I started this message there is one input I would like to make
that I left out of the original.
Per the instruction manual pin 1 (I think) of the audio IC is to be
soldered to ground on both the top and bottom of the board. Sometimes
this is done for heat dissipation, sometimes for noise, and sometimes
for "?" reasons. I tried my unit with and without this pin soldered to
ground. I found no difference in temperature of the IC as measured with
a very good thermocouple, nor did I detect any increase in noise on the
output of the IC using an oscilloscope. However if you want to both
ground this pin and use a socket, that is easily accomplished.
The choice of using sockets in my case was to better facilitate
experimentation and modifications in the future.
Reid, K7YX
______________________________ Reply Separator
_________________________________
Subject: Re: [TenTec] QRP T-Kits and IC sockets
Author: "Jim Lowman" [SMTP:jmlowman@ix.netcom.com] at MSXGATE
To: <tentec@contesting.com>
Date: 8/2/98 10:07 AM
At 03:19 PM 7/24/98 -0700, Simmons, Reid W wrote:
>
>A recent post plus several previous messages on this subject prompted me
>to post this.
>
>I recently built the 1320 QRP CW transceiver and, contrary to the
>sometimes strongly worded advice against it both in the manual and on
>this list, I USED SOCKETS at EVERY IC LOCATION! The reasoning behind my
>"outlandish display of rebellious behavior and a total disregard for
>established practice" was that I HATE to unsolder defective ICs, it
>makes experimental substitutions a snap, circuit modifications will be
>far easier, and... because there really is sufficient room on the
>circuit board to do this.
OK...anyone know what is the conventional wisdom WRT using/not using IC
sockets?
I recall that many of the Heathkits that I built in the 1970s had sockets
supplied for each IC.
I'm one of these guys who will listen to reason, but I hate to see advice
without
some thorough background.
It's just a straight-though connection, and certainly facilitates repair.
Where's the problem?
Thanks in advance and 73 de Jim - AD6CW
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