[UK-CONTEST] Inrad Roofing Filter

[Chris Tran ZL1CT]

Hi Chris et al

I've set the IF Gain on my MP to 13dB with the roofing filter installed. I
actually increased the gain by 2dB after installing the board (the
instructions imply that you can reduce the gain slightly) - I listened to a
really weak signal and adjusted the IF Gain to what I think gives the best
S/N ratio, by ear. My MP is deaf on 21MHz anyway.

I know this is old news, but MPs are still seriously noisy radios - in the
ARRL 10m contest (which is a great contest from ZL cos the path to the USA
is surprisingly good) we were using a diversity system with the MP in one
ear and a TS850 in the other - this really showed how noisy the MP is I'm
afraid, even with the new board.

Does the roofing filter board work ?  I think so...difficult for me to do
direct comparisons but in the 2 CQ WW contests I did not seem to have as
much trouble with nearby stations as before.

Happy 2005 to everyone on the reflector and tnx to John G3LZQ for the QSO on
80m !

Chris
ZL1CT/GM3WOJ

----- Original Message -----
From: "Chris Burbanks" <g3sjj at btinternet.com>
To: "UK Contest Reflector" <uk-contest at contesting.com>
Sent: Tuesday, December 28, 2004 3:13 AM
Subject: [UK-CONTEST] Inrad Roofing Filter


> Just installed my filter which nicely arrived on Christmas Eve!
> Be interested to know what IF Gain users have set their radios to.
> Chris G3SJJ
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