[1000mp] Roofing filter

[Steven J Fraasch]

Mike:

I think you'll need to decrease gain, at least that is what a few of us
did.  The INRAD instruction advices leaving it alone (if the 70 MHz mod
was not done before), but my roofing filter added about 6 dB of gain;
therefore I reduced it.  I believe my menu 9-1 setting is "9".  Tim, K3LR
recommended setting it so that the S meter is the same as that of the sub
receiver.

My stock radio came with 9-1 set to "13," I believe with the roofing
filter the front-end gain will be too high, and you will sustain loss in
IP34 and blocking dynamic range.  I usually operate my MK V in the IPO
position anyways; therefore, the extra gain would be unwanted.



On Sat, 04 Jun 2005 09:21:47 -0500 Mike Kasrich <aj9c at indy.rr.com>
writes:
> I read a message this morning  and was wondering if I read it 
> correctly.  Ive installed the roofing filter.  The instructions say 
> to 
> increase the value of 9-1  2 notches.  Did I read correctly the 
> value is 
> supposed to be decreased?  I increased the value till the s meter 
> between the sub rx and main read approx equal.
> 
> mike/aj9c
> 
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