[1000mp] Modifying The INRAD roofing filter board.

[Mike Schatzberg]

Hello Noel:

I hope the information I posted will help you.  I have received other
comments on the success of the roofing filter board modification, but this
one from the Contest Group of Quebec forum seems pretty straight forward.

It worked well under contest conditions, when previously, before the
modification was added, intermod was a big problem in an earlier contest.

73 and Happy DXing,

Mike
W2AJI
----- Original Message ----- 
From: "VE2FWW" <ve2fww at globetrotter.net>
To: <1000mp at mailman.qth.net>
Sent: Sunday, January 27, 2008 8:38 PM
Subject: [1000mp] Modifying The INRAD roofing filter board.


> Hello
> I wonder if anybody in this group had modified the INRAD MARK V OR FIELD
roofing filter board.
> I read the informations on W8JI website.
> This mod is done to keep proper input impedance  for loading the filter
> There are two resistors to be changed on the INRAD board....R5...which is
a 12 Ohms ...replaced by a 15 Ohms....and R6 which is 220 Ohms...replaced by
a 150 Ohms...
> I would like to know if anybody performed this mod on the INRAD Board....
> I have Inrad Roofing filters in my Fields ...and it would be interesting
to know the difference between the MOD and the NO MOD????
> Any input would greatly appreciated...
> Thanks
> NOEL ve2ryy
> ______________________________________________________________
> 1000mp mailing list
> Home: http://mailman.qth.net/mailman/listinfo/1000mp
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:1000mp at mailman.qth.net