Between .500 and 1.6 MHz attenuation is added to reduce? front-end
overload on the Broadcast band. Some of us BCB DXers find this a
HIGHLY undesirable feature. If I want attenuation I will use the
front panel switch. The following mod will restore the sensitivity -
Cut the land between IC1 pin 11 and R7 (SIGNAL UNIT, M54581P)
Cut the trace between IC1 pin 12 and R10
Add a small signal diode (1N914, 1N4148) between IC1 pin 11 and R7
(Cathode towards R7)
Add a small signal diode between IC1 pin 12 and R7 (Cathode towards
R7)
Trace the lands from pin 11 and 12 of IC1 and you will find a good
place (to the left of connector CN5) to cut these traces as well as
pad to solder the diodes to.
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