The problem for the loss of sensitivity in receive mode was K3 on the
input board. It is a Coto 8401-12-100 relay which is no longer available
or very expensive nowadays. Contacts were dirty and i could measure a
resistance between the closed contacts which caused the loss of
sensitivity. As i didn't have a substitute at hand I used the KB relay
(same 8401-12-100) which is normaly used to switch in a resistive pad
to avoid a overdrive condition as substitute for the K3 relay. The
defective K3 is now in the position of the KB relay. Whenever a
overdrive situation occurs the KB relay will be activated and the RF via
the contacts on its way to the resistive pad will clean the contacts, hi.
vy 73
Wolfgang
dk7cy
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