💾 Archived View for gemini.spam.works › mirrors › textfiles › hamradio › MODIFICATIONS › pcs40001.ha… captured on 2022-06-12 at 09:05:41.
-=-=-=-=-=-=-
PCS4000.1
The five second scan resume delay
is sufficient to prevent scanning restart on momentary signal
fades and no signal periods between transmissions of different
stations in a net or in a roundtable. The modification is
fairly simple, requiring the installation of a single diode on
the receiver board.
"Place the set upside down on the bench and remove the
bottom cover. Remove the cover slowly so as not to yank the
speaker wires loose from the PC Board. Locate IC303 near the
front of the receiver board. It can be seen at the lower left
of the photo on page 14 of the Azden PCS-4000 Manual, with the
arrow running from (A), running across it. Pins 3,4, and 5 of
IC303 are tied together on the PC Board. Connect the Anode of a
1N914 or 1N4148 diode to one of these pins. Pins 9 and 10 of
IC303 are tied together on the PC Board. Connect the cathode
end of the diode to one of these two pins. Take care to make
the solder connections as rapidly as possible to minimize the
amount of heat conducted from the pins into the IC.
"Replace the bottom cover and enjoy." That's all there is
to the modification. Have fun with your new modification.