[Milsurplus] TCS receiver

[Michael Kane]

I have used a TCS13 combination on the Australian 7125khz net for over
eight years. Regarding barn door IF bandwidth, I made a copy of the Collins
plug in 353A crystal filter module with 6BA6/6AU6 and filter of choice.
Fixes bandwidth problem, and no mods to RX. The original carbon mike audio
left a lot to be desired, found a good electret mike and amplifier
schematic on a French telephone website that plugs into the mike socket on
TX. I get studio quality audio reports. The circuit I use rolls off under
300hz and top limit around 3.3khz, and again no mods to TX.
The TCS series is a great way to get on AM, I have found mine to be
extremely reliable with only a 12A6 failure in the TX, the receiver makes a
few noises for the first sixty seconds, and then will run for hours with no
issues at all. Will look into this one eventually.
A final request, my receiver had the original audio OP transformer removed,
with a substitute speaker tranny hanging on one screw . As I use the remote
control head with internal speaker, I wired up an MN26 audio tranny which
works perfectly, but of course won't fit. It lies in the crystal bay.
Anyone got a spare transformer, or a good close up photo I can post around
to help me look for one.

Thanks...Michael VK4ZKT
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