[Milsurplus] [Boatanchors] TCS Receiver Question - USS Wisconsin Radio Club

[David Stinson]

Which version?
How far are you along in the restoration, Bill?
Cap and resistor changes yet?
I've done strip-down rebuilds on three of
these and they are excellent once done.

> Guys,
> I'm working on a TCS receiver for the Wisconsin....tracking 
> down the loss of screen voltage on the RF Amp V201.

Assuming a version later than TCS-8/

Do you have B+ voltage on V202 pin 4 and screen
voltage on V204 pin  6?  If not, you need a jumper
on the main power connector between pins 2 and 3.
These are the muting contacts.

If you have B+ on V202 pin 4 but no screen
voltage on V201 pin 4 or V204 pin 4, disconnect
C205B and see if you now have screen voltage
at these points.  If so, C205B is shorted.  If not,
R217 and/or R231 are open (which will happen
if C205B shorts).  This assumes no wires have
been hacked or whacked by a previous owner.

With the rear and bottom of the radio facing you,
C205 is the one nearest V201 and B is the connection
on the left.
The left-hand module closest to the rear is IF#1.
R217 and R231 on on the vertical mounting
board.  R231 is the one mounted diagonal
and 217 is the one mounted straight on the
back of the board.

73 Dave S.