Jim Shorney wrote:
On Mon, 22 Mar 2010 13:40:20 -0400, Garey Barrell wrote:
By the way, this was resolved in the C-Line by adding one more cable
between the two units, CAR OSC, that carried the Tx CO signal along with
a DC voltage to disable the 3rd IF oscillator in the receiver.
OK, Garey, here's a wild thought. Has anyone ever looked into retrofitting a B
line or older pair with the added CAR OSC magic?
Jim -
Always the trouble-maker......!
My first reaction would be no. In the C-Line, this is the LO in the 3rd
Mixer (not present in the R-4B), after the IF filters, and is a separate
oscillator / buffer circuit. In the B-Line it's in the 2nd Mixer, and
is in a multi-grid (12BE6) Mixer / Oscillator circuit.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
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