[TMC] SBE-9 question

[Nick England]

FWIW department - Here's a photo of my SBE-9's phase shift circuit
board located near T127. The toroidal xfmr is clearly not original but
I don't know what the original was actually like (TMC TF228K15 4.7mh
pulse transformer). Anyone? anyone?
http://www.navy-radio.com/xmtrs/tmc-comp/sbe9-phase-01.jpg
cheers,
Nick K4NYW

On Wed, Jan 25, 2012 at 7:59 AM, Nick England <navy.radio at gmail.com> wrote:
> So last night I went belowdecks (Navy radio gear is in the basement)
> to see what was happening with this AM isssue and the carrier phase
> shifter. Found the phase control but tweaking it just caused a
> reduction in carrier insertion and no phase change - huh? So started
> hooking up the scope to the components in that circuit with more
> puzzling results. Ended up unsoldering the little add-on board and
> found out that at some time the transformer had been replaced and
> miswired. So I wired it back and now I get some shift but there is
> sizable 250kc signal loss here - maybe I guessed wrong about the xfmr
> leads. The replacement is a (homebrew?) toroid, where the manual has a
> TMC pulse xfmr part number. Maybe it never would work as "repaired".