[Hallicrafters] HT37 problems

[Joseph Trombino Jr]

OK...so now I have RF output on all bands although 10m, 15m, and 20m is very 
low.....40m and 80m just about full output.

CW mode keys rig fine and output same as above.

Have a couple problems remaining:

balanced modulator section:  unable to null out the carrier in the DSB mode.

unable to get audio through the system in USB/LSB mode.

All tubes checked GOOD on B&K 747B tube tester...some replaced with used but 
good tubes to no avail.

Any way to check the Z1 audio phase shift network???  Any replacements 
available???  I recall years ago there was a B&W phase shift network out 
there but can't remember the nomenclature.

Any and all suggestions/comments/speculations/thoughts are welcomed at this 
point.

The Drake2B/2BQ I received last week are working FB.....now to get the 
transmitter on the air for a nice vintage station.

                                            73, Joe W2KJ