[Bazz4CQJ]

Regarding the osc transformer, I've just figured out in recent days that we can get measurements from it without removing it from the board (i.e. de-soldering 4 connections and one hunky retaining tag).

On the primary winding, one connection goes to ground and one connection goes to one of the preset pots. The layout will permit taking a scalpel to the track that goes to the pot, and cut out a ~1mm length and thereby fully isolate the primary and get the measurements.

The secondary winding only connects to the two output tags on the PCB. Put a meter across those tags and you get the readings. I agree that the need to "match" the secondary to the grid circuit, as best possible, is important.

At this point, the gap in the primary track can be repaired.

I may be able to do this task myself quite soon and will keep you posted to try avoid duplication of effort.

B