Weird Tape Deck Problem

I have been working on a long term project to convert my (and my Father’s) old reel-to-reel tapes to digital. As part of that I have been working on a Teac X3mkii deck. Skipping all the mechanical fun, at this point it is pulling tape very nicely (for a consumer deck) and I was impressed with the 8 KHz stability coming off of the MRL alignment tape. The purpose of this post to search for an answer to an electrical problem with the deck. The problem is ion both channels, but much more pronounced in the right. There is an...