I have had a half completed Tubezone version of this amp for years. I decided to pick it up again and finally complete it. Yes, I am aware of the "search" function.
The kit is obviously designed around the z565 transformer which has two secondaries. The unused secondary is used for the negative feedback. If you use an OPT with a single secondary, does the feedback use the same secondary as the speaker output?
The instructions states "connect the screen power supply to all the connectors labeled "UL Tap" " when using an OPT without screen taps. So, where does one find this screen power supply source on the board?
I was originally going to use the transformer set from a scrap SCA35 but I have determined that one of the OPTs is bad. I don't know the condition of the power supply transformer. I really don't want to try to score another vintage transformer from eBay to match my "good" one.
I have other transformers available for use. Some have multiple outputs and some have UL taps. None have both. My inclination is to use a pair of Edcor CXPP60-8-10K outputs with an Edcor XPWR005-120 power transformer all of which I have in my stash. The Edcor OPTs have the UL tap but a single secondary.
Thanks in advance
John