The Amp Garage

it looks like transformer made by Heyboer

Did you maybe try V6.2 version?

You have something lake that: Boss Waza TAE

more pictures

no schematic available, as I know
check the picture for internals

check here

If put all the results in this online calculator step-down ratio looks OK
https://www.hagtech.com/loading.html

If I apply 400hz AC signal 1V RMS on secondary, on primary I'm getting 26.65V RMS, so it should be OK with 6.5K/8R relation

With 1Khz C settings and from Ub+ to secondaries I'm getting 1440pF

understand that, but is the same like inserting voltage on primary and measure sec. , calculate by hand? did you check and confirm ? :P put 1khz C setting and try from Ub+ to secondaries.. should be around 1-5nF if is good trafo, if doesnt measure try via normal multimeter, on C selector, usually i...

hi neskor, can you explain what exactly you are measuring = 6.5k ohms here? when you have this trafo on hand , how much is parasitic capacitance between P and S? any tap is ok 6.5K is primary impedance with 8R on secondary I tried to measure parasitic capacitance between P and S but results vary to...

Roe wrote: ↑Sat Oct 14, 2023 7:52 am on the 15 ohms output arrangement, not the 7/8 ohms out?

it is measured on 8 ohm tap with 8R resistor on secondary

[/quote] Have you checked the high frequency to ultrasonic frequency and phase response of your’s? Mine has a weird resonant peak and phase shift around 40kHz. [/quote] I didn't I don't have balanced signal generator, maybe runing the secondary with SG and solid state amp will work, but never tried....

maybe something like this