No I did not have one so I ordered one from some obscure company called Tube Town?
New OT arrived and performing the test from
http://www.marstran.com/Measuring%20Primary%20Impedance.htmgave really different results:
- when connecting the looper to the OT input wires blue and brown the output did not drop like with the old one, so I could keep the 1 VAC.
- input 1000mVAC, output between pins 4 and 6: 24 mVAC
- this gives a VTR of 42 (old one 193)
- Imp ratio then is 1764 (old one 37249)
- multiplied by 6 (pin number) gives 10584 as a primary Impedance (old one 233k)
So I had good hopes on going to use this new OT, and indeed now the Emma works as to be expected!
17VAC on the input of the ECC99 gives 95VAC out.
Both sides perfect sine in counterphase and signal to speaker is 4,8VAC.
Seems like I can pick up the gitar again instead of scope and soldering iron and finally get to experience that so called tube sound!
Pfffffft.... It has been a long ride. But with a steep learning curve which you do not get when first time right!
Thank you to the supporting members!