WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
I just dont have any schematic yet... but the basic construction is the simple cathodefollower with ECC82 / 12AU7, constructed from the usual schematic that have been posted in this forum several times before, and just with small mods/adjustments to get the proper match to my power amp.
-the sound is nothing to be especially excited over, but for me and the budget-gear i use, it was THE difference that i needed to enjoy my music collection.
of course, the joy of building your own equipment, that works good, is more worth than "true HiFi".
I compared ECC82, ECC804 and 6FQ7 in a simple cathode-coupled circuit. The ECC82 was best, particularly RCA. Note that these results will not transfer to a common cathode circuit, as the distortion mechanisms are different there.
BTW radio, the best way to get an answer is to ask a polite question and then wait for a reply.
I wanted to offer a measurement performed on Vacum Tube SRPP Preamplifier With ECC82-Project!
The ratio of the second and third harmonics.
Also i want to see the measured frequency response.
Thanks for your help!
The measurements refer to the preamplifier is given below in Scheme (Figure 1)!
Please someone let that little comment about this amplifier, if it does as a power amplifier.
Feedback to be about the sound and display measurements if it worked.
Many thanks in advance!