Meng Yayi KT88 MonoBlock

[peejay1959]

Just bought a pair of these and am quite pleased with them, good seperation, but the sound is a liitle dull compared with my old quad 405 so as with all chinese tube amps I feel there is a better amp lurking inside!

Does anyone have a schematic for these? Or, any experiance of mods for them. Lampizator hasn't done them yet....

Pete

 

[sgbhandi]

Hey,
I recently brought this amp. The initial sound was bad.Did lot of changes, replaced KT88 with EL34 then changed LTP splitter to Cathodyne . Finally I tried phase splitter from Magnavox Paraphase 15 wpc P-P Amplifier , boy I hit a jackpot, just try it you will be amazed at the sound quality!.

Regards,
Santosh Bhandiwad

 

[CT7ABI]

Hello my friend! Do you have a schmatic of the 2 monblocks or you can give a schematic the upgrades.you did? Best regards, Fernando Roque

Hey,
I recently brought this amp. The initial sound was bad.Did lot of changes, replaced KT88 with EL34 then changed LTP splitter to Cathodyne . Finally I tried phase splitter from Magnavox Paraphase 15 wpc P-P Amplifier , boy I hit a jackpot, just try it you will be amazed at the sound quality!.

Regards,
Santosh Bhandiwad

 

[6A3sUMMER]

sgbhandi,

Do you have a digital scope with an FFT function, or do you have a computer that has a sound-card and software to do spectrum analysis?
Or, do you have a friend nearby who has either one of those?

I would be interested in what the relative levels of the 2nd and 3rd harmonic distortion products of your modified amplifier are.

Just a guess, but I bet your original unmodified amplifier had dominant 3rd harmonic distortion; and I bet your modified amplifier may have dominant 2nd harmonic distortion.

Let us know if you can perform the test.

 

[ontariomaximus]

sgbhandi - I also wouldn't mind seeing a simple schematic for yours. Am just about the read the link, but is used for EL84's