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Thorsten,
For a some time now I have dilema with dual channel SET . I strongly consider Melequiades but I'm much closer to 300 B amp as I already have EML 300b (200HZ up) and KR300BLX (~15W bass) .I have very good 5k trans for mid-high channel and dedicated LF (2.5k) trans are in a way. I though of Katelelo amp but there would be lots of stages and tubes , also since I've got some WE 717a Yamamoto schematic comes to mind with DC filament and fixed Bias . I have nothing against SS rectifier (Creek or other hexfreed )big cap reservuar 500 -600uF, fixed bias and DC on filaments. I already have hefty PSU .I cured myself from "audiophilia" and want the amps to be true to the source material. I use TVC (TX-102 I version) as preamp and 103 db horns .What do you think?
Regards, W
Follow Ups:
Hi,Okay, I hear you. But is it that you would like my opinions/views on?
Hehe, sorry T, I guess I deserved that;)
And yes I wanted to know your opinion in general and advice for practical circuit(where to lay a line of compromise ? )I realize now that most circuits will do ,although Reichert's "F@B" I'm running now is maybe not a best choice for Bass channel with KR300BLX.
Best Regards, Wojtek
Hi,I would probably use something along the lines of the Circuit still posted with my System at Adnan Ardumans site, which discouning the WE connected self biased output stage with gridchoke (which I prefer having tried fixed bias and this approach and which Roman never tried) and the fact that the input stage uses self bias, rather than this unusual, interesting but cludgy DC coupling is not that far off topologically from the Melq. You could even use 6E5 in that circuit.
Thanks,
Looks good ,I'll try it out with conventional PSU .How about fixed bias 420V, -90 for Bass channel and grid choke cathode bias for mid-high channel. (360v -60). Did you try Creek rectifires already ? I have a pair of WE422a rectifiers (GZ 37) to try too.
Regards, W
Hi,> How about fixed bias 420V, -90 for Bass channel
I find that self bias, WE connection and Gridchoke are a better choiuce ESPECIALLY for the bass. There are reasons, I posted previously an analysis....
> Did you try Creek rectifires already ?
No. There are reasons to use valve rectifiers even with switching noise free rectifiers, though these properties can be simulated using other passive components, but I think Valve Rectifiers look cool and make designing good sounding gear the DIY Way much easier.
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