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RE: Small IDHT tube cathode bypassing

Posted by drlowmu on July 6, 2015 at 15:15:45:
Hi,

But isn't there a huge disadvantage, that you have to add a series coupling cap in the signal path. Not only that, its placed at the lowest signal level of the entire amplifier.

I build two stage DC amps because I want to eliminate all caps that are in series with the signal path. Sure sounds better to me than ANY cap couple SET amplifier !!

If you have to bypass an Rk with film caps, that is not any disadvantage at all. Its an advantage.

You can select the best caps, plural, and get the amp to play exactly the way you want it to, in EVERY range, at the speaker voice coil, and to your ear, where it counts the most.

Of course, you have to experiment and listen, and TEACH YOURSELF how to bypass properly, what values and brands work best.

Quality - wise, Dennis tells me in 7-2015, Mundorf Silver and Oil has an entire line up of values, that will do the job. Usually, I experiment, even snuck in some Russian surplus caps here and there. Dealer's choice !!

No, my fellow hobbiests, having an Rk to bypass can be a BIG advantage, if you teach yourself how to do it well ! Yes, it costs, but it costs more to fumble on an amp, and never get it to perform at a certain level. I'm getting too old to be listening to mediocre amps, its gotta please me, its the WEAK link in the High Efficiency audio chain, at least 98% of the SETs out there are mediocre in my opinion.....

Jeff Medwin