The 6V6 is a great tube, 6L6's don't play in the same category. EL34 might also be good but too much filament current and big size makes it a non ideal candidate. I seem to remember a 6AS7 doing preamp duty, now that is weird.
What do you think about 307 dht tetrode?
Low cost,lesss power than 300b and very linear?
CIao
Guglielmo
Low cost,lesss power than 300b and very linear?
CIao
Guglielmo
Thank you! Nothing personal, but that is how threads get so long that no one wants to read them. I already feel bad for the clutter I have caused. Feel free to delete non important discussion, mine included, as this is a specific build thread that is relatively short at the moment.
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I recently ran into a situation with my transformer coupled 26 line stage where the "improvements" in a particular regulator design which measured spectacularly well also made quite a footprint on the sonics - which in this case resulted in a spectacular compromise in sound quality. It may be the case that once the source impedance is down to a few tens of ohms you start to hear the regulator and not the capacitor across its output terminals. (A good compromise seems to be when the regulator dominates the source impedance up to a few hundred Hz and then the cap(s) take over.) I don't think this is an issue with RC coupled circuitry at all, but it is quite interesting with transformer coupled designs. The supply in question is a series pass with 6V6 series pass in pentode connection with a cascode 6DJ8 error amp with a zener reference.. I've had some luck with CCS based designs and am going to revisit the shunt thing soon.
I see no problem, we're not talking about cars. Interesting comments by Kevin about regulators.
I won't ruin Anatoliy's fun, but you'll like the answer.. 😛
Edit: Wow, simultaneous post.. 😀
Do you think Salas should be interested in 4P1L as well?
Edit: Wow, simultaneous post.. 😀
Do you think Salas should be interested in 4P1L as well?
I've got some slated for a small SE power amp..
I also have 6P15P, these in addition to the 4P1L I seem to recollect were bought on your advice.. One of these days I will get around to doing something with them.. 😀
That is a great one in triode, maybe better than EL84 itself that its supposed to be the Russian alike, but has 3 times the gm of 6V6. Will give much gain for useful line pre with today sources I think.
IIRC the 6P15P is similar to the 6CW5/EL86, but I don't recollect the 6CW5 being quite that linear - although it has a lot of fans based on its sound quality.