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JackD201 wrote:Hi Jon
Nice amp! Which tubes are you thinking of replacing and what sound are you after?
JackD201 wrote:Ahhh it's a KT120 and 6H30 based amp. AFAIK only Reflektor is making KT120s although that may not be the case anymore. As 6H30's go the only other option is the supposedly better DR variant again only as far as I know.
jon_p wrote:Hello ws members.
thinking of replacing the tubes of my arc vsi60 int amp.
Any recommendations?
Tia!
jon_p wrote:Sir(s)...jack, jadis, dafos...
Many thanks to your replies.
seems like i need to read on "tubes 101" to get a better understanding on tubes and their corresponding charateristics.
pardon my ignorance...
given the stock tubes on my amp, what tube upgrade do i look for?
the big tubes give the power and small tubes define character?
should i look for 6922's?
i also asked caloy and he recommended the same.
tony wrote:depending on the circuit, but 6CG7 can drop in, in place of the russian 6H30
so with the 6922/6dj8 variants, since they all share the same pin-outs
most likely these will work.....small tubes are always operated at a fraction of
their specs and so live a longer life compared to power tubes....
the 6N30 will have more gain than the 6CG7, but the 6CG7 is a 6sn7 in a small bottle....
the 6922, 6dj8 and siblings will have the same gain as a 6N30 but is lower plate dissipation ratings...
re KT120/150, not a big leap from the kt88, for the price...
jon_p wrote:Jadis,
So far so good for the power tubes. what signs/sound defect am i suppose to hear?
jon_p wrote:tony wrote:depending on the circuit, but 6CG7 can drop in, in place of the russian 6H30
so with the 6922/6dj8 variants, since they all share the same pin-outs
most likely these will work.....small tubes are always operated at a fraction of
their specs and so live a longer life compared to power tubes....
the 6N30 will have more gain than the 6CG7, but the 6CG7 is a 6sn7 in a small bottle....
the 6922, 6dj8 and siblings will have the same gain as a 6N30 but is lower plate dissipation ratings...
re KT120/150, not a big leap from the kt88, for the price...
Thanks for the reply sir.
Several choices u mentioned above. Wc do u recommend?
jon_p wrote:thanks jadis for the tips.
jon_p wrote:Thanks tony. Will look around for tubes.
Any recommended sellers?
Just checked the kt120's...
All have burn marks already!
Maybe just in time for my querry here in the forum as i may need replacements asap.
jon_p wrote:Pls advise recommended online shops...i will start the research...
Thanks
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