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Old 3rd December 2012, 10:57 AM   #31
tinitus is offline tinitus  Europe
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6V6, EL84, 6L6, EL34...

http://www.single-ended.com/6550SEamp.htm
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Old 3rd December 2012, 11:07 AM   #32
cb5 is offline cb5  United Kingdom
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thanks that looks perfect, do you know what output transformer i should use which is available here?
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Old 3rd December 2012, 11:08 AM   #33
tinitus is offline tinitus  Europe
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that depends on your budget
(btw, Im not experienced tube amp builder)

note, the 7K trafo in shown schematic is connected with 8ohm speaker to 16ohm tap
which basicly halves the 7K to 3K5

but then, how many speakers are really 8ohm
most are more like 6ohm, so.....not easy at all ?
and desctop PC speakers, what are they ?
I have no idea, but 4ohm wouldn't surprice me at all

so, to play safe you might also need a 4ohm tap
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Old 3rd December 2012, 11:14 AM   #34
cb5 is offline cb5  United Kingdom
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Quote:
Originally Posted by tinitus View Post
that depends on your budget
(btw, Im not experienced tube amp builder)
Not a lot! I cant afford 'audiophile' transformers
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Old 3rd December 2012, 11:23 AM   #35
tinitus is offline tinitus  Europe
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with trafos, shipping can become a really expencive part
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Old 3rd December 2012, 11:27 AM   #36
cb5 is offline cb5  United Kingdom
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Prefereably it would need to be somewhere in europe!
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Old 3rd December 2012, 11:28 AM   #37
tinitus is offline tinitus  Europe
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you could consider a nice simple tube preamp, with a simple chip amp

if you look for scrapped old smaller amps/receivers, you might find a good trafo with voltage suited for a chip amp

btw, have you ever built anything at all ?
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Old 3rd December 2012, 11:43 AM   #38
cb5 is offline cb5  United Kingdom
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Quote:
Originally Posted by tinitus View Post
you could consider a nice simple tube preamp, with a simple chip amp

if you look for scrapped old smaller amps/receivers, you might find a good trafo with voltage suited for a chip amp

btw, have you ever built anything at all ?
Yes i have built 'gainclone's and other chipamps but iv never built a tube amp
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Old 3rd December 2012, 11:53 AM   #39
tinitus is offline tinitus  Europe
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ok
a rough 'low budget estimate', maybe 250(+/-50) GBP

thats why I suggest to start with something that is worth improving
so that you would at least want to keep it longer
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Old 3rd December 2012, 11:54 AM   #40
cb5 is offline cb5  United Kingdom
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Quote:
Originally Posted by tinitus View Post
ok
a rough 'low budget estimate', maybe 250(+/-50) GBP
Yes thats the kind of money i am looking at
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