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Old 19th October 2007, 10:03 PM   #1
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Default What Would You Do?

just wondering about your opinions. I'd like to build some kind of triode PP amp but it seems like I have too many options. Here's a list of all the tubes and parts I have, do you see something that immediately stands out as a good idea?

OPT's: 10KCT/8R ~15W, no UL taps (from a Hammond organ)
PT's: 35VA Triad isolation transformer (U-mount)

Tubes:
8 6S19P's
4 6P9 (6AG7 Equiv.)
6 6AG7
4 12B4's (not well matched)
5 5687
6 5763 (12W noval sweep tube)
2 6SL7 (Russian 6N9S)
4 6P14P (EL84 Equiv.)
2 6AY3 + sockets (damper diodes)
6 6CM7 (1/2 a 6SN7, 1/2 6W triode)
2 6J5

I've also got 2 6SF5's, 2 6SC7's, and 5 or so 6SN7's but I might use the 6SF5's in a rebuild of my monoblocks..
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Old 19th October 2007, 11:54 PM   #2
Jeb-D. is offline Jeb-D.  United States
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For starters:
You will have to use that isolation transformer as a voltage doubler if you want to get any power out of that 10k OPT.

So, we will have roughly a 340-310VDC supply to work with.

Mmm..will have to give it some thought.

Perhaps Class-A push pull 6P14P

A guitar amp or mono Hi-Fi?
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Old 20th October 2007, 12:27 AM   #3
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I included the isolation transformer as an option for maybe a driver stage or something, especially with a low B+ for the 6S19P's. I'm not averse to buying a separate PT.
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Old 20th October 2007, 12:33 AM   #4
Jeb-D. is offline Jeb-D.  United States
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Oh, I was thinking of it as build an amp out of the parts you already had. My bad
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Old 20th October 2007, 01:38 AM   #5
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well, using as many of them as possible would be nice for monetary reasons
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Old 20th October 2007, 05:08 AM   #6
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The OPTs suggest the EL84s for the outpit stage. I'm partial to Class A triode with these but you could run in pentode up to the limits of the OPT.

You'll need a filtered 250-300V.

And 2 dual triodes for a LTP frontend, a little more tube versatilty with a voltage stage + concertina....

dave
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