• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Need recommendation...

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LafeEric

LafeEric

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Joined 2010
#1
Hello,

I am thinking of making a pair of tube monoblocks, and am hoping someone here could recommend a good generic design of a KT-88 ultra-linear amplifier. I'm sure there are plenty of proven and not too fancy designs around, from those in the know.

I have perfectly serviceable soldering and construction skills, so just a schematic - as long as the iron is available - will be fine. More of course (parts list, etc.) would be fine too.

Thanks so much in advance! 🙂
 
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#2
LafeEric said:
I am thinking of making a pair of tube monoblocks, and am hoping someone here
could recommend a good generic design of a KT-88 ultra-linear amplifier.
Click to expand...

Here are specs on Dyna's transformers. http://www.triodeel.com/images/dynaxfmr.pdf
New transformers: DYNACO Replacement Transformers - MADE IN USA
New transformers: Transformers
Some manuals/schematics are here. http://www.dynakitparts.com/manuals
ALso the RCA tube manual is good. http://www.tubebooks.org/tubedata/RC30.pdf
 
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#8
LafeEric said:
Hello,

I am thinking of making a pair of tube monoblocks, and am hoping someone here could recommend a good generic design of a KT-88 ultra-linear amplifier. I'm sure there are plenty of proven and not too fancy designs around, from those in the know.

I have perfectly serviceable soldering and construction skills, so just a schematic - as long as the iron is available - will be fine. More of course (parts list, etc.) would be fine too.

Thanks so much in advance! 🙂
Click to expand...
Bob Latino has a couple of first rate kits assembled. http://www.tubes4hifi.com

Sent from my HP 10 G2 Tablet using Tapatalk
 
#9
Thanks so much for the great responses! 😀

I hadn't thought about using a kit, but I have to admit the Dyna(semi)clone kits look pretty sweet, especially Bob's Mk III. That is a real contender.

However, I also really liked the link to Pete Millett's designs. I especially like the idea of solid state regulation, such as with his 'Engineer's Amp'.
Engineer's amp 50W monoblock

All replies much appreciated. Anybody else?
 
#10
There's TubeMack’s Soloist 88 Amplifier from this site (IIRC) and Kara Chaffee of deHavilland Electric Amplifier had a Dynaco MkIII mod in AudioXpress Mar 2001. And the Poseidon amp from diytube.com. Triode has the boards for this one.

And Bob Cordell's KT88 from Linear Audio Vol. 2. edit -- it's a pentode-connected KT88 design.
 
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#11
PH104 said:
There's TubeMack’s Soloist 88 Amplifier from this site (IIRC) and Kara Chaffee of deHavilland Electric Amplifier had a Dynaco MkIII mod in AudioXpress Mar 2001. And the Poseidon amp from diytube.com. Triode has the boards for this one.

And Bob Cordell's KT88 from Linear Audio Vol. 2. edit -- it's a pentode-connected KT88 design.
Click to expand...
Having trouble researching those.

Links with any suggestions would be very much appreciated. 🙂
 
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