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Need 15 watt plus SET design for DIY? [message #11229]

Thu, 13 October 2005 09:32

Norris Wilson
Messages: 361
Registered: May 2009

Grand Master

Hi everyone,
After retinking my previuos request for a 20 watt SET design.
I realized that I am asking for the impossible when I excluded an 845 and VV52 from the design, or the EML 520B.
If anyone can help guide me to any good SET designs that are capable of getting 15 watts or greater, it will be greatly appreciated?
Any output tube will be considered for use, triode, tetrode or pentode.
Thanks
Norris Wilson

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Re: Need 15 watt plus SET design for DIY? [message #11230 is a reply to message #11229]

Thu, 13 October 2005 15:23

akhilesh
Messages: 1275
Registered: May 2009

Illuminati (3rd Degree)

Try a parallel 300b: 18 watts.
OR any parallel Pentode design, wired in triode mode: like an el34...should give you plenty of power!
-akhilesh

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Thanks Akhilesh (NT) [message #11231 is a reply to message #11230]

Thu, 13 October 2005 15:25

Norris Wilson
Messages: 361
Registered: May 2009

Grand Master

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KT-88 E-Linear... [message #11235 is a reply to message #11230]

Fri, 14 October 2005 10:12

PakProtector
Messages: 935
Registered: May 2009

Illuminati (2nd Degree)

From Pete Millett's AudioXpress article, an E-Linear rigged KT88 will deliver the goods. At least to within a hard to measure difference in power.

Of course, a PP E-Linear amp would be my choice to deliver the power, but you asked about SE...This is about te simplest and sweet sounding circuits I can think of. Pete confirmed it works as well for SE as I hae found it for PP.
cheers,
Douglas

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Thanks Douglas, looks good! [message #11236 is a reply to message #11235]

Fri, 14 October 2005 13:02

Norris Wilson
Messages: 361
Registered: May 2009

Grand Master

This may do the trick, but it is up to my friend to figure that out.
I was wondering about the parts quality given in the project list.
Do you feel this should be built as specified, or should boutique parts and transformers be substituted to obtain the last degree?
I have not seen much mentioned about the James transfomers, but they look to be affordable, any input there?
Any and all suggestions to get the most out of this circuit will be greatly appreciated, with in a buget of $1200 or so.
Thanks
Norris

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Re: Thanks Douglas, looks good! [message #11237 is a reply to message #11236]

Fri, 14 October 2005 13:51

PakProtector
Messages: 935
Registered: May 2009

Illuminati (2nd Degree)

I don't have any experience with James OPTx's. I have heard good things from folks who have used them, and they are way above certain other allegedly 'custom' in my book.

I would generally stay away from boutique parts, and prefer instead industrial stuff I can get the full data and specifications on( and interpret the need as best I can to compare to published specs ).

For example:
The plate load resistor only needs two( one for each channel ) so even an expensive one is not going to make a big dent in the budget if youy spend $6 each....

You can contact Pete for direct assistance( I would hope ), and discuss it with him. Or you can call me, as I speak faster than I type.
cheers,
Douglas

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Contact info? [message #11239 is a reply to message #11237]

Sat, 15 October 2005 15:32

Norris Wilson
Messages: 361
Registered: May 2009

Grand Master

Hi Douglas,
Here is my Email address: nwwdlw@netzero.net
Would you please contact me about a phone discussion about the
E-Linear ciruit?
If I do not get back with you right away, I will be gone most of the week starting on Sunday. Otherwise, I will get back to you as soon as I return.
Thanks
Norris Wilson

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