A good tube for my SE 5K-8 OPT's - diyAudio
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Old 29th April 2011, 03:31 PM   #1
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Default A good tube for my SE 5K-8 OPT's

I have a set of Transcendar OPT's I bought to use in a SE 6BQ5 amp. Now I feel they may be over kill for 6BQ5's (I'm happy with the Edcor's) and I'm looking for another application.

Any suggestions?
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Old 29th April 2011, 04:21 PM   #2
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well . give us some date abput the xformer . wats, core size, max current etc
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Old 29th April 2011, 05:27 PM   #3
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The spec's are 10Watt, 100ma. Transcendar says both of these are consiverative.
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Old 29th April 2011, 05:30 PM   #4
tomchr is offline tomchr  United States
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300B SE would be sweet. Or 2A3. Or for the more budget conscious, a 6LU8 spud...

~Tom
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Old 29th April 2011, 06:01 PM   #5
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Second the 300b SET - perfect and many designs here
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Old 29th April 2011, 06:28 PM   #6
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307A / VT-225 very good tubes for audio amplifiers

I made one hi-end SE amplifier with 307A and 10Y and it plays really good!!!


I also started one low budget tube amplifier with VT-225 valve but still didn't finish it

Good luck!!!
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Old 29th April 2011, 06:51 PM   #7
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I use exactly those OPTs in my 1625/VT100 Amp. (same as 807;QE06/40;Г807)
See here
Circuit is old fashioned but with local feedback. At least not mainstream like the boring 300B ;-)
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Old 29th April 2011, 07:15 PM   #8
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Quote:
Originally Posted by Troncones View Post
I have a set of Transcendar OPT's...
Those are the output transformers I used on my Tubelab Simple Single Ended amplifier. They are fantastic with triode strapped EL34, 6L6, or KT88 types.

Click the image to open in full size. Click the image to open in full size.
http://i69.photobucket.com/albums/i4...E/P1100376.jpg
http://i69.photobucket.com/albums/i4...E/P1100484.jpg

Last edited by Ty_Bower; 29th April 2011 at 07:17 PM.
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Old 30th April 2011, 02:15 AM   #9
mach1 is offline mach1  Australia
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Quote:
I use exactly those OPTs in my 1625/VT100 Amp.
Hi manta, nice amp.You might want to try running the 1625 cathode resistor directly to ground with the capacitor remaining as is. That way only AC goes through the secondary and you have no DC offset at the output terminals.
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Old 30th April 2011, 03:05 AM   #10
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Default I know you want to roll your own.....but....

Tubelab SE (45 or 300B) or Tubelab Simple Single Ended.
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