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Old 16th October 2013, 01:25 AM   #51
Einric is offline Einric  United States
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Thank you so much.

It looks like triode mode can have fewer connection errors so maybe I will try changing that also.
I will be working on this more tomorrow night.
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Old 6th June 2015, 07:03 AM   #52
Sprags is offline Sprags  United States
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I know it's been a while since anyone has posted a reply to this but...
Can you recommend an Edcor transformer that is equivalent to the Hammond power transformer? Or if that isn't the way to interpret this can someone tell me which Edcor transformer would work? I read the TubeLab pages and I just don't get it. I'm new to trying to learn electronics...been a Mechanical Engineer all my life. Sorry for the trouble.

Last edited by Sprags; 6th June 2015 at 07:07 AM.
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Old 6th June 2015, 08:31 AM   #53
zman01 is online now zman01  Bangladesh
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Sprags,

This is for a Tubelab SPP build?

2 options I found from Edcor:

https://edcorusa.com/xpwr172

https://edcorusa.com/xpwr131

The Edcor XPWR172 has a lower voltage rating (your B+ likely to be slightly lower), but is rated for 200mA vs minimum George's minimum recommendation of 175mA.

The Edcor XPWR131 has voltage rating of 660v which is slightly higher than 650v mentioned by George, and the current rating is on par at 175mA.

6.3v and 5v rails are adequate for both of the transformers.
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Old 6th June 2015, 08:36 AM   #54
cjkpkg is offline cjkpkg  United States
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Check this thread post #9 in particular...it is my el84pp amp...not the simple pp but specs should match. This amp holds the voltages nicely.

Anyone ever made the EL84 P-P circuit referenced on the Tubecad Journal site?
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Old 8th June 2015, 12:17 AM   #55
Sprags is offline Sprags  United States
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Thanks for the link cjkpkg. Einric has been good and we've been communicating about this and perhaps a SSE build.

I think I'm going to stick with the SSE build for now.
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Old 8th June 2015, 07:16 PM   #56
zman01 is online now zman01  Bangladesh
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The SSE is a sweet sounding amp and also a slightly easier build that the SPP.
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Old 20th June 2015, 01:53 PM   #57
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If you still have problems with hum, make sure that your top plate and bottom plate are both connected to the same ground. That solved my hum problem with my TSE 300B. Was driving me crazy and one little thing changed everything.
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