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Old 10th November 2011, 07:33 AM   #11
jrobson is offline jrobson  South Africa
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Yeah figured you meant that with the flakes, I'll just mix in some black oxide, I'll have to give it a shot and see, hopefully it's okay.
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Old 18th November 2011, 06:40 AM   #12
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Location: seoul
best. build. ever.
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Old 18th November 2011, 06:58 AM   #13
jrobson is offline jrobson  South Africa
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Very kind Sir, thank you very much.
I hope to start it up this weekend, the power transformer just arrived
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Old 28th November 2011, 09:10 AM   #14
jrobson is offline jrobson  South Africa
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Been a bit delayed with problems on the htpc, but now I'm done with almost all the wiring, took longer than I thought
Anyway is there a good guide on how to wire in a pot or attenuator? I assume grnd to R1/L1 and POT out to R2/L2...
And to make sure T2-1/T3-1 = B+ and T2-2/T3-2 = Plate?

Last edited by jrobson; 28th November 2011 at 09:21 AM.
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Old 28th November 2011, 05:07 PM   #15
jrobson is offline jrobson  South Africa
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First go I get B-340 B+285 but the filament on C11 starts at 7.x then drops down all the way....
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Old 28th November 2011, 05:14 PM   #16
jrobson is offline jrobson  South Africa
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Nevermind when I measure the socket I get 4.85
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Old 28th November 2011, 05:53 PM   #17
jrobson is offline jrobson  South Africa
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With the GZ43 in I get +495 and -365...
Sorry for another stupid question but where do I get the negative grid voltage from for the output tubes?

Last edited by jrobson; 28th November 2011 at 06:11 PM.
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Old 28th November 2011, 06:32 PM   #18
jrobson is offline jrobson  South Africa
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I think I am measuring correctly, Pin 1&4 gives -127 both sockets, I'm worried about the +495, it's climbing started initially at +492 but the more I switch the amp on and off the higher it goes, it's up at +497 although seems to have stabalized...
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Old 28th November 2011, 06:44 PM   #19
jrobson is offline jrobson  South Africa
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Okay well I think I'll stop for now, not really sure if there is a problem or not, when measuring output socket pin 1 to ground I get +314v on both sockets... when measuring pin 1 to 4 I get -127...
R14/R25 also gives +314...

I'm not sure what I did wrong any help much appreciated.
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Old 28th November 2011, 07:42 PM   #20
jrobson is offline jrobson  South Africa
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Okay think I found the problem...
R7 is no longer -340v when checked completely tubeless it's now +340v... it's possible that R25 was "bypassed" its larger than the locating holes so they bend backwards and both touched the body, I'm not sure if this could cause something to blow?
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