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PSVANE Type II EL34 problems (Read 608 times)
hifitubes
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PSVANE Type II EL34 problems
01/05/14 at 06:31:06
 
I'm on my 2nd replacement tube and now seeing bias meters out of balance, and then saw the first arc on this amp using a GZ32.

I think possibly the tubes are unreliable and going into runaway state?



Recommended Operating Conditions(reference value)
class A1, singel tube, fixed bias
Ua(b) …………………… 265 265 V
Ua……………………………250 250 V
Ug2……………………… Rg2=2k Rg2=0
Ug3……………………………0 0 V
-Ug1……………………… 14.5 13.5 V
Ia(0) ………………………70 100 mA
Ig2(0) …………………… 10 14.9 mA
Gm…………………………… 9 11 mA/V
ri……………………………18 15 kΩ
RL…………………………… 3 2 kΩ
Pout………………………… 8 11 W
Dtot…………………………10 10 %

http://www.partsconnexion.com/TUBPT2-76715.html
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Rivieraranch
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Re: PSVANE Type II EL34 problems
Reply #1 - 01/05/14 at 12:31:21
 
That's why I call them "Pissvane."
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Lon
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Re: PSVANE Type II EL34 problems
Reply #2 - 01/05/14 at 16:24:46
 
Grin
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