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'75 Ampeg SVT high voltages between chassis (!)
Can anyone point me where I should address this weird problem: as on the pic, preamp and power amp on the workbench. I'm testing it because something is wrong...
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Sorry - my mistake=, so at the junction (220k) to ground is 54V
PT is original 120V, I am using step down transformer at 122VAC measured now....
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PT original
Heater: 6.7V measured on the power tubes between pin 2&7.
Screen +/- same as PV (475V)
Juction of grid leaks same as PV...
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Thanks!
I lifted two 0,1 caps and still have same issue.
Swapped tubes and it just switched sides. So, not the coupling caps...
...
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5F6A Bassman bias help...
I have a 58 Bassman on my workbench. Changed some dried caps amps is sounding great but one 6L6WGB tube was redplating. I measured and whoah... 88mA on one...
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UK is taxes, custom and expensive shipping. Will try Mouser database too. Well Im looking for cheapest way, because this pot you linked, with shipping and...
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Vox AC4TV power attenuator switch problem
What I have in my hands is 2010s little AC4TV amp with "power attenuator" roatry potentiometer with 3 positions (1/4W, 1W and 4W full power). Switch...
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Effects' power supply resistor burned... need help...
My bandmate "fried" his Ibanez WH10-V3 wah wah pedal by connecting wrong power supply... Smoke came from the wah an when we opened it, a small resistor...
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Thanks! So i I could think of vbuildimng a small amps with all those 6SJ7... ...
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6SJ7 in place of a 6SL7?
Wondering, if I put 6SJ7 in a place calling for 6SL7 (mainly, old ampeg amps), would that work with no harm to the amp? I have about 20+ 6SJ7 tubes laying...
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vintage Ampeg SVT - 12AU7 in place of 12BH7
I'm wondering if I could use 12AU7s in place of 12BH7 (usually microphonic and hard to find or low quality current production) in a vintage (1969-1980s) SVT...
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C53 & C54 looking good around 3NF measured. With unsoldered I dont see any change at all
BUT with 230V voltage connected (and switch at 230V...
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Hey, I covered it on #20 post and explained the mistake, why we get to this for the second time? (those reading from post #10 were with switch set to 120V)...
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Hey Helmholtz - I just wrote it above
It's 1-2 ohms between 2+3
(No other readings between other points)...
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