ELEKIT TU-8200R

[peter__l]

I will email. What is your address again? I lost my email address from which I last emailed you. Long story...

My output tubes are original Genelex KT88s. I have three or four other output tubes I can try, including RCA 6L6GC, but I do really like the KT88s.

 

[vkung]

For sure one of the the FET damaged
You need to test your output tube or buy a new pair 6L6GC

 

[peter__l]

Does it move with one of the tubes if you switch them from left to right (one pair at a time)?

I haven't tried that yet. I will tomorrow-tonight is KMNO night.

 

[peter__l]

For sure one of the the FET damaged
You need to test your output tube or buy a new pair 6L6GC

I am not sure I understand this. Are you suggesting the output tube can damage the FET?

 

[vkung]

Yes
Info@vkmusic.ca

 

[peter__l]

Ok. Thank you.

What about the driver tubes?

 

[Gruesome]

Victor, is it safe to put a new (or different) output tube in, or can the damaged FET also damage a new tube? (The FET is part of the bias regulation circuit, right?)
(Correction: the FET is part of the ripple filter in the anode voltage circuit, not of the automatic grid bias adjustment circuit.)

 

[vkung]

the drive tube will not damage the FET
You must replace the FET ti solve your hum issue