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ADA microtube anode power supply problem

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Shiro:
 Hi! I apologize in advance if something is unclear. I use an automatic translator into English.

I bought on Ebay amplifier ADA microtube 200. but he came to me a broken. it was easier to repair it, but do not open a dispute with the seller. 'cause similar lots in the sale was no more.

the problem was the lack of anode supply +170 v. I found and replaced the faulty resistor in the power supply, then the anode voltage appears.

but I suspect that the amplifier is not working properly. no-load voltage is 170 volts, but when connected to the channels of the amplifier voltage drops sharply. up to 20 volts.

question: what should be the anode voltage in good amplifier when connected to the power supply channel amplifier

thanks :)

rnolan:
Hello Shiro, hopefully MJMP and/or Sparker  or others here can help/answer you question  :thumb-up:
Regards Richard

MarshallJMP:
Did you replace resistor R34?

Shiro:

--- Quote ---Did you replace resistor R34?
--- End quote ---

Yes

MarshallJMP:
What is the input voltage (should be around 220Vdc) of the anode voltage?Does it also drop?

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