Elekit tu-8600 Problem

[Eped748]

The Voltage Amplification tubes (1st stage - 12AX7 + parallel drive 12AU7) in my amp jump really bright when first turning on the amp. A second later they are dim and appear normal.

Is this a Normal operation of this amp?

It also is much quieter out of the left channel. Obviously this part is not normal. I have a spare set of tubes to install here but before possibly damaging them, I want to see if there is something else wrong.

Thanks!

 

[Eped748]

Oops.
Perhaps I should have posted this in the Elekit section?

 

[AllenB]

As you wish.

 

[vkung]

EPED
Please send me the reference voltages..

 

[Eped748]

vkung:

I sent you a PM with all the reference voltages and some of the other things I found.

Thanks!

 

[vkung]

Multifunction Meter DIY kit, kuman Mega 328 Graphic transistor Tester, NPN PNP Diodes Triode Capacitor ESR SCR MOSFET Resistor Inductance LCD Display Checker with case and screwdriver K77, Multi Testers - Amazon Canada

Those caps were properly damaged.
If you do not know how to test those caps. You can buy this tool from AMAZON
to help you.

 

[soi]

Tube flash is normal, depending on the manufacturer. You can google it. I just learned about that recently. I use Northern Electric tubes too. They all flash.

 

[vkung]

EPED
Excellent
I am glad you can resolve your issue..