How to measure plate voltage on DSL40CR

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Hi,

I wanted to measure the "Plate volteage" of my DSL40CR. Googling, the closest I got to was "pin 3". Have no idea where that is.

Thanks

asked 07 Feb 2021 at 09:19 PM

Answers: 1

Plate (or anode) - is a pin 3 of EL34 power tubes in your amp.

https://www.hifikit.se/media/catalog/product/cache/1/image/1200x/040ec09b1e35df139433887a97daa66f/e/3/e34l_02.jpg

Warning: there is lethal voltage inside your amp, so DON'T open the cover when device is connected to wall socket, unless you are experienced with high voltage devices.

answered 09 Feb 2021 at 08:59 PM

Many thanks! If one were to measure this, does that mean I would have to remove one of the EL34s and put the red probe (?) in the hole for the third pin, and the common/zero to which part?
Shouldn't the EL34 be still in its socket for a proper reading? Do you wiggle it out a little bit and then measure between pin 3 and ???
And thanks for the warning, I understand it can be up to 500V. - 09 Feb 2021 at 09:42 PM

The tube should definitely be IN a socket. Try to find access to the bottom part of the socket. Voltage measurement is always done between specified point (pin 3 in this case) and ground - metal chassis of the amp. - 10 Feb 2021 at 08:17 AM