Willsenton R8: Repair and Testing!

This is a video series about the popular Willsenton R8 KT88 EL34 Push Pull tube audio amplifier. We will go through the repair this amp needs, testing and reviews of the amp as delivered, and then work on modifications to improve the sound quality and durability.

I also want to note something a viewer pointed out, when doing some of these initial voltage tests after the repair, I was using a variac/isolation transformer for safety, which wasn't supplying full line voltage to the amp.

The voltages on this amp are 430V on the plate, 427V on the screen in triode and 428V on the plate with 430.5V on the screen in UL, which I may want to play with the value of the screen stopper to lower the screen voltage a touch. Sorry for any confusion that may have caused.

This first video is about repairing the amp that was brought to me and the initial testing done to benchmark it's performance.

You can buy this amplifier here
https://amzn.to/3Q3Ynjr

The test gear I use in this video includes:

Analog Discovery 2 Kit
https://amzn.to/3Z1F4LF

BNC to RCA cable
https://amzn.to/3Cct9AZ

RCA Y cable
https://amzn.to/3Q8PwNC

A pair of 8 Ohm non-inductive dummy loads
https://amzn.to/3GoRSoe

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