I saw on tube clearly marked EL84 China.I think another was 6N3.
The exact same tube either way.
The Chinese tubes are Shuguangs.
Yarland owners have a fine amp at a low cost, I am sure.
You guys just don't realize how much better it could sound with the right combo.
Using all four Chinese tubes may seem to be good to you but it is not - it is too bright and harsh.
You can't realize this until you change to better tubes, but some people wouldn't be able to tell even after that.
I will send two new Russian 6P14P EB (military type is EB) to Fairbanks with an option to buy for $20 or return within 2 weeks at no charge.
I think the Yarland will sound better with the Russian tubes, but changing the 6N3 (5670) may also be required to get the best sound from the Russian tubes.
I plan to buy the Yarland in the future - I really like Chinese amps and Yarland has a good reputation for fine sound.