It's very unfortunate that Paul Grzybek of Tube Audio Design passed away as he modded all the TA-30 units he sold to where they were easily biased from the outside. He mentioned that unless you know what you're doing, it can be quite dangerous. I would stay away from any unit where you have to do biasing from the inside as you have to turn it on, turn it over, and remove the bottom plate.
Having said that, the value you are looking for is .35V. Here is an article from 'Goodsound' that tells you. It's in the 7th paragraph down:
http://www.goodsound.com/equipment/cayin_ta_30.htm
I really enjoyed mine when I had it but it does put out a lot of heat.
All the best,
Nonoise
Having said that, the value you are looking for is .35V. Here is an article from 'Goodsound' that tells you. It's in the 7th paragraph down:
http://www.goodsound.com/equipment/cayin_ta_30.htm
I really enjoyed mine when I had it but it does put out a lot of heat.
All the best,
Nonoise