hi all im new to el34 - do i need a probe - also in an amp with one el34 does it need to be bias adjusted?
Who knows? But the people who can answer your (very loose) question generally don't like textspeak and do like properly written English with appropriate capitalisation. Just a thought.
Kinda looks like you'll need a multimeter, set to millivolts. I googled your amp and came across this thread: https://www.diyaudio.com/community/threads/my-mods-of-audio-institute-vr-70e.317767/
There are schematics at the bottom of the first page, which show bias pots for each EL34. Good luck. 🙂
jeff
