I was thinking the last time I biased my 6545 with EL34s (25 watters), I biased at 35ma (65% is usually what I shoot for), but I'll check it out next time I get to our practice space where I keep my 6545.
I put a small sticker with date and measurements on the chassis every time I bias/retube. I do the same thing on the preamp tube retainers every time I test a preamp tube and use it in an amp. Maybe just me being anal-retentive, but it does let me know what I have in there at a glance.
I've run a couple of NOS Tung Sols in the 12AX7 slots before and they sounded great - not sure how they'd compare with the current production stuff.
Hey Paul. When I picked up my 6545 it had EH EL34's with a plate voltage of 432v and bias at 31ma. I'm using a GT 12ax7-M phase inverter (came with the amp, in fact all of the 12ax7's were GT 12AX7-M) and Groove Tube #7 EL34's. The plate voltage is 420v so I set the bias to 34ma using the voltage/current chart from the website below. Then if I recall tweaked to what I liked but can't remember where I set it.
GuitarZ: I'm okay with the AARP letters. You're still living and breathing? What the heck am I to think when a funeral home sends me a free consultation offer? Ouch!
Jun 21, 2019 15:41:26 GMT -7
The Bad Poodle: I bought airline tickets online... now every few days i get emails that read "Your trip is almost here but aren't you forgetting something?? You don't have trip insurance!" and i'm thinking..."is there something i should know about your plane maintenance?"
Jun 21, 2019 16:02:32 GMT -7
GuitarZ: Reminds me of buying my Honda. When they tried to sell me the maintenance package, I said "Is your car not reliable?" Long story short my wife teamed up with the sales lady to buy the maint package. Never again!
Jun 21, 2019 16:16:53 GMT -7