Hi guys,
Inspired via a search for a bass DI (e.g., R3DDI), had an idea about building an Ampe* B15 pre.
Came across this page:
http://www.freestompboxes.org/viewtopic.php?t=21081#p212078
From the OP:
"It uses a 12VAC input from a wall wart and then a transformer to step up the voltages for the plates. This is a pretty standard design choice with 12A*7 tubes because the filaments can run straight off of the wall wart voltage. However the B15N used 6SL7 octal preamp tubes. To deal with that issue a 12SL7 was used which by all accounts seems to be a 6SL7 designed to run on 12V for the filaments."
What do you guys think? Anyone build something similar?
My purpose is to use as a DI primarily for recording.
Cheers,
Chris
Inspired via a search for a bass DI (e.g., R3DDI), had an idea about building an Ampe* B15 pre.
Came across this page:
http://www.freestompboxes.org/viewtopic.php?t=21081#p212078
From the OP:
"It uses a 12VAC input from a wall wart and then a transformer to step up the voltages for the plates. This is a pretty standard design choice with 12A*7 tubes because the filaments can run straight off of the wall wart voltage. However the B15N used 6SL7 octal preamp tubes. To deal with that issue a 12SL7 was used which by all accounts seems to be a 6SL7 designed to run on 12V for the filaments."
What do you guys think? Anyone build something similar?
My purpose is to use as a DI primarily for recording.
Cheers,
Chris