Portaflex b-15r schematic

mullardgz34 · #1 08-20-2011, 03:06 PM

Hello I am a newb to this forum

anyway I was curious if anyone had the schematic or link to the schematic for an Ampeg b-15 reissue. Some tech placed a resistor across the little pcb board for the bias switch. There are two yellow wires going to the board, when the switch is in EL34 mode there is continuity between the two wires. When the switch is in 6L6 mode there is no continuity between yellow wires.

Thanks

kaputsport · #2 08-20-2011, 03:27 PM

I guess Ampeg stopped placing the schematic under the head.

mullardgz34 · #3 08-20-2011, 04:15 PM

Quote:

Originally Posted by kaputsport

I guess Ampeg stopped placing the schematic under the head.

That would be nice of them! I think I figured it out anyway, I rechecked and was getting like 100k with it in 6l6 mode. I removed the resistor and now getting 190k. The person that replaced the tubes must have added the resistor to change the fixed bias.

It would still be nice to have the schematic anyway, it's a pain in arse to work on these things with the pcb boards and all.

beans-on-toast · #4 08-20-2011, 07:52 PM

Send an email to TechnicalSupport@loudtechinc.com requesting a copy of the B-15R schematic.

They will require you to send them your serial number and ask you to agree to a disclaimer. Then they will email you a copy.

stiles72 · #5 08-22-2011, 12:30 AM

I have one - just need to find it. Will send a PM once I do...

stiles72 · #6 08-25-2011, 10:01 AM

PM sent...