ampage Tube Amps / Music Electronics	For current discussions, please visit Music Electronics Forum.

ampage archive

Vintage threads from the first ten years

previous: fj It's sort of a collaboration on the... -- 7/19/1999 9:36 PM

Re: Voltage measurements on 2 6V6 parallel CHAMP...

7/19/1999 11:52 PM
MBSetzer	Re: Voltage measurements on 2 6V6 parallel CHAMP... Hi FJ & All: Looks like you are doing the right thing, is this in a Fender Champ original chassis? IIRC, the 125E should have an 8ohm load at secondary terminals 1 & 6 when the parallel 6V6's are connected with plates & ground between the brown & blue primaries. The red B+ for push-pull use would be taped back & insulated for this application. Then if you remove one tube for half-power, you would need to move the speaker to terminals 1 & 5 for an 8ohm load. Or use a 16ohm load on 1 & 6, since if you double the impedance on one side of the OPT, you need to double the other side. Hope this helps, Best Regards, MBSetzer

7/19/1999 11:52 PM

MBSetzer

Re: Voltage measurements on 2 6V6 parallel CHAMP...

Hi FJ & All:

Looks like you are doing the right thing, is this in a Fender Champ original chassis? IIRC, the 125E should have an 8ohm load at secondary terminals 1 & 6 when the parallel 6V6's are connected with plates & ground between the brown & blue primaries. The red B+ for push-pull use would be taped back & insulated for this application.

Then if you remove one tube for half-power, you would need to move the speaker to terminals 1 & 5 for an 8ohm load. Or use a 16ohm load on 1 & 6, since if you double the impedance on one side of the OPT, you need to double the other side.

Hope this helps,

Best Regards,

MBSetzer

Replies:

tboy q{..if you remove one tube for half... -- 7/20/1999 0:19 AM