rectifier circuits

[jestaudio]

Looking at your other post, the Laney was already using el84x4, that transformer should about right. Are you measuring AC voltage? That PT has to be putting out more than 120v.

Is the PT still in the original circuit? Can you measure DC after the rectifier?

320 after the rectifier and before the first of the dropping resistors, about 309 at the el,s

[LeftyStrat]

Looking at your other post, the Laney was already using el84x4, that transformer should about right. Are you measuring AC voltage? That PT has to be putting out more than 120v.

Is the PT still in the original circuit? Can you measure DC after the rectifier?

320 after the rectifier and before the first of the dropping resistors, about 309 at the el,s

Then you shouldn't have any problems. Just implement the 36w Marshall preamp in front of that power amp. No real advantage to gutting it completely.

[Phil_S]

309 is a very good number for EL84's. If this is a PCB amp, you might want to remove that and put in a turret board. You should be able to make a swap without too much extra work unless the turret board doesn't fit.

Have you got a guts picture of the chassis to share? It will keep us from the need to speculate and you'll get better quality suggestions.

[jestaudio]

309 is a very good number for EL84's. If this is a PCB amp, you might want to remove that and put in a turret board. You should be able to make a swap without too much extra work unless the turret board doesn't fit.

Have you got a guts picture of the chassis to share? It will keep us from the need to speculate and you'll get better quality suggestions.

i,ll post some tomorrow, its new years eve over here(11.35) so i,ll be signing off for tonite and getting a few drinks down my neck