Spencerleehorton
Well-known member
Hi all,
I have previously built a fender champ but it was a while ago and it's been dismantled and all the parts scattered!!
I've managed to find the PT I used from a broken line 6 spider but the power transformer was fine.
It has the following taps
195v
60v
25v
100v
6.5v
6.5v
I had used this PT but cant remember how I had done it.
Now looking at the champ PT specs it needs 650v, 5v and 6.3v
By the looks of this txf the most i can get out of this txf is 380v, 6.5v and 6.5.
I didnt use the rectifier tube before and used a diode bridge.
So if I'm correct if I put the 195+60+25 that will give me 280v ac, with bridge diode should then give me 280 x 1.2 = 336v dc.
Then I would need to adjust the first two resistors to get 325v and 255v.
Cant for the life of me remember how to calculate but will look through my notes, if any could pitch in please?
I have previously built a fender champ but it was a while ago and it's been dismantled and all the parts scattered!!
I've managed to find the PT I used from a broken line 6 spider but the power transformer was fine.
It has the following taps
195v
60v
25v
100v
6.5v
6.5v
I had used this PT but cant remember how I had done it.
Now looking at the champ PT specs it needs 650v, 5v and 6.3v
By the looks of this txf the most i can get out of this txf is 380v, 6.5v and 6.5.
I didnt use the rectifier tube before and used a diode bridge.
So if I'm correct if I put the 195+60+25 that will give me 280v ac, with bridge diode should then give me 280 x 1.2 = 336v dc.
Then I would need to adjust the first two resistors to get 325v and 255v.
Cant for the life of me remember how to calculate but will look through my notes, if any could pitch in please?