OLD PPI2300M Restoration problems

[djpaesgana]

fuuuuk after i checked all to-92 i was a liitle upset because everything tests good so i removed the light bulb, the variable power supply was capped at 1A power and it was activating the OCP me thinking was protecting from a short (before changing all caps consumption was about 800ma on idle) i said **** it lets give it some more room and see what heats up so i setted it to 1.3A and IT WORKS now is consumming a litle more than 1A on idle !!! waveform its the same on both channels now to change the 8 25n05E for the 10 IRF3205

 

[Perry Babin]

Reduce the DC input voltage as far as you can without the amp shutting off. Does the current draw increase at the lowest voltage it will run at?

 

[djpaesgana]

Reduce the DC input voltage as far as you can without the amp shutting off. Does the current draw increase at the lowest voltage it will run at?

minimum voltage it turns on - wave at rectifiers - wave at drain - wave b4 gate resistor - wave at gate IRF3205 - Wave at 25n05e

 

[djpaesgana]

it still has the original gate resistor what value should i order

 

[Perry Babin]

I would expect that the IRF3205s would be heating up more than the original FETs. Are they?

Typically, 47 ohm gate resistors are used with 3205s.

 

[djpaesgana]

I would expect that the IRF3205s would be heating up more than the original FETs. Are they?

Typically, 47 ohm gate resistors are used with 3205s.

the 2.2k stay like that?

 

[djpaesgana]

both supply channels cold playing a 100hz sineweave
b4 distortion without any load still at 8.4v oops

 

[djpaesgana]

yes at 13v irf3205 are hot and 25n05 do not

 

[djpaesgana]

i can get 47 OHMS 1/2W or 1/4W carbon resistance and PRECISION RESISTOR 47.5 OHMS 1/4W not a lot of diference on price

 

[Perry Babin]

1/2w won't fit in the allotted space.

47 or 47.5 won't make a difference.

 

[djpaesgana]

thank you a lot