Hi All,
I've just finished a 5E3 build and I've got some voltage problems.
I'm thinking it's the filter caps..New Sprague atoms.. but i'm wonderong if you could look at the voltages for me.
I'm getting 317Vac from the P/T into the rectifier, and 4.86Vac across pins 2 & 7
The 1st Filter cap is 275vdc (very low) 2nd cap is 205vdc and 3rd is 151vdc.
It seems to start at the first cap,then move on down the line
The 12AY7 voltages are pin6 75v,pin 1 80v and cathode is 1.19v
the 12ax7 voltages are pin 1 98vdc, pin 6 125vdc, pin 8 26.6v and 0.8v on the cathode
The 6V6 voltages are pin 3 270v and 270v, pin 4 200v and 201v, pin 6 52mV and 45mv
I've checked the Amperage on the 6V6's from Centre tap to pin and I'm getting 51.2mA on both the blue and the brown
This is my 2nd deluxe build and I've had this problem before. I did buy the Spragues in a batch of 12. It seems weird that it's happened twice,Might be a bad batch
Any thoughts would be appreciated
Cheers
Watto
I've just finished a 5E3 build and I've got some voltage problems.
I'm thinking it's the filter caps..New Sprague atoms.. but i'm wonderong if you could look at the voltages for me.
I'm getting 317Vac from the P/T into the rectifier, and 4.86Vac across pins 2 & 7
The 1st Filter cap is 275vdc (very low) 2nd cap is 205vdc and 3rd is 151vdc.
It seems to start at the first cap,then move on down the line
The 12AY7 voltages are pin6 75v,pin 1 80v and cathode is 1.19v
the 12ax7 voltages are pin 1 98vdc, pin 6 125vdc, pin 8 26.6v and 0.8v on the cathode
The 6V6 voltages are pin 3 270v and 270v, pin 4 200v and 201v, pin 6 52mV and 45mv
I've checked the Amperage on the 6V6's from Centre tap to pin and I'm getting 51.2mA on both the blue and the brown
This is my 2nd deluxe build and I've had this problem before. I did buy the Spragues in a batch of 12. It seems weird that it's happened twice,Might be a bad batch
Any thoughts would be appreciated
Cheers
Watto
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