instead of the 8uf @150v the schematic calls for. They seem to be newer caps, should I change these out to the values called for in the schematic??
ange
[IMG
1152]http://i260.photobucket.com/albums/ii9/ ... G_1298.jpg[/img]Bias caps on 6G4
Moderators: pompeiisneaks, Colossal
Bias caps on 6G4
This 6G4 amp seems to have the incorrect bias caps - 50uf @150v
instead of the 8uf @150v the schematic calls for. They seem to be newer caps, should I change these out to the values called for in the schematic??
ange
[IMG
1152]http://i260.photobucket.com/albums/ii9/ ... G_1298.jpg[/img]
instead of the 8uf @150v the schematic calls for. They seem to be newer caps, should I change these out to the values called for in the schematic??
ange
[IMG
1152]http://i260.photobucket.com/albums/ii9/ ... G_1298.jpg[/img]
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Andy Le Blanc
- Posts: 2582
- Joined: Sat Dec 22, 2007 1:16 am
- Location: central Maine
Re: Bias caps on 6G4
the larger cap value should be the better..... but go with scheme if you want
lazymaryamps
larger caps
Why are the larger caps a good idea here. What exactly do they do in this spot.
ange
ange
Re: larger caps
They're just filter caps for the bias circuit. Since there isn't much in the way of current there, the caps don't need to be very big. 8-10µ is pretty standard, but I've used 160µ on at least one build because that's what I had on hand.angelodp wrote:Why are the larger caps a good idea here. What exactly do they do in this spot.
ange
Matt
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Andy Le Blanc
- Posts: 2582
- Joined: Sat Dec 22, 2007 1:16 am
- Location: central Maine
Re: Bias caps on 6G4
you get less ripple in the DC.... not a bad idea for a half wave rectifier
the RMS ripple current can be 2 to 3 time the DC load current
the RMS ripple current can be 2 to 3 time the DC load current
lazymaryamps