Multiple PS Caps-Effect on Sag?

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Cygnus X1
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Multiple PS Caps-Effect on Sag?

Post by Cygnus X1 »

Simply put-I didn't have any 16uf caps left for this 5C3 Tweed Deluxe build, so I ganged up 10uf caps to get a total of 20uf for the supply.
So I went from the designed 3 caps to 6!

The amp has about zero headroom (I'm looking at other opportunities in this area...that's a different thread).

Just wondering-did doubling the number of PS caps increase the sag on this amp?
I googled this, and came up empty for answers.

How could I measure it to tell?
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billyz
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Re: Multiple PS Caps-Effect on Sag?

Post by billyz »

I would guess it lowered it. Paralleling caps usually makes they act faster than a single big one.
doctord02
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Re: Multiple PS Caps-Effect on Sag?

Post by doctord02 »

I dont think there is much headroom to be found in a tweed deluxe... and any mod to increase/stiffen the power supply is gonna make it respond differently than a tweed deluxe. You might try regular solid state diodes to increase the voltages and decrease sag/squish, but it may well lose the dynamics that make tweeds sound the way they do.
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Structo
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Re: Multiple PS Caps-Effect on Sag?

Post by Structo »

When I first built my Hammond conversion amp, I went with a variation of the 5E3 circuit.
I didn't care for it at all.
Seemed as if the volume control was on or off and had hardly any clean headroom.

This was with a 1Meg volume pot too.

So I re-wired it to more of a Plexi style with bass and treble and now it works great.
Cleans up nice with the guitars volume control too.
Tom

Don't let that smoke out!
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Cygnus X1
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Re: Multiple PS Caps-Effect on Sag?

Post by Cygnus X1 »

I do like my homebuilt 5E3.
It's no heavy metal amp by any means but it has a place in the stable.

I'm going to go back and take a closer look at
the bias on the 6V6's. I suspect the problem lies there.

Those power supply caps ought to last 20 years-estimating an averaged 1000V rating.

Thanks, all!
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