My ACF pre.

What people are working on at the moment
David
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#76

Post by David »

That's right is is for the version with gain, but by changing some components could be made as a CF version with a bit of effort.
David
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pre65
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#77

Post by pre65 »

I'll see how it fares after the work in progress.

So far, i've removed the 300R resistors from the tag board and put in wire links. The 300R are now hard up to the base pins.

Also, the 0.1uf (100nf) input caps have been fitted.

Just stopped for a tea break, then next job is to tidy up the ground wires, and sort out the hum. :wink:
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
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pre65
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#78

Post by pre65 »

I think 811a is where most of the hum is. :(

Anyway, with the ground wires fully sorted (?) and 0.1uf (100nf) input cap I think I'm getting some of Davids "magic". :)

After lunch (caviar blinis and champers today :lol:) I hope to get the 833a combo in on the act.
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
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pre65
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#79

Post by pre65 »

For me, with my amps the ACF pre (as I built it) is just not as likeable as my 26 pre.

It's difficult to discern the exact differences, but 26 is just that bit "warmer" and a tad more "smooth".

That may well mean that ACF is more "accurate", and with sensitive amps it is still very good.
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
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Mike H
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#80

Post by Mike H »

This is the problem isn't it?

pre65 wrote:After lunch (caviar blinis and champers today :lol:)
Do what? :shock:
 
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
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pre65
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#81

Post by pre65 »

Mike H wrote:
pre65 wrote:After lunch (caviar blinis and champers today :lol:)
Do what? :shock:
I was going to have an Elephant sarnie, but I'd run out of bread. :wink:
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
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Mike H
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#82

Post by Mike H »

Blimey - "let them eat cake"

:D
 
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
David
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#83

Post by David »

Is the circuit for your 26 pre on the site somewhere?
David
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