thinking of building a 5f4 next. My question is when using a tube rectifier,how much can I stiffen up the filtering?the schematic I'm looking at(Weber)has 16u-choke-16u 16u 8u using a 5u4gb or solid state equivilent. Can I up this to 40u- choke- 40u 20u 10u? Remember that's using a TUBE rectifier 5u4gb or maybe a 5ar4/gz34type
Ad Widget
Collapse
Announcement
Collapse
No announcement yet.
filter caps in 5f4-How much is too much?
Collapse
X
-
A 5U4G is good for 40uF reservoir. (But it will sound a bit less 'supery' if it is cleaner)
A 5AR4 is good for 60uF reservoir, but the B+ wil be about 30V or so higher, which will increase the headroom a bit and keep it alot cleaner and brighter (- but you may not like this)Last edited by tubeswell; 09-21-2009, 09:06 PM.Building a better world (one tube amp at a time)
"I have never had to invoke a formula to fight oscillation in a guitar amp."- Enzo
-
Originally posted by txstrat View PostI thought about building a 5f4 next too.
Not to change the behavior of the amp I wouldn't go over 22uF instead of the 16uF all the way.
I want it to sound as close to the original as possible, that's why.
Just my .02 $
So that means a 16uF cap could be 13uF on up to 29uF and still be within the extreme ends of the specs.
I don't think very many here (myself included) could tell me which amp has the 16uF or the 22uF caps and I doubt it would make much tonal difference if it was 33uF over a 16uF to 22uF cap either.
Sometimes the very first preamp stage sounds very very slightly stiffer when you use a 22uF cap and it called for an 8uF cap.
Comment
-
Bruce
I see what you mean.
I'm not as expierienced as many folks in this forum, that's why I usually use the values from the schematics (slightly higher if not available) and that's why I suggested 22uF.
What benefit would it have to use 47uF then? Less hum? I mean, if it doesn't make a (big) difference tonewise or whatever, why go up to 47uF and pay more for the caps?
Comment
Comment