BobW wrote:Bob, I understand the reduction in hum w/ the foil on the low Z side, but since the signal is ac, am stumped on the reason for a tonal change? I have also noticed a tone change on some caps when reversing them too.
More than likely it is proximity effect to other components in the signal chain. ie bleedover between components. Normally you are placing the outside foil on the plate feeds, some awefully big signals are sitting on the foil. I have never tested the effect, but would guess that there could be some phase cancellation.
Just a SWAG....
Gary
Located in the St Croix River Valley- Afton, MN
About 5 miles south of I-94
aka K0GWA, K0 Glas Werks Amplification www.glaswerks.com
Firestorm wrote:I wonder how different these are from the 225Ps. Same thing as far as I can tell, except the 225Ps are "squished."
Well if you go by the spec sheet they are the same.. I use them in a few places in my SOD II and Zingaro amps. They play pretty well....
From Vishay
FEATURES
• Identical performance characteristics to Type
225P pressed polyester capacitors through 600
WVDC ratings
• Wound from PETP polyester film and thin gauge
foil under carefully controlled atmospheric
conditions
• Protected against moisture by a conformal coating of
epoxy
• Specifically designed for printed wiring board applications
• Widely used in computers,
Located in the St Croix River Valley- Afton, MN
About 5 miles south of I-94
aka K0GWA, K0 Glas Werks Amplification www.glaswerks.com
