The Amp Garage

This is one of my favorite pics to demonstrate measurable differences exist between different dielectrics. Now, the hard part is quantifying that, and translating to how it will sound in a guitar amp. It's clear that one of these caps is superior if you're going for minimum THD, for something like ...

Here's some background info from the original owner; https://www.youtube.com/watch?v=I94Gw4JJyZs

Maybe just lock this thread. We get to a point where mocking and heated comments taking over.

I connected as written and the OD is pretty fantastic. Definitely a different flavor than 102. All switches and pots work as they should, but Manual/Pedal didn’t cut off the sound when I switched to pedal. Could I have a defective switch as well? Looking at it - it would seem to me that the switch ...

Equivalent series inductance makes the impedance of a resistor plus ESL higher with frequency. The frequency where the inductive reactance equals the resistance is taken as the critical point of its filtering. The frequency were that happens is F = R / (2 * pi * L). I did a quick look for the self ...

5 sets available

Did anyone read, besides Martin, the Bateman files I posted in this thread? Real numbers there

I am learning as we go so I will spell things out so I have a reference when I need to come back to this. I have moved the signal cable from the front high input jack to the loop input jack on the rear. The layout diagram shows power amp in. I injected 400Hz at 1.5Vrms which gave me a plate voltage...

When I connect the DMM probe from V4 pin8 and the second probe to V5 pin 8 I can now zero it. I assume from here I just need to do slight adjustment by ear to get it slightly out of phase? Would that result in a + or - voltage reading on the meter? Does this procedure need to be redone whenever a t...

I gave the Ampeg procedure a try. I set the power tube bias to 34v. Both tubes were showing 34v on the DMM. I injected a 400Hz signal at 1.5 Vrms into the high input jack I adjusted the master volume for an output of 18Vrms at the 8 ohm dummy load Using a DMM I connected the black probe to the chas...

bepone wrote: ↑Fri Mar 01, 2024 6:08 pm noise is the difference in sound between the resistor types?

i heard everything in my life.. but this..

Did you read the post above yours from Martin?
The researchers considered the possibility of non linear behavior due to noise. Interesting stuff!

martin manning wrote: ↑Fri Mar 01, 2024 4:37 pm Metal film resistors are not all equal in noise, and this has been measured. Whether it's audible by humans is another question, since they are in general so much superior to CF that the difference between MF's seems negligibly small.

That might be a explanation I won't rule out.

Here is a pdf and link to various articles and tests regarding different dielectrics vs voltage stress on capacitors. Thanks, Erwin, I have saved copies of those articles but at that link they are all conveniently collected, and they are much cleaner than the ones I have. I think most people accept...

Here is a pdf and link to various articles and tests regarding different dielectrics vs voltage stress on capacitors.

https://linearaudio.nl/cyril-batemans-c ... d-articles

Erwin

Raoul Duke wrote: ↑Sat Feb 24, 2024 8:40 pm Ok, cab is done - back to the part I don’t know squat about, lol:
Mock up to check fit:
IMG_0194.jpeg
Final (on top of 102):
IMG_0195.jpeg

On to finishing up the power section and hopefully testing that soon.

Stunning looks!