The Amp Garage

Nice
I got a ES335 cheap on craigslist/kijiji recently too. I also replaced the electronics right away. 300K pots and cheap little ceramic caps

FET won't affect input impedance. You can set the impedance as you want, just tweak the gate leak resistor. Also with a pulldown resistor on the FETs input and a solid relay switching scheme you won't have any popping. Don't look at the ODS FET boost for ideas, it's not that great. I'd look at runof...

richon wrote:Hi,

I was wandering what difference would be having the Eq between V1a and V1b versus having it after V1b (between V1a and V1b it would be only a "gain/Clean" pot)

Then you'd have a Marshall more or less (no CF).

The TS can drive the PI, look at Marshalls for example.

I think it's a great idea.

I'd install some switches or relays to configure the output stage differently depending what channel your on (NFB, cathode/fixed bias, PI type, output tube type, etc.).

The small cap is doing nothing when in parallel with the big electrolytics. The fact the small cap is a film cap does do a bit to the tone though.

I have used that type of one tube reverb on amps numerous times and really like it. I actually prefer it over the Fender reverbs because this allows a few more mids to be verbed which gives it a better tone to my ears. Not saying it's better just that I prefer it. That type of one tube reverb isn't...

Put some diodes and a fuse in series with each HV winding going to the tube recto and you are pretty safe.

They do not play a huge factor in tone imo but like any great amp it is not one single component that makes the difference but many small components/factors put together.

R9 and R10 are the bias resistor.

They put the two 5W resistors in parallel to get a 10W resistor of the correct value.

That's not good Mark. When did you order?

If your B+ is about 350V you want a 150R 5W bias resistor.

Screen dropping resistor should be 1.5K, PI dropping resistor should be 8K2 and the preamp dropping resistor should be 2K2.

If you connect the control from the wiper you'd have more resistance in series with the control (150K + the resistance from lug 3 to 2).

This would shift the cutoff frequency of the low pass filter lower.

Got the book today (that was quick). Very impressive books, lots of material covered and it's hard cover to boot!

What's the rotary switch doing?
Looks like a cap from the pot's input to ground, so shunting some highs to ground.

UPDATE: I actually discovered last night I had my screens connected to the PI supply :( :oops: :oops: As a result my screens were way lower than they should have been (about 80V too low but the tone sounded great). I have sinced fixed this issue; voltage wise the screens and plates are about 1V apa...

Just got shipment email. Ordered on 26th