would 100k//1500PF sound the same as 500K//500PF?

[jamme61]

well I can't help myself I found this info on the web about the 20th ecstasy changes that were made and I switched mine over. Noticed the blue and plexi mode are pretty much the same. The red channel is a big difference. a lot more gain but clearer and less flub. I'm not a big gain guy(classic rock blues) I can run the gain a lot lower on red and it sounds fuller. I didn't touch the plexi mode in my amp. Below is the info I found. do they make sense to you guys they sound fine.Thanks again for all the time on this.

update added info- originally left out the first line- sorry



First of all, 1st and 3rd coupling caps (C1 & C14) values has been changed to 10nF (101B - 4.7nF) and to 2.2nF (101B - 22nF). By doing that the lows are coming earlier into the circuit (more nF's in CC - more bass going thru) and are being cut out after the last gain stage.

2nd stage's grid stopper was increased from 500K to 1M and added 330K voltage divider resistor before that, with added 2nF cap before 1M grid stopper. 101B has here 499K grid stopper resistor bypassed by 470pF cap (R112//C112), which is basically a regular treble-peaker like in 1959/2203.

Also 470pF bypass cap from 3rd stage's 500k grid stopper has been removed - less bass going thru.

The 2nd cathode was changed from 4.75K to 2.7K and is bypassed by 1.5uF tantalum cap, like in Classic. Structure circuit was removed.

Bogner also removed cold gain stage, changing 3rd stage's cathode from 10K to 2.7K, bypassing it also with .47uF electrolytic cap (sort of SIR '39 mod).

4th cathode 1K is now bypassed with switchable 1uF marked Vintage/Modern (the switched is placed where Structure switch in 101B is)

Plexi Mode values has been changed from 499K//470pF to 2.2M//100pF

B1 & B2 was reworked from 470pF|4.7nF to 150pF|1nF

Big part in overall 20th Ann to is Classic filtering and Sozo & Mojo Dijon tone caps. They are film-to-foil polyester caps, opposite to 101B's Wima FKP polypropylene caps. That make the distortion smoother and more middy.

[martin manning]

Is there a schematic for this thing somewhere?

[jamme61]

here's the schematic I use. the numbers don't match but the layout is right.

[Gaz]

well I can't help myself I found this info on the web about the 20th ecstasy changes that were made and I switched mine over. Noticed the blue and plexi mode are pretty much the same. The red channel is a big difference. a lot more gain but clearer and less flub. I'm not a big gain guy(classic rock blues) I can run the gain a lot lower on red and it sounds fuller. I didn't touch the plexi mode in my amp. Below is the info I found. do they make sense to you guys they sound fine.Thanks again for all the time on this.



(101B - 4.7nF) and to 2.2nF (101B - 22nF). By doing that the lows are coming earlier into the circuit (more nF's in CC - more bass going thru) and are being cut out after the last gain stage.

2nd stage's grid stopper was increased from 500K to 1M and added 330K voltage divider resistor before that, with added 2nF cap before 1M grid stopper. 101B has here 499K grid stopper resistor bypassed by 470pF cap (R112//C112), which is basically a regular treble-peaker like in 1959/2203.

Also 470pF bypass cap from 3rd stage's 500k grid stopper has been removed - less bass going thru.

The 2nd cathode was changed from 4.75K to 2.7K and is bypassed by 1.5uF tantalum cap, like in Classic. Structure circuit was removed.

Bogner also removed cold gain stage, changing 3rd stage's cathode from 10K to 2.7K, bypassing it also with .47uF electrolytic cap (sort of SIR '39 mod).

4th cathode 1K is now bypassed with switchable 1uF marked Vintage/Modern (the switched is placed where Structure switch in 101B is)

Plexi Mode values has been changed from 499K//470pF to 2.2M//100pF

B1 & B2 was reworked from 470pF|4.7nF to 150pF|1nF

Big part in overall 20th Ann to is Classic filtering and Sozo & Mojo Dijon tone caps. They are film-to-foil polyester caps, opposite to 101B's Wima FKP polypropylene caps. That make the distortion smoother and more middy.

I'm not even sure how you could make sense of all those comments to mod your amp properly the the 20th anniversary specs. That person who wrote that doesn't seem to know what they are talking about, which is a shame if they have seen inside the new version.

[jamme61]

Stk for me Thanks for the time

[roberto]

I've to search some plots done years ago that came into my mind only yesterday. That configuration has a sort of low end faible enhancing.

[roberto]

Here it is by Joey Nazari
http://slocloneforums.com/viewtopic.php ... 7&start=69

[matt h]

(deleted)

[jamme61]

Here it is by Joey Nazari
http://slocloneforums.com/viewtopic.php ... 7&start=69

thanks for the link checking it out

[martin manning]

Here it is by Joey Nazari
http://slocloneforums.com/viewtopic.php ... 7&start=69

Looks like that discussion is about the third stage, where Jammie is asking about the second.

[roberto]

You are absolutely right, my fault.
Use my previous "sofa plot" as an indication of what happens.

[jamme61]

This is a great read for me-thanks