Wreck/Rocket

[Colossal]

Very sweet! I'll bet it sounds great.

[hans-jörg]

Hi Mark,
a very interesting layout! Especialy the grounded triode. I have to try it in my Express built to tame down the remaining noise. I´m shure it helps, although I had luck with my wireing layout - its not soo noisy.
The PI is interesting too. Very economical and one resistor to much for my knowledge of the Rocket schem (between the two coupling C - a 220k if I´m right). I think these are the special ingredients of DR.Z and therefor tabu

Best

Hans-Jörg

[JoeCon]

Mark,

Looks awesome!

Did you tame down the first stage with a 100K instead of a 220K on V1 of the rocket? For a little less gain there?

Or maybe on the V2 stage where the Z-Wreck has a 220K?

Or maybe both??

Thanks....

[M Fowler]

Did you tame down the first stage with a 100K instead of a 220K on V1 of the rocket? For a little less gain there?

No I went with the 220k. I noted the 220k on second stage to maybe reduce to 100k but I'm sure I went with 220k.

Mark

[M Fowler]

Finished up the cab.

[JoeCon]

Mark,

Switch on the back to switch between two secondary voltages like 250 or 280??
Any real difference between the two?

Beauty of an amp/cab!!

[M Fowler]

Joe,

Thanks for the comment.

I generally keep the switch on the high voltage side. But it's worth adding the switch since a lot of the PT's available have multiple HT taps we might as well wire for use. I tend to like my EL84's cooking so go with the higher HT which is 280v.

I've use the Express PT on some builds with voltage of 300-0-300 with four EL84's with no problems using matched set of JJ's. You will need to watch the preamp voltages and adjust the dropping string.

I try to find PT's at 290-0-290 but unless it's a Vox replacement or custom most are 280v or 300v.

Mark

[JoeCon]

Mark,

My Edcor is a 280-0-280 so I'm in the ballpark. Got most of the hardware now just waiting on a chassis and then I'll get the resistors and caps..

Then I'll have some questions!! LOL...

Thank you...

[M Fowler]

I told Doc I would not promote cloning of his Zwreck on TAG.

Enjoy your build Joe

Mark

[JoeCon]

Mark,

Mines a mish mash but mostly Rocket all the way with the Z Wreck filtering and SS rectification!! See a real "custom". LOL...

See ya!

[M Fowler]

Mark,

Mines a mish mash but mostly Rocket all the way with the Z Wreck filtering and SS rectification!! See a real "custom". LOL...

See ya!

Perfect, I like that