The Worlds First Fully Comp PL 400 Using White Oak Components !!!!!

[NavLinear]

Don't get your hopes up for next week. The PL400 project took over 5 months from start to finish. There was a restart in that project though when I dumped the sockets all together and went for the solder in as far more reliable.

You already know the angle of the dangle - just add a few more output drivers and call it good.

 

[derek92994]

You already know the angle of the dangle - just add a few more output drivers and call it good.

Careful, you'll blow something

 

[laatsch55]

32.5325 degrees, hmm... Did ya have to take it to 4 places??

 

[NavLinear]

32.5325 degrees, hmm... Did ya have to take it to 4 places??

Only an engineer would take out the dangle angle to ten thousandths of a degree. I bet he hit it dead nuts though.

 

[laatsch55]

Yep, the damn thing fit for me every time..

 

[laatsch55]

Ya know Joe had it right when the white nylon bushings for the TO-3 holes kinda "snapped" on and wouldn't fall out.

 

[NavLinear]

It's obvious Joe put a lot of thought (and time) in his design. What a great improvement this makes aesthetically and a much improved topology. The entire back wall is cleaned up - just a few wires left to route from one side of the amp to the other. Most of the remaining wires are now short runs from board to board. SWEEEEEEEEEEEET.

 

[laatsch55]

And it just screams SOTA. In my world anyway. Ever see a 4 layer board in anything audio??

 

[NavLinear]

And it just screams SOTA. In my world anyway. Ever see a 4 layer board in anything audio??

Modern stuff like CD players are multilayered boards. Lots of digital lines to route and I wouldn't be surprised if they were more than four layer boards. All the vintage SS stuff used a single or dual layer board and the tube gear was a bunch of components hanging in the air hooked up to the tube sockets.

What Joe has done is provide a circuit that has a big ass ground and power plane along with a clean interconnect for the pre-drivers and drivers (and all other back wall components) that really cleans up the layout ills that the PL amps have. Anyways read some wine reviews to get proper adjectives and then do a write up of how the amp sounds.

 

[kevin]

Kevin, your 400 already has a Rev A board right?? To use the fully comp option a guy needs the D board.

Lee.... Mark did my 400.... Im pretty sure it does...You would think I could at least answer that. If I was guessing I'd say yea it does. HAS ANYONE HEARD ONE WORD FROM HIM SINCE HE POSTED ALL THAT STUFF FOR SALE AND NEVER SAID ANOTHER WORD ??????? He had a beat up 400 at that time for 150 bucks. I really thought that was going to be my second one.

 

[laatsch55]

He still owes me for that one. I think he's doin time.

 

[NavLinear]

No way!! He seemed like a real geek to me - and I tend to like well grounded geeks.

 

[Gepetto]

Ya know Joe had it right when the white nylon bushings for the TO-3 holes kinda "snapped" on and wouldn't fall out.

I agonized over that with Micro Plastics...it could not be sloppy and had to have good guidance for a #6 machine screw.

 

[laatsch55]

Not as much as you agonized over the TO-3 angle......

 

[laatsch55]

No way!! He seemed like a real geek to me - and I tend to like well grounded geeks.

Dennis if it's one thing I learned in prison, nice guys land in jail too. What else would explain his total absence?? Even on vacation a guy can slip in and talk smack once in awhile... As involved as he was I don't think his absence is voluntary. He was not the kind of guy to post about getting rid of stuff and then not answer inquiries...

 

[Gepetto]

Not as much as you agonized over the TO-3 angle......

I even called and emailed Keystone. Unfortunately their engineering support department was not any help at all. Totally amazing to me.

 

[kevin]

He still owes me for that one. I think he's doin time.

OMG !!! That blows what little mind I got ! Makes good sence ! That would have been the last thing that entered my mind ! HELL YES LEE... Really really good guys do time !!!!!

 

[laatsch55]

I even called and emailed Keystone. Unfortunately their engineering support department was not any help at all. Totally amazing to me.

Keystone didn't know what the angle was??

 

[laatsch55]

I agonized over that with Micro Plastics...it could not be sloppy and had to have good guidance for a #6 machine screw.

Was Micro easy to work with. ??

 

[Gepetto]

Keystone didn't know what the angle was??

Not to anything they provided Lee. Hard to figure out how folks design with those sockets short of just measuring them. Which is where I ended up.