phase linear 400

[VSAT88]

The PL14 was a mainstream board Gene, more of them in PL400s than any thing else for the Series 1. They are all basically the same but over time they figured out how to make them cheaper and cheaper. The PL36 is the pinnacle of the low cost efforts at PL.

And wont ya know that is exactly what is in this series II PL 400 I bought the other day.

 

[VSAT88]

I've documented some SERIOUS voltage sag at times...but...ya know...someone had to do it..

LOL!

 

[George S.]

couldnt you make two cables???
left signal, right signal, common ground/shield???

Probably best to have two individual cables to reduce chance of crosstalk.

 

[gene french]

noted....

 

[laatsch55]

is a sign of serious voltage sag directly correlate with the blood exuding from your ears???

Yep, right there at clipping it gets ugly..

 

[laatsch55]

700 watts per channel at 4 ohms you get some serious sag..

 

[J!m]

Has anyone been crazy enough to add a second transformer to one of these yet? And another pair of main capacitors?

Basically, do the full "dual-mono" mod? It should be able to handle quite a bit more abuse that way, I would think...

But, perhaps it is better to just convert them to mono amps, similar to how I did my Counterpoint amps?

Just thinking out loud, which is usually both scary AND expensive...

 

[gene french]

but, you will have stories for the grandkids!!!

 

[Gepetto]

Has anyone been crazy enough to add a second transformer to one of these yet? And another pair of main capacitors?

Basically, do the full "dual-mono" mod? It should be able to handle quite a bit more abuse that way, I would think...

But, perhaps it is better to just convert them to mono amps, similar to how I did my Counterpoint amps?

Just thinking out loud, which is usually both scary AND expensive...

Something really good...

 

[J!m]

Presenting... The WO 1kM

1000 watt (8 ohms) monoblock amps! In time for Christmas?

Can we do that with only 120VAC (or less) supply?

 

[MusicSteve]

And wont ya know that is exactly what is in this series II PL 400 I bought the other day.

Have you had time to work on it yet? The Boards also use Op-Amps

 

[VSAT88]

I put in and checked the rest of the OPT . Bought a few bias transistors just in case. I am thinking of just buying the e bay kit for 33 bucks that has all the driver transistors and all in one little kit and re capping the board. Putting it all back together and see what burns.

 

[gene french]

I put in and checked the rest of the OPT . Bought a few bias transistors just in case. I am thinking of just buying the e bay kit for 33 bucks that has all the driver transistors and all in one little kit and re capping the board. Putting it all back together and see what burns.

let er rip tater chip!!!

 

[VSAT88]

I found a thread over at AK where some dude had put together all of the stock board upgraded / recommended parts. He said that some of the info came from Don himself but now I cant find the thread so I guess all back stock. I can tell you for a fact that R112 and R1 are toast. Hell R1 reads 7.82K ohms.

 

[MusicSteve]

I found a thread over at AK where some dude had put together all of the stock board upgraded / recommended parts. He said that some of the info came from Don himself but now I cant find the thread so I guess all back stock. I can tell you for a fact that R112 and R1 are toast. Hell R1 reads 7.82K ohms.

Kits are cheaper now, not a bad ideal (sometimes a shot gun approach is just quicker) are the outputs good I cant find your thread w the Pic of the Board I remember some bad traces? do you have the Link?

 

[VSAT88]

The old thread kinda started here... https://forums.phxaudiotape.com/threads/phase-linear-4000-series-two.10411/ . I put in good outputs. Checked both channels. I had a .33 emitter bad but all the rest are OK. Replaced the bad one. No bad traces just old... I will post over at the other thread.

 

[gene french]

The old thread kinda started here... https://forums.phxaudiotape.com/threads/phase-linear-4000-series-two.10411/ . I put in good outputs. Checked both channels. I had a .33 emitter bad but all the rest are OK. Replaced the bad one. No bad traces just old... I will post over at the other thread.

post it here...i want to see...without bouncing everywhere please

 

[VSAT88]

No... lol

 

[gene french]

you sound like my wife on my birthday...lol

 

[VSAT88]

Its here Gene...lol https://forums.phxaudiotape.com/threads/phase-linear-4000-series-two.10411/