Russ' Phase Linear 400 Ser I---TO BE WOPL'd

[laatsch55]

Did not survive the max output stress test. D10 in the left channel went at 305 watts, Q7 in the left and Q7 in the right went shortly thereafter. Replacing those components now....

 

[NavLinear]

It was in Dennis. I thnk we have a non-workinh UPC 1237.

So it was the IC? Aren't those becoming a bit scarce? Glad you got it fixed quickly.

 

[NavLinear]

Frequency Response---UNWEIGHTED--

I don't remember one so well balanced as this. Talk about flat - I'm impressed.

 

[NavLinear]

Did not survive the max output stress test. D10 in the left channel went at 305 watts, Q7 in the left and Q7 in the right went shortly thereafter. Replacing those components now....

Isn't this a 400? I'm surprised this guy could crank the output that high. Was it clipping when it took a dump? You must've bumped up the rail fuse to get there though. Damn - over 300 watts per channel for something rated at a bit over 200 - another amazing feat.

 

[laatsch55]

It was well into clipping. Max will be about 260 for this one,

 

[Northwinds]

WOW whatta monster!!!

 

[Gibsonian]

Amazing s/n and overall noise levels with the 2X WOPL system. I gotta get one of them.

How's that 700 complimentary conversion design coming along? On the cusp of release??

 

[Gepetto]

Did not survive the max output stress test. D10 in the left channel went at 305 watts, Q7 in the left and Q7 in the right went shortly thereafter. Replacing those components now....

You were deep, deep into the protection circuitry attempting in vain to protect against Lee if you took out D10

 

[laatsch55]

You were deep, deep into the protection circuitry attempting in vain to protect against Lee if you took out D10

That's exactly the scenario Joe. Squealed like a pig before it went too. Actually I think I had it at 350 or so. There's a lag between turning up the input off the AP generator and that F@#%$& with me sometimes. I brought up the sig gen too fast.

 

[laatsch55]

Amazing s/n and overall noise levels with the 2X WOPL system. I gotta get one of them.

How's that 700 complimentary conversion design coming along? On the cusp of release??

More like spring Scott......

 

[Michael F]

Ready for a board.....

Now THATS a ground buss bar. Looking good.

 

[laatsch55]

Around here they're known as a BABB (bad ass bus bar). There was also one of those in the care package.

Listening to the little bugger now.

 

[Michael F]

Damn, that doesn't look anything like a PL400, bet it doesn't sound anything like one either. So, how does it sound??

 

[Gibsonian]

More like spring Scott......

Winter of anticipation draws near.................

 

[frhodes]

Lee,

Where did you get those monster CDE Caps?

 

[laatsch55]

Ed Blackwood sent me a box of em this summer. They are 1/2" longer than the stock variety so sometimes they interfere.

Mike, it sounds remarkably like a 400, except lower, tighter bass, cleaner mids and better defined highs....


Scott, that was a very pessimistic approximation..

 

[laatsch55]

Lee,

Where did you get those monster CDE Caps?

At one time I was putting 22,000uf at 100volts in a 400. Some would fit, some wouldn't.

 

[laatsch55]

BTW, anything that takes out D10, will also take out the B- pico fuse on the backplane board...

 

[Gepetto]

BTW, anything that takes out D10, will also take out the B- pico fuse on the backplane board...

It did its job then Lee.

 

[laatsch55]

Yes it did. The front end was still intact. First time that's happened with a diode open at D10.