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Thanks Joe - Just to confirm then, for the LED board, this is correct: Pad1: Red (right channel) Pad2: White (left channel) Pad3: Black (ground) Pad4: Yellow (AC) Pad5: Yellow (AC) If so, yep, had it wired right. Analysis paralysis, lol. End result is wonky meters (for now).

Question for Joe / @Gepetto or someone on the LED light board. The original PL 400 light board had the wires attached as such in order: Pad1 - Red Pad2 - White Pad3 - Black Pad4 - Yellow Pad5- Yellow On the White Oak instructions for the LED board, the picture in here (...

I did, to no avail... thanks though!

Hi Guys - So, hot off the FedEx truck, got my driver transistors installed. All the others pieces were already in place... WA speaker protection, all new outputs, control board, new filter caps (had to relocate 'em to clear the meters). Biased to 0.35 vDC, singing away. Impressive as all hell...

And thanks to @laatsch55 , we have ignition, lol. Got the drivers installed, amp biased to .350 mvDC, sounds amazing. Now the meters, that's another story. New thread on the way.

Thanks; sent you a PM

Hi Guys - Been a while; circling back to another (early 4-fin version) PL-400 that came my way. Long story short is I'm building it quasi-comp, w/ a new White Oak control board, filter caps, all new outputs from Joe (ON MJ21196G‎). It came to me with the blue LED board installed already. And of...

Hi Mark - I've settled (for now) with the amp controls at 75%, and use the pre to control the volume. So for "quiet" listening at night, I can almost get away with it (the -20 db switch helps as well). But, for rocking out, just crank up the pre. Cheers! Dave

Sorry, been off restoring 2 PL-4000's and the PL 500 tuner in the pic. I'm a glutton for punishment... those PL-4000's were an insane amount of work; don't advise it. The 700b amp on the left is the one that just got completed, #2 on the right is waiting on the wings... powered on for the light...

Light board now installed... as much as I like the warm white, think I'm going to switch over to the blue LED board... and then get to work on the knobs. May snag some from a 4000 I have for now if I can't get these up to snuff... I did notice the delamination (?) on the acrylic insert... one...

Yep, all good Joe

Just had to torque those transistor bolts down a bit... “ just right”, lol Onto the cosmetics for a bit.

It’s Alive!!! Holy cr@p!!!

So, looking even better... before taking out the transistors and 3rd heatsink, checked on the transistor bolts... a couple of them seemed like another 1/4 to 1/2 turn easily, so gently torqued them all back down. New fuse, brought slowly back up on the variac/dim bulb, and all appears well :)...

Adding a shot of the blown fuse - both look like this ... soft blow (?)