My New Early Model PL400 w/ 4 Fin Heat Sink

[punchback]

Yes I have the docs. Just seemed a little odd to populate it in a diode designator. I'll just follow the BOM.

 

[Gepetto]

All diodes are in the full comp version. It was designed to suit both applications.

 

[punchback]

The next step is done. Watts Abundant relay built and installed. Powered up on the DBT... Bright then dim and THEN a click of the relay after a few seconds. As soon as AC is cut the relay clicks off.

 

[laatsch55]

Doing exactly as it should...,

 

[VSAT88]

Yep, believe me I was a happy camper when mine did the same. If it were not for Lee I do not know if I would have ever gotten there. Same amp still up and running at least a year now.

 

[punchback]

WOA board is built and ready to go. Any advice before I start cutting wires off of the current board?

 

[laatsch55]

Godspeed...................................

 

[jbeckva]

WOA board is built and ready to go. Any advice before I start cutting wires off of the current board?

From the above pic, I see you have a separate ground going to the RCA's. Get rid of that. Run the signal cables directly to the RCA's from the individual L/R input terminals and keep the shield grounds like you have them - tied together and soldered as shown with the ground lugs isolated from the chassis (I think I see the fiber washers behind 'em).

Nice job so far.. keep 'er up!

 

[Gepetto]

WOA board is built and ready to go. Any advice before I start cutting wires off of the current board?

Triple check everything you do. It will pay dividends if you do. If you have questions, ask.

 

[punchback]

No turning back... Like I would want to turn back to the early 70's pcb.

 

[punchback]

Drilled another mounting hole and used the existing lower mount. It seems like the board is kind of tight to the bottom of chassis? What do you think?

Also the TO92 transistor heat sinks touch the back of the meter. I could cut the stand off down by a 1/4" and maybe move the ring terminal on the back of the meter. Seems like there'd be room below the WOA board.

 

[punchback]

Looks like if the mounting Studs move up an inch there's room for wiring and clears the meters.

 

[punchback]

Moving everything up an inch was the ticket for clearance but the input cables are short. I'll have to look for a replacement. Any suggestions? What's in there is a single conductor with a foil shield and drain wire. I think I might have some 1 pair with foil shield and drain wire at work.

 

[laatsch55]

Moving everything up an inch was the ticket for clearance but the input cables are short. I'll have to look for a replacement. Any suggestions? What's in there is a single conductor with a foil shield and drain wire. I think I might have some 1 pair with foil shield and drain wire at work.

That'll work..,..

 

[THD+N]

No turning back... Like I would want to turn back to the early 70's pcb.

Hey, don't knock the 70's...

 

[laatsch55]

Amen Nick....if I could remember some of the 70's......

 

[VSAT88]

There was this dude, Jimmy Carter ???

 

[THD+N]

There was this dude, Jimmy Carter ???

If Jimmy Carter is the first thing you think of when the 70's are mentioned, you might have inhaled...

 

[roccus]

I feel for you one of the most anxious moments of the build is the first time you put power to it....

 

[laatsch55]

That feeling never goes away...regardless how many ya build...