phase linear 400

[WOPL Sniffer]

If you have wiring errors, and the wire bundles are all zip tied...... Cmon man....

 

[Gepetto]

Gene, I believe Steve has found a wiring error and did a great job identifying it. I think there's two ways to wire these backplanes. Run long wires from the right backplane, or "daisy chain" the right backplane to the left with short pieces of wire.
Thought about asking Joe about this several times, but never got around to it.

Pretty sure you asked George.

If you want the best possible channel separation, run the separate lengths given in the wiring list. If you don't care about channel separation, you can daisy chain them.

Most care about achieving the best possible separation and performance.

 

[George S.]

Got it. Getting old. Hard to remember. Thanks.

 

[gene french]

Gene, I believe Steve has found a wiring error and did a great job identifying it. I think there's two ways to wire these backplanes. Run long wires from the right backplane, or "daisy chain" the right backplane to the left with short pieces of wire.
Thought about asking Joe about this several times, but never got around to it.

you know....i wondered about that...and i think maybe i know why....
if there is a dead short in the second board in the daisy chain....it would fry the first board too....
where as if he pulls the inputs off of the source....you would only lose the second board...
for whatever my opinion is worth....
lol

 

[gene french]

Slow down and check all your wiring. One at a time and bounce it off the docs..... That would be a catastrophic failure and I'll have to hit you with the other Marvin the Martian pic..... The dreaded:

View attachment 67331

you got it boss man....
i am trying, trying...
i see that music man caught one....wow....
how in the hell do i miss this stuff....
well, i did....so...i will fix it tomorrow...
and i reran that black wire as you wanted it mr. george....

 

[gene french]

Gene
Not talking about the Fuses, I think you wired to the output and should be wired to the Input.

i see....THANK YOU SO MUCH FOR SPOTTING THAT....
you have a good eye for this....
i got a good case of stupid...
lol
well, i will get over it...dust off...
onward...
thank you kind sir...

 

[gene french]

man....i just had a mini stroke...
i was looking over my wopl in the other room....with the main rig in the sala playing kitty, daisy, and lewis...at a nice volume...
when i heard an amp scramble....my heart hit the floor....NOOOOOO....
ran into the den....when i heard daisy say....
hang on a minute....we are experiencing technical difficulties with the bass amplifier....
i need to fo change my underwear....

 

[gene french]

man....i just had a mini stroke...
i was looking over my wopl in the other room....with the main rig in the sala playing kitty, daisy, and lewis...at a nice volume...
when i heard an amp scramble....my heart hit the floor....NOOOOOO....
ran into the den....when i heard daisy say....
hang on a minute....we are experiencing technical difficulties with the bass amplifier....
i need to fo change my underwear....

i need to GO change my underwear....lol
tired....tooo many mistakes...

 

[WOPL Sniffer]

you got it boss man....
i am trying, trying...
i see that music man caught one....wow....
how in the hell do i miss this stuff....
well, i did....so...i will fix it tomorrow...
and i reran that black wire as you wanted it mr. george....

Seems like you are working morning noon and night on your amp and that can be a big source of mistakes. Limit yourself on the time you work on it, give your brain a break. I still say you are in a hurry. I can only imagine the stuff we CAN'T see, like the underside of the back planes. Pray pray PREY!!!

 

[gene french]

Seems like you are working morning noon and night on your amp and that can be a big source of mistakes. Limit yourself on the time you work on it, give your brain a break. I still say you are in a hurry. I can only imagine the stuff we CAN'T see, like the underside of the back planes. Pray pray PREY!!!

yes sir mr boss man...i am not in a hurry...cant finish till i get the bias transistors from joe..
maybe obsessed would be a better word..
there are many pics in this thread...here are two more...

 

[WOPL Sniffer]

yes sir mr boss man...i am not in a hurry...cant finish till i get the bias transistors from joe..
maybe obsessed would be a better word..
there are many pics in this thread...here are two more...

Obsessed, in a hurry, the results can be the same.

Those pics don't show the wires coming through the back planes. The solder side of those boards are the most important.

 

[gene french]

Obsessed, in a hurry, the results can be the same.

Those pics don't show the wires coming through the back planes. The solder side of those boards are the most important.

no doubt...
i will look for more pics

 

[WOPL Sniffer]

Your next project. If you pass, you can move on to Operation and Mouse Trap.

 

[gene french]

Your next project. If you pass, you can move on to Operation and Mouse Trap.





View attachment 67336

now that is cold....
lol

 

[mr_rye89]

 

[gene french]

Gene
Not talking about the Fuses, I think you wired to the output and should be wired to the Input.

rechecking wires this morning...
i was right...
left and right fused b-_in and fused b-_in are NOT the same...according to the docs...
i dont think i missed this time...lol

 

[gene french]

good morning to all...
one of our parrots waiting for breakfast this morning...

 

[gene french]

rechecking wires this morning...
i was right...
left and right fused b-_in and fused b-_in are NOT the same...according to the docs...
i dont think i missed this time...lol

* fused b-_in and fused b-_out

 

[gene french]

Gene, I believe Steve has found a wiring error and did a great job identifying it. I think there's two ways to wire these backplanes. Run long wires from the right backplane, or "daisy chain" the right backplane to the left with short pieces of wire.
Thought about asking Joe about this several times, but never got around to it.

according to my docs..i am not wrong...but it looks strange to me...
maybe joe can verify for me...

 

[Gepetto]

rechecking wires this morning...
i was right...
left and right fused b-_in and fused b-_in are NOT the same...according to the docs...
i dont think i missed this time...lol

Correct, there is too much congestion in the lower left hand corner of the LEFT backplane so the B-FUSED comes from the lower right corner instead to make it less congested. Those are equivalent points except for the silkscreen labeling.