phase linear 400

[ABebar]

BTW, where are you placing your meter leads when measuring bias?

I switch between backplane and control board, but they both agree 1:1, so I typically use the TP1 on the backplane.

 

[ABebar]

This bias holds rock steady. I expected it to fluctuate more. Two rows down, going for #3.

 

[Gepetto]

I switch between backplane and control board, but they both agree 1:1, so I typically use the TP1 on the backplane.

And your negative probe? I can’t see on my phone

 

[Gepetto]

This bias holds rock steady. I expected it to fluctuate more. Two rows down, going for #3.

Adding outputs does not really affect bias as long as you set it at 350mV

 

[laatsch55]

Negative probe needs to be on the " output: test point, not ground..

 

[ABebar]

Ooh, my negative lead was absolutely on ground. About to power up row 3.

 

[Gepetto]

Ooh, my negative lead was absolutely on ground. About to power up row 3.

That’s your problem Adam

 

[ABebar]

I figured since ground and bias were the only two test points on the PL14-20 that was obviously my desired test points.
I'm very happy at this moment.

 

[ABebar]

Last row going in. Then I need to finish soldering in the input jacks. Maybe I will listen to Valerie yet tonight!

 

[Gepetto]

I figured since ground and bias were the only two test points on the PL14-20 that was obviously my desired test points.
I'm very happy at this moment.

You learned rule #1 the hard way: It's your test equipment...

 

[J!m]

what does woad mean...someone with speech impediment giving rural directions???

Keep yer tars on the woad son!

 

[J!m]

You probably already know my status. I started tearing into the stock chassis on January 22. Had the stock wiring and boards out and the filthy chassis cleaned up on February 6. Started wiring on February 11. Tried to power on for the first time on March 26. Hit a roadblock on April 9 and stalled out. Now with my trip coming up Saturday, I probably won't get it done until early May. It's been on my kitchen counter for the past three months and still no music.
Not to make excuses, but it's tough to devote too much time to it with a stressful 50 hour per week job, two teenage kids with rehearsals and practices who need to be cooked for/cleaned up after/driven everywhere, a needy girlfriend (don't tell her I said that), a basement remodel I started in January and finished in March, and a list of other hobbies that I need to maintain my sanity. I'm averaging about two to four hours per week into this build. I'll get there eventually.

aounds a lot like my schedule…

 

[J!m]

So, with that reasoning, the smart guys have had the most failures???? BULLSHIT!!!!

smart guys (and politicians) are better at hiding them.

 

[Gepetto]

Last row going in. Then I need to finish soldering in the input jacks. Maybe I will listen to Valerie yet tonight!

Did you Adam?

 

[ABebar]

I didn't hook her up to the system yet, but she's basically ready! Just need to put the covers back on.

 

[ABebar]

Looks like it could use a little meter calibration before closing up.

 

[laatsch55]

All you can do is zero the pointer. .

 

[Gepetto]

It also appears that you need the $145 set of front panel screws from EBay as well

 

[gene french]

It also appears that you need the $145 set of front panel screws from EBay as well

too late...i already snatched those up....

 

[ABebar]

It also appears that you need the $145 set of front panel screws from EBay as well

I actually picked up two sets of rack handles for $40. $40/per pair.