WOPL 400 Build Problem!

[nadude98]

Damn, and I just got married.... tsk tsk NavLinear

 

[laatsch55]

Yep, and now it's tme to check the resistors on the BACKPLANES.......

 

[nadude98]

Yep, and now it's tme to check the resistors on the BACKPLANES.......

I meant to say:

Yes, and I also checked the resistors that Joe had me check on the 14_20. I have checked and rechecked the backplanes.....

 

[nadude98]

I meant to say:

Yes, and I also checked the resistors that Joe had me check on the 14_20. I have checked and rechecked the backplanes.....

I just quadruple checked.... all test at correct resistance!

 

[laatsch55]

Now is when a scope would be handy....

 

[Northwinds]

Casta is French - she knows about Big Bone Lick.

Geezuz....

 

[nadude98]

Now is when a scope would be handy....

I think I said that.......LOL

 

[nadude98]

Bump

 

[laatsch55]

We haven't forgot ya...have you reversed the cables coming from the pre amp to make sure it's not the pre?? It might be a good idea to check for DC on the pre amp outputs.

 

[Billboard]

No expert... but may want to look at post 103, and post 110 again. How much should the rail DC drop on heavy base?

 

[laatsch55]

A wounded output can do that too....

 

[laatsch55]

Is that a White Oak cap kit??

 

[nadude98]

Is that a White Oak cap kit??

Yep, a very old one..... I think I put it in over 5 years ago. However the years do seem to blur together. Also have the White Oak led kit, from about the same time period.

 

[nadude98]

We haven't forgot ya...have you reversed the cables coming from the pre amp to make sure it's not the pre?? It might be a good idea to check for DC on the pre amp outputs.

Nope, I tested the preamp on my Carver amp and it sounds fine.

 

[laatsch55]

Do you have a PL service manual? If you do read the part on " Current Sharing test". WE can root out a leaky output with that test, without a scope...

 

[nadude98]

Do you have a PL service manual? If you do read the part on " Current Sharing test". WE can root out a leaky output with that test, without a scope...

Ok, I was reading it. I have a couple of load resistors but they are only 10 watt IIRC. Next I am supposed to drive the channel with 200 Hz input to achieve 40v rms. I don't have a signal generator. How should I go about doing that, and will my load resistors suffice?

I never mentioned this but there is a little bit of a turnoff or turnon thump? I think it's left channel. I will have to check that again. Never really paid attention because it had always had that.

Been distracting myself with a Pioneer A60 amp I'm restoring for the living room...

 

[laatsch55]

No, 10 watts won't get ya off the porch........I use to get my homebuilt 200 watters pretty hot during this test.....

 

[laatsch55]

Ok, I was reading it. I have a couple of load resistors but they are only 10 watt IIRC. Next I am supposed to drive the channel with 200 Hz input to achieve 40v rms. I don't have a signal generator. How should I go about doing that, and will my load resistors suffice?

I never mentioned this but there is a little bit of a turnoff or turnon thump? I think it's left channel. I will have to check that again. Never really paid attention because it had always had that.

Been distracting myself with a Pioneer A60 amp I'm restoring for the living room...

No pics on the A60 restore?????


Turn on/off thump was history with the Rev "C" board, you definitely have a problem......

 

[nadude98]

No, 10 watts won't get ya off the porch........I use to get my homebuilt 200 watters pretty hot during this test.....

Didn't think so.....

 

[laatsch55]

As you can see now, you don't need much for test equipment until you have a problem......especially when it's frequency or power dependent.....