Are these ripple values normal/acceptable

[plumsolly]

I built a 300v/12.6v power supply from a kit. Here are the schematics:

The heaters are raised by something like 1/3rd of B+.

And here are some scope shots.
Heaters to ground:

B+ to ground:

Heater + to Heater - was negligible.

Values on the scope are peak values.

Thanks for your input.

Ben

 

[ruffrecords]

What load did you have on each supply?

Cheers

Ian

 

[plumsolly]

What load did you have on each supply?

These scope shots are unloaded, but it looks the same when hooked up to what I am powering.

Thanks,

Ben

 

[ruffrecords]

What load did you have on each supply?

These scope shots are unloaded, but it looks the same when hooked up to what I am powering.

Thanks,

Ben

Then there must be something wrong with the B+ supply. That's far too much ripple. I am not familiar with the particular configuration of using a current regulator before a voltage regulator. At fist sight is looks like the voltage reg does not have enough voltage drop to work with. What is the voltage between  in an out of the LT1085?

Cheers

Ian

 

[zebra50]

Looks like Glass Audio drawings.

If you bought it directly then it might be worth dropping John a line - he has been very helpful in the past.

Cheers!

Stewartr

 

[plumsolly]

I have ~345V at both the in and out pins of the LD 1085 referenced to ground. I have ~343 at the adjust pin. I guess it is blown? It does not seem to be regulating at all.

Looks like Glass Audio drawings.

If you bought it directly then it might be worth dropping John a line - he has been very helpful in the past.

Cheers!

Stewartr

Thanks Stewart. It is and I did. I will email him.

Thanks,

Ben