[sachu]

an..that is one fine looking board. Can't wait to get my hands on them. Ordered a par-metal case for my build.

 

[runeight]

I've also added an alternate wiring scheme if you have hum/buzz problems.

 

[studeb]

 
and?????

 

[jdkJake]

 


and?????

and the custom sumr transformer did not make it in time for today.

HOWEVER, Plan B just showed up on my doorstep....

 

[jdkJake]

 

[jdkJake]

 
 
Alex: Please update the schematic to reverse the polarity of the LED on the -30 rail.  Thanks.

 

[jdkJake]

 

 

[ujamerstand]

What's the reading for for the second last image? DC offset?

 

[studeb]

output bias
220mV for Mosfet
1V for BJT
 
Forgot to say, looks great!

 

[studeb]

How much heat is generated idling?
And what heater t/f  are you using?

 

[runeight]

Quote:

Alex: Please update the schematic to reverse the polarity of the LED on the -30 rail.  Thanks.

I think the schematic is ok, but the lack of + sign on the board is definitely a problem. I'll fix this if we have another board run.
 
So, your measurements mean that all the DC voltages came up properly?
 

 

[runeight]

Oh, I see what you mean. That LED shouldn't even be there. There is just one LED that goes under the tube but it uses both resistors. I'll fix.

 

[jdkJake]

 

[jdkJake]

Quote:

I think the schematic is ok, but the lack of + sign on the board is definitely a problem. I'll fix this if we have another board run.
 
So, your measurements mean that all the DC voltages came up properly?
 

 
Yes.

 

[jdkJake]

Quote:

Oh, I see what you mean. That LED shouldn't even be there. There is just one LED that goes under the tube but it uses both resistors. I'll fix.

No, I mean the PS LED for the -30V rail.
 
The cathode/anode orientation for the schematic posted on the web site needs to be reversed. Otherwise, it does not light up. I initially installed it from the schematic.
 
Of course, the inclusion of polarity markings on the board will go along way.