F6 Illustrated Build Guide

[2 picoDumbs]

Hahahaha

I have people on my ignore list. I can't even remember why.
The good old ignore list saves the day.

Hahahaha

 

[Zen Mod]

have one

he said I'm pompous and patronizing

couldn't agree more......

 

[tamra]

I checked rectifier diodes and CL60 no problem.
I set right channel bias 0.25V,bulb turn on dark and LED also dark.
left channel still 0V at R2.

 

[2 picoDumbs]

Tamra

I want you to set Vgs to 2.5V

Do that first.

 

[tamra]

Valve tester is 100W.

 

[2 picoDumbs]

Please understand.
A light bulb tester is not used to bias your amp.

It is used to find faults.

Set Vgs to 2.5V

 

[tamra]

Sorry for messing.
I set every Vgs 2.5V.
Leds are on and bulb is off.
Bias R2 are 0V.

 

[2 picoDumbs]

Awesome

 

[2 picoDumbs]

1) Remove Bulb Tester
2) Put in regular power cord
3) Bias to 0.25V across source resistors
4) Check dc offset

Now increase Vgs to 3 V and check everything.
Then increase Vgs to 3.5 and check everything

Turn each pot a little bit at a time while watching your multimeters

You should have one measuring Voltage across R1 or R2, and the other multimeter measuring dc offset

Let it warm up and check everything is still good

If everything is still good we will proceed to next stage.

 

[tamra]

Ahh,Its been long time...
I appreciate for everything.
Everything working beautifully now.

 

[2 picoDumbs]

Ok
Now bias to 0.65V

Let it sit for 30 minutes, then remeasure bias and dc offset, make small adjustments if required.

Then measure heatsink temperatures

Edit: I am going to sleep now: 2:30 am

 

[tamra]

Set bias 0.65V no problem.

 

[Zen Mod]

well, case positive that someone's OCD is paid of , in the end



( I can call him names, when he's sleeping; when he comes back, tell him that I'm sleeping )

 

[meanie]

Congratulation Tamra!

Time to enjoy your F6

 

[tamra]

Thank you so much Meanie!

 

[2 picoDumbs]

Zenmod
You bloody bastaaaarrrrrrrrrrrddddddddddddd

Going back to sleep

 

[Zen Mod]

can't hear ya Dodo, I'm sleeping now

 

[Yaho]

2 picoDumbs

I connected the WM directly to the power line, no Isolation trans. Humming still! Arggggg! I don't think it's a grounding issue...everything is lifted or floated. But I am seriously wondering if the input decoupling caps are not shielded enough. When i touch them the hum gets louder.

someone's OCD

you mean CDO?

In anycase, I need some of that CDO now!

 

[2 picoDumbs]

Yaho disconnect the earth wire altogether just temporarily
The check again

 

[6L6]

Touching the caps and the hum increasing is a positive verification that you DO have a grounding issue.