Gb: F5 Pcb

[cviller]

Originally posted by specialidiot



I am using 15000uf and 50v.

Thanks for the reply.

Then you should be safe.

[samoloko]

anyone got measured rails with load and no load
I got 25 Vdc no load and 22 Vdc with 2 F5 amps at 0.5 V bias

[specialidiot]

Originally posted by cviller


Then you should be safe.

Thank you cviller, I appreciate the reply. I knew I'd bring it down a bit under load, but 29vdc seems high to me.

What is the correct gauge of wire to use for the power connections? I have 16 ga on hand.

[labjr]

Originally posted by specialidiot



Thank you cviller, I appreciate the reply. I knew I'd bring it down a bit under load, but 29vdc seems high to me.

What is the correct gauge of wire to use for the power connections? I have 16 ga on hand.

"00" gauge !

Seriously, the transformer secondaries look like 16-18 gauge I would think that's enough.

[Tea-Bag]

Originally posted by samoloko
anyone got measured rails with load and no load
I got 25 Vdc no load and 22 Vdc with 2 F5 amps at 0.5 V bias

Mine are ~ 22-22.5v loaded.

[samoloko]

The posted drawings from http://www.diyaudio.com/forums/showt...65#post1814765 and http://www.diyaudio.com/forums/showt...74#post1814874 are wrong - reversed polarity of the lower bridge

here corrected drawing

[bobodioulasso]

I just found this nice thread about star grounding.
Hoping it can help.
http://www.diyaudio.com/forums/showt...93#post1403793

[na]

Hello CViller,

Just bought 2 F5 boards, and one PSU board by paypal.

Couldnt not send you email because i am newbie here..

Best regards,

-Niko from finland.

[cviller]

Originally posted by na
Hello CViller,

Just bought 2 F5 boards, and one PSU board by paypal.

Couldnt not send you email because i am newbie here..

Best regards,

-Niko from finland.

I got your order and paypal - thanks. My weekend is busy, but I'll send the boards on monday.

[alazira]

Originally posted by specialidiot



Thank you cviller, I appreciate the reply. I knew I'd bring it down a bit under load, but 29vdc seems high to me.

What is the correct gauge of wire to use for the power connections? I have 16 ga on hand.

Hi,
This was my 1st amp build (thanks N. Pass, C. Viller for boards, and U.Dailey for step-by-step power supply pictorial) and I bought my 1st multimeter and variac. I put everything together, plugged it in and slowly turned up the voltage to 125. I was very happy to see the little led lights glow. When I first measured the rails they were 29vcd!
Some things I thought were perhaps my toroid was incorrectly labled (antek 300va 18x18) or my variac was defective. I had to turn it down to 105 volts to achieve 24vdc rails. My initial reading across r11 was 0. After p1/p2 adjustment my rails were 25 at 120volts and generally I have measured 22 to 23.5 average off the mains.