Mainline -Voltage test

bergurbrag · 2135

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Offline bergurbrag

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on: April 27, 2023, 06:24:59 AM
Dear Mr. Brikeland

Can you please help me with the following:

I live in a country with 230 V AC. Iceland.
These are the numbers from page 88 from the Mainline manual
Can I use these numbers and if not what are the right ones ?

+275VDC on the Power Supply Board: 275V DC
+6.3vDC on the Power Supply Board : 55-65 V
-6.3vDC on the Power Supply Board: 50-60V
IA on the A side CAS Board : 275V
lA on the B side C4S Board: 275V
Breg Regulator Board (both sides): 220V
-reg Regulator Board (both sides) : 0V
Kreg Regulator Board (both sides) : 8-12V

Also Biasing from page 89:

Can use these numbers and if not then what are the right ones?

Leave the black probe attached to terminal 7. Read the voltage at terminal 20. Adjust the B side trim potentiometer until your meter reads 145VDC. Move your red probe to terminal 30. Adjust the A side trim potentiometer until your meter reads 145VDC

With Regards,

Bergur Bragason



Offline Paul Birkeland

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Reply #1 on: April 27, 2023, 01:30:19 PM
If you set the power transformer for 230V AC (which is covered in the manual), then that accounts for the different mains voltage in your country.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline bergurbrag

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Reply #2 on: April 27, 2023, 10:13:46 PM
 Thank you !
I will post some other questions. Should I start another conversation or should I post it here?



Offline Paul Birkeland

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Reply #3 on: April 28, 2023, 06:03:59 AM
You can just post them here.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man