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-   -   Musical Fidelity A100 resistors (http://www.diyaudio.com/forums/solid-state/223123-musical-fidelity-a100-resistors.html)

yossy993 8th November 2012 11:34 AM

Musical Fidelity A100 resistors
 
I bought recently A100 which is very bad condition,and am trying to repair power supply circuit. I found out R1 & R2 were faulty and their color code fadeout.

Dose anyone know resistance of R1 and R2 ? I put each 0.47ohm resistor as the same as A1. Now plus minus voltage over 41-volt against
plus minus 24-volt. Input AC100V after through transformer dropped about AC32V. I surely did mistake. Please help.

Is A100 Transformer 2ndary AC32V correct ?

Thank you

christchurch 29th November 2012 07:15 PM

0.47 ohm

Ian Finch 30th November 2012 03:40 PM

Read these pages if you haven't already. The details you want are there. The A1 & A100 are very similar.
Musical Fidelity A1

Adq 9th January 2013 11:17 AM

Quote:

Originally Posted by yossy993 (Post 3233359)
I bought recently A100 which is very bad condition,and am trying to repair power supply circuit. I found out R1 & R2 were faulty and their color code fadeout.

Dose anyone know resistance of R1 and R2 ? I put each 0.47ohm resistor as the same as A1. Now plus minus voltage over 41-volt against
plus minus 24-volt. Input AC100V after through transformer dropped about AC32V. I surely did mistake. Please help.

Is A100 Transformer 2ndary AC32V correct ?

Thank you

Hi yossy993, on my A100 the value of R1 and R2 is 0.33 ohm , the power transformers AC output is 30-0-30 without load , the DC voltage when circuit running drop at 32-0-32 ( instead of being next to 42 V) :p


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