Musical Fidelity A100

[bob orbell]

Hi all, I am looking for some help with a MF A 100 int. amp. I have just been given, it is is very good cosmetic condition but does not work, these amp's are heavily biased in to class A operation and run HOT I need help with a CD and output transistor type, sadly, I am not at all good with transistors and have only a very basic understanding. I can see that two resistors have had a very hard time, and also some of the small electrolytic capacitors look swollen, I will replace all the cap's with 105c type and all the larger resistors. any help appreciated. BOB

[Richard]

Hi Bob,
This site gives some interesting info,
http://www.markhennessy.co.uk/mf_a1/

edit sorry wrong amp but still an interesting read...

[bob orbell]

Thank's Richard, yes I have seen that, apparently the A100 & A1 are identical apart from the output transistors, and of course the power supply. I realy need a circuit diagram that is readable. BOB

[Richard]

email sent to you Bob.

[bob orbell]

Thank you, most help full, I will post if I get it going. BOB

[bob orbell]

A100 up and running again, the culprit was the bridge rectifier, gone short circuit but need to more tests on the four large smoothing capacitors, sounds very good, if a little soft in the base. BOB