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Messages - Barnsley Boy

#1
Amplifier Discussion / Re: Marshall BC184 Transistors
September 17, 2023, 02:36:36 PM
Cheers Mick,

I'll continue the hunt for some genuine 184's. (I'll use your squared paper idea off the Marshall Forum!! Yep it's that damn Bass 12 again!)

Paul.
#2
Amplifier Discussion / Marshall BC184 Transistors
September 17, 2023, 08:19:54 AM
Hi All,

I need to get hold of some BC184's for my Bass 12. The schematic just says BC184, the components are also labelled the same. Can anyone tell me what the difference is between a straight 184, 184B, 184C, 184LC .... and any other letter?

Thanks.
#3
Quote from: Marshall_Lead12Guy on August 22, 2020, 10:16:44 PM
I'd love to get this figured out.

I know this post was some time back, but I have a Bass 12 with exactly the same problem. It is driving me nuts! Did you ever get it figured @Marshall_Lead12Guy?

I've posted here:

https://music-electronics-forum.com/forum/amplification/guitar-amps/maintenance-troubleshooting-repair/937816-1980-s-marshall-bass-12-hum-problem

and here:

https://www.thefretboard.co.uk/discussion/210064/marshall-bass-12-repair-help/p1

about my experiences, and I'm still none the wiser. I've managed to reduce the hum down by replacing R17, and as you can see on the fretboard posts, there is a Japanese chap who had the same issue. It's still not fixed though, so not sure what to do next. Any assistance/ advice would be much appreciated.

@Enzo as a Jedi master in all things of this nature ( in the past you helped me out with some advice on my Peavey Classic VT) do you have any thoughts on what could be the problem?