Re-biasing my Marshall - Jemsite
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post #1 of 2 (permalink) Old 12-28-2000, 02:28 AM Thread Starter
Join Date: Dec 2000
Location: Singapore
Posts: 62
Re-biasing my Marshall

Can anyone tell me a detailed process on how to rebias my 50W Marshall super lead. It's really old abt 30+ yrs and I dun want to blow anything...moreover going to a tech here costs a bomb
firegarden is offline  
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post #2 of 2 (permalink) Old 12-28-2000, 01:48 PM
Join Date: Dec 2000
Posts: 554
Re-biasing my Marshall

* * You need a tool like the 'Bias King' or a similar instrument to fit into the power tube plates and take voltage readings. You also need to know where the bias trim pots are and how to adjust them.

* * *I'm looking into this myself as I'm sick of paying big $$$ every time my Marshall has a problem. I'm going to get the book 'How to Service and Repair Your Own Tube Amp'.

* * * * * * * That said, you obviously don't want to go poking around a tube amp without knowing EVERY safety precaution to be taken. Tube amps can kill you, even when they're not plugged in. If you even have the slightest doubt it's better to spend money than to conduct voltage with your body. *Good luck and be SAFE!!!
jeff l is offline  

tube amp , tube amps

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