marshall JMP Super Bass

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Re: marshall JMP Super Bass

Postby al vintage » Thu Jun 11, 2009 6:39 pm

thanks, now i know how to mount the PT.
I know that's not a very good job, but that was the first time i work on a amp, and it's working good , so i'm pretty proud of me anyway.
Now i'm building a jmp 50w 1987 for a friend, and i hope i 'll make a better job.
al vintage
 
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Joined: Sat May 02, 2009 9:16 am
Location: Bretagne , France

Re: marshall JMP Super Bass

Postby neikeel » Fri Jun 12, 2009 8:54 am

Do not be hard on yourself, it looks perfectly serviceable and if it sounds good, not to worry. A lot of us are hung up on restoration and tidying up amps that have had make do and mend repairs over the years.

Your PT will be ok, you might get a little extra hum with it being lined up that way (should be 90 degrees to OT in stand up mode).

Later you could use the correct laydown PT with the alloy plexi mounting ring to cover the swiss cheese effect where your chassis has been drilled a few times.
Neil
neikeel
 
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Re: marshall JMP Super Bass

Postby al vintage » Tue Jun 16, 2009 8:20 am

thanks neil.
You're right for the hum, and i didn't know from where it was.
So i replace the pt 90° to OT and now there's no hum anymore.
al vintage
 
Posts: 19
Joined: Sat May 02, 2009 9:16 am
Location: Bretagne , France

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