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Discussion Starter #1 (Edited)
I started with a MC240 that had been neglected for years in an old shed.

 

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Discussion Starter #2
This poor things had seen better days.

 

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Discussion Starter #3
The first thing was to give it a really good cleaning. Doesn't look so bad on the underside now.

 

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Discussion Starter #4
The top was pretty bad, so I masked it off and bead blasted it.

 

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Discussion Starter #5
Then some primer.

 

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Discussion Starter #6
Followed by some more masking and then some burgundy paint.

 

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Discussion Starter #7
Now to update the electronics. Replaced the electrolytics and bubble bee caps.

 

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Discussion Starter #8
Next the selenium rectifier had to go. Easy enough with a resistor and diode.

 

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Discussion Starter #9
A little mod for convenience. I moved the fuse to the inside and installed a push button power switch.

 

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Discussion Starter #10
Ready for another 50 years of service. The tubes don't glow that bright. It is a result of a long exposure shot.

 

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Nice work. The MC240 is a classic and a wonderful amplifier. It was designed for horns. Hook it up to some old JBLs, Altecs or EVs and it will sing. :)
 

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I absolutley love watching your builds/mods. You do great work. I am curious how you cleaned it up. Did you use a liquid medium?
 

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Discussion Starter #17
Nice work. The MC240 is a classic and a wonderful amplifier. It was designed for horns. Hook it up to some old JBLs, Altecs or EVs and it will sing. :)
I use it to drive a pair of 1968 JBL C50 Olympus speakers with custom JBL 2397 horns.

 

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Discussion Starter #18
I absolutley love watching your builds/mods. You do great work. I am curious how you cleaned it up. Did you use a liquid medium?
I used spray flux remover to clean the dirt out.
 

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Beauty job. I've always liked the look of that amp. The 3 massive transformers always impress. The JBL's are gorgeous as well.
 
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