Bogen MX-60a tune-up - diyAudio
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Old 28th December 2006, 01:28 PM   #1
apehead is offline apehead  United States
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Join Date: Oct 2006
Default Bogen MX-60a tune-up


Just had a few questions about my baby, the Bogen MX-60a. First, when I turn up the treble and the turn up the high pass filter, it begins to hiss prety loud. Also, at higher volumes it begins to pick up radio stations. The power tubes are no longer 8417's, the amp was retro-fitted for EL34's by the pevious owner. there are also 1/4" input and output jacks, and a bias adjust installed. Other than that, the schematic is accurate. Also, I would like to possibly take the TAPE/MAG input and use it as a overdrive stage for the Mic 5 input (which is the one that controls the 1/4" input). Any advice would be greatly appreciated. I also have a Bogen CHB-100 amp I would like to be made noiseless as possible too.

Thank you,

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Old 28th December 2006, 01:30 PM   #2
apehead is offline apehead  United States
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I'll have to post the MX-60a schematic on my myspace page when I get home... The link will follow.
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Old 8th January 2007, 09:45 PM   #3
apehead is offline apehead  United States
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Default MX-60a Schematics

here we go... I hope
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Old 8th January 2007, 09:55 PM   #4
apehead is offline apehead  United States
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MX-60a schematics
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Old 29th December 2007, 12:07 AM   #5
AngusL is offline AngusL  United States
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Default Bogen MX60A

Thanks for making the schematic available for this old amp. Just bought/traded for one and plan to use it for my guitar. Mostly planned to drive it with my Behringer pedal but now will build some preamp stages and try it without any outboard effects.

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