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Old 5th March 2008, 04:21 AM   #1
lpd is offline lpd  Canada
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Join Date: Nov 2003
Location: BC
Default Bogen Front End

I'm looking for some ideas for the front end on a Bogen MO-100A conversion.

I'm rebuilding power supply, converting to EL34 output tubes, but not sure about the 7247 input tube. Any suggestions for a decent input driver stage?

Here's the schematic....

MO-100A

Thanks
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Old 5th March 2008, 05:10 AM   #2
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Hopefully bricktop will find this thread ... I sold him my old MO-200, and he redid it with a 6CL6 differential amp front-end. After tuning the global feedback, he got some great square waves and very low distortion.
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Old 5th March 2008, 05:12 AM   #3
lpd is offline lpd  Canada
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Join Date: Nov 2003
Location: BC
Yep, seen the schematic and consulted him on his build. 6CL6's aren't that easy to find here though. Just thought about trying a more common tube ie: 6DJ8 ect.
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