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Rodec Mixmaster II info wanted
Rodec Mixmaster II info wanted
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Old 20th February 2019, 10:59 PM   #1
pat allen is offline pat allen  Canada
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Default Rodec Mixmaster II info wanted

Hi i do have one very old Rodec Mixmaster II in sad shape that i would like to restore.
Cant find information at all about it. Its the Canadian version (made in canada).

schematics would be nice.

already contacted Rodec.be

thanks.
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Old 21st February 2019, 03:49 PM   #2
pat allen is offline pat allen  Canada
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i managed to revers one of the board "as is" without much component placement to make it logic to understand.
dare to comment and identify the board in and outs ?
there must be an external feedback network or something as there is no logic in there imho.

transistors are BC338, all.

thanks,
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Old 21st February 2019, 03:54 PM   #3
pat allen is offline pat allen  Canada
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one of the boards
there are many of theses in the mixer. two for each channel and two more for the output stage
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Old 21st February 2019, 08:06 PM   #4
pat allen is offline pat allen  Canada
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for the purpose of future searches
pin 1 in
pin 2 feedback
pin 3 GND
pin 4 +vcc (24vdc)
pin 5 feedback
pin 6 out

found out that there is no real limitation in upper frequency unit becomes really unstable above 30khz, lower cutoff is about 25hz....minimalist design, but it worked "ok" back in 1979 i guess. i upgraded all caps, will do the other boards and will test the whole unit soon on a Nikko 220
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