Photo request: Mark IIC+ preamp circuit board

jrb32 said:

RP10A IIC+ Schematic: https://drive.google.com/open?id=1dyC8zXSQ8Ta8Gg-TDZPpQb3j4_4PnjHk
RP10A IIC+ Board Layout: https://drive.google.com/open?id=1Z0-2LdLlP0GLd5otlq_kVX8XQX49nUWV

I'll do the RP11 soon. For differing values check this one:

IIC+ General Schematic with various component differences listed as much as I can:

https://drive.google.com/open?id=1ieTnMLeSiNDoXu_9Or0ky2RIDwbLAcUQ

Should help anyone out there do maintenance if needed on their amp, but if you can send it to Mike B as always.

If you want to build a IIC+ clone board you should be able to figure it out from this.

Cheers,

Jon

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woodbutcher65 said:

Don't even think about putting the tantalum caps in. There is no such thing as a tantalum capacitor that sounds good and when they go bad they become hard shorts.

Put in electrolytics instead, best of all, non-polarized ones.

Mesa uses those awful tants only because they are cheap and they offer a large amount of capacitance in a small package. They're still hot garbage.

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jrb32 said:

All IIC+s have military sealed tantalums on the cathode caps and an important .22uF one in the lead circuit that should be a T110. Are you really saying IIC+s sound bad and you would rip these out of a IIC+ ever came into your workshop and replace them?

I'm going for authenticity here. So would Mesa if they still had RP10/RP11 boards available. Stick with the original parts if you want it authentic. If I bought a IIC+ that had the wrong type of components I would correct it 100% without question regardless of how much of a POS tant caps are. The hermetically sealed ones seem to be fine I haven't seen any fail on me yet.

$ 4000 C+ on E-Bay



Mark IIC+ and Thiele's FS SOLD

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