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Speaking of 5687s...

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A friend of mine has a set of JWWC modified (12 tube) MA-1s that really need more gain, even with an MP-3 preamp. Is there a (relatively) simple answer to this? He won't go for drilling the chassis for 6SN7's, but subbing in a different 9 pin or two with component changes inside would probably be OK.


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Topic - Speaking of 5687s... - frank 19:45:04 01/23/07 (5)

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