FS: Marshall JVM 410H w mods MM OT ex condition SOLD

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_actual time_

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SOLD!

Modded Marshall JVM 410H 100-watt head.

Mercury Magnetics output transformer upgrading the stock OT, added Mercury 10 Henry choke, plexi mod (a cap value changed), and negative feedback mod (a resistor value in power section changed). Also gain reduction mod added on OD1/OD2 Orange and Red modes.
 
which resistor value did you use in the negative feedback mod?
 
180k, which IIRC is on par with the value in the JCM800 2203 (176k).
 
cool, and the results? i was thinking in put 150k in mine
 
It gets a bit more hair from the power tubes, from the less negative feedback vs a stock JVM, especially at medium or band-practice sort of volumes. Dirties up the modern high-headroom power section more like a classic Marshall power section.
 
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