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We've been kicking around the best way to go about making up a kit of parts for the fully shunt regulated mod for Paramour IIs with the MQ iron upgrade. I'd like to keep the cost as low as possible on this one, and one way to do that is to reduce our labor. The biggest consumer of my time on this kind of thing is writing a manual. Since this is a pretty advanced circuit and I suspect we not not sell hundreds of them, I have decided to offer it as a kit of parts plus a schematic and a photo or two of the mod installed on my own Paramour IIs. If the community is up for supporting each other on the installation so that I don't have to spend a week writing and photographing "Disconnect the red wire from terminal 11. Install a 158K ohm 1/2 watt resistor as shown in the photo" etc., etc. I can put out this kit of parts for two shunt regulated/C4S PC boards, new cathode resistors for the 45 tubes, two 6CM7 tubes and a bit of extra wire for $99.This will be a "production run", that is, I will do a limited number of kits based on how many orders I receive by Friday.
One critical thing to note here is that the 6CM7 driver has lower gain than the 12AT7 used in the stock circuit. So you will find that you need to turn up the level controls on your Foreplay a few notches after the installation. If you are using another preamp besides the Foreplay be sure that you have enough headroom (i.e. clicks above your typical level setting) left on your volume control to drive the less sensitive amp. Figure that you will need to be able to set the level 6dB higher to be on the safe side.
The question has already come about if this kit can be fit into older versions of Paramour. This is a better topic of discussion for here on the forum than for me to address with an individual. That way we all benefit from the sharing of information. PJ has summed up the necessities pretty well in the linked post.
Edits: 06/05/07Follow Ups:
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