How to convert S5 K-12g kit to dual mono? - diyAudio
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Old 10th January 2007, 04:23 PM   #1
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Default How to convert S5 K-12g kit to dual mono?

I would like to build the S-5 K-12g tube amp kit (formerly the K-12m). This will be my first kit, so I'm kind of clueless. The kit is at:

http://www.s5electronics.com/tube.html

more info here:

http://www.siteswithstyle.com/VoltSe...Push_Pull.html

Anyway, I'm interested in modifying the kit to be run as a dual mono design. Is this possible? What would it take? Would I be better off buying two of the mono kits (and connecting them both to the same pot) or buying one of the stereo kits (and buy another power supply)?

Thanks!
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Old 10th January 2007, 07:36 PM   #2
aerius is offline aerius  Canada
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It's possible to modify it, but that'll take so much PCB hacking and rewiring that you're much better off buying 2 mono kits in the first place. I have the kit and I've hacked the PCB myself doing all kinds of power supply & circuit mods, it's not fun.
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Old 11th January 2007, 04:24 AM   #3
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Thanks for the help. So if I buy two mono kits, send one channel of input to each, and wire the same potentiometer to handle both of the kits, is that all I need to do?
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Old 11th January 2007, 06:42 AM   #4
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Do you want to strap the stereo kit into a mono amp so you get 16W instead of 8W?
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Old 11th January 2007, 01:57 PM   #5
Sherman is offline Sherman  United States
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Quote:
Originally posted by downward_dog
Thanks for the help. So if I buy two mono kits, send one channel of input to each, and wire the same potentiometer to handle both of the kits, is that all I need to do?

Yes, except you'll most likely have to buy a new pot since I would imagine the pots in the monoblocks are single units and you need a dual unit to control each monoblock. (You can of course just use the two separate pots controlling each channel separately.)

A good solution for you might be to build a "passive preamp". Just get a dual 100K potentiometer and mount it in a box. Add a 2 pole, 4 position rotary switch and four pairs of RCA jacks. That gives you a choice of four sources. Next take the "output" of the dual potentiometer to another pair of RCA jacks for your output to the monoblocks.
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