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-   -   How to convert S5 K-12g kit to dual mono? (http://www.diyaudio.com/forums/tubes-valves/93875-how-convert-s5-k-12g-kit-dual-mono.html)

downward_dog 10th January 2007 03:23 PM

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!

aerius 10th January 2007 06:36 PM

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.

downward_dog 11th January 2007 03:24 AM

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?

gmilitano 11th January 2007 05:42 AM

Do you want to strap the stereo kit into a mono amp so you get 16W instead of 8W?

Sherman 11th January 2007 12:57 PM

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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