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-   -   differences between K-12M and K-12G kits? (http://www.diyaudio.com/forums/tubes-valves/98605-differences-between-k-12m-k-12g-kits.html)

mnr102 21st March 2007 06:42 PM

differences between K-12M and K-12G kits?
 
Hello,
There are 2 nice pages listing mods & upgrades that can be done to the K-12M amplifier kit. S-5 Electronics is currently shipping a kit called the K-12G. Does anyone know what the differences are?

Thanks,
Mike

gofar99 21st March 2007 07:52 PM

Greetings, The main difference is the tubes. There are two different type numbers however the performance is equal. There are a few diferences between early kits and late kits though. Some early ones may still be for sale from various venders. They are mostly the G version. I believe all M series and most late model G kits have ceramic tube sockets. The early ones were subject to heat damage. There is a slight change in the feedback in late model ones (a small cap to limit HF response above the audio range and help stability). Otherwise the kits are the same (as well as the K502 from some venders).

Good listening
gofar99

joker6211 2nd April 2007 06:43 AM

Hi, is there any new modification on these kits

mnr102 2nd April 2007 03:27 PM

Thanks for the reply. It sounds like then that I can apply most or all of the mods listed on various pages, like VoltSecond.

Runco990 2nd April 2007 04:07 PM

While I'm hardly an expert on the subject, I built one of these as my first entry into tubes. It's a nice kit, and the mods on voltsecond's page are of benefit.

I have the "G" kit with 10BM8 tubes. These are also usable with 11MS8 tubes. Pretty happy with it. But it did get me hooked on tubes and bigger amps. Sigh.... :rolleyes:

Oh yeah... the K12"G" (mine) has ceramic sockets. And it does get HOT! I got mine for $149 plus shipping.

Marc

gofar99 2nd April 2007 09:04 PM

Hi, Yes they do get a bit warm. I was initially concerned with the power trannie too and contacted S-5 about them. They said it was normal. And I guess it is so, for mine has been singing along for nearly a year now. As for more power, it might be nice, but please try to keep in mind that twice the power is not twice as loud. Its logarithmetic. My K-12 plays nearly as loud as my chip amp and has much nicer overload response.

Good listening
gofar99


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