My K10A build

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#21
jacco vermeulen said:


John,

you don't happen to have the DK number handy, before i toss myself over the balcony ?
I gave up on finding a chassis mount 30Vac (or twin 15Vac), so anything will do.
Click to expand...


Whaaaa??

Low power (<20VA) 30V, 15V-0-15V or twin 15V secondary chassis mount (clamp or toroid) transformers are as common as muck over here!

Do you guys have Farnell over there? A few to choose from:


http://au.farnell.com/multicomp/mcfe015-15/transformer-15va-2-x-15v/dp/9531670?_requestid=806733

http://au.farnell.com/multicomp/mcfm50-15/transformer-mini-5va-2-x-15v/dp/9531530?_requestid=806541

http://au.farnell.com/multicomp/mcfm70-15/transformer-mini-7va-2-x-15v/dp/9531602?_requestid=806595

http://au.farnell.com/multicomp/mcfg015-15/transformer-15va-2-x-15v/dp/9532102?_requestid=806655

http://au.farnell.com/multicomp/mcf-b1815f/transformer-6va-2-x-15v/dp/1172356?_requestid=806206

http://au.farnell.com/multicomp/mcf-b1815f/transformer-6va-2-x-15v/dp/1172356?_requestid=806206

http://au.farnell.com/dagnall-elect...mer-20va-2-x-15v/dp/1166183?_requestid=806417

http://au.farnell.com/dagnall-electronics/d3632/transformer-6va-2-x-15v/dp/1166330?_requestid=806481


Similar selection from RS Components too.......
 
#24
Stuey said:


Thanks John. Quite innovative!
Click to expand...

Thanks Stuey. 🙂


jacco vermeulen said:


John,

you don't happen to have the DK number handy, before i toss myself over the balcony ?
I gave up on finding a chassis mount 30Vac (or twin 15Vac), so anything will do.
Click to expand...

Hi Jacco,
I used Digikey part MT2132-ND. This is a dual primary, dual secondary 28VAC, 12VA. It has pins for board mount, but I soldered leads and screwed it in place inside the "black box".
 
#25
KLe said:


Hi John
Just saw your K10A ... wow ... strewth mate, that's a bloody beauty 😎 🙂
Click to expand...

Thanks KL,
Now all I need are the speakers to play this through...


Elektor78 said:
compliments really beautiful ! 😀
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Thank you Elektor,
Not sure what you mean C13/14 comment. Can you clarify?

Very cold here this morning. I can't recall it being this cold before. A good day to DIY! (inside 😀 )

Picture778.jpg


Yes, that's -36*C. 😱
 
#32
Stuey said:
John, where are you located (if you don't mind telling)?
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Canada eh, :up:

My fellow countrymen are embarrassed by my behavior sometimes so I've spared them the shame and took away my location. 😀

Nico Ras said:


If you look up, you will see John looking down.:sarge:
Click to expand...

😉
How's it going Nico? Having a good 2009 so far?

AndrewT said:
It's true!
-40degC = -40degF.

What is the fluid used in a +50degC to -50degC thermometer?
Click to expand...

Hi Andrew,
I'm not sure what fluid is used but the thermometer is broken now. This leads me to the conclusion that it may have been even COLDER than -36!
According to the weather forecast on my email page this morning it is only -27*C today.
Normal for here at this time of the year is a bit warmer.
 
#34
As promised. The tests were run at about 3 watts of output power (into 8 ohms). Both channels were tested at the same time and the results are for both.

First the overall scores. Ignore the stereo crosstalk - the attenuator I use has a common ground so it invalidates that test.

RMAA_K10A.png


Next the THD:

THD_K10A.png


Frequency response:

FREQ_RES_K10A.png


Noise:

NOISE_K10A.png


IMD:

IMD_K10A.png


Not too shabby, what? I'll take it. 🙂
 
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