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Old 9th March 2005, 05:26 PM   #1
MikeW is offline MikeW  United States
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Default ksa-50

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Old 9th March 2005, 05:27 PM   #2
MikeW is offline MikeW  United States
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Old 9th March 2005, 05:31 PM   #3
MikeW is offline MikeW  United States
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Old 9th March 2005, 05:48 PM   #4
MikeW is offline MikeW  United States
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Jan and Troy thanks for the board. K-amps thanks for the transformer. Bias 600ma, rails 35 volts
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Old 9th March 2005, 05:50 PM   #5
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What about it?
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Old 9th March 2005, 05:54 PM   #6
MikeW is offline MikeW  United States
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Just wanted to post a few pictures with the boards from the group buy.
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Old 9th March 2005, 05:57 PM   #7
K-amps is offline K-amps  United States
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Hey Mike's KSA-50's up and running! Good for ya. How's the sound? Tell us more.

Whats your emitter resistance and the voltage across each one in mV?

Bill I think Mike wanted to begin a new thread for completed KSA-50's because the KSA-50 PCB thread is kind of long now.
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Old 9th March 2005, 06:32 PM   #8
MikeW is offline MikeW  United States
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The emitter resisters are .1 ohm, 30 mv across each one. I had them as high as 75mv but I could not touch the amp after about an hour. The amp sounds better than expected. Not as nice as the Aleph in the midrange, but much more punch in the low end.

Fred thanks for the heatsinks.
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Old 9th March 2005, 06:41 PM   #9
K-amps is offline K-amps  United States
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75mV is 81 watts class-A with 160 watts idle dissipation.

30mV is only 13 watts pure class-A but with 60 watt dissipation.

for 50 watts pure Class-A, 59mV is needed. But as you say, we dont know if your heatsinks can take it. Also these calcs were done assuming you have 3 output pairs, I see 2 in your pics...

I am curious, how did the mids sound with the 75mV setting?
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Old 9th March 2005, 06:57 PM   #10
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Quote:
Originally posted by MikeW
Jan and Troy thanks for the board. K-amps thanks for the transformer. Bias 600ma, rails 35 volts

Your very welcome. Thank YOU for the pictures.

So how is it setup? Source, cables and speakers? You mention midrange but what is the associated equipment? I thought I advised people NOT to use it with the Bozo AM-5 speakers. :-)

I AM JOKING.....

Thank you again for the pictures and reinvigorated enthusiasm..
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