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Old 15th May 2012, 08:40 AM   #1121
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thanks Zenitou now i can read a normal 3,4mv ripple with a 21Vpower rail.
and a 8A shoot on the bridge rectifier at turn on ( thanks to the Soft start!)
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Old 15th May 2012, 04:18 PM   #1122
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Quote:
Originally Posted by Michael Rothacher View Post
I miss Pa. There must be a way to draw him in to this thread. Anyone have anything tantalizing?
Poor babies....

I've been very busy, but I do drop in from time to time.

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Old 15th May 2012, 06:49 PM   #1123
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Aw, what can I say, I had a sentimental moment. We'll soldier on.

Now get back to work. Those amps aren't going to build themselves.
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Old 15th May 2012, 07:00 PM   #1124
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Originally Posted by Michael Rothacher View Post
Those amps aren't going to build themselves.
That explains a lot!

Roscoe
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Old 15th May 2012, 08:59 PM   #1125
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Quote:
Originally Posted by Michael Rothacher View Post
..... Those amps aren't going to build themselves.
don't be so sure ..........

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Old 16th May 2012, 08:36 AM   #1126
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Cables are twisting around each other all the time, just leave them close enough
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Old 16th May 2012, 01:04 PM   #1127
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Thumbs up Anyone wondering.......

Thanks Michael, Generg, Juanitox, Nicoch58 AND Nelson for inspiration!

Tomorrow going to my offshore-schedule! BUT today there for the first time was (and is) sound through this little beast; and what a sound. So fullbody and rich in tonal spectrum. Did not expect that it would be so much better than my ClassDaudio amplifier - but it really shines and fills the room. I have to turn my B1 up to about 40 % to keep the same level as on the ClassD(but that was expected).

I have a couple of unfinished issues still(the big hole you see, as this was originally boxes intended for 3liter wine, that I rebuilt to fit.)

But for now - perfect. May try some other solutions later, but with 12,5 ohm filmresistor and 400 watt on them - and 400 watt/2x35 volt ACtrafo on each monoblock, there is nothing missing.
For the moment......

Best to all and thanks to all!!!

Olav
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Old 16th May 2012, 01:27 PM   #1128
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Olav, thanks for sharing your pictures and description of its sound. We need more of that around here! You guys are too humble!

Looks very nice. Has plenty of air flow, but deosn't take away from the look. It adds to it! You also have a nice spot ready for a meter!
Do the heat sinks get hot?

Thanks,

Vince
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Old 16th May 2012, 01:30 PM   #1129
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Still missing some parts to start building my SIT, I was thinking to try the following output changes. Can we avoid the mid and Super tweet caps if I change the signal polarity trough my pre and connect SIT (-) to (+) of my passive crossover caps (SIT for mid and Stweet only, F5 for the woofer)?
Thanks
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Old 16th May 2012, 02:05 PM   #1130
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Cool Just a short...

Hi Vdi_Nenna!

Yeah - get somewhat hot after 1 hour of playing Bruce Sprinsteens - The goast of tom joad. The harmonica is such that you can feel it is in the room - never heard anything so close to live-music from a amplifier before.

I have some special heat-sink(for the SIT and some of the other resistors inside. The heat on top hasn`t gotten over 28 deg Celcius - on top of the enclosure. But I must try to measure inside when I return home 1 of june.
And maybe move the SIT to a heat-sink on the back. That will give me better space inside. It got really STUFFED inside. Had a plan about keeping it tidy - but you loose when have a fixed box and have to build according to those confined area.

So maybe I will change some later......

Have only 2 hours w/music - and toworrow my copter leaves at 1400 hour - sorry am I...

Best to all - and grateful for all your suggestions!

Olav
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