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Old 12th May 2006, 06:38 AM   #31
lykkedk is offline lykkedk  Denmark
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Work still in progress, with my BoSoZ.

What do you think about my inputselector ???
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Old 12th May 2006, 08:39 PM   #32
steenoe is offline steenoe  Denmark
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Hi Jesper. Great idea putting that input selectorboard on top of the RCA's and solder them directly to the board I really like your heatsink arrangement for the resistors also. That preamp of yours is turning out pretty good indeed

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Old 14th May 2006, 06:24 PM   #33
lykkedk is offline lykkedk  Denmark
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Thanx...

Well I think if everything work's, in next weekend, I will finish it, so that I could listen to it again ;-)
I then have to get, some new screw's for the front/rear - plate's, and some 'spikes' for the feet's.

Here is a picture, of how far I got until now.

I use 3mm 'blue' led's, to indicate the input-selection. My INPUT-1, goes through normally-closed relay, so that it's non-energized with this input. On the 3 remaining input's the relay's is ON.
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Old 20th May 2006, 07:18 AM   #34
lykkedk is offline lykkedk  Denmark
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Thank you all for helping.

I am now done with my project, also I have updated my website, with new picture's --> CLICK HERE <--
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Old 6th September 2007, 07:31 PM   #35
lykkedk is offline lykkedk  Denmark
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I took this old thread of mine, to ask a quistion about singleended input to balanced output.

I have been using my Unbalanced Bosoz, just with a short at the - IN, for my old (build 2001) LeachAmp. After finishing up my 2x F4 monoblock's today i descided to try my bosoz in balanced operation.
I have never tried this before, so i placed the 100K ohm's resistor at the - IN which was missing and shoot in 1vac 100hz sine wave...
The top picture shows the input at the bosoz, without any attenuator attached. I adjusted the scope so, that the sine was in the middle, and the V/div to 2V.
The middle picture shows output, either between GND and +Out or between GND and -Out, no difference.
The last picture shows the probe connected between +Out and -Out, swinging 10V

I never thought that it would double the swing, i think it could drive the F4 in balanced mode real good (not to clipping ofcause)...
---> How much will the F4 need to be feed before clipping 30V ? ~ 40V ? sving.

I have posted a larger picture at my web-site Go and click on the link BosoZ scope test. You can click on the picture on the website to make it even bigger!
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