Hi, of corse hardcore diy, case is the easyest part to make.
input selector board isn´t build yet, needs some time. Also remote corntrol and more advanced firmware.
The gain stage is Nelsons BZLS as descibed on passdiy, but double sided PCB, upper layer shielding. Rectifier is made with MBR10100.
Everything will be as simple as possible, only XLR, no RCA, only 2 sources.
For the MC and volume section i started to write documentation, but it also is work in progress.
http://home.arcor.de/dddddd-/relais/relais.html
input selector board isn´t build yet, needs some time. Also remote corntrol and more advanced firmware.
The gain stage is Nelsons BZLS as descibed on passdiy, but double sided PCB, upper layer shielding. Rectifier is made with MBR10100.
Everything will be as simple as possible, only XLR, no RCA, only 2 sources.
For the MC and volume section i started to write documentation, but it also is work in progress.
http://home.arcor.de/dddddd-/relais/relais.html
nice
I notice you don't have dual mono supplies, but what's this? Have you added a couple of slabs of metal next to the PS heat sinks and behind the diodes? Interesting! I am making one very close to yours (without the pic) but you are far ahead of me. Have you thought of using quad relays? I am using NAIS D4 series, I figure one per input.
I notice you don't have dual mono supplies, but what's this? Have you added a couple of slabs of metal next to the PS heat sinks and behind the diodes? Interesting! I am making one very close to yours (without the pic) but you are far ahead of me. Have you thought of using quad relays? I am using NAIS D4 series, I figure one per input.
lgreen,
I have only one power supply for for the BZLS, i don´t think wit a class a design preamp and a 160VA powers supply a dual one would make difference, and it would be much more expensive. I try to build without spending more money as necessary.
There was no quad signal switching relay offered at the companys i buy from. The Takamishawa is i´m sure a good one and about 2€ each. I did see it in audio equipment for this purpose.
Also the design is versatile for balanced and unbalanced, i made a BOZ with ADC0804 volume control and these relais. But the ADC0804 has the disadvantage of holding a volume setting not so stable as a counter/pic. You can´t use 8 bit, and you cant make such things like startup volume level programming, remote control, if you need( i don´t) LCD and menu stucture for volumue and source control with one rotary encoder etc.
And a Pic is for some reasons the cheapest solution.
At regulator heatsinks i glued a second heatsink because 100°C was too much. The rectifier diodes are mounted on half an old 80486 heatsink each side, not because they need in this applikation, but beause i build them first for testing a schottky rectifier. They would also work in an alephx i think...
I have only one power supply for for the BZLS, i don´t think wit a class a design preamp and a 160VA powers supply a dual one would make difference, and it would be much more expensive. I try to build without spending more money as necessary.
There was no quad signal switching relay offered at the companys i buy from. The Takamishawa is i´m sure a good one and about 2€ each. I did see it in audio equipment for this purpose.
Also the design is versatile for balanced and unbalanced, i made a BOZ with ADC0804 volume control and these relais. But the ADC0804 has the disadvantage of holding a volume setting not so stable as a counter/pic. You can´t use 8 bit, and you cant make such things like startup volume level programming, remote control, if you need( i don´t) LCD and menu stucture for volumue and source control with one rotary encoder etc.
And a Pic is for some reasons the cheapest solution.
At regulator heatsinks i glued a second heatsink because 100°C was too much. The rectifier diodes are mounted on half an old 80486 heatsink each side, not because they need in this applikation, but beause i build them first for testing a schottky rectifier. They would also work in an alephx i think...
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