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-   -   Aleph P 1.7 rate of RELAY_VOLTAGE (http://www.diyaudio.com/forums/pass-labs/778-aleph-p-1-7-rate-relay_voltage.html)

Miles Teg 23rd September 2001 09:55 PM

In the Aleph P 1.7 power supply board. Whate is the value of the RELAY_VOLTAGE? 48 V ? Or double ?

I'm always working on Aleph P 1.7 PCB, I see the end, but I've got always probs with relays anc command...

tortello 24th September 2001 10:35 AM

Hello Miles,
as I can see, the relais rail voltage is about 60V.
If we deduct the "control" mosfet Vdg, we obtai about 55-56V.
From the schematic, I suppose a series connection of two relais (left+right), but I'm not sure: the Aleph P "1.0" manual shows it clearly.
I found on RS Components catalogue only one 48V "signal" relais, this is suitable from about 33V to 66V, but "our" 56V are to be halved: maybe 28V for ultra-low switched currents are enough?
Maybe Pass did it, to extend the relais life?
I don't know....
Tortello


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