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RTR SSR Speaker Protection GB5

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#101
I thought you were referring to the SSR as connected to the SMPS situation as shown a few posts above. If you are referring to Mikebarney’s use of a mains relay to control power on/off of the SMPS 630SO, I think that may or may not work since the tpa3255 15v rail just needs to stay up longer than the HV rail to prevent thump. I do think it would be wiser to use a 12v external signal and relay to activate the “STDBY” logic pin for graceful shutdown.

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#102
No I have a pair of your RTR speaker protectors in a case I am repurposing for the Wolverine with Sami’s Cobra S2 power supply. I will be putting out multiple amps in my living room and was thinking of using a selector switch to control SSR’s for powering the selected amp.
 
#106
Hi X. it's been a while. I have an unused pair of your version 2.1 speaker protection boards - I'll need to remind myself of how to implement them and find the bonus low-cap PS boards, which seem to have gone walkies, but fundamental question first - are V2.1 boards OK to use in an amp with +/-150VDC power rails? I'm not sure when you switched to using the 150V mosfets and a search hasn't provided the answer yet. Cheers.
 
#110
Hi X,

I just been referred by other member about your speaker protection, going straight to the question, I just finish to built a Tim Mellow OTL tube amplifier with +/-150 vdc power rail and as you know OTL are not using output transformer making the life of speakers in danger in the case of failure of one of the power tube 6C33C, in the original schematic there is already some form of protection but really not so safe, so do you think your RTR SSR can be combined with this tube amp?
Thank you

Acky
 
#115
Actually, the bonus board with transistors is not the low cap PSU but a logic driver board to activate the on board open collector gates. The low cap PSU was with the next Gen.

Easy to make though. 2 diodes for half wave bridge, 10uF cap, LED and resistor to indicate power on. Schematic somewhere.

@kissabout2002 - if 42Vpp this SSR board will work perfectly fine.
 
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