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SST 01 Rev 1

Started by Esprit, November 16, 2024, 02:58:49 PM

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Esprit

heaveno Folks very new to this forum

After two years of uninterrupted service, Relay K2 fails to latch.
When power is applied the points continuously bounce, is there a fix.


perandersSMF

First of all (if possible) use a 24 V source with current limitation. It's much safer not having live voltage.

Connect 24 V across the DZ1 zener or similar point. Start with T3 and go backwards. What is the base-emitter voltage on T3? Should be 650 mV and the collector-emitter voltage less than 200 mV.
/Per-Anders Sjöström, owner of this forum

Homepage with my DIY hifi stuff

Esprit

Please accept my apologies for the delay in answering (I am waiting the return of my bench power supply)

perandersSMF

No worries. Take your time.
/Per-Anders Sjöström, owner of this forum

Homepage with my DIY hifi stuff