[Amps] SB220 SICK...RELAY

[Roger]

JayKay wrote:
> Thanks to all for your inputs. I am going to try cleaning the relay contacts and watch alignment, etc.
>
> If I can't get it going (contacts beyond repair), I would like to replace the relay but a quick Google shows the KA-3702 relay by PB doesn't exist. 
>   
Go to Mouser and try to find a how ever many pole relay with the same 
ratings and pin out. You might not be able to find a direct pin for pin 
replacement, but that's better than having to rig up something.  If 
you're a CW op this would be a good opportunity to go QSK. However It's 
really difficult to find any suitable US made  vacuum relays any more. 
Word is that many now say "made in China".  I'd probably go for some of 
the Russian surplus vacuum relays.

73

Roger (K8RI)
> My thinking is to grab the 120VDC present in the rig and regulate it down to 5VDC or 12VDC (once I know the resistance of the coil) and then get a 10 amp 3PDT relay. It will also make it easier to interface with newer rigs that don't like 120V switched to ground through their internal relays.
>
> I could use a series resistor (with the R of the coil) to step it down but I don't want to hot switch 120V (at T = 0) to any external relays
>
> 1) Anyone have the KA-3702 relay or a source?
>
> 2) Additional comments?
>
> 3) Relay recommendations?
>
> Thanks
>
> Jay
>
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