[Amps] keying issue resolved

[Jim Garland]

Better be careful, Brian! Most AC solid state relays use thyristors for 
switching and depend on the zero crossing of the AC load to switch off. 
In other words, if you try to use one of those relays to key a DC 
voltage, such as in the 30L1, it will key up the amplifier but won't 
turn it off when the control voltage is removed. Also, if I recall 
correctly, some solid state relays have minimum load requirements, which 
you might not reach with a big 30A power relay. Personally, I think you 
need a better solution than what you're intending.
73,

Jim W8ZR



On 12/28/2016 7:17 AM, ka9egw at ka9egw.com wrote:
> My sincere thanks to all who responded.  After serious consideration I got
> inspired to keep it simple-a 240VAC 30A solid state relay with the low side
> of the 3-32VDC input pulled to ground by any of several radios will
> facilitate keying the +160VDC-keyed-line 30L-1, and also the
> 6.3VAC-keyed-line Hunter 2000C [which some say is the amp the 30L-1 could
> have and should have been], and also the Dow-Key relays on the Heath
> Warrior.
>
> Thanks to all who responded!
>
> 73, Brian KA9EGW
>
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