[Amps] Relays

[Paul Kelley N1BUG]

Greg - AB7R wrote:
> Can someone tell me what the extremes are on typical t/r relays in amps?  Many 
> newer amps seem fine with a 10ms delay from keydown to RF.  I'm wondering if there 
> are amps that are even quicker than this and what some worse case scenarios are 
> with older amps.

I think you are asking about "store bought" amps, which I can't 
address. Certainly for homebrew amps using smallish vacuum relays it 
is easy to get in the 4-5ms range or less. As has been mentioned, 
RJ1A or HC1 relays typically switch faster than that without any 
speed up techniques being employed. My amps using RJ1A's are ready 
in 2ms using slightly higher than rated power supply voltage with 
the appropriate series resistor.

73,
Paul N1BUG