[CQ-Contest] SB-220 Switching help

[Bob, N5RP]

At 08:11 1/26/2002 -0600, Bob Naumann - N5NJ wrote:
>Can any of you tell me how much current the SB-220 t/r relay draws ?
>I know it's a 120v device, but need to know it's current draw.
>Thanks,
=====================>
Measure the resistance of the coil, and, knowing the voltage,  you can then 
calculate the current.

An easy thing to do is:
place a field collapse spike diode across the coil, and mounting the coil 
on a rubber grommet to quiet it's "clunk" down a bit.

Also,
if you are really concerned about the switching values of current and 
voltage that is being switched by your transceiver, I have a schematic that 
is simple to make up on a small perf board, and will drop the switched 
values down to just a few volts and very few milliamps.
Bob Perring
...........................................
Amateur Radio Station  N5RP
mailto:N5RP at pdq.net
N5RP Station Page: http://freeweb.pdq.net/perring/station.html


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