[ARC5] TCS Transmitter Tip
Dennis Monticelli
dennis.monticelli at gmail.com
Fri Nov 25 13:15:10 EST 2016
Decreasing the lag time on break is very easy to accomplish. Simply
putting a zener in series with the diode will dramatically reduce the lag
by rapidly collapsing the magnetic field.
Dennis AE6C
On Fri, Nov 25, 2016 at 8:57 AM, Michael Hanz <aaf-radio-1 at aafradio.org>
wrote:
> It depends completely on the systems implications, Wayne. A straight
> diode will add a significant time (milliseconds) to the contact break time,
> depending on the strength of the magnetic field in the pole and the air gap
> between the pole piece and the moving armature. If it's just a push to
> talk function, it might be permissible. If it's a telegraph key follower,
> you may be in trouble from a speed standpoint. There is an annoying
> lag-on-break in that case.
>
> 73,
> Mike KC4TOS
>
> On 11/25/2016 10:24 AM, Robert Eleazer wrote:
>
> Isn't it modern practice to put a solid state diode across relay DC
> energizing coils? Given electron tubes' higher voltages and thus their
> resistance to spikes do we not need to worry about that?
>
>
>
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