Topband: TX relays

[Tim Shoppa]

Mike, I would be concerned about using these small relays for non-resonant
antenna switching where the impedance at the switch point may be wildly
away from 50 ohms.

This is the relay I use to switch tuning networks at non-50-ohm points:

http://www.deltrol-controls.com/products/relays/power-relays/900

Deltrol is the brand you get if you order from McMaster-Carr but all the
big relay manufacturers sell these open frame relays.

I also bend the relay contacts for wider spacing as recommended by N6RK in
QST (page 66, May 2009 QST Hints and Kinks, "Increasing Relay Voltage
Handling"). Open contact gap of 0.5 inches is readily achievable.

Tim N3QE


On Thu, Oct 9, 2014 at 6:19 AM, Mike Waters <mikewate at gmail.com> wrote:

> This relay looks exactly what I was looking for to remote-switch my 160m
> inverted-L to other bands, because it will withstand a lot of voltage. From
> the PDF:
>
> High insulation
> Insulation distance (between coil and contacts): 10mm min.
> Dielectric strength: 5KV
> Surge strength: 10KV
>
> 73, Mike
> www.w0btu.com
>
> On Thu, Oct 9, 2014 at 2:23 AM, Thomas PA1M <t.b.tinge at gmail.com> wrote:
>
> >  Fujitsu FTR-K1CK012W
> >
> _________________
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