Re: LF: Antenna change over relay testing question

[Chris Wilson <dead.fets@gmail.com>]

19th April 2018

Hello Ricardo,

Thanks  for  the  link,  that's almost exactly what i am doing here. I
have experimeted and found a 5 watt, 12 volt automotive "festoon" bulb
as  used in many ineterior lights in older cars works well as a glitch
indicator.  The long spacing between filament posts means it can't arc
over  on  the voltages involved and the filament blows with no harm to
the  FET's.  So  far  no glitches have been revealed but I will test a
while longer I think ;)

Tuesday, April 17, 2018, 8:00:41 AM, you wrote:

> Hello Gris and for some time I use this system with my U3-S for the
> RXTX you want to see on my wsb pages

> http://www.qsl.net/ik1hgi/472khz/rele-tx-rx.htm ;
> Helo 73 ik1hgi Antonio






> 2018-04-17 2:50 GMT+02:00 Riccardo Zoli <riccardozoli80@gmail.com>:



> Hi Chris,


> Considering that you're handling a lot of power, all you need is a simple 
> relay sequencer.
> Take a look here:


> https://www.dropbox.com/s/xmwan9kuitu1l75/20180417_010251.jpg?dl=0



> A 150-200ms delay step seems adequate.
> Obviously, K1 is your Russian relay and K2 is your "safety relay".
> As Paul said, you can also add a pair of 1N4148 connected in anti-parallel on 
> RX input.


> All the best




> 73 de Riccardo IW4DXW









-- 
Best regards,
 Chris                            mailto:dead.fets@gmail.com