Topband: KD9SV-OK1RR relays ???

[Martin Kratoska]

Hi Douglas,

I am sorry to tell you that none of the relays you have is good for the 
front end saver. They are usual small signal relays but a reed relay 
should be used. The most important thing is not the capacitance (assumed 
that the front end saver is used on 160, 80 and possibly 40 m), but the 
switching times.

I would recommend to take part in a group buy. AFAIK David, G3WGN, 
organized a group buy/PCB fabrication of 80 units, possibly he may have 
rests for sale.

73,
Martin, OK1RR

Dne 29.8.2015 v 18:15 Douglas Ruz (CO8DM) napsal(a):
> Hi Martin, OK1RR,
>
> I tried email direct to you but it was not possible. I am sorry about
> the other member of the list.
>
> It is about the FRONT END SAVER relays:
>
> I have two different relays here and i would like to know if i can use
> one of them in
> your design:
>
> I have HFD2 Subminiature DIP relay:
> -Matching standard 16 pin socket.
> -DPDT
> -100 million operations
> - Operate time 4ms and release time 3ms.
> -Capacitance: Contact to coil 5pF and contact set to contact 1,5 pF
>
> I have also HFD41 relay:
> -SPDT relay
> -10 million operations
> -Operation time 10mS
> -Not sure about capacitance.
>
> Maybe i have to RE-DESIGN the PCB but that is very easy.
>
> Any idea???...Thanks,
>
> 73....Douglas, CO8DM
>
>
> _________________
> Topband Reflector Archives - http://www.contesting.com/_topband
>