Is there a reason to favor relays over taking a pin diode to ground to short the input during tx?
Art NK8X ᐧ On Sat, Aug 29, 2015 at 2:31 PM, Martin Kratoska <mar...@centrum.cz> wrote: > 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 >> >> > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > _________________ Topband Reflector Archives - http://www.contesting.com/_topband