[Milsurplus] OT: Coaxial Relay ratings

[don davis]

Here is a useful graph of power vs frequency for typical relay classes (see
page 50).  It's not really clear in most datasheets but these are not rated
for hot switching.  I would avoid hot switching entirely to prevent early
demise.  Unless the mfgr rates it for hot opn.

73 de don ad6pb

http://www.teledynerelays.com/pdf/MW%20Switches.pdf 



-----Original Message-----
From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of
W2HX
Sent: Friday, October 17, 2014 11:43 AM
To: mstangelo at comcast.net
Cc: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] OT: Coaxial Relay ratings

Both side of the relay should be close to 50 ohms. The transmitter will be
50 ohms nominal and the antenna coupler should get pretty close. Yes, HF for
everything. One antenna tuner will be the harris RF-382A for 100-300W radios
and the other will be Sunair GCU-1935 (for KW operating).  The RF-382 should
be a quick project, but the GCU-1935 will take some time.  

73 Eugene W2HX