[NLRS] [VHF] Tohtsu relay power ratings

[Mike King - KM0T]

>What website were you looking at Mike?

>The manufacturer rates them at 1000/800. That is the information I would use.

 

>73 de Tom, K6VCR

 

Tom, here is what I have…

 

Radiodan and Nebraska Surplus sales have them rated that way….

 

http://radiodan.com/ted_stuff/tohtsu.htm

 

http://www.surplussales.com/Relays/rfcoaxialrelays/rfcoax_n.html

 

It appears that the consensus from the answers is that these are not suitable for higher power…..

 

Does anyone of know if a good source of high power N – SPST relays.  I would like the style that looks like your standard SMA relay, but bigger and handles the power.  Research I have done says that the dowkey and Relcom versions of these have very good isolation and power handling characteristics…the problem is that I can find some of these like on RF parts, but they are 28V.  The voltage is not that big a deal, but I can’t seem to find a place where one could purchase these new if they wanted to…the dowkey website is not all that great….  The old SSBUSA site has the EME brand of relays, look great, but do not seem to be available anywhere that I can find…

 

73

 

Mike  - KM0T

 

 

On Tue, Jul 15, 2014 at 9:06 AM, Mike King - KM0T <scsueepe at mtcnet.net> wrote:

Anyone have any experience with the Tohtsu CZX-3500?  I purchased a few of these to share feed lines between a few bands...  (50 MHz / 222 MHz) (144/432)

The specs on the relays I purchased turned out not to be not the same as indicated on the
website that I got them from.

The data sheet for the relays I received say 1000 watts input power PEP for
50 and 150 MHz, as well as 800 watts PEP for 500 MHz.

The website indicated 2300 watts PEP on 50 MHz, 2000 watts PEP on 150 MHz
and 1000 watts cw at 500 MHz.  These are the specs I needed and based my
purchase on due to the power I will be running.

Anyone know if there are two different versions of this relay?  I have a few old CZX-3500s from a long time ago, these are labeled dc-6ghz and 250 ma at 12v.   Now these new ones just say 230 ma, no freq rating.

I am thinking of returning these, but the price was good.  Anyone know first hand if these handle 1.2 kW cw?

Thanks and 73

Mike - KM0T

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