Topband: TX relays

[Mike Waters]

The contacts are not gold-flashed, that's just the lighting and reflections
that makes it look that way in the photos. They are a cadmium-free silver
alloy. Here's the data sheet.
http://www.mouser.com/ds/2/307/en-g2r-15525.pdf

But, this discussion does not answer Milt's original question, because he
wants a DPDT relay. :-)
He said "I am looking for some 12 VDC units that are capable of handling
full legal limit power to install in a controller for a multi-element
directive array." Maybe we can get back on track here.

I have a half-dozen sealed 12VDC DPDT relays that I am going to use (among
other things) to switch the low-Z sections of my remote tuner/band switch.
They're rated at 8A and have 5 kV insulation (and maybe that's
conservative) between coil and contacts. I'm pretty confident they will
handle the legal limit even with a little mismatch. (And these are not for
any receiving application here.)

The Mouser P/N is 655-RTE24012.
Contacts are 90% silver and 10% nickel.
Data sheet: http://www.mouser.com/ds/2/418/RT2pb0411-205066.pdf

I would have to cut one of them open to take a photo of the guts, and I'd
rather not do that right now.

Mouser has about 5,000 of them in stock, and they are only about three
bucks each.

73, Mike
www.w0btu.com

On Thu, Oct 9, 2014 at 9:54 PM, Tom W8JI <w8ji at w8ji.com> wrote:

>
>>  Between contact and coil. I just took 2 photos:
>>> http://www.w0btu.com/files/misc/Omron_relay_G2R-1-E-T130/
>>>
>>
>
> This is where dissection helps. We can see, from the pictures, that relay
> is likely a good relay.
>
> 1.) It has wide smooth current paths. It does not have wire leads
>
> 2.) It has good spacing and insulation from contacts to the coil and metal
> outside the contacts
>
> 3.) It appears to be, although I am not certain, a gold flash.
>
> Gold (real gold flash) is ideal for the receiving end as long as it is not
> hot switched or arced. Silver is not. Some silver alloys are worse still,
> and materials that appear in relays designed to be hot switched at high
> current are terrible in our applications (unless we only transmit).
>