[Amps] Input relay for QSK amp

[Jim]

Those relays that Rich (and I ) used are mostly unavailable. I used to 
buy them 100s at a time. No more of them can be had.

Most of what you find on eBay are seconds and most don't work. Or they 
are re-labeled counterfeits.


Thanks
73
Jim W7RY

On 12/4/2018 4:03 PM, Alek Petkovic wrote:
> G'day Vic.
>
> The Matsushita/Panasonic relay that Rich Measures used in his QSK 
> circuit, published at somis.org, is still available on Ebay. I bought 
> 10 of them a couple of years ago
>
> Otherwise, Jim, W7RY, uses a small relay in his QSK kit. He laso deals 
> on Ebay.
>
> 73, Alek.
> VK6APK
>
> On 4/12/2018 6:21 PM, Victor Rosenthal 4X6GP wrote:
>> I'm trying to choose a relay to use as the input relay in a QSK amp.
>> I have been very satisfied with the Jennings RJ1-A as an output 
>> relay. The input relay in this circuit needs to be DPDT, or I'd just 
>> use two similar vacuum relays.
>>
>> Here are my needs:
>>
>> 1. DPDT.
>> 2. 12 or 24v coil.
>> 3. Operate/release time, including bounce <= 4 ms. Faster is better.
>> 4. Should carry 100w RF in 50 ohm system. Not expected to make/break 
>> live circuit.
>> 5. Must have low resistance for low-level signals (receive path).
>> 6. Must have long life >= (10 x 10**6 operations)
>> 7. Must not be insanely expensive, and available from Mouser or RS.
>>
>> I found this relay:
>> <https://www.mouser.co.il/datasheet/2/418/NG_SS_108-98005_L-1019204.pdf>
>> But maybe there's a better choice? I'm overwhelmed by the number and 
>> varieties of relays in the catalog.
>