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Re: [Amps] Input relay for QSK amp

Subject: Re: [Amps] Input relay for QSK amp
From: Jim <>
Date: Fri, 7 Dec 2018 09:02:09 -0600
List-post: <>
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.

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, 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.

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:
But maybe there's a better choice? I'm overwhelmed by the number and varieties of relays in the catalog.

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