[Top] [All Lists]

Re: [Amps] Input relay for QSK amp

Subject: Re: [Amps] Input relay for QSK amp
From: Larry Benko <>
Date: Tue, 4 Dec 2018 08:57:56 -0700
List-post: <>

I have made a lot of RF measurements on small relays at power levels up to 400w.  I have also measured operate and release times.

Larry, W0QE

On 12/4/2018 3:21 AM, 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.
Amps mailing list
<Prev in Thread] Current Thread [Next in Thread>