I must be old school. The input relays need to be slower than the output
relay.
Seems to me that a RJ-1 takes 8ms to close and stop bouncing around. I have
always
used a P&B miniature open frame DPDT for that purpose. The output of the
amp needs
to be closed before the input turns on.
Bob
On Fri, Dec 7, 2018 at 9:39 PM Jim <jimw7ry@gmail.com> wrote:
> 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.
> >
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