Elecraft

Buzzers

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Jeremiah McCarthy

Buzzers

A buzzer can be made up from a non-latching relay by wiring it's own coil in series with it's own NC contacts...

Jerry, wa2dkg
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Stephen W. Kercel

K2 connectors

A couple of points from the K2 manual are unclear to me.

The Documentation mentions that if you use an external keyer, you
still need to use a stereo plug, with the keyed line going to the tip
of the plug and the center ring going unused. I was wondering if a
coupling the keyer line to the K2 key jack via a mono-to-stereo
adapter like the Radio Shack 274-0374 (which presumably shorts the
tip and center ring) will work. Also, what size of stereo plug is required?

Also, for the front panel audio headphone output, what kind and size
of plug is required? I'm using a Sennheiser PX 100 stereo headset. If
I just plug it directly into the K2 front panel phone jack will it work?

73,

Steve
AA4AK

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Joe-aa4nn

Re: K2 connectors

Both stereo plugs are 3.5mm. If it were me I would make
a keying lead from my keyer to the 3.5 plug rather than use
a Shadiorack adapter... You don't want too much weight
and tension hanging off the back of the K2's keyer jack.
If your Sennheiser has 3.5mm plug, plug it in.
de Joe, aa4nn

----- Original Message -----
From: "Stephen W. Kercel" <[hidden email]>
To: <[hidden email]>
Sent: Thursday, February 09, 2006 11:18 AM
Subject: [Elecraft] K2 connectors

>A couple of points from the K2 manual are unclear to me.
>
> The Documentation mentions that if you use an external keyer, you still
> need to use a stereo plug, with the keyed line going to the tip of the
> plug and the center ring going unused. I was wondering if a coupling the
> keyer line to the K2 key jack via a mono-to-stereo adapter like the Radio
> Shack 274-0374 (which presumably shorts the tip and center ring) will
> work. Also, what size of stereo plug is required?
>
> Also, for the front panel audio headphone output, what kind and size of
> plug is required? I'm using a Sennheiser PX 100 stereo headset. If I just
> plug it directly into the K2 front panel phone jack will it work?
>
> 73,
>
> Steve
> AA4AK
>

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Alexandra Carter

Re: Buzzers

In reply to this post by Jeremiah McCarthy

They sure don't last long that way though!! Don't torture relays, just
get a piezo buzzer out of something and use that lol. 73 de Alex NS6Y.

On Feb 9, 2006, at 8:52 AM, Jeremiah McCarthy wrote:

> A buzzer can be made up from a non-latching relay by wiring it's own
> coil in series with it's own NC contacts...
>
> Jerry, wa2dkg
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
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> Elecraft web page: http://www.elecraft.com
>

Alexandra Carter

Re: Buzzers

In reply to this post by Jeremiah McCarthy

And.......... people wonder why no one emails 'em! You need to take
your email out of lid mode if you want help, Alex.

On Feb 9, 2006, at 3:06 PM, [hidden email] wrote:

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Ron D'Eau Claire-2

RE: Buzzers

In reply to this post by Alexandra Carter

Alex NS6Y wrote:

They sure don't last long that way though!! Don't torture relays, just
get a piezo buzzer out of something and use that lol. 73 de Alex NS6Y.

Do piezo buzzers make that noise? I've never disassembled one so I'm not
sure if they have those nice sparking contacts.

Another approach, since the original requestor was looking for a solid state
answer, is to get my greatest QRN nemesis - a cheap lamp dimmer. The
wideband racket they make is a perfect test for the noise blanker, and if
it's working correctly it'll take that noise right down into the band noise
(thankfully!)
Ron AC7AC

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