Lee,
I bought a pack of 15 NPN-Type part number 276-1617 at Radio Shack in Largo,
FL a few months ago. Less than $5 and they work okay.
73,
Don VE3XD
> -----Original Message-----
> From: writelog-bounces@contesting.com
> [mailto:writelog-bounces@contesting.com]On Behalf Of Bryan Swadener
> Sent: Thursday, May 29, 2003 2:55 PM
> To: writelog@contesting.com
> Subject: Re: [WriteLog] CW Keying Interface
>
>
>
>
> Lee,
>
> Yes that will work though, you won't realize any isolation, since
> the grounds for the radio and computer would be tied together. I
> recommend using some kind of opto-isolator. The 4N33 is a
> darlington output device but I'm thinking you could use some other type.
> Unfortunately, "that national chain store" no longer handles any
> optocouplers. However, Digi-Key shows various versions
> available. They will ding you an extra $5 if your order totals
> less than $25 but, they have 'em... got anything else on your wishlist?
>
> If that's all you need/want, I have a dozen or so 4N33s in my
> parts box. I don't mind slipping one to you in the mail... my
> fee is a lot lower (one 807)! :^)
>
> Bryan, WA7PRC
>
> From: Lee Buller (k0wa@swbell.net)
> Subject: [WriteLog] CW Keying Interface
> OK, just need some comfirmation....
>
> I decided to build a keying interface for WriteLog, but I cannot
> find a 4N33 anywhere. Radio Shack does not carry them any more.
> Really! I even looked on the Web too.
>
> So, I reverted back to previous setup and a different program.
> Will this work? Use a 2N2222. From Serial Port Pin 4 to a 1K
> resistor to the base of the 2N2222. The emitter is hooked to Pin
> 5 and the collector and emitter are used to key the rig.
>
> That should work with WriteLog??? Right???
>
> Lee - K0WA
>
>
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