[Elecraft] (spectrogram) K2 crystal filter question

[Bill Coleman]

On Mar 19, 2010, at 9:04 AM, lstavenhagen wrote:

> However, now with the discovery of cocoamodem, I've got a real hankering to
> try PSK31. I can already receive it pretty well just using the internal
> microphone in my mac (I have 2, my macbook pro and an older macbook). I just
> set the rig next to it and turn the volume up a bit and viola I can hop
> around in the waterfall in the PSK window and "read the mail" on all the PSK
> sigs. It even works on RTTY fairly well in the Wideband RTTY window.
> So I may end up revisiting the spectrum analyzer method if I do any
> alignment of filters for digital modes.

All of these computer "soundcard" programs work tons better if you buy or build an audio adapter. Mine used a couple of transformers out of the junkbox, a few resistors and trim pots. I even put in an audio jack so I can listen with headphones (at reduced volume).

> I may have to put off enabling transmit for a little bit, tho, as I'm
> planning on getting a K3 at some point. If I decide against that I'll just
> put the KSB2 module in my K2, but I'm trying to, er, make the financial
> numbers work on a K3 first hi hi.

I know what you mean. I love my K2, and I'd love to get a K3.

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901