[Elecraft] Re: K3 as a SW receiver

[Mike Harris]

G'day,

Aren't there still some issues re VFO management when wide range tuning. 
The band switching can go pear shaped.

Regards,

Mike VP8NO

----- Original Message ----- 
From: "wayne burdick" <n6kr at elecraft.com>
To: "KM5Q" <km5q at mac.com>
Cc: <elecraft at mailman.qth.net>
Sent: Wednesday, December 31, 2008 6:16 AM
Subject: [Elecraft] Re: K3 as a SW receiver


| KM5Q wrote:
|
| > For AM SW listening be sure to get the "FM" filter (13 kHz). It gives
| > you the width you need for the audio bandwidth you expect. The normal
| > SSB filter (I have the 2.8) is too restricting for AM.
| >
| > However, I find that switching mode from AM to SSB reduces severe
| > fading and distortion, much like AM synchronous detection does (fills
| > in the missing carrier). It's a good technique, at least until synch
| > detection is implemented in the firmware.
|
| Windy,
|
| Also note that our 6-kHz 8-pole filter is targeted specifically at AM
| operation, and will provide better adjacent-channel QRM rejection than
| the FM filter, if needed. A 6-kHz filter is also required for AM
| transmit (enforced in firmware). This ensures excellent 2nd-I.F. image
| rejection.
|
| 73,
| Wayne
| N6KR