[Elecraft] PBT Macros

[Al Lorona]

> With passband tuning 
> (IF shift) and narrow and wider filters, I find myself 
> almost always using the narrower filter.

I caution you against equating PBT with IF shift; I did the same thing a few weeks ago and almost got my head chopped off by the resident gurus.

By the way, here are two trivial macros that I use to simulate --now, let me get this right-- *passband tuning*:

SHIFTDN   BW0200;IS 1000;  (or even narrower if you desire)

SHIFTUP   BW0190;IS 1550;

UNSHIFT   BW0240;IS 9999; (or whatever normalized passband you desire)

Though I know you're not a fan of doing this, Tom, I occasionally employ this technique to pull an exchange out when the contest QRM is at the moment coming predominantly from one side.

I can't listen to SSB in narrower than about 2.0 kHz for very long; I get listener's fatigue. I have been astounded by the folks who have 1.5 kHz filters installed for SSB. For me to understand a guy in a 1.5 kHz bandwidth he would have to slow down his speech to twenty words per minute and repeat each word five times.