Pete KE9OA wrote:

Very true.............with those old receivers that didn't have one of the
new types of product detectors, you had to run the unit with AGC off and use
back the RF gain down to eliminate the distortion.


When did this commonplace knowledge disappear from the radio scene?
Pity...I guess thats why we have this forum.
-Bill

What I'm saying is there was something wrong in the BFO section. I KNOW to
back the RF gain down. Did you read my original post? Sorry if I wasn't
clear enough. Compared to my HQ 129x, a very similair radio, the SSB was
much trickier to tune in and CW signals were overloading much quicker.
Something was clearly wrong. Some people have e-mailed me off list with
ideas to increase the BFO injection slightly and everything is working fine
now. Thanks to all who helped.
Andy W1AWB

When did this commonplace knowledge disappear from the radio scene?
Pity...I guess thats why we have this forum.
-Bill

Andy Bullington wrote:

What I'm saying is there was something wrong in the BFO section. I KNOW to
back the RF gain down.

Ok, sorry, I got the impression from one post that turning the gain
down was supposedly a "fix".

-Bill

"When did this commonplace knowledge disappear from the radio scene?
Pity...I guess thats why we have this forum.
-Bill"

We all start out in radio knowing nothing. What we end up with is what we
learn from others, or figure out for ourselves.

I suppose I learned about different types of detectors and bfo injection
about 45 years ago - but I did not know it when I started. It still had to
be learned. And one thing I learned in graduate school was that usually the
person asking the most questions was the smartest.

Colin K7FM


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.783 / Virus Database: 529 - Release Date: 10/25/04

Bill M ) writes:
Pete KE9OA wrote:

Very true.............with those old receivers that didn't have one of the
new types of product detectors, you had to run the unit with AGC off and use
back the RF gain down to eliminate the distortion.


When did this commonplace knowledge disappear from the radio scene?
Pity...I guess thats why we have this forum.
-Bill

It disappeared when it became unneeded knowledge for most, ie when product
detectors came along and those using old receivers for SSB were in the
minority.

The best source of old knowledge is when something is new, because nobody
assumes everyone knows, and it's information people want. So the magazine
articles covered this really well when SSB first really hit in the late
forties, with complete and detailed articles, and then as SSB became more
common it was still out there but reduced to a paragraph or a sentence.
Since nothing has changed much, those early articles are still as useful
as back then.

WIth some things, say superregenerative receivers, it's like that game,
"broken telephone". By the time you get to the end, articles are not
repeating what was originally said, but what's been watered down in decades
of rather simple articles.

Of course, the original poster has said there was a problem beyond this
matter, and indeed there was something in the wording that made me think
it wasn't this issue.

Michael VE2BVW