On 31 Jul 2006 14:10:59 -0700, "Joe Analssandrini"
wrote:

Dear Bob,

If you DX on the MW at all you have surely experienced
selectable-sideband distortion (where the sideband[s] is/are received
"out-of-phase" with the carrier). Around sundown, all night, and up to
a bit after sunup, you will be receiving both skywave and groundwave on
many MW broadcasts, especially those from more than, say, fifty miles
away.

That is what a good sync detector circuit will improve. Do any of your
receivers feature this circuit? Have you ever tried it on MW in the
evening or at night? There is a BIG difference in the quality of the
received MW (AM below 1700 kHz) signal with the sync in use.

Best,

Joe

I just tried the sync circuit of my Sony 2010 on a weak 820 khz WBAP
in Dallas (I'm in San Antonio, 270 miles South). Much to my surprise,
the sync makes a difference. It doesn't always help, but it did here.

bob
k5qwg



Bob Miller wrote:
On 29 Jul 2006 15:56:18 -0700, "Joe Analssandrini"
wrote:


In addition, I think a newly designed "long-range" AM radio should
definitely feature a good synchronous detection circuit. I realize that
there are some few people who say they do not care for this circuit
(frankly, it is my belief that they do not know how to properly use it
or have not experienced a good one) but, even if that is the case, the
circuit can always be turned off.

A sync detector for ground wave AM below 1700 khz ??

bob
k5qwg