It is unlikely this problem involves the Si4734 AGC. There is no threshold used in the AGC processing of the IF signal. The time constants are very fast and the only artifacts of AGC I've heard are

Very few, weak TP signals observed here this morning. Listening with the Tecsun PL-310 & 7.5-inch loopstick, at 1203-1322 UTC, I only heard weak carriers on 594, 648, 774, 828 & 972 kHz. The

I wrote the correct calls in my logbook...just hit a "K" instead of "J" when I posted. Yawn! :) Tim, KD8GZ

These observations taken together do seem to suggest that the chuffing (I, too, use the term "pumping") is audible AGC response, either triggered by seepage from other circuitry, such as the

Greetings to All, This past weekend Dianne and I traveled to Old Perlican, Newfoundland where we not only attended a family function Sunday, but also took to the dials in a mini Dxpedition with the

Hello All, It's great that Nigel noticed some exciting Asian signals this morning,which certainly was a better result than the west coast seemed toexperience. Thanks also to Nick for his comment

Ah, that chuffing! I call it pumping, but whatever you call it, my understanding is that signals that fade in and out below a certain SNR threshold (10 dB?) cause the AGC to pulse on and off. I

Im stabbing in the dark, Kevin, but I wonder why the backlight would cause this - of course, there will be some 5sec timing circuitry which could be the culprit. This, or other processing, could also

My recollection was it was indeed an AGC problem, but I'm certaily not an expert on the circuitry. IIRC there's a threshold level of the AGC that causes problems with weaker signals. Hopefully someone

Hi Michael/all: I think the chuffing refers to the chuffing sound of the "hash" created by the backlight of the display? On mine, it "chuffs" for about 5 seconds every time the backlight comes on

Hi Richard, I didn't listen during our sunrise this morning, but unlike yesterday I heard absolutely nothing in the 0800-1000 UTC period. 73, Jerry, KD0GS Longmont, CO

Interesting, interesting, Theo! I thought the D96L was considered one of the best. I dont have one, however. "Chuffing" - does that mean "fast or too fast AGC response"? This seems to be a problem

Shortly after I bought a Kchibo D96L last year, I was surprised to grab Cuba's R. Progresso/890 here in the Metro Vancouver area. The rx's chuffing finally got to me, and I offered up as an auction

On 21/11/2010 11:55 AM, edsemrad wrote: Ed........Nice Catch on 800 Khz!!!! I have not logged that one yet!!!!! CKLW usually messes that freq up for me .....but I'll look for it now that

Hi everybody, What I really like about this hobby is how unpredictable (at least for me) it is. I get the sunrise and sunset concept but each frequency seems to offer something different. Case in

There isn't much to report from this morning. I heard barely audible JJ talk on 594 and 693 kHz around sunrise (1313 UTC). The only other signals were hets on 774 and 828 kHz. After ending my

Hi Jerry, Great job on hearing JOUB-774 and JOIB-747 on your PL-310 (and PalomarEngineers loop) in Colorado this early morning. I was listening at the sametime, and conditions were far from ideal

Hello All, West coast DXers who were unimpressed by amediocre sunrise TP enhancement this morning may be interested to know thatthe early morning (0930-1100) Asian sunset session was equally

I'm also catching GX94 here in the Twin Cities, MN. Sounds like a local, it's booming in here tonight. First time hearing this one for me too. Jackie

On 20/11/2010 7:06 PM, Tim wrote: Tim......Nice Catch on CJGX....... GX94!! I hear them often Late at Night and into the Early Morning Hours...but I don't recall hearing them that early!!