Messages

181

Amateur Radio / Re: Equipment Recommendations?

« on: January 10, 2022, 1944 UTC »

I'd head straight for a 7300, get it new on sale as the capitalists are trying to sell used ones for almost as much as new. Then all you need is a dipole, a psu, a pc, and off you go. So much capability and you miss out on the fun of bad caps, misalignment, stressed components, etc malaise of the typical used rig. I would say try a G90 but 20 watts isn't sufficient for newbs.

182

Propagation / Re: So you think you are are beginning to understand propagation?

« on: January 10, 2022, 1932 UTC »

You need ferrous materials to block rf best, a viking helmet would be a good start.

183

Equipment / Re: Xiegu bangs-out another one, the X6100.

« on: January 10, 2022, 1929 UTC »

It appears they fused what they learned from gsoc and the 90 into one lower powered unit.
They pinched off an fw update for the 90 after concentrating on the new rig, new fw makes mine crackle on sigs weak and strong so back to the 77b fw.
As noted in the story, the 6100 seems to respond with images to ambc and hfbc, not good! Sadly like its father the 90 in this respect.

184

Equipment / Re: EZNEC is now free

« on: January 10, 2022, 1921 UTC »

Indeed, great news.

185

Equipment / Re: Can a common mode choke really help reduce RFI?

« on: January 10, 2022, 1920 UTC »

I recall some tests qst or whoever made that showed chokes most effective at the rx port, but choke at each end of the line eliminated the line from participating in reception of signals and increased effect over just one end being choked. From then one I try to have chokes at each end. Also consider using different mix cores as that will give you wider range as far as freq goes, some cores are peaky.

186

Utility / Re: CIS Navy on HF

« on: January 10, 2022, 1901 UTC »

12464 1733Z 30AUG21
Lots of weak/unreadable cw for a time, then settles into a 4 second dash every 25 secs till los an hour or more later, think last time this dash every 25 secs took place they were testing a missile so mebbe another test launch.

Something similar is taking place right now 1858Z  12DEC2022

187

General Radio Discussion / Re: Deep Space Communications

« on: December 29, 2021, 0156 UTC »

An hf mode by Kantronics called GTOR used a Golay code like what vger uses.
Surely you recall vger?
https://memory-alpha.fandom.com/wiki/V%27ger#Evolution_of_V.27ger
https://www.digigrup.org/ccdd/g-tor.htm

188

General Radio Discussion / Re: If Not RTTY...?

« on: December 29, 2021, 0146 UTC »

USN HF FSK Network


NPN Barrigada Guam         8654 14887 15601 16015
Croughton UK                   7477 9074 10286 11464
AFA/NSS Davidsonville Md 4005 4985 6487 6497 9830 10712 12015 13590 15959
NKW Diego Garcia BIOT    4550 8093 8547 8550 22471 22910
NPG Dixon Ca                  4905 7597 8538 8694 9085 10320 10430 13870 16268
NAU Isabela PR                8676 7455 7711 10153 10895 11688 12120 16123
NPM Lualualei, HI             8676 9112 9960 14434 18558
NDT Totsuka Japan           5304 6358 10830 14375
NSY Sigonella Italy           5414 7420 9904 10974 18040 18411

Some channels have night/day ops qrg, example; Isabella 16123 day 10153 night.

================================================

4005    NSS Davidsonville, MD
4233    NPM Lualualei, HI
4726    NPG Dixon, CA
4906    NPG Dixon, CA
4985    NSS Davidsonville, MD
5120.5  NSY Sigonella Italy
5340    NAU Isabela, PR
5715    NAU Isabela, PR
6383    NSY Sigonella Italy
6487    NSS Davidsonville, MD
6732    NSY Sigonella Italy AJE Barford St.John UK
6831    NAU Isabela, PR
7455    NAU Isabela, PR
7545.5  NSY Sigonella Italy
7597    NPG Dixon, CA
7830    NAU Isabela, PR
8093    NKW Diego Garcia
8145    NSY Sigonella Italy AJE Barford St.John UK
8204.5  NSY Sigonella Italy
8547    NKW Diego Garcia
8676    NPM Lualualei, HI
8694    NPG Dixon, CA
9075    Wahiawa, HI
9112    NPM Lualualei, HI (occasional)
9830    NAU Isabela, PR
10153   NAU Isabela, PR
10827   NDT Totsuka Japan
10430   NPG Dixon, CA
10830   NDT Totsuka Japan
11177   NPM Lualualei, HI
11688   NAU Isabela, PR
11980.7 NAU Isabela, PR
12015   NSS Davidsonville, MD
12120   NAU Isabela, PR
13229   NAU Isabela, PR
13227   NAU Isabela, PR
13870   NPG Dixon, CA
14375   NDT Totsuka Japan
14434   NPM Lualualei, HI
15959   NSS Davidsonville, MD
16047   NPM Lualualei, HI (occasional)
16123   NAU Isabela, PR
16268.5 NPG Dixon, CA
18370   NPN Barrigada Guam  (occasional)
18558   NPM Lualualei, HI (occasional)
22471   NKW Diego Garcia
22910   NKW Diego Garcia

189

Utility / Re: CIS Navy on HF

« on: December 29, 2021, 0121 UTC »

8345 0100Z 29DEC21
VVV RCV RCV RCV de RJI48 and into wx and posrep
RJI48, voice call "BRILLIANT" hull SB-739, a Project 22870 Rescue Tug of Black Sea Fleet
RCV is Black Sea Fleet HQ

And some pics of the lovely lass;
https://www.kchf.ru/eng/ship/rescue/sb739.htm

in honor of suspected new soviet call sign....
https://www.youtube.com/watch?v=j2ER6VTaAyk
song seems to dis northern and black sea fleet duty


stronk soviet signala to all kamarad

190

Propagation / Re: So you think you are are beginning to understand propagation?

« on: December 27, 2021, 0701 UTC »

So much par up there it melted the shuttles kite string that one time.

https://rationalwiki.org/wiki/STS-75_incident

191

Equipment / Re: R-390a Users

« on: December 27, 2021, 0652 UTC »

I have one that has bad caps, resistors, and whatnot replaced, aligned to perfection by a perfectionist who is fairly expert in these rigs by now. It's the most sensitive rig here, hearing things others do not on the same antenna such as sucking a T600 (fsk) sig out of the noise clearly, when the other rigs don't hear it at all. It sits unused most of the time due to heat creation/power consumption, as well as other rigs being simply more effective (meaning ease of use for the most part) at whatever I want to copy at the time. As said they're stellar at ambc and hfbc - something I note is how good the stock detector for am is, I compared it to my RSP2 using synch and a few HAM rigs with ecssb, time and again the 390A pulls out more and better copy. At the time of its creation/service life there was little else that could do what it did, combining strong signal defense at the same time as having incredible ears, excellent for its time stability, and freq accuracy/repeatability. I use it with a variac and feed an old Hammarlund speaker with a 600 ohm xformer. One thing not often mentioned is the few birdies, very clean as far as spurs go. Not as spur free as the Winrad 313i wich you think should be filled with spurs since it's inside a freaking pc, but I digress. Might still work after Putin or whoever lobs some emps our way.

sherweng even tested one;
http://www.sherweng.com/table.html

https://www.dropbox.com/s/ddrji5c9a1q25ag/Sensitivity%20Figures%20on%20Some%20Receivers.pdf?dl=0

192

Huh? / Re: The mystery -550Hz carrier within 1240AM. I'm not the only one hearing this.

« on: December 22, 2021, 0539 UTC »

Can you guys get a bearing on it via a ambc portable? The online sdrs df might not be able to discriminate this one.

193

Amateur Radio / Re: Anytone AT_-778UV (Dual Bander)

« on: December 22, 2021, 0536 UTC »

Ok that's one fine lookin rig! Now I want one but will have to look into longevity reports to see if it is of the hizzy. A friend wants around the same deniro for a crusty old kw 733 rig

194

Amateur Radio / Re: Xiegu G90

« on: December 22, 2021, 0531 UTC »

For full power digital use the fan thingy is a good idea. The rig's designed to take heat and the pa is way underrated with respect to power out, but cool usually means longer life. The fan thingy also makes for a fine rig holder.


Been hearing from some that for fm use the best tx audio is produced when the mic gains set to 5 or so, stock is 10 wich is kinda hot.

195

General Radio Discussion / Re: An Introduction to DXing the MF Marine Bands? Sure...

« on: December 22, 2021, 0521 UTC »

Back when infotec m600s roamed the earth you could always find some poor ruskii trawler to copy hours of sitor messages from, even in the poorest propagation. Now it's just wx and notams to listen to.