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Messages - R4002

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631
Shortwave Broadcast / Re: WBCQ Superstation 9330 AM 18 Jun 2019
« on: June 21, 2019, 1858 UTC »
At 1545UTC, I have a weak carrier on 9330, with what sounds like a tone of maybe 5kHz (or could simply be some RF whine getting pulled up by the audio processors). Wonder if it's just the transmitter's exciter output with the plates shut off? One AM station I worked at with a 10kW Gates transmitter still leaked around 20 Watts at the common point on filaments only with the plates switched off. This is strikingly reminiscent of that.

Thankfully, I missed Brother "Stare" broadcasting. :D "Bro" is just not my cup 'o tea! I had enough of him when I had to board op his program for a while in the 90's. But it's funny you mentioned the signal was weaker when he was on. That is probably because his audio is so narrow. I'd swear he uses a piezo tweeter for a microphone!

That would make sense.  The music that was played after the Overcomer "Ministry" (Brother Scare) had better dynamic range and was quite pleasant to listen to (save for the distortion-y peaks). 

632
10/11 meters / Re: 11 meters is active 1445 UTC 12 June 2019
« on: June 21, 2019, 1854 UTC »
Excellent.  Is 26.915 MHz (or nearby) active too? 

633
10/11 meters / Re: 11 meters is active 1445 UTC 12 June 2019
« on: June 21, 2019, 1428 UTC »
What other low channels (below 26.965 MHz) were active other than 26585 AM / 26.585 MHz? 26705 AM / 26.705 MHz (and nearby frequencies 26.685 MHz, 26.695 MHz, 26.715 MHz, etc.) are often busy when 26.585 and others are active.  26.595 MHz is apparently the "secret" channel for Mexican truckers.  26.605 MHz is the alternate.

Since 26.585 is channel 7 "down one band", most export radios jump from 26.585 to 26.605 MHz (channel 8 down one band), the only way to get to 26.595 MHz is to use the +10 kHz switch (to get to channel 7A).  I've talked to 11m guys in France and other parts of Europe who have heard Mexican Spanish voices on 26.585 MHz AM and 26.595 MHz AM when propagation to Europe is good...which is pretty crazy when you think about it.  26.565 MHz to 26.955 MHz are authorized CB frequencies in several European countries (in FM mode only, however, as channels 41-80 in straight 10 kHz channel sequence, no skips).  I know that's the case in Germany, the Czech Republic and Hungary - and probably other countries. 

Channels 1 - 40 are the same as the American CB band plan (CEPT/European standard band plan), then,
26.565 MHz - Channel 41
26.575 MHz - Channel 42
...
26.945 MHz - Channel 79
26.955 MHz - Channel 80


As an aside - I know I go off topic - I use both kHz and MHz notation on the 11m board because most folks searching these frequencies in their favorite search engine are more likely to use MHz notation, but its unofficial HFU policy to use kHz notation.

634
popping coke pills

I'm morbidly curious about how often amphetamines are officially sanctioned for g-man business, be it military pilots, specops or otherwise.


Sir Shackleton used Forced March brand (no literally, that was the brand name - see https://eshackleton.com/2014/03/16/forced-march-tablets/) cocaine/caffeine tablets on his Antarctic mission.  It has often been said that "Methedrine won the battle of Britain".  Methedrine, being, of course, the old trade name for methamphetamine tablets (they're now sold under the brand name Desoxyn, cf.  Benzedrine now being called Adderall - good old Dexedrine, however, is still called Dexedrine). 

Go-pills have been used for military operations for as long as amps have been around.  The Germans in WWII used them extensively, especially on the Eastern Front (see: brand name Pervitin, Hitler himself was a big fan).  They were in the process of developing a "super-pill" containing methamphetamine, cocaine and oxycodone at the end of the war (see: https://en.wikipedia.org/wiki/D-IX) .  Reports indicate that the Japanese also heavily used methamphetamine in military operations, and factory workers were often "encouraged" (forced) to take amphetamines to improve productivity, both during and after World War II. 

https://allthatsinteresting.com/pervitin-nazi-drugs

There's a move within many military forces away from amphetamine and towards the "wakefulness promoting agent" modafinil (aka Provigil) because of the negative effects of long-term amphetamine usage. 

635
Shortwave Broadcast / Re: WBCQ Superstation 9330 AM 18 Jun 2019
« on: June 21, 2019, 1126 UTC »
I was listening to them last on Chris' KiwiSDR last night (all my local radios were disconnected due to storms) around 2045 - 2100 UTC and noticed that when Brother Scare was on 9330, the signal was only in the S9 to S9+10db range....then he went off and they went back to music, and the signal jumped up to S9+40db on the peaks.  Just a massive red blob on the Kiwi waterfall, easily the strongest station on the band, stronger than local AM BC stations.  Not overloading the receiver, but seemed like it was about to be.  I noticed distortion on music peaks, but that may have been on WBCQ's end vs. the receiver's end. 

636
If shtf I can see local am stations becoming much more valuable.

AM in general, but yes.  A good example would be the immediate aftermath of Hurricane Katrina - local New Orleans AM stations (the ones that remained on the air anyway) were the only source of information for many people as everything else had been knocked out. 

637
10/11 meters / Re: 11 meters is active 1445 UTC 12 June 2019
« on: June 21, 2019, 1119 UTC »
I haven't heard the 26.585 MHz crowd like that in a while (complete with the noise toys, music, sound effects, echo chambers, etc.).  When 26.585 MHz AM is busy, check 26.555 LSB (and nearby frequencies).  I believe some of the guys on 26.585 and 26.595 are in the same area as the crowd that hangs out on 26.555 LSB. 

638
Probably depends on how you define "modest" - are we talking less than 1 watt QRP or 4 watt carrier CB power levels or QRPP/Part 15 power levels?   If those emergency CB radios mentioned by Kage used RCA jacks then probably.  I remember I used to have a late 70s vintage Radio Shack (Realistic) handheld CB with a massive center telescopic whip antenna and it had connectors on the side for external microphone, speaker, 12VDC power and antenna...and the external antenna connection was a RCA connector.  The handheld CB was wither 2 watts or 4 watts transmit power rated, that's with a fresh set of batteries or an external 12 volt power supply though. 

Did I ever actually connect an external antenna to the handheld CB?  Nope.  But as mentioned by Kage, there were other radios sold with these connectors so they must work to some degree or another.  I imagine that the emergency CBs aren't designed for absolute maximum range but the antennas still need to present a workable impedance and SWR to the transmitter.

639

Found a Russian digital station on 6215 a few months ago. Signal type identified by ulx2.
It was on 23 April, search for 6215 and utility on this forum.

I don't doubt that.  I'm just agreeing with the original poster that using safety of life/distress/emergency frequencies is a bad idea.  Transmissions on those frequencies will be noticed by folks who don't want interference on those frequencies.  Why risk transmitting on an emergency frequency when there are lots of other frequencies available? 

640
There's technically an ITU numbered HF SSB marine channel plan (believe it or not).  Most marine SSB radios come with these frequencies pre-programmed in them.  Fishing fleets will often use whatever frequency they want, including .5 offset frequencies and out of band frequencies. 

The data signals and Russian military signals on the marine frequencies are fine, but I don't think they're transmitting on international distress frequencies either. ;) 

641
640 kHz and 1240 kHz on your AM dial

642
CB is legal provided you stay within the required frequencies, power limits and use type-accepted equipment.  WPAS appears to use CB equipment and a lot of CB operations (at least here in the USA) are done with non type-accepted equipment...making the CB service a mixture of legal and illegal transmissions, hence enforcement is difficult (in the USA).  My understanding with WPAS in Ireland (and the CADS service in the UK, which is functionally the same, and uses 26.965-27.405 MHz and 27.60125-27.99125 MHz (CEPT 40 mid band CB channels and UK FM 40 27/81 CB channels) the transmitter power limits are similar to CB, but, like CB, are rarely actually enforced. 

WPAS actually has two sets of overlapping channels (27.60125 MHz to 27.99125 MHz in 10 kHz steps, and 27.605 MHz to 27.995 MHz in 10 kHz steps - this seems to match with the use of "export" or modified CB equipment and/or equipment designed for the UK FM CB channels).  From other monitors and logs, Irish churches also use the regular 26.965 MHz to 27.405 MHz "mid band" 40 CB channels for WPAS purposes and ComReg doesn't seem to care.  Much like the USA, the 26-28 MHz band is given a very hands-off approach by regulators as long as nobody is causing interference to anything important.  Here in the USA, enforcement is complaint-driven and the FCC won't really do anything unless somebody asks them to. 

The use of frequencies on what's considered a safety of life band (6 MHz marine band and 12 MHz marine band) means that if a maritime radio user reported interference on 6295 kHz or 12255 kHz, Reflections Europe would probably get a visit from ComReg. 

643
"I'm having trouble finding info on this."

AKA   2.5mm

Even modern AM/FM/SW portables have 3.5mm audio jacks as their antenna connection.  I know my Grundig G3 uses a 3.5mm jack for the roll-up wire antenna connection, and I believe my Tecsun PL-660 does as well. 

For RX purposes I would feel better using a RCA plug over a 3.5mm plug, but for portables it makes sense to use a smaller size plug for form factor.  Plus, as others have mentioned, there's a huge amount of variability when it comes to the quality of the connectors/sockets themselves. 

644
Other / Re: 6903 USB
« on: June 20, 2019, 1215 UTC »
It appears that an exercise is underway, per the thread on 11175 USB in the Utility forum, several other frequencies have/had EAM-like traffic on them, probably in addition to 6903 kHz USB.

645
Indeed.  I would note 6215 kHz as pirates seem to like 6210 kHz and 6220 kHz.  Since the voice distress frequency is 6215 kHz USB, putting an AM signal on 6220 kHz will cause interference with USB voice comms on 6215 kHz.  An AM signal on 6210 kHz (presuming 10 kHz bandwidth) is probably below the bottom edge of 6215 USB, but just barely (an AM signal centered on 6210 kHz with 10 kHz bandwidth would cover 6205 kHz to 6215 kHz, but since 6215 kHz USB is on the upper side of that, it might be okay). 

Still, I would avoid using 6210 kHz just to play it safe.  I know that 6212 kHz is a popular marine HF-SSB frequency - the 6 MHz marine band starts at 6200 kHz and goes up to 6525 kHz, with SSB voice channels every 3 kHz so 6203 kHz, 6206 kHz, 6209 kHz, 6212 kHz, 6215 kHz, 6218 kHz, 6221 kHz, etc...so parking a big AM signal on 6210 kHz will cause QRM to anybody on 6209 kHz or 6212 kHz. 

Avoid 6210-6220 kHz, 6310-6320 kHz, 6265-6275 kHz.  The most important ones are the SSB voice distress frequency of 6215 kHz and the DSC distress frequency of 6312 kHz. 

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