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Messages - RobRich

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1381
Equipment / Re: equip question : new member: first post, i need help
« on: October 27, 2020, 2316 UTC »
It would seem he intends to run a Midland CB into a 35w amp. Correct?

4 watts probably will drive such a small amp into oscillation, particularly on AM, but I not sure many would notice anyway given the vacancy of the band outside of sporadic E openings for DX or the usual multiple-kilowatt superstations talking over each other. Even more so when compared to the typical overdriven and/or unfiltered splatter boxes on 11m; and far too often on amateur bands as well. o.0

Initial advice? If the transceiver and/or microphone have adjustable mic gains, please do not immediately crank the settings to their highest levels. I would rather try to copy a clean QRP signal than try to "interpret" to an overmodulated and heavily clipping strong signal.

Anyway, onto the the antenna aspect. A basic wire antenna can handle thousands of watts assuming correct wire gauge, tuning, common mode choking, etc.

That said take wattage ratings on loaded, matched, trapped, etc. 11m antennas with the proverbial grain of salt. Tubes can be expensive. Transistors can be expensive. Plan your antenna system accordingly.

I still have a Shakespeare 318GBT 18' vertical deployed at the QTH. I rarely use it for much of anything these days, but I picked it up years ago to replace an even older one from a previous QTH that finally failed after many years of outright neglect. Ground mount, add a few short radials, install a choke if desired, and retune the coil. Great vertical antenna for upper HF. This one has held up nicely over several years of abusive Florida weather thus far.

1382
Latin American Pirate / Re: unid 6906 usb 0500 utc 16 Oct 20
« on: October 15, 2020, 0852 UTC »
Quite possibly R.O.C.V. Check the Latin American forum for more details.

1383
2326z - Latin music.

Peaking S4 at times with fades via the 148' loop-on-ground. SINPO 25323.

Thanks for the broadcast! :)

1384
Equipment / Re: $50 tinySA Spectrum Analyzer + Signal Generator
« on: October 10, 2020, 0457 UTC »
Mine arrived last week, so apparently it is shipping in at least limited quantities.

I have yet to use it for anything, so no comment on usability, yet. Maybe over the weekend if I get around to some radio projects.

Agree with ya', K-Bear. I have a NanoVNA H4. Great little device, even if just checking and tuning antennas, less long all of its other possible uses.

1385
Equipment / Sangean ATS-909X2 Launch + Pre-Order
« on: October 10, 2020, 0454 UTC »
Specs and EU pre-order here:

https://www.sangeanshop.eu/en/ats-909x2

Not sure when it will launch statewide.

Quote
** 10 New Improved Features **

1. Air band
2. FM Soft mute
3. RDS PTY and RT
4. MENU and INFO setting
5. Auto Bandwidth Control
6. Bigger LCD
7. 3 times the preset quantity
8. Dimmer LCD back light and fade IN/OUT
9. 10Hz tuning step of SSB
10. Smart charger (single battery detection)

1386
Part 15 AM and FM Station Operation / iPhone = Part 15 AM Transmitter
« on: October 10, 2020, 0450 UTC »
Unintended radiator, anyway. Probably a lack of shielding for the audio amp or similar.

https://hackaday.com/2020/09/18/listening-to-an-iphone-with-am-radio/

1387
0430z - Big band music. Peaking S6. SINPO 45544.

Good copy. Strong modulation.

Grundig G3 and 148' loop-on-ground.

Thanks for the broadcast! :)

1388
I already have one collecting dust, but for anyone interested, I can attest to this model being a seemingly well-built lowpass filter. :) Just watch out for the sharp corners if like mine. :ouch:

1389
2400z - Faint music occasionally rising up to the edge of the local noise floor.

I am currently in eastern TN. Grundig G3 portable, MFJ tuner, and YouLoop in a window.

1390
Longwave Loggings / MMI Beacon 242KHz 2 October 2020
« on: October 02, 2020, 2357 UTC »
Airport beacon in eastern TN. I am currently located like six to eight miles away from the airport.

Using my Grundig G3 portable.

1391
Equipment / Re: YouLoop | NanoVNA Sweep | R+jX | 500KHz-30MHz
« on: September 22, 2020, 0701 UTC »
I get the idea of recommending a high dynamic range receiver for the YouLoop, but I wanted a different approach for using the antenna with my portables.

Getting to the point, the mismatch is horrid with my Grundig G3. The result is a need for ridiculous volume levels to discern signals. Yeah, not fun.

I was using a cheap eBay preamp with an antennuator to deal with the mismatch, but that also likely was putting a significant dent in the resulting SNR. Also it was something else to power while portable.

I could have tried to rolling a transformer to optimize the band(s) of interest, but that did not sound like fun, either. So taking the slacker route, I grabbed my currently unused MFJ-16010 for a try.

The 16010 is a simple L-network tuner for longwires. That said it actually works quite nicely with the YouLoop, especially since we are not transmitting and needing ideal matching. It is easy enough to simply swap the connections if needing to invert the match range, too.

Listening to 75m in a test tonight went from weak signals at high volume to much easier copies at moderate volume. Yes the absolute SNR is essentially the same, of course, but the little G3 portable has usable signal transfer now. Yay!


1392
Equipment / 20 USB Ports w/o External Hub
« on: September 20, 2020, 1845 UTC »

1393
Typo fixed. Poking at an iPad instead of an actual keyboard right now. ;D

1394
0013z - Old time music or similar. Not an easy copy, but it is listenable between fades and static crashes.

0028z - Signal improving to S8 peaks. Locally moderate to considerably strong static crashes, though.

0029z - ID something radio.... apologies, as I did not catch it.

0031z - SSTV.... anyone decode it? (Thanks Radio Star!)

Thanks for the broadcast! :)

1395
2332z - ID as SmoothLounge.com chillout radio
2332z - Chill and downtempo music
2338z - ID as Mix Radio International

Appears to be Mix Radio International relaying the SmoothLounge.com stream(s). MRI was on 12080 USB earlier. S9+30. SINPO 55555. Strong modulation. Easy copy.

Thanks for the broadcast! :)

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