Slightly off-topic, but does anybody know how to turn the button beeps off? It's about to drive me insane! Scott Hobbs, New Mexico Grundig/Eton G8, Sony SRF-59, 2002 Ford Focus (All Barefoot)

Speaking of NDBs, does anybody know the call sign for the NDB in Sallisaw, Oklahoma, at 520 kHz? I logged that one a while back, but I don't know its call sign. Thanks!

It sounds like you've activated the Sleep function. Do you have a little bed symbol in the top left of the display? Press the Power/Sleep button and within 3 seconds, turn the tuning knob to select

Youmay have changed the "Sleep Setting". Most radios with a Sleep functionallow you to adjust the time from 90 minutes to 5 minutes. Keith

My Grundig has started powering off every 5 minutes. I changed the batteries to no avail. Is this a setting I may have accidently set. I'm also going to acquire an AC adapter to see if that

Radio Used..............................barefoot Sony SRF-59 Total ULR Loggings (Kirkland Lake)......162 1600 WWRL New York City NY. Infomercial for Omega 3 Super Pill. Announcement about the views

940 CJGX Yorkton, Saskatchewan, 11Jan2010 0805 EST, 50k 10k country east of Saskatoon, 1101 mi from Detroit, ulr SRF-M40W barefoot Byron wa8lcz nr Detroit Mi

Hello All, Occasionally in January some excellent TP propagation occurs in theearly morning on the west coast, and today was apparently one of thosedays. Despite the inconvenient local hour (0100),

I believe what you heard was NDB LYQ in Morristown TN, at 529.

Oops. I saw that you had the wires in series, but got myself confused about the magnet experiment. In that case, I don't understand how the experiment works. Regarding the "50 V" reasoning,

Hi Scott The experiment definitely emphasised that the bifilar configuration was in series thus having the same resistance as the normal coil. I also wound my coil this way. You can see this in the

Roy, I think the electromagnet with paperclips experiment is deceptive. In that experiment, only the dc resistance of the coil matters, not the RF properties. Two parallel wires of the same length

Thank you all for your comments and added detailed explanations. I forgot to mention one of my attempts. This entailed winding the loopstick coil in a bifilar configuration. A while ago when I was

This is the CORRECTED post with CORRECT approximations: 1) Center the windings: keep them as far away from the ends as possible. 2) Space the turns 1 to 1 meaning the space between turns is the same

OOOPS: I found a mistake in what I wrote here... at a 4 to 1 rod length to diameter, the factor is 12, NOT 16 as I previously wrote... therefore the factor at 12 to 1 is 43.2, NOT the 47.2 I wrote.

Yes, Ben's work is essential for these. Dan McGillis also did some good leg work on this testing various lots of #61 mix and coming up with suitable values of factor and K. I would also recommend a

Nice explanation, Paul. According to the Silicon Labs datasheet, the inductance should be between 180 and 450 uH (Si4730/31-C40, page 21). The current batch of chips may tune a 554-uH (or even perhaps

I am posting responses to this msg based upon experiences and knowledge gained. In some cases there are no hard-and-fast rules, but significant differences are observed. 4" x 3/8" is a 10.7 length to

Roy, Excellent! Many thanks. Then we can confidently work within the datasheet parameters for inductance. Your results compare well with Ben Tongue's research into ferrite-bar antennas, here:

I am in Kirkland Lake Ontario for a few days, so I have some time to increase my totals from that location. Radio Used.......................................barefoot Sony SRF-59 Total ULR Loggings