RE: [RADIOSHACKDX394] Lets all post
- My first question is, is it a strong RF signal, or the LOUDness of the
Seriously, the audio output stage draws much more current than the entire
of the radio's total antenna-to-speaker signal chain. It wouldn't surprise
playing it Real Loud would suck the power rail down a bit.
Some time ago, I bought one of these radios that had the AC power cord too
damaged to safely use. So, I clipped it off, and tied it back nicely, and
a Radio Shack wall wart I had hanging around. The radio played ok, and I
never noticed if the dial light blinked, but I did notice on SSB and CW, the
the CW "note" was raggedy and buzzy, and the SSB was garbled too much
to comfortably listen to.
So, I put the radio on a 12-volt, 7 amp-hour gel cell battery I had.
sweet and pure. A battery like that will provide plenty of peak amps.
I use these radios now on my main station 12-volt buss, which is charged
by four 2-foot by 5-foot solar panels (with controller) The amp-hour rating
of the buss is somewhere around 500 amp-hours total. So, needless to say
my 12-volt rail is VERY "stiff," and there is no flicker... ...in
My entire station runs on this source. (Except for the Drake "B" twins, and
the Dentron Clipperton-L KW amplifier. That stuff runs on AC...)
One of these radios I set to 500 kHz, AM, with the audio gain about halfway
up, and I reduce the RF gain to zero -- the radio becomes silent -- then, I
advance the RF till I just barely hear some little bit of hiss. Just
And I leave it that way. Makes a FINE lightning detector. Hears the storms
about 200 miles away. No antenna. It's running on its internal loopstick.
Which is all you want.
Once, I tried this with two 394s. One was tuned to 500 kHz, and the other
set to 300 kHz. Somewhere in the Science it says lighting's RF emission
is strongest at 300 kHz. I didn't see any difference, so I just go with the
500 kHz, and it gives me plenty of notice of summer storms firing up in
the afternoon. The radio begins crackling quite a while before anything
shows on weather bureau radar on the internet.
Might be fun to run one on 500 kHz and another on 29.0 mHz. I know
from other systems, lighning is only heard on VHF when it's quite close.
Maybe five or ten miles or less. So, the lower frequency would announce
distant front lines of storms, or general atmosphere "cooking" and building
for afterneoon storms, and the 29.0 mHz would only crackle when it was
A pal of mine does something similar. He has an ultra-cheap AM pocket
radio -- remember the "Flavor-Radios?" -- rigged up with a wall wart and
no battery, and does the same thing. Tunes to 500, turns the volume
down till the thing is just barely audible, and leaves it that way forever.
This also works quite well.
[mailto:RADIOSHACKDX394@yahoogroups.com] On Behalf Of radiotech750
Sent: Tuesday, April 16, 2013 10:52
Subject: [RADIOSHACKDX394] Lets all post
Come on people lets share knowledge! I know there a lot of people out there
I have one about the display on my 394b. I have noticed that on a strong
signal the display seems to flicker some. Is this normal? Is it an advantage
to run the 394 off wall power or a power supply?
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