Internal mechanism is immaterial. Overall gain (whatever it may be) is constant for signals below the threshold, and decreases above it to prevent increase in audio volume. This is easily verified. B
Thanks! Well, one can say that, starting from the strongest possible signal downwards, the gain is increased (or attenuation decreased) to keep the volume constant, until the threshold is reached, an
If there has to be vertical wire, it would be much wiser NOT to ground it. RF power forced into soil produces no signal. So called "half-slopper" antenna is a dipole (as most antennas are) deformed s
Hi Rick, OK, let's see if you would agree with physics :-) It is a simple fact that pushing RF power into soil does not produce useful radiation, although some other goals may be achieved, like "perf
You can run one dipole leg vertical, and other horizontal, or zig-zag, or in any other fashion. Resonant frequency will change slightly, but that's easy to correct. Look at "Low-Band DXing from a Sma
Nice example of what I did recommend to Ken. Call it any name you like, I just see a good old trapped dipile, distorted to fit the space. Adding the second "radial" is also a good idea. Nice to see
Rick, not strictly a "Con", but three-tone close-in intermodulation audio/video recordings may be of interest, as they occur with levels as low as S9+20 dB: http://www.yt6a.com/download/ 73, Sinisa Y
Well, I find "energy" and "intelligibility" quite interrelated, i.e. one cannot have the later without the former. True :-) Should be so, although I wouldn't advance lower cutoff any further, unless
It gets worse with 3 signals. If the first filter is 15 kHz wide, then almost half of the 7 MHz CW band passes through, gets amplified by ~17 dB and reaches the second, mixer which is much weaker tha
When using Inrad 1.8 kHz SSB filter I have to move SHIFT approximately 1 division, otherwise audio response starts above 500 Hz. And the direction is not the same for USB and LSB :-( But with 2400 Hz
It depends on the transmitted signal. If nothing is transmitted below 500 Hz, then there is no point in receving below 500 Hz :-) Let's forget QRM, because it may come from all "directions". Let's al
I couldn't agree more, especially for SSB. On CW I prefer to switch filters and move RIT :-) Given that a filter has only two edges, using four controls is beyond reason. Probably a marketing trick,
It's simple: what is good for Inrad 1800 Hz filter, isn't good for stock 2400 Hz filter, and vice versa. If one is using both filters, it's easier to correct via SHIFT than via menu. It's not bad to
Not impossible, but very difficult. What is required is a current balun with very high common mode impedance, able to withstand very high common mode voltage, which can be many times the antenna feed
Hi, as I see it, Mr Cebik did build his reputation upon quality of his work, not the price of his tools. Every mortal is error-prone, including me, you and to some degree Mr Cebik. In particular, Mr
This is undoubtedly so. I did learn a lot from Mr Cebik's articles. However, even leading experts make errors or omissions occasionaly. That's natural and doesn't diminish their contribution at all.