How to examine the frequency of royal cubits?

To verify whether the so-called "royal cubit" (i.e., a ring or another element with a circumference length corresponding to the royal cubit) actually "resonates" at the declared frequency (most commonly, information about approximately 144 MHz is encountered), several measurement methods from the fields of radio engineering and electronics w.cz(high frequencies) can be used. Below, I present several methods and tips.

Using an antenna analyzer

1. Equipment:
   • It is best to have an antenna analyzer covering the VHF range (e.g., up to 200–300 MHz).
   • Popular models (such as mini-VNA, NanoVNA, RigExpert, etc.) allow for measuring the standing wave ratio (SWR) and the reflection parameter (S11) within a specified frequency range.
2. Connection:
   • If you have a wire ring with the length of a "royal cubit", you can try to make a "loop" out of it and connect it to the analyzer's output through a very short section of coaxial cable, ensuring proper connection (e.g., using a specially prepared holder or a coupling probe).
   • You can also use capacitive or inductive coupling – that is, do not connect the ring directly, but bring a coil or the analyzer's "measurement loop" close to it to register the frequency at which the transmission minimum (or the reflected signal maximum) occurs.
3. Measurements:
   • Scan the frequency range from, say, 50 MHz to 200 MHz and observe at which frequencies a clear "dip" (minimum) appears in the S11 characteristic (or the S21 maximum, if we have the capability for two-point measurement).
   • If there is indeed a clear resonant frequency around 144 MHz, it should be visible on the chart.
4. Interpretation of the result:
   • If the ring had a well-defined resonant frequency around 144 MHz, you would see a clear minimum.
   • However, it must be remembered that in practice, such a "bare" ring may have more than one resonance (this depends e.g.. on the shape, wire cross-section, contact quality, environmental conditions).

Method with a GDO (Grid Dip Oscillator) device

1. Equipment:
   • A classic GDO (currently less popular, but still found among amateur radio operators).
2. Principle of operation:
   • The device generates a signal w.cz.in a wide range and measures the "dip" of the grid current (in older tube constructions) or a similar effect in transistor versions – at the moment when the tested circuit enters into resonance with the generated signal.
3. Measurement procedure:
   • Place the ring (royal cubit) close to the GDO coil.
   • Tune the generator in the range of about 100–200 MHz and observe whether at some point the indicator (meter built into the GDO) shows a clear dip.
   • Then read the frequency (or the approximate value from the device's scale).
4. Advantages and limitations:
   • The method is simple, but it requires some practice, as the GDO requires a "good feel" of the probe's distance from the tested object to ensure the measurement is reliable.
   • The accuracy of the frequency reading depends on the quality and calibration of the GDO.

Use of a signal generator and a field strength probe

1. Equipment:
   • Generator w.cz. with the ability to set the frequency in the range, for example, 100–200 MHz and power adjustment.
   • A simple field strength probe (Field Strength Meter) or even a small receiving antenna connected to an SDR (Software Defined Radio) receiver.
2. Procedure:
   • You set the generator to the selected frequency and place the ring-cubit nearby (a few to several cm).
   • By changing the generator's frequency around 140–150 MHz, you observe the signal level in the probe.
   • When you hit the resonance frequency, the level of the signal registered by the probe (or a drop in the signal, depending on the circuit design) may change significantly.
3. Accuracy:
   • The method is more "workshop-based" and may require a few attempts, but it allows for detecting resonance near the expected band.

Factors to consider

1. Environment:
   • The resonance may vary depending on whether the ring is held in hand or placed on a desk, its distance from metal objects, etc.
   • The higher the frequency, the more significant these factors become.
2. Manufacturing precision:
   • The resonant frequency also depends on the wire's diameter or cross-section.
   • The quality of the end connections (if the ring is soldered) and the presence of an oxide layer on the surface also have an impact.
   • The actual resonance may slightly differ from the theoretical 144 MHz (e.g., 142 or 146 MHz).
3. Measurement vs. "energy theory":
   • If we talk about the royal cubit in an esoteric or radiesthetic context, the often cited values (e.g., 144 MHz) stem from theories related to sacred geometry or so-called "cosmic harmony."
   • In a strictly physical measurement, it may turn out that the resonance falls closer to 140 or 150 MHz.
   • The resonance may also be barely noticeable if the ring does not meet precise dimensions or is not treated as a classic resonant circuit.
4. Repeatability:
   • To obtain a repeatable result, it is best to conduct measurements under the same conditions (the same position of the ring, the same distance to the device, etc.).

Summary

The simplest and most transparent method is to use an antenna analyzer or VNA (Vector Network Analyzer), which will allow you to precisely see where the minimum or maximum of the resonance characteristic occurs.

• GDO (Grid Dip Oscillator): This is a traditional tool for amateur radio operators – quite simple to use, though less accurate than modern analyzers.
• Generator + probe: This method is also possible, though it requires more improvisation and is less "automatic."

Remember that in practice, achieving a perfectly "clean" resonance around exactly 144 MHz can be challenging. Differences of a few MHz are normal, depending on how precisely the ring is made and in what measurement environment it is located.

If you want to ensure that your royal cubit resonates at a specific frequency point, try to find someone (e.g., a ham radio operator, an electronics engineer w.cz.) with the appropriate measurement equipment. A short joint session with an analyzer will unambiguously determine the actual resonance frequency.