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Old 08-20-2012, 09:59 AM
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dR-Green dR-Green is offline
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Join Date: Apr 2008
Location: Wales, UK
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August 20 2012

Test to determine the resonance of the concatenated coils when they are free; no additional capacitance.

The new extra coil #2 is connected to the secondary for the first time. The condenser rings are removed but the ring on the top of the secondary left in place. The secondary probe is approx 25cm away on the same horizontal axis as the ring on the top of the secondary. The extra coil probe is approx 46cm above the extra coil.

Two resonant peaks are found.

F = 3670 kc

Peak #1 = 3023 kc
Ratio = 82.37%

Peak #2 = 4515 kc
Ratio = 123%





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August 22 2012

Tentative tuning relations for the "new extra coil #2" with a conductor length of λ/4*1.24 are now established. The extra coil frequency measurements with the given terminals are taken from the August 20 tests.







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September 5 2012

This test involves shorting the extra coil to measure the resulting frequency.

The measured output difference between secondary and extra coil pickups is in accordance with tandem mode measurements.

This data is taken from previous tests, the same setup is being used for this test.

Extra Coil Terminal = Terminal Block
F = 3670 kc
Tandem = 2180.7 kc
Secondary = 2370.8 kc
Extra Coil Direct = 3489.7 kc
Extra Coil 10pF = 3805.1 kc

Concatenated Mode output (pickup):
Secondary = 10mV
Extra Coil = 55.9mV

Tandem Mode output (pickup):
Secondary = 67.6mV
Extra Coil = 179.4mV

-----

Test 1:

Coil is tuned approximately as above, there is a slight deviation.

F = 3670 kc
Tandem = 2175 kc

The Extra Coil is shorted with approx 18cm length of wire. Only one resonant peak found.

Frequency = 2248 kc

Output (pickup):
Secondary = 66mV
Extra Coil = 163mV

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Test 2:

The same piece of wire is used this time as a vertical terminal capacitance.

Extra Coil Terminal = 18cm vertical wire
F = 3670 kc
Tandem = 2388 kc

Secondary frequency with extra coil disconnected, in place and free = 2917 kc
Secondary frequency with extra coil disconnected, in place and shorted = 2935 kc

Concatenated Mode output (pickup):
Secondary = 4.6mV
Extra Coil = 55mV

Tandem Mode output (pickup):
Secondary = 79mV
Extra Coil = 167mV

The wire used as terminal capacitance is used to short the extra coil.

Frequency = 2686 kc

Output (pickup):
Secondary = 79mV
Extra Coil = 187mV

-----

September 28 2012

Updated tuning data with Magnification Factor.

Pickup Distance:
Secondary = 22cm
Extra Coil = 28cm

Sec = Secondary
ECD = Extra Coil Direct
EC10pF = Extra Coil 10pF
C-EC-MF = Concatenated Mode Magnification Factor (Extra Coil Pickup)
T-EC-MF = Tandem Mode Magnification Factor (Extra Coil Pickup)











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September 28 2012

3670 kc Luminal Wavelength
81.687 Metres

3670 kc Luminal Quarter Wave
20.421 Metres

Empirical Extra Coil Velocity Factor (Direct Connection)
119%

Extra Coil Wire Length
24.308 Metres

-----

New extra coil #3:

Diameter = 8.28cm
Height = 8.28cm
93.25 Turns
Wire length = 24.256 Metres
Luminal frequency = 3089.819 kc
Free space frequency = 5777.961 kc

Measured Frequency:
Direct = 3676.7 kc
10pF = 3990.5 kc

Direct:luminal = 118.99%
10pF:luminal = 129.14%

Taking the ratio of the free space to actual measured velocity gives
1.5715 numeric (close to Pi/2)







Measurements:

2.5pF = 4030 kc
5pF = 3964 kc
10pF = 3887 kc
25pF = 3786 kc
50pF = 3737.5 kc

Spectrum Analysis:

Direct:



Harmonics:

332.2 kc
1602 kc
3676.7 kc (Fundamental)
5276 kc
7367 kc
8969 kc

10pF:



Harmonics:

3990.5 kc (Fundamental)
6019 kc
7992 kc

Notes:

The 10pF frequency in the frequency vs capacitance test is lower due to a longer input wire being used, as the different capacitors can't be suspended in mid-air, so the same length of input wire is used for all capacitance tests for relative consistency for the particular test.

Capacitors used for frequency vs capacitance test:

2.5pF = 4x series 10pF ceramic
5pF = 2x series 10pF ceramic
10pF = Ceramic
25pF = Vacuum (10kV)
50pF = Vacuum (15kV)

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October 2 2012

Extra Coils Review

Measurements are taken from the 10pF coupling tests.

Original Extra Coil:

Diameter = 8.28cm
Height = 8.28cm
Number Of Turns = 126
Conductor Length = 32.271 metres
Luminal Wavelength = 129.084 metres

Magnification Factor = 81.587

Free Space Propagation = 187%
Actual Propagation = 122%

Free Space Frequency = 4343.135 kc
Luminal Frequency = 2322.532 kc
Actual Frequency = 2833.1 kc

Self Capacitance = 3.8088pF
Effective Burdened Capacitance = 8.95pF
Effective Capacitance for sine quarter wave distribution:
By Steinmetz = 5.698pF
By Miller = 7.255pF

Self Inductance (Wheeler) = 892.297ÁH
Effective Inductance for cosine quarter wavelength current distribution:
By Steinmetz = 568.05ÁH
By Miller = 446.14ÁH

Characteristic Impedance:
By Steinmetz = 9984 Ohm
By Miller = 7841 Ohm

ω = 17576382.13 = 2797.368 kc

-----

New Extra Coil #2:

Based on λ/4*1.24

Diameter = 8.28cm
Height = 8.28cm
Number Of Turns = 97.25
Conductor Length = 25.323 metres
Luminal Wavelength = 101.292 metres

Magnification Factor = 60.397

Free Space Propagation = 187%
Actual Propagation = 129.4%

Free Space Frequency = 5534.611 kc
Luminal Frequency = 2959.685 kc
Actual Frequency = 3831 kc

Self Capacitance = 3.8088pF
Effective Burdened Capacitance = 7.949pF
Effective Capacitance for sine quarter wave distribution:
By Steinmetz = 5.06pF
By Miller = 6.44pF

Self Inductance (Wheeler) = 531.55ÁH
Effective Inductance for cosine quarter wavelength current distribution:
By Steinmetz = 338.39ÁH
By Miller = 265.77ÁH

Characteristic Impedance:
By Steinmetz = 8177 Ohm
By Miller = 6422 Ohm

ω = 24164446.87 = 3845.891 kc

-----

New Extra Coil #3:

Based on λ/4*1.19

Diameter = 8.28cm
Height = 8.28cm
Number Of Turns = 93.25
Conductor Length = 24.256 metres
Luminal Wavelength = 97.024 metres

Magnification Factor = 55.21

Free Space Propagation = 187%
Actual Propagation = 129.14%

Free Space Frequency = 5778.074 kc
Luminal Frequency = 3089.879 kc
Actual Frequency = 3990.5 kc

Self Capacitance = 3.8088pF
Effective Burdened Capacitance = 7.985pF
Effective Capacitance for sine quarter wave distribution:
By Steinmetz = 5.083pF
By Miller = 6.472pF

Self Inductance (Wheeler) = 488.72ÁH
Effective Inductance for cosine quarter wavelength current distribution:
By Steinmetz = 311.13ÁH
By Miller = 244.36ÁH

Characteristic Impedance:
By Steinmetz = 7823 Ohm
By Miller = 6144 Ohm

ω = 25144141.97 = 4001.814 kc

-----

October 3 2012

Secondary Coil Review

Free:

Diameter = 20.4cm
Height = 4.08cm
Number Of Turns = 20
Conductor Length = 13.079 metres
Luminal Wavelength = 52.316 metres

Magnification Factor = 63.7

Free Space Propagation = 102%
Actual Propagation = 72%

Free Space Frequency = 5845.024 kc
Luminal Frequency = 5730.416 kc
Actual Frequency = 4126 kc

Self Capacitance = 14.49pF
Effective Burdened Capacitance = 29.07pF
Effective Capacitance for sine quarter wave distribution:
By Steinmetz = 18.51pF
By Miller = 23.57pF

Self Inductance (Wheeler) = 125.94ÁH
Effective Inductance for cosine quarter wavelength current distribution:
By Steinmetz = 80.175ÁH
By Miller = 62.97ÁH

Characteristic Impedance:
By Steinmetz = 2081.089 Ohm
By Miller = 1634.484 Ohm

ω = 25956518.23 = 4131.108 kc

-----

Tuned:

Condenser rings capacitance measured at approx 11.8pF

Diameter = 20.4cm
Height = 4.08cm
Number Of Turns = 20
Conductor Length = 13.079 metres
Luminal Wavelength = 52.316 metres

Magnification Factor = 83.71159

Free Space Propagation = 102%
Actual Propagation = 64%

Free Space Frequency = 5845.024 kc
Luminal Frequency = 5730.416 kc
Actual Frequency = 3670 kc

Self Capacitance = 14.49pF
Effective Burdened Capacitance = 36.75pF
Effective Capacitance for sine quarter wave distribution:
By Steinmetz = 23.398pF
By Miller = 29.791pF

Self Inductance (Wheeler) = 125.94ÁH
Effective Inductance for cosine quarter wavelength current distribution:
By Steinmetz = 80.175ÁH
By Miller = 62.97ÁH

Characteristic Impedance:
By Steinmetz = 1851.09 Ohm
By Miller = 1453.84 Ohm

ω = 23087838.56 = 3674.543 kc

-----

October 17 2012

Test with New Extra Coil #3, Concatenated Resonance:

Extra coil has no terminal capacitance. Secondary is tuned via condenser plates for maximum (Concatenated) potential at 3670 kc. Output = approx 12mV.

Frequency sweep reveals that the actual peak is approx 3695 kc, output = approx 18mV.

Impossible to achieve this same output with any tuning of the condenser plates for the intended frequency of 3670 kc.
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Last edited by dR-Green; 10-20-2012 at 04:17 AM.
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