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Cibola Bench Test
Posted by: POLEWAGGER
Date: February 18, 2012 01:48PM
Took the C downstairs for a going over with my audio test gear.
These tests are on my Cibola. Your test results may vary.
Gear used: Goldstar AO-3001C Audio Frequency Counter/Function Generator.
Fluke 8020B DVM
I was going to focus my testing on waveform analysis but my old Leader CRT scope doesn't show enough speed or resolution to show what's going on inside the sine wave that the coil emits. I only used inductive coupling to take measurements. Using the inductive pickup on both the 9X8 & 5.75 rendered a maximum 1.3VAC@14.1kHz.* The same test on the Famous Trails 1023 only gave a .2VAC@6.5kHz reading!
*Voltage reading dropped slightly, switched from center, to RH, to LH position. Center frequency provides highest inductive voltage delivered from coil.

Here are some of the coil frequency results from my test.
C&V advertised freq. 14.3kHz 14.5kHz 14.7kHz
Switch Position ? ? ?

Actual freq. measured 9X8 13.7kHz 13.9kHz 14.1kHz
" " 5.75 13.8kHz 14.0kHz 14.2kHz
Switch Position R L C

Sorry this is tough to read, the post didn't maintain my spacing...grrr

Advertised audio frequency 630Hz
I found the tones to be far more complex than a single frequency, more like a harmonica. I tried my best to identify the dominant tones and the ranges.

Audio Tones/Pitches: Disc* AM1* AM2* Batt Test Thresh Cont Lowest Tone Thresh Cont Full CW
Low Range 280Hz 240Hz 365Hz 390Hz 240Hz 365Hz
High Range 590Hz 480Hz 730Hz
* Disc tones are combined as one, while AM High-Low tones will "sweep". Consider AM1&2 each as one combined, sweepable tone.

NEXT: A look into the audio waveforms.



Edited 1 time(s). Last edit at 02/18/2012 01:51PM by POLEWAGGER.

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Re: Cibola Bench Test
Posted by: POLEWAGGER
Date: February 19, 2012 12:34PM
Here are some of the coil frequency results from my test.
C&V advertised freq. 14.3kHz 14.5kHz 14.7kHz
Switch Position,,,,,,,,,,,,,, ? ,,,,,,,,,,,,,,? ,,,,,,,,,,,,,,,?

Actual freq. measured 9X8 13.7kHz 13.9kHz 14.1kHz
",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, " 5.75 13.8kHz 14.0kHz 14.2kHz
Switch Position,,,,,,,,,,,,,,,,,,,,,,,,, R,,,,,,,,,,,,,, L ,,,,,,,,,,C


Advertised audio frequency 630Hz
I found the tones to be far more complex than a single frequency, more like a harmonica. I tried my best to identify the dominant tones and the ranges.

Audio Tones/Pitches: Disc*,,,,, AM1*,,, AM2*,,, Batt Test,,, Thresh Cont Lowest Tone,,, Thresh Cont Full CW
Low Range,,,,,,,,,,,,,,,, 280Hz,, 240Hz,,, 365Hz ,,,390Hz ,,,,,,,,,,,,,,,,,,,,240Hz,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 365Hz
High Range,,,,,,,,,,,,,,, 590Hz ,,480Hz,,, 730Hz
* Disc tones are combined as one, while AM High-Low tones will "sweep". Consider AM1&2 each as one combined, sweepable tone.

I tried to repair this so it's readable.
I'd like to hear back from anyone who can do frequency tests on their C or V
Very curious if the variations are consistent from unit to unit :shrug:

Re: Cibola Bench Test
Posted by: zoli
Date: February 19, 2012 01:52PM
Vaquero:

5x10 coil
Frequency 14.05 KHz
frequency switching center
Tx = 13Volt

Re: Cibola Bench Test
Posted by: comcat
Date: February 22, 2012 03:07PM
errr,cool,,,,but what does this mean,,,am totally lost... ??????????????????????? :ukflag:



Edited 1 time(s). Last edit at 02/22/2012 03:09PM by comcat.

Re: Cibola Bench Test
Posted by: scoper
Date: February 22, 2012 04:12PM
It proves one thing comcat.......those two are far more intelligent than me:please::smile:



Edited 3 time(s). Last edit at 02/22/2012 04:16PM by scoper.

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Re: Cibola Bench Test
Posted by: POLEWAGGER
Date: February 22, 2012 07:18PM
Quote
zoli
Vaquero:

5x10 coil
Frequency 14.05 KHz
frequency switching center
Tx = 13Volt

What did you use to test?
My measurements were taken with an inductive pickup so there would be no interference with the circuit.

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Re: Cibola Bench Test
Posted by: POLEWAGGER
Date: February 22, 2012 07:32PM
Quote
comcat
errr,cool,,,,but what does this mean,,,am totally lost... ??????????????????????? :ukflag:

Just trying to get some across the board figures on how much variation there is from unit to unit.

Hz = cycles per second.
Induction is the electromagnetic field that the coil produces.
A simple coil of wire can be used in close proximity to the search coil to take voltage and frequency measurements.
My voltage reading is a nominal measurement taken with a specific inductive pickup, and only used for reference. The frequency can be measured with any inductive pickup and a frequency counting device.

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Re: Cibola Bench Test
Posted by: POLEWAGGER
Date: February 22, 2012 07:39PM
Quote
scoper
It proves one thing comcat.......those two are far more intelligent than me:please::smile:

Nonsense, jibberish, poppycock, boulderdash!
All you need is a frequency counter of some sort, and a coil of wire of some sort.
It's as easy as 2X2=5!

Re: Cibola Bench Test
Posted by: comcat
Date: February 23, 2012 10:16AM
Quote
POLEWAGGER
Quote
scoper
It proves one thing comcat.......those two are far more intelligent than me:please::smile:

Nonsense, jibberish, poppycock, boulderdash!
All you need is a frequency counter of some sort, and a coil of wire of some sort.
It's as easy as 2X2=5!
YES,,,but would that mean the end of civilisation as we know it ??? hmmm !

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