By Joe D.
Just an update on my 800 that was sent out to ML on July 6th!
Just received shipping info for today's shipment, via USPS 2 Day priority mail! Pretty quick turnaround, considering Covid issues!! I had sent in all electronic parts for testing!!
And a Repair Center Email below!!👍👍
This was on TV in New Zealand tonight about a guy finding a gold sovereign with his Nox worth about $50,000 NZD, about 33,000 USD. It was an Aussie minted coin.
The video even has what I see as a typical Garrett user in it 😛 Just kiddin'
Detecting started out as an audio-only hobby, and for us prospectors it mostly remains that way. Even if you are just swinging a VLF you can't trust the VDI numbers in hot ground. Beep, beep, dig. Now the more experienced detectorists know that there is a lot more to audio signals than just beeps. There is shape, tone, volume, sharpness, rhythm. It becomes a musical performance that we get to decode with our brains to decide whether a target is worth busting out the pick for.
Why have detector companies not put more emphasis on developing audio responses? We get screens, target ID's, GPS, wireless audio, but the same old sounds. But the most important user experience - the sound the detector makes - has not changed much. For all-metal VLF or PI detectors you get a VCO audio response that rises with signal strength. That's it.
Ok, so rant mode off, now my pitch.
A simple mapping of a normal VCO (voltage-controlled oscillator) audio signal is SIGNAL STRENGTH = PITCH and VOLUME change. This goes back to the time when a hardware oscillator was directly tied to the audio output and use the signal voltage to create an audio signal. You get a zip on all targets, and though the shape of the signal will vary based on what the target is, there is no indicator of target phase (or X/Y component). You want any audio info on that for a VLF, you have to switch to a tone mode.
Here is what a boot tack and and nugget sounds like on a VLF with a normal VCO audio (like a gold machine or all-metal mode):
Now if you were to instead tie the PITCH of the signal to the PHASE, and the VOLUME to the STRENGTH, you would get more information. It might look like this:
You can get a response similar to this by using 50 tones on the Equinox, but to my knowledge, no detector uses this kind of audio mapping in VCO mode. Do you see how much more information this would present to a seasoned detectorist? Especially with iron targets, which tend to have a very confused signal, the pitch would jump all over and should be easier to distinguish.
I believe this type of audio response might be able to be used with the GPZ (it's kind of there already with the hi/low tones) or any other detector that reads X and Y signal responses. Instead of having both PITCH and VOLUME tied to the composite signal like it's 1950, the responses would be independent and give the user more information - no screen required. For beginners this would not be good since it is hard enough for them.
Hope this makes sense, let me know what you think (especially CARL).