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Mr. Bill or Eric (Tx Max vs. Econ)...

A

Anonymous

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Yesterday I was fooling around with the Aqua Star at home and did some air tests. I did not notice any significant difference in air test depths between Max and Econ settings. I used gold rings, nickels, and a variety of others items. I did find that Rx Sensitivity, Pulse Speed and SAT changes made a more significant difference in depth tests. Did I miss something? Will performance in the field show different results between Max and Econ for the Tx?
Thanks
Jerry
 
Hi Jerry,
The power switch reduces the TX pulse width from 100uS to 50uS. In doing so, it just about halves the current drawn and therefore extends the battery life. Most gold rings have fairly short time constants for the induced eddy currents, and a 50uS pulse generates almost as much signal as a 100uS pulse. Hence the detection range will not change to a noticeable degree.
Where you would be able to see more difference is in higher conductivity silver or copper coins. Try a clad and see what happens there.
The Goldquest SS uses a 30uS TX pulse, and that gives very good range on most gold rings. There is a definite drop off though in high conductivity items. However, turning the frequency control back also increases the TX width and will give more range on, say, clads at the lower settings.
The Aquastar was designed to give the user a choice of different TX and RX settings, and if for most rings there is little difference in range between Max and Economy settings, then use that and stay out searching for twice as long.
Eric.
 
Eric... What is the TX pulse width of the HH PI, and why only half the battery life of the GQ?
 
Hi Jeff,
With the type of pulse generator used in the HH PI and the Goldquest, the TX pulse width does not materially affect the current drain. The reason being, that as the frequency conrol is adjusted and the Tx pulse width is increased or decreased, the pulse frequency alters in proportion, so the current is always the same. What does affect the battery life in the two detectors is the type of battery used. The HH PI has to use PP3 batteries because of the limited room in the headphone cups. The Goldquest uses AA batteries which have considerably more capacity.
Eric.
 
If the Economy setting on the Aquastar and using the Higher Frequency setting the Goldquest give reduced depth on high conductivity targets such as clad coins is there also a reduction in depth on large gold rings (example:a man's class ring) at these settings? The reason I ask is that Class Rings tend to read in the Coin Area of TID type detectors indicating that they are a higher conductivity target. Or does a PI see all size gold rings as low conductivity targets regardless of size. Gold and VLF Detectors I know very well. When it comes to Modern PI's and Gold I still have a lot to learn! Thanks
HH
Beachcomber
 
Beachcomber
The reject/frequency control on the Goldquest SS performs a multitude of adjustment to the circuit as it
 
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