Pulse Delay Setting Question...

[Anonymous]

I recently had a wonderful phone conversation with Mr. Bill. Mr. Bill, you are very helpful. As a result of our conversation I am thinking about purchasing an Aquasearch V.2 for saltwater and appreciate thoughts from all. Regarding pulse delay-If 10 is the best setting for gold jewlery, would I generally be able to run the Aquasearch at 10? Or would I often encounter situations where pulse delay would have to be increased for stability? If this is the case, then <span style="background-color:#ffff00;">what advantages </span>does the Aquasearch offer over other pulse detectors that run at 15-20, set by the factory, such as the Whites PI Pro? Next, how well does the 11" AS coil pinpoint? And generally on a pulse detector used in salt, is a larger coil better, or cause problems? Thanks, CC. <img src="/metal/html/confused.gif" border=0 width=15 height=22 alt=":?"> <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt="">

 

[Anonymous]

Hi Cabochris,
The pulse delay on the Aquasearch is made variable, so that you can adjust for different situations. A delay of 10uS is the best for sensitivity to small gold jewellery, but dropping back to 15 is not going to dramatically affect the sensitivity except for things like ear ring studs, very thin chains, broken rings etc.
Two things that do affect the shortest pulse delay that can be used are a) the salinity of the water, and b) the nature of any wave action. These two factors are interdependant, as wave action in more saline water will give the greater effect. Certain places on the coast have the sea water diluted due to river outflow, and here the effects are much less. The nature of the beach can also have an effect. i.e. the ratio of solid material to water; underlying clay or bedrock, and any iron mineralisation present. Some detectors do not have an adjustable delay and this would limit their flexibility.
As has been mentioned in other posts, the combination of variable delay and variable SAT to counter the above effects with minimum impact on detector performance, are valuable features of the GQ SS and Aquasearch.
The 11in coil gives the best compromise between detection range and pinpointing of small (ring size) targets. Larger coils would be affected more by water salinity and waves.
Eric.

 

[Anonymous]

Thanks for your help Mr. Foster! I feel the Aquasearch would be a detector of choice for Professionals. It looks all business too! There are just a few more things I could use some help on. A quicker pulse delay equals more sensitivity to gold jewlery, such as chains and broken rings ect,ect.. Am I then correct to think, that a large deep gold ring, has now become a small gold target for a metal detector and thus a faster delay setting might detect that ring, when a slower delay might not, despite that it is a larger target? Also, I am grasping basic pulse concepts and find that some marketing/terms by manufacturers, helps to confuse things. Is the gain control on the PI Pro really a gain control? Is a gain control a good thing on a pulse detector? Does the AquaSearh have /need a gain control? Thanks again, Cabochris.