AQ Impulse, Depth Testing, Emi Rejection Issue

[Tony]

1 hour ago, bklein said:

I don’t recall really noticing a difference in behavior with different delay settings.

I find that noticeable delay settings are probably in the order of around the 5uS mark……that is to say, a delay of 15uS is fairly distinct from a delay of 10uS but a delay of 10uS v 13uS may sound about the same. With the extremely limited delay range of the AQ then I’m not surprised by your impressions and it would appear that the first 180 degrees of rotation of the delay knob doesn’t really do much at all in regards to “useful audio”.

[cjc]

It takes quite a while to learn to hear the subtlties of  the AQ's delay  ranges.  Down below 10 there's this background noise that is not the machine performing at it's best, intterfering with the smoothest threshold possible.  In still water these low settings might be viable but not in my conditions.  With a pulse, nothing is more important than a smooth threshold.  Handling  the coil is easier at these higher levels.  As with all signal  balancing challenges, practice hearing the extremes.

cjc

[cjc]

On 1/12/2023 at 3:18 PM, eclipse said:

Where can I find extra coils for the AQ? Are those even available for sale? I only have  the large stock coil.

The small 8" is  available from the factory. This is  a fantastic  coil that also helps  you to  really  understand the performacne of this detector. 

cjc

[cjc]

On 1/25/2023 at 9:41 PM, Tony said:

I don’t find much in calm water…….pretty sure that the sand has had time to settle and bury the gold. I have one of those neoprene headbands which works well in securing the phones or use the bone-phone (Sea Hunter) if it’s not too windy. 

I like to sit behind the 2-3 foot breakers and then duck in behind the whitewater……..with one eye on what’s coming in next ?

The “impact zone” is where the gold is…..either lost there directly from swimmers or moved/uncovered there by Mother Nature.

Love it……have that area to myself as no one else is crazy as me. The Nox’s get munched up as well and leak from water impact ?

this isa trick I use too to duck past the intense break  zone.  gotta  watch that undertow and those combers though...?

cjc

[bklein]

4 hours ago, cjc said:

The small 8" is  available from the factory. This is  a fantastic  coil that also helps  you to  really  understand the performacne of this detector. 

cjc

I have one but never tried it. I thought too small for general hunting in beaches. Where should it be used and what is good about it?

[cjc]

Very, very powerful and deep.  smaller object sensitvity.  The machine\s operating characteristcs  are easier to recognise  with this smaller coil--how your settings changes affect performance.  Try it at 7uSc, full  Sens, zero  ATS and reject. All the big coil problems  are gone.   Great to learn the machine with.  

cjc

[Joe Beechnut OBN]

Clive did you get any of the 10 inch coils that Eric Foster made? The 8 has its place but I really like the 10 the best, the 12 can be on the sensitive side to the conditions, calm waters its fine but once it starts getting ruff it really takes some fine tuning and coil control to make it work.. For me the 10 seems to be right at the edge of perfect, for my conditions. 

Anyone message Alexandra lately? 

[cjc]

6 hours ago, Joe Beechnut OBN said:

Clive did you get any of the 10 inch coils that Eric Foster made? The 8 has its place but I really like the 10 the best, the 12 can be on the sensitive side to the conditions, calm waters its fine but once it starts getting ruff it really takes some fine tuning and coil control to make it work.. For me the 10 seems to be right at the edge of perfect, for my conditions. 

Anyone message Alexandra lately? 

Ya, I have two.  Definately the optimal  size for this machine--also very deep with fewer problems.   In the thread Alexandre states  that the AQ can't be used around houses--Ive had these kinds  of problems resort hunting--just too much juice in  the ground--even  when you go  out into the water.     Still fiddling though with the coils  and FQ control.

rgrdz clive