AQ Impulse, Depth Testing, Emi Rejection Issue

[bklein]

Found two rings and about a dollar in change. I found so many tent stakes that I went to tone mode. Right away I hit a goldish ring. No marks, not likely gold. As I was leaving the wedge area I tried the volleyball court and found the probably stainless ring. AQ worked great.

[Carolina]

Thank goodness you finally got out with the AQ. Tone mode is 98 percent of my usage. Those 18k pigs will give a iron grunt, but the majority of them are deep in the wash on the rim so there I always dig the grunt. 75 percent of my rings come from lower to mid beach. I skip all the iron grunts there as it is mostly clad and or tent stakes and the likes. Time is of the essence in fresh drop season so I have little time for tent stakes. I pass up all pings off the edges also and pay attention to shape. If upper mid beach and lower gives a solid ping in tone mode, you can almost bet its gold. Good luck everybody!

[Joe Beechnut OBN]

On 1/6/2023 at 11:09 PM, Tony said:

 

What did the max pulse delay finally end up being. I know the dial says 11.5 but did Fisher extend this 15uS ?

If this is, I would say it looks good. Rarely do I go lower than 9. something that seems to work both of my AQs. If it is noisy at 10, I'll go up with the delay..calm the machine down. than go back down to 10 which is what I run most of the time. And this takes about 15/20 minutes. (looks like I am using 12 delay, going up to  15/20 than back to 12) .......Also the AQ is a warm up machine, the threshold climbs the first 15+ minutes, after adjusting, (lowering) it steadies.

[Tony]

2 hours ago, Joe Beechnut OBN said:

If this is, I would say it looks good. Rarely do I go lower than 9. something that seems to work both of my AQs. If it is noisy at 10, I'll go up with the delay..calm the machine down. than go back down to 10 which is what I run most of the time. And this takes about 15/20 minutes. (looks like I am using 12 delay, going up to  15/20 than back to 12) .......Also the AQ is a warm up machine, the threshold climbs the first 15+ minutes, after adjusting, (lowering) it steadies.

Joe,

Are the numbers in red actual delay “values”.

I have to admit that the delay range on the AQ is bewildering. How could a designer/engineer have a full control rotation only providing such a short range. Having 0.5 increments is pointless…..I’d be surprised if a user would be able to hear much of a difference in the “green” range……just as you suggested. This AQ has me scratching my head on a regular basis ?

 

 

[Carolina]

10 hours ago, Tony said:

Joe,

Are the numbers in red actual delay “values”.

I have to admit that the delay range on the AQ is bewildering. How could a designer/engineer have a full control rotation only providing such a short range. Having 0.5 increments is pointless…..I’d be surprised if a user would be able to hear much of a difference in the “green” range……just as you suggested. This AQ has me scratching my head on a regular basis ?

 

 

The picture that Joe shows is a proposed change in delays for the newer ( not released ) unlimited addition with several other changes such as drop in batteries. I do not believe that machine will ever be released. The AQ limited out in the wild now has the following delays. (7) (7.5) (8) (8.5) (9) (9.5) (10) (10.5) (11) (15). The (15) delay was a last minute change after all the face plates had been printed and is shown as (11.5) on the face plate but is actually (15). 

 

[bklein]

I was noticing I was having to turn down the threshold a few times. It had me wondering - is this due to battery voltage dropping or my brain? Also I would come across areas where there was tone with every swing in one direction (see other thread) and I needed the ATS to go to 12 to get rid of it (there is no 12). Although the tx power and depth do seem to be regulated over the battery range I do experience the detector behavior change as the battery nears its low threshold. It gets noisier and has spurious bursts. As the OBN battery and stock have different discharge curves you may notice this more with the stock than the OBN. No big deal, just something I notice.

I really dislike having to change batteries in the field. The connector pins just seem to really want to corrode in the salt environment. I keep the spare battery in a ziplock bag but this is not good enough.  I wrap every connection with electrical tape so I have to remove this and save it to be reapplied. The detector may be wet from previous hunting. Just not good - but I shouldn’t be trying to hunt for over 5 hours when I’m not finding much…

I hope to add an APTX LL tx setup so I can eliminate the wired headphones. The stock phones are susceptible to wind noise and could stand to be a bit louder.

[Tony]

10 hours ago, Carolina said:

The picture that Joe shows is a proposed change in delays for the newer ( not released ) unlimited addition with several other changes such as drop in batteries. I do not believe that machine will ever be released. The AQ limited out in the wild now has the following delays. (7) (7.5) (8) (8.5) (9) (9.5) (10) (10.5) (11) (15). The (15) delay was a last minute change after all the face plates had been printed and is shown as (11.5) on the face plate but is actually (15). 

 

Thanks for that information. Fisher finally makes a smart decision with the design but as you mention, it may never reach production which would be a great shame. I don’t think I’ve ever seen a detector introduced to the market that shows such potential but falls down in so many areas…..who knows, maybe something can be salvaged as the hard work has been done and the problems recognised as fixable.

[eclipse]

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

[bklein]

No rain today and I bought another microphone with no ANR chip so you can hear what I hear now. I’m using the 12.5” coil and stock battery this time. A little weaker in depth perhaps from earlier tries at this. I surely don’t see myself digging at things this weak.