I read some test results, be them in air above the coil, using a 50c coin and a 4500 set in Enhance with an 18" mono = 63cm, 15" Evo = 64cm  & 19" Evo = 65cm and they were all fairly similar.

Therefore I am curious with what size mono coil and settings on the QED would be required to produce a similar result with the 50c coin?

Goldman if possible could you do the same test with your QED.

I appreciate that Goldman.

Maybe you could also share the results of your planned test at the Marybourgh test site. Also in regards to that 5oz lead test target at that site there seems to be some confusion at what depth it was buried at as I had read it is actually at 26”.

One thing that is annoying with testing & results is when there is very little mention of the major settings on the detector that were used such as Search Mode, Soil Timing, Coil/Rx, Gain, Stabilizer, Audio Type for the GPXs. Then you have on the GPZ Gold Mode, Ground Type, Sensitivity, Volume, Audio Smoothing. However if Factory Default settings were mentioned then all of the above is known which had been mentioned for the results in my previous post with the GPX4500 although no mention of which Search mode although I believe it was set in Deep.

At least with the QED there appears to be 4 major settings that need to be of mention THS-B,THS-A, Gain & Mode which makes it less complicated. 

Therefore I look forward to your air test results with the QED & 50c coin and with what coils used.

Actually BW I came across several video tests at the Laanceoorie test site on the Detectronics Australia website displaying video tests with the SDC and GPX.

Although these detectors in the videos had been modified I think by a member here Mick “Mechanic” then in this particular video “Modified SDC 2300, 50 cent piece @ 12 inches w/ 12" Nugget Finder Coil” the testing fellow (not sure if he is Mick) said not all coils run on a standard SDC as it is quiet fussy and the NF 12” Advantage coil he used is about the biggest you can run on a standard SDC. He also displays in further SDC tests videos with the modified SDC using a NF 18” & 16” coil on the 50c coin and another test out in the field with the modified SDC with an NF18" coil on a Beer Can under the ground at 1 metre depth.

The thing that stands out is the SDC’s erratic threshold and he explains it due in his video tests to feedback from the internal speaker however many YouTube videos that I have viewed online the SDC does display an erratic threshold.  

Gary.

Considering that the SDC is a redundant and re-badged cheap  land mine detector the RP is outrageous.It would seem that the RP is to be increased further. ML don't even have the decency to rectify some of the well documented serious ergonomic problems with the SDC to justify  the increase in price!!!!
doug

Btw I hope Mick " Mechanic" does not mind me making reference to his testing here as from what I have read and been told he is a top fella and very switched on at what he does including repairing the Lithium batteries and ML detectors if the need arises.

Gary.

Oh!....so I assume then that the fella testing in the videos is not Mick "Mechanic" and maybe Mick has nothing to do with Detectronics Australia?

Gary.  

Thanks D777.

It has been a long time since Mick "Mechanic" had posted here on this site.

I see "AuMan" signs off with Mick as well over on P'inOz forum.

Anyway I have deviated away from the subject of this thread, sorry Goldman.

As far as I am concerned when detecting with my QED PL2 out on the goldfield with my Commander 8" mono it would nothing behind for an SDC with its 8" coil.

Gary.  

Well I have tested a QED and a 45 with both a 50c Australian coin and a 1oz gold nugget in the goldfields around Maryborough, vic.

In both cases the 45 achieved greater (air test) depth.
———————————————-
GPX4500 with 19” EVO
The experienced 45 user runs his very hot, using a SP01 audio enhancer with headphones
* enhance
* gain=15, max in a 45
* Search mode=general
* Audio=deep
* Stab=11
* Motion=v slow

50c coin=63cm
Gold=46cm

When reducing settings to more normal settings, the following was achieved:
* Enhance
* gain=9
* Search mode=deep
* Audio=deep
* Stab=11
* Motion=v slow

50c coin=58cm
Gold=40cm
——————————————
QED using the standard speaker:
achieved 4cm less on the gold than the 45 using the 19” EVO, however only 2cm less using when using the 11” elite.

Not sure what difference using a SP01 audio enhancer with headphones on the 45 Vs the QED standard speaker made to the results.

with 19” EVO
A=30
B=6 above NULL
G=10
Mode=4

Depth
50c coin=34cm
Gold=36cm

QED with 19” EVO
A=85
B=1 above NULL
G=10
Mode=4

Depth
50c coin=34cm
Gold=36cm
———————————————
QED with 11” elite
A=85
B=2 above NULL
G=10
Mode=2

Depth
50c coin=34cm
Gold=38cm


QED with 11” elite
A=30
B=6 above NULL
G=10
Mode=2

Depth
50c coin=34cm
Gold=36cm

For some reason the 11” elite achieved greater depth than the 19” EVO, getting close to the 4500 depth on the 1oz nugget.

Testing the QED with a 14” elite, using settings A=30; B=5 above NULL achieved 37cm on the 1oz gold, less with a high A and low B.

Cheers Goldman

I dont have a 1oz gold nugget but i may try the air test with a 50c piece with a Minelab 11” mono and a 20” NF Advantage.

Goldman, did you wave over with the target on the ground or over above the coil?

Yeah no probs Gary.

I havent checked the longevity of the 3400ma’s against the Nexcell 2600ma’s as my detecting has been intermittent.

Interesting you have had to test with the coil perpendicular to the ground!

Also interesting is the distance difference with the 1oz nugget! Could we see a difference in ground and with a different coil as some detectors prefer some coils over others?

Al.