Posting the below video for Ridge Runner!
I will let him explain whats going on to all those interested.
Over to you John
I will let him explain whats going on to all those interested.
Over to you John
ozziii said:Nice video. Good to see how well the Whites P.I machines handle bad EMI. I know the SPP does pretty well & should be better once I get more practice using it.
ozziii said:Thanks John.
It has the switch fitted, good addition that one, sounds like I'm doing most stuff pretty right apart from the frequency, I was turning the dial more when I first started but was told it only need to be turned a very small amount, I thought a small 2mm movement may have been alright but will try what you say & make smaller adjustments.
Apart from that I'm not sure what else to do.
grubstake said:Is the coil cable secure against any possible movement? It might help if you could put up a pic showing the cable run.
[RR/John: I think I remember a pic you posted somewhere showing how to best secure the cable, with the first 300mm or so from the coil running straight up the shaft?)
Ridge Runner said:ozziii said:Thanks John.
It has the switch fitted, good addition that one, sounds like I'm doing most stuff pretty right apart from the frequency, I was turning the dial more when I first started but was told it only need to be turned a very small amount, I thought a small 2mm movement may have been alright but will try what you say & make smaller adjustments.
Apart from that I'm not sure what else to do.
Remember its not like a radio dial, you must turn it a fraction and then wait for about 5 or 10 seconds and see if it settles down and keep doing that until it runs smooth or close to it and if it don't then get it as close as you can and then try dropping the gain small amounts and it sound be fine, I have never had to turn my SL Down here in the City so yours shouls work the same, ok
good luck,, John
Goldpick said:You will still get the odd pip coming through, though these signals are often not repeatable, hence are unlikely to be genuine targets
With my limited experience on the SPP so far, the only thing that comes to mind may be to do with the ground balancing side of things. Not sure whether your GB is being offset slightly low, which will result in high tones creeping through everytime you lift the coil and then lower it again, or maneuver over or touch objects on the ground.
One thing I did notice, as previously mentioned, is how easily the GB control can be knocked out of adjustment after intially setting everything up - really requires some rubber washers to stiffen up the control pot. Perfect ground balance is on a real knife edge on the SPP, and if the knob is even slightly moved, particularly below the perfect GB setting, it will cause the detector to sound off with occasional high tones in the all/low conductivity settings.
I had a couple of instances where I thought something was amiss, and surely enough it was a slight bump to the GB control that caused the issue. Maybe also have a play with slightly advancing the GB over the initial setting (as mentioned in the basalt topic), and see whether this improves things.
My MJ coils aren't touch sensitive when running over or hitting ground cover, hence why the GB came to mind. I could be wrong, just trying to discount some scenarios, as I certainly haven't had the same issues that you are currently experiencing.
Not sure whether you are over doing it with the frequency tuning. I was running my SPP only 300m away from a microwave/mobile tower with barely any interference, and that was without touching the frequency control. I did the 360 degree tuning, and quite frankly all I got was the odd pip from the detector, and that was pretty hard to pin down on what direction it was eminating from, even with the tower nearby. Whether the HT powerlines are a lot harder to tune out, maybe so, though you are a fair distance away
If you have what you think is a near perfect frequency tune when checking in the air, then I doubt the corresponding falsing you get on the ground would be related to EMI.
ozziii said:Here's how the cable is done, I got the clips & ran it straight up the shaft after speaking to Brian from Bairnsdale Prospecting.
I ran the cable up the back of the shaft to protect it from getting hit by bushes & branches etc when in tight places.
http://i1258.photobucket.com/albums/ii524/ozziii4/Detecting%20Stuff/12308382_10208269728523653_306473427604857871_n_zps7pkbqroq.jpg
Ridge Runner said:ozziii said:Here's how the cable is done, I got the clips & ran it straight up the shaft after speaking to Brian from Bairnsdale Prospecting.
I ran the cable up the back of the shaft to protect it from getting hit by bushes & branches etc when in tight places.
http://i1258.photobucket.com/albums/ii524/ozziii4/Detecting%20Stuff/12308382_10208269728523653_306473427604857871_n_zps7pkbqroq.jpg
Well that seems safe, it's good to see it done right, you would not believe some of the pictures I have seen,lol.
Good Luck.
john
KarlS said:Ozie some EMI is broadband and can not be tuned out. I use 7.5 inch mono coil and 5 x 10 DD coil and both are immune to falsing when bumped. The 7 x 11 DD MJ coil gives sometimes pip when bumped hard. If the falsing happen only with RB coil and not with standart coil then the coil or cable or conect or is faulty.
I find the Ground balance adjustment easy and quick after the mods. But I must admit that I don't know if the factory mods are same as the one that Reg come up with. I have agree with Goldpick that GB knob is easy to knock out of its setting, but except reduced sensitivity it does not make any difference. I use SPP often with GB 3.5 to 4 regales of ground mineralization to detect goldies.
Karl
ozziii said:Talking about broadband, made me think of my phone, always have it in top shirt pocket turned on, didn't think it would effect detector because its not transmitting anything & data/internet is turned off, but would there be a chance the phone could cause problems. Will turn it off & see if anything changes.
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