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305
- Thread starter waltship
- Start date
BarnacleBill
New member
Besides the Noise Cancel feature on the new X305, it can use 7.5 & 18.75kHz coils. By changing frequency and/or type of coil you can sometimes mitigate interference. i.e. I have an area with buried utilities in a gravel road I detect around. The utilities include electric, cable, data & telephone in separate conduits spaced about 7 feet deep and spread about 7 feet wide. It is one of the areas I use as an interference test bed. I will test a detector by walking down the center line of the road and adjusting sensitivity plus frequency shift to see what the response is. I then will make graduated passes moving 3 feet off of the center line, and seeing at what point I can push the sensitivity back up to what would be a normal level for the surrounding soil.
Walking down the center line will cause severe problems for a Fisher CZ20 or CZ70. Both the Fisher ID Excel & Edge need to have the sensitivity reduced from 8 to 6, where "8" is how I normally run them in this area. Once 10 feet off of the center line the above detectors can be brought up in sensitivity, and then 15 feet off center line all can be brought to a normal level.
The X-Terras are model citizens with both the 7.5kHz & 18.75kHz coils of all styles and sizes, it's as if the interference doesn't exist. But put on the 3kHz concentric 9 inch, and whoa Baby! At 20 feet off of the center line the detector is still unusable. At 30 feet the interference finally starts to abate and the detector calm down. I suspect you really need to be out to 40+ feet to not desensitize the detector to buried targets.
Because of the variety of signals/frequencies buried in the road, it's difficult to determine which signal is interfering with which detector. But the advantage of having a multiple frequency detector becomes evident rather quickly.
Unlike some famously noisy detectors that are only quiet because they are DOA or in transit for repair.
HH
BarnacleBill
Walking down the center line will cause severe problems for a Fisher CZ20 or CZ70. Both the Fisher ID Excel & Edge need to have the sensitivity reduced from 8 to 6, where "8" is how I normally run them in this area. Once 10 feet off of the center line the above detectors can be brought up in sensitivity, and then 15 feet off center line all can be brought to a normal level.
The X-Terras are model citizens with both the 7.5kHz & 18.75kHz coils of all styles and sizes, it's as if the interference doesn't exist. But put on the 3kHz concentric 9 inch, and whoa Baby! At 20 feet off of the center line the detector is still unusable. At 30 feet the interference finally starts to abate and the detector calm down. I suspect you really need to be out to 40+ feet to not desensitize the detector to buried targets.
Because of the variety of signals/frequencies buried in the road, it's difficult to determine which signal is interfering with which detector. But the advantage of having a multiple frequency detector becomes evident rather quickly.
Unlike some famously noisy detectors that are only quiet because they are DOA or in transit for repair.HH
BarnacleBill
Jackpine Savage
Active member
Schilltz!! 
Shenandoah Digger
New member
I have an Xterra 30 & 70. The 30 was a great deal at the time for $400, but with the new features of the 305 Minelab has made the absolute best ID detector for $400 on the market. I really can't think of a detector that comes close.
Trackerman
New member
I agree i have an xterra 305 and an Xterra 70 and like the 305 better it rocks .They really improved the 30 with this 305 its like an xterra 50 but better for less money
carloscanle
New member
i have my new x terra 305 and im very satisfied with it.
im a peruvian relic hunter and in my country we have a lot of problems with mineralized grounds and big antennas...
i used before some whites and other brands of detectors and some of them simply stop working in some places where i prospect.
this machine works in those places without problems.
i found a 1862 silver coin with a bullet hole in my first day with the machine in a battle camp, place where anybody can prospect before because is in front of a group of tv and radio antennas...is the first silver coin with a bullet hole found in my city....
i was impressed with this!
im a peruvian relic hunter and in my country we have a lot of problems with mineralized grounds and big antennas...
i used before some whites and other brands of detectors and some of them simply stop working in some places where i prospect.
this machine works in those places without problems.
i found a 1862 silver coin with a bullet hole in my first day with the machine in a battle camp, place where anybody can prospect before because is in front of a group of tv and radio antennas...is the first silver coin with a bullet hole found in my city....
i was impressed with this!