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INTERESTING DETAILS - VR SERIES DETECTORS
Putting aside the question of whether the VR series of LRLs works or not, what Mike(Mont) says is interesting.
His source of information is Bill Dunning, CEO of Vernell Electronics that developed the VR series of long range locators. The Magnacast 5000 consists of a RF transmitter with a coil transmitting antenna, and a hand-held "scan gun" receiver. What Bill told Mike(Mont) is to maintain the receiver sensor at a fixed distance of 13.5 feet from the transmitter coil and rotate the hand held receiver in a manner similar to a radio direction finder. Now, in order to maintain the 13.5 feet, you would walk in an arc 13.5 feet from the transmitter coil while rotating the sensor and looking for anomalies in signal strength along that arc. Presumably you will find an anomaly when you walk along the arc and cross a "signal line" from the target. According to Dunning, this anomaly can be an irregular response or a sharp drop in response of the receiver scan gun. Dunning also said it is important to set the RSL to get as close as possible to the threshold as possible. Also, looking at the instruction manual from the Vernell website, we see that the search area is limited to a 45 degree arc in front of the transmitter coil.
Magical 13.5 feet distance?
What comes to mind when listening to this kind of instruction are two things: First, what is the magical 13.5 feet distance? Is this distance related to the broadcast frequency and the wavelength of the RF that is broadcast? Does 13.5 feet correspond to a 1/4 wavelength for an 18 MHZ signal? Until we have more information about the 5000 model we cannot know the answer to the magic 13.5 feet distance.
Signal line can be easily tested:
A second thing that comes to mind is the "Scan Gun" sensor is intended to be used by rotating it from a fixed location, then moving it to various locations and rotating it again, looking for variations in received signal at the different locations. This sounds like the scan gun is a directional antenna being used to survey the plot of land in front of the transmitter. What Dunning suggests is you are looking for a "signal line" which we presume is a straight line terminating at the target. Fortunately, the existence of this "signal line" can be tested by placing a target on the surface of the ground and surveying the plot of land between the transmitter and the target. According to Dunning, we do not need to rely on long-time buried gold or dig large craters in order to verify these signal lines.
Where are the VR detectors really manufactured?
Another item of interest is the product line shown at Vernell Electronics is includes the VR1000, which looks to be identical to the VR1000B sold by a Chinese factory. While the Vernell Electronics VR1000 unit is priced at $2750, (same as the Chinese VR1000B), they have it on special for $1802.50. This is not the same unit as the Magnacast 5000 that Earthworm Jim asked about, with a listed price of $2500.
When we look at the Shanghai TianXun Electronic Equipment Co.,Ltd web page we see only the VR1000B LRL and 10 conventional metal detectors for use in treasure hunting. Most of their metal locating products are walk-through and security metal detectors: http://www.cnmetaldetector.com/product_class.asp
Further searching produces another website in Shanghai that sells a variety of the VR models as well as Mineoro and other conventional metal detectors. Their advertising for each of the Vernell products states they sell are made in the USA:
This makes me wonder if only the VR1000 is manufactured in China, and the other VR series locators are manufactured at in the USA. Or perhaps there was once an agreement to manufacture the VR1000 in China, and maybe it was later decided to change the manufacturing plans?
Where does Dell Winders fit into this picture?
Going back to the Vernell website, we see a variety of LRL models for sale including the earlier versions using pvc pipe parts holding brass rod probes to be placed in the ground and L-rods that connect electrically. But this brings us back to Dell Winders, who says he pioneered multifrequency discrimination, and placed the first "MFD" unit on the market in 1986. When you look at the products Dell sells, we see that the "Dell Professional Model GS" looks similar to the earlier models sold by Vernell electronics. We also find in this LRL forum an earlier thread where a LRL unit Dell sold had a label identifying it as a DELL (tm) OMNITRON with a V.R. model number. Even though this unit has Dell's label on the back, Dell claims he did not manufacture it, Vernell did. Dell said he only sold these LRLs. We also find a V.R. 800 Dell Omnitron that Dell sold years ago which looks identical to the Vernell VR 800 except for minor cosmetic differences. Dell has stated he does not manufacture the electronics in his electronic instruments. We no longer see these older V.R. models for sale on Dell Winders website.
Did Vernell Electronics manufacture Dell's V.R. electronic models?
Was Dell the inventor of this technology, or was Vernell Electronics?
Perhaps Dell could enlighten us about the history of the VR series of long range locators.
See the Vernell website here: http://www.vernellelectronics.com/products.cfm
See the Dell Winders website here: http://www.omnitron.net/using_page1.htm http://www.omnitron.net/del_prod.htm
Putting aside the question of whether the VR series of LRLs works or not, what Mike(Mont) says is interesting.
His source of information is Bill Dunning, CEO of Vernell Electronics that developed the VR series of long range locators. The Magnacast 5000 consists of a RF transmitter with a coil transmitting antenna, and a hand-held "scan gun" receiver. What Bill told Mike(Mont) is to maintain the receiver sensor at a fixed distance of 13.5 feet from the transmitter coil and rotate the hand held receiver in a manner similar to a radio direction finder. Now, in order to maintain the 13.5 feet, you would walk in an arc 13.5 feet from the transmitter coil while rotating the sensor and looking for anomalies in signal strength along that arc. Presumably you will find an anomaly when you walk along the arc and cross a "signal line" from the target. According to Dunning, this anomaly can be an irregular response or a sharp drop in response of the receiver scan gun. Dunning also said it is important to set the RSL to get as close as possible to the threshold as possible. Also, looking at the instruction manual from the Vernell website, we see that the search area is limited to a 45 degree arc in front of the transmitter coil.
Magical 13.5 feet distance?
What comes to mind when listening to this kind of instruction are two things: First, what is the magical 13.5 feet distance? Is this distance related to the broadcast frequency and the wavelength of the RF that is broadcast? Does 13.5 feet correspond to a 1/4 wavelength for an 18 MHZ signal? Until we have more information about the 5000 model we cannot know the answer to the magic 13.5 feet distance.
Signal line can be easily tested:
A second thing that comes to mind is the "Scan Gun" sensor is intended to be used by rotating it from a fixed location, then moving it to various locations and rotating it again, looking for variations in received signal at the different locations. This sounds like the scan gun is a directional antenna being used to survey the plot of land in front of the transmitter. What Dunning suggests is you are looking for a "signal line" which we presume is a straight line terminating at the target. Fortunately, the existence of this "signal line" can be tested by placing a target on the surface of the ground and surveying the plot of land between the transmitter and the target. According to Dunning, we do not need to rely on long-time buried gold or dig large craters in order to verify these signal lines.
Where are the VR detectors really manufactured?
Another item of interest is the product line shown at Vernell Electronics is includes the VR1000, which looks to be identical to the VR1000B sold by a Chinese factory. While the Vernell Electronics VR1000 unit is priced at $2750, (same as the Chinese VR1000B), they have it on special for $1802.50. This is not the same unit as the Magnacast 5000 that Earthworm Jim asked about, with a listed price of $2500.
When we look at the Shanghai TianXun Electronic Equipment Co.,Ltd web page we see only the VR1000B LRL and 10 conventional metal detectors for use in treasure hunting. Most of their metal locating products are walk-through and security metal detectors: http://www.cnmetaldetector.com/product_class.asp
Further searching produces another website in Shanghai that sells a variety of the VR models as well as Mineoro and other conventional metal detectors. Their advertising for each of the Vernell products states they sell are made in the USA:
This makes me wonder if only the VR1000 is manufactured in China, and the other VR series locators are manufactured at in the USA. Or perhaps there was once an agreement to manufacture the VR1000 in China, and maybe it was later decided to change the manufacturing plans?
Where does Dell Winders fit into this picture?
Going back to the Vernell website, we see a variety of LRL models for sale including the earlier versions using pvc pipe parts holding brass rod probes to be placed in the ground and L-rods that connect electrically. But this brings us back to Dell Winders, who says he pioneered multifrequency discrimination, and placed the first "MFD" unit on the market in 1986. When you look at the products Dell sells, we see that the "Dell Professional Model GS" looks similar to the earlier models sold by Vernell electronics. We also find in this LRL forum an earlier thread where a LRL unit Dell sold had a label identifying it as a DELL (tm) OMNITRON with a V.R. model number. Even though this unit has Dell's label on the back, Dell claims he did not manufacture it, Vernell did. Dell said he only sold these LRLs. We also find a V.R. 800 Dell Omnitron that Dell sold years ago which looks identical to the Vernell VR 800 except for minor cosmetic differences. Dell has stated he does not manufacture the electronics in his electronic instruments. We no longer see these older V.R. models for sale on Dell Winders website.
Did Vernell Electronics manufacture Dell's V.R. electronic models?
Was Dell the inventor of this technology, or was Vernell Electronics?
Perhaps Dell could enlighten us about the history of the VR series of long range locators.
See the Vernell website here: http://www.vernellelectronics.com/products.cfm
See the Dell Winders website here: http://www.omnitron.net/using_page1.htm http://www.omnitron.net/del_prod.htm
Attached Files
And are all good targets!
"WHAT HAS BEEN DONE, CAN BE DONE" 
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