A
Anonymous
Guest
Saturday, I was at a school where I regularly recover deep coins. This schoolyard is HUGE. I doubt it'll ever be hunted out.
I happened to have my CZ-20 with me, as I've been going to a couple lakes on my days off. I was using my CZ-5, and had already recovered a few 5" deep targets. Then, I decided to test the "urban myth" that two CZ's operating in close proximity, while not close enough to cross-talk, will still affect each other by killing the depth. I did this "a la MythBusters" style. Now, it wasn't exactly scientific, but it did make me realize a few things. Here's what I did.
I was using my CZ-5, hipmounted, with the 10.5" coil. I had GB'ed my detector using the bobbing method, and had it set slightly negative. I was running in SALT mode (I had GB'ed in SALT as well), Sens was at 5, and I was hunting in 0 Disc, so I could hear all tones. New batteries were installed into both CZ's.
Ok, begin searching. I was running a grid pattern in the infield of a softball field. I had never hunted that particular part of the schoolyard before. I had already recovered some deep Wheat's before I thought to run a test on my next deep target. As I searched, I paid special attention to the indicated depth of the targets. I wanted a deep one.
Finally, I got a hit at an indicated 5". This hit bounced from Iron to High Coin, giving me a high tone about every 3 swings in 5. It would do this from north, east, west, and south. At this particular site, that screams "Dig me!".
Ok, test time. I pulled my digger, and dropped it point-first into the dirt to mark my target (the digger only penetrated an inch. I turned off my CZ-5 and went to my car to get my 20.
Now, I'm by myself, so I don't have anyone to hold the unit like you would actually do if hunting. I just laid it on the ground. My 20 has the 10.5" coil, and it is of course locked into SALT mode. Sens on the 20 was around 8. I didn't bother to GB the 20, nor did I adjust the Sens, as I only wanted it to transmit.
I place the 20 on the ground, with the coil pointed towards my target. The 20 was due north of the target, and about 30' away. I walked back to the target, sheathed my Lesche, and turned on my CZ-5. I could heat faint cross-talk in both Auto-Tune and 0 Disc on my 5. I passed the coil over the target, and could still hear it. It was still giving me high tone hits 3 times out of 5, from four directions.
I moved my CZ-20 closer to the target, to about 12 - 15' from the target. I went to the target, and could still hear it. I repeated this once more, moving my 20 to about 8' from the target. The cross-talking was pretty bad. I passed the coil of my CZ-5 over the target. I COULDN'T HEAR IT 90% OF THE TIME! And when I did get signal, it was delayed, so that it sounded off when the coil was about 3" away from it, instead of directly over the target.
I decided to put my 20 back in my van, and recover the target. It was an early 60's Mem' Penny at 5".
10 minutes later, I passed my coil over a target that indicated 6" down on the depth meter. It gave me roughly one high tone hit for every two passes. That's consistent with the dirt around here (lots of iron in the dirt).
Again, I went back to my van, got out my CZ-20, and repeated the experiement.
I started getting delaying, inconsistent hits from the target when my 20 was in the 12 - 15' range. At around 8', I could get no response whatsoever.
I ended up recovering a Wheat at 6".
Right now, I am hypothsizing that the deeper the target, the further away another CZ has to be before the crosstalk masks the target's signature.
I could have even gained some further proof, as right before I left, I got a signal that indicated between 6 and 7" down. It only gave me a high tone one pass out of four, but, would repeat a high tone in all four directions, and was a nice, tight, signal that didn't "move" around like iron falsing as a coin will. I ended up recovering a '26 Wheat from around 7" down. I didn't test this target, as I would have been late for work.
Rest assured, I'll carry my CZ-20 with me for awhile, and the next time I get a deep one, I'll test it.
HH from Allen in MI
I happened to have my CZ-20 with me, as I've been going to a couple lakes on my days off. I was using my CZ-5, and had already recovered a few 5" deep targets. Then, I decided to test the "urban myth" that two CZ's operating in close proximity, while not close enough to cross-talk, will still affect each other by killing the depth. I did this "a la MythBusters" style. Now, it wasn't exactly scientific, but it did make me realize a few things. Here's what I did.
I was using my CZ-5, hipmounted, with the 10.5" coil. I had GB'ed my detector using the bobbing method, and had it set slightly negative. I was running in SALT mode (I had GB'ed in SALT as well), Sens was at 5, and I was hunting in 0 Disc, so I could hear all tones. New batteries were installed into both CZ's.
Ok, begin searching. I was running a grid pattern in the infield of a softball field. I had never hunted that particular part of the schoolyard before. I had already recovered some deep Wheat's before I thought to run a test on my next deep target. As I searched, I paid special attention to the indicated depth of the targets. I wanted a deep one.
Finally, I got a hit at an indicated 5". This hit bounced from Iron to High Coin, giving me a high tone about every 3 swings in 5. It would do this from north, east, west, and south. At this particular site, that screams "Dig me!".
Ok, test time. I pulled my digger, and dropped it point-first into the dirt to mark my target (the digger only penetrated an inch. I turned off my CZ-5 and went to my car to get my 20.
Now, I'm by myself, so I don't have anyone to hold the unit like you would actually do if hunting. I just laid it on the ground. My 20 has the 10.5" coil, and it is of course locked into SALT mode. Sens on the 20 was around 8. I didn't bother to GB the 20, nor did I adjust the Sens, as I only wanted it to transmit.
I place the 20 on the ground, with the coil pointed towards my target. The 20 was due north of the target, and about 30' away. I walked back to the target, sheathed my Lesche, and turned on my CZ-5. I could heat faint cross-talk in both Auto-Tune and 0 Disc on my 5. I passed the coil over the target, and could still hear it. It was still giving me high tone hits 3 times out of 5, from four directions.
I moved my CZ-20 closer to the target, to about 12 - 15' from the target. I went to the target, and could still hear it. I repeated this once more, moving my 20 to about 8' from the target. The cross-talking was pretty bad. I passed the coil of my CZ-5 over the target. I COULDN'T HEAR IT 90% OF THE TIME! And when I did get signal, it was delayed, so that it sounded off when the coil was about 3" away from it, instead of directly over the target.
I decided to put my 20 back in my van, and recover the target. It was an early 60's Mem' Penny at 5".
10 minutes later, I passed my coil over a target that indicated 6" down on the depth meter. It gave me roughly one high tone hit for every two passes. That's consistent with the dirt around here (lots of iron in the dirt).
Again, I went back to my van, got out my CZ-20, and repeated the experiement.
I started getting delaying, inconsistent hits from the target when my 20 was in the 12 - 15' range. At around 8', I could get no response whatsoever.
I ended up recovering a Wheat at 6".
Right now, I am hypothsizing that the deeper the target, the further away another CZ has to be before the crosstalk masks the target's signature.
I could have even gained some further proof, as right before I left, I got a signal that indicated between 6 and 7" down. It only gave me a high tone one pass out of four, but, would repeat a high tone in all four directions, and was a nice, tight, signal that didn't "move" around like iron falsing as a coin will. I ended up recovering a '26 Wheat from around 7" down. I didn't test this target, as I would have been late for work.
Rest assured, I'll carry my CZ-20 with me for awhile, and the next time I get a deep one, I'll test it.
HH from Allen in MI