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so far I really like the TDI. no negatives as of yet. SUPER deep even in my good soil! I gets every real deep target in my test garden with ease in Ground balancing mode. In regular Pulse mode (GB turned off).....its astonishingly deep!(deeper than GB mode)
It DOES have a language that will require a few hours in the field to learn, but so far seems to be an easy machine to use. there ARE a fe
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Streak!
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Thomas Dankowski Metal Detecting Forum
you 'may' have iron notched..and in running a higher disc setting you may have iron notched "in". look and see if you have a partial or no slash over iron when you have the disc set AT 15. also, the audio response is more modulated in 1F than it is in 1, and I've found that it tends to be not nearly as clean audio-wise as 1 is. 2F is quite "busy" too, but over t
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Streak!
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Thomas Dankowski Metal Detecting Forum
While the 5" DD does not have the depth the 11" coil has, it DOES have improved separation and increased sensitivity to small conductors. I've gone back to many a cellar hole I'd previously pounded, and was pleasantly suprized at how well the 5" DD did. Its also a bit more immune to Rf interference. Glad your getting on well with it!!
I thought you had sold your F75???
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Streak!
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Thomas Dankowski Metal Detecting Forum
Im fortunate enough that most all of my sites allow "0" disc, and 99 sensitivity settings. It "may" get a bit dicey from time to time, but I'm able to hunt like this in a full 95% of my sites. On occasion I DO have to reduce the sens to 95....or boost the disc to 5 or 6, but thats the exception here rather than the rule, and its usually due more to the type of ground rath
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Streak!
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Thomas Dankowski Metal Detecting Forum
All different soil types will Gb a bit different,(higher or lower) on soils ranging from salt to magnetite (black sand). The Gb number the machine settles on will tell you (generally speaking) what type of soil you have in your area. There is a good chart in the F75 manual that coveres this well(both for the Gb setting and FE304 reading), and when you get the machine you should have a peek at it.
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Streak!
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Thomas Dankowski Metal Detecting Forum
if memory serves me, tecting around where you live is pretty much the same as the ground conditions here, cept at the field at the mad farmers (Ians) where all those romans had that iron encrustation! Wasnt that field flooded for many many years??
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Streak!
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Thomas Dankowski Metal Detecting Forum
turns out there is actually a paper and procedure on Recovery of Fe fraction from coal fly ash by using a high gradient magnetic separator. Seems the Fe content of coal ash is high enough warrant research and recovery! Its no wonder then that coal slag/cinders are magnetic. I'll have to do a bit of testing on that here when time permits. Heck, I BURN coal to heat my house...so I have no sho
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Streak!
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Thomas Dankowski Metal Detecting Forum
It looks like marks site has coal burning residue, which is pretty common on some sites in these parts.(ESPECIALLY old school houses) I encounter it from time to time. They have what looks like cinders, and those cinders WILL affect detection. Now, If this IS just cinders/coal slag, what is it about them that make them magnetic?? Coke will drive machines nuts, and I suspect that these tiny cinde
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Streak!
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Thomas Dankowski Metal Detecting Forum
that gives the relative values for the FE304 meter. It ranges from blank to 3. 3 is HOT HOT HOT, and 0 is pretty much the absence of mineralization.
the increments go in multiples of three. In other works any particular reading is three times what the one below it is. In the area around cupleper Va, the FE304 reading varies from .1 to 1, with the RARE 3. The thing to remember when evaluating yo
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Streak!
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Thomas Dankowski Metal Detecting Forum
thats in contrast to every other machine of mine that positively like wetter soils.
A summer or two ago we had a REAL dry summer, and you could dig to a foot and a half and it would be as dry as powder. The F75 STILL seemed sensitive to deep low conductors, and I seemed to dig just as much as I did when the soil was damp. In fact, the F75 was a little more predictable and stable.(but just as de
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Streak!
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Thomas Dankowski Metal Detecting Forum
The V3 uses a 32 bit processor running at over 100Mhz, (WAAAAAAY faster than most machines out there today) but that doesnt necessarily equate to fast recovery/response speed. I'm betting that all that processing power is needed just for the display/ analyze screens. I'd love to see a good side by side with the V3 and F75, in a real life sceneario, but till someone that owns a F75 buys
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Streak!
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Thomas Dankowski Metal Detecting Forum
If it were as easy as "believing" the meter, then detecting would take NO skill at all. While there is a LOT of value in the Beep/Dig method (NO vdi meter...just dig what sounds good), having a meter had its value too, even if its not on the money very often. WAY too many variables in the soil....with co-located targets..and in the angle the target sits in the ground to rely much on the
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Streak!
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Thomas Dankowski Metal Detecting Forum
suffice it to say, neither the Tejon or X5 are even in the same league as the F75 when it comes to separation, and/or unmasking.
I used the X5 for YEARS....and its not even close.(and the X5 is a more versatile machine than the Tejon) I THOUGHT the X5 was fast and separated well, TILL I got the F75. Never looked back.......... Streak!
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Streak!
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Thomas Dankowski Metal Detecting Forum
The reason I ask it that there is a measurable difference in depth and target response HERE between PF and DE modes, at least if you can believe my test garden results. In my woods sites I see no real difference, but the targets are relatively shallow in "most" of my woods sites. In the huge fields that I hunt, you can see a marked difference in depth between PF and DE.(A bit crisper au
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Streak!
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Thomas Dankowski Metal Detecting Forum
AND usually have the sens at max, or as near max as the site will allow. Tests in my haunts show definatively that disc setting below 6 (as close to 0 as possible), unmask a LOT more targets. I hunt pretty much by audio alone in My sites, and use the TID for an educated "guess"...nothing more. Relying on the TID is wayyyy to iffy in Fe infested sites, as it(co-located iron) affects the
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Streak!
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Thomas Dankowski Metal Detecting Forum
I loved because it was both realistic AND HONEST!!
there are those out there that no matter what kind of handstands the detector designer/manufacturers do....they will remain unsatisfied, and I've come to discover that those guys (whom are relatively few in numbers)are usually the least skilled detectorists.
I USED to detect with a guy that HAD to have the latest and greatest. He was of
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Streak!
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Thomas Dankowski Metal Detecting Forum
1. IF a DE (design engineer) ..... thru the course of time..... comes up with a tiny/minor concept/invention for an already existing detector..... Should he incorporate it into the production line?
Yes............. I'm all for evolution of an already existing line, as long as it isnt earth shattering.
2. Or should he 'hold' that concept/invention in reserve...........let mo
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Streak!
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Thomas Dankowski Metal Detecting Forum
Re: CZ 8 inch coil covers...
Posted by: NASA-Tom (IP Logged)
Date: July 07, 2008 09:57PM
Coil cover = 1/8" thick.
PLUS
Very small air-gap between coil cover and coil = 1/8"
1/8" + 1/8" = 1/4".
Loss of 1/4" depth.... PLUS..... add salts/bad dirt/minerals ... sloshing around in that air-gap. Hmmmmm ,,,, I'd rather replace a coil every decad
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Streak!
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Thomas Dankowski Metal Detecting Forum
I've detected for over 35 years now, and have had dozens of machines, and I'm a scrubber, but I've NEVER even come close to wearing a coil out from abrasive wear, BUT......I DONT slam it into rocks or beat it to death. with a little attention paid to how you treat your coil, coil covers arent worth the trouble, and dont help much at all. covers are by nature softer and more fragile
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Streak!
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Thomas Dankowski Metal Detecting Forum
I've been adding to it and modifying it for close to 15 years bow (the same amount of time I've lived here). My advice (for what its worth) is to try to make YOUR garden as much like your hunting conditions as possible. That includes the type of targets. I have a plethora of coin type targets at various depths...... and things like CW artillery fragments, small two piece cuff buttons...
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Streak!
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Thomas Dankowski Metal Detecting Forum
I looks to me like your trying to compare two different things.
The "boost" you get below 6 and above 20, and the sensitivity settings themselves. Two very different things. I dont think there is really any difference in older and newer machines, other than the wording in the manual.
Plainly put, fisher says the they consider a sens setting below 19 "low" gain and anything
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Streak!
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Thomas Dankowski Metal Detecting Forum
over around appamattox the dirts fairly hot, mostly on the high spots. some places its REAL bad, but most are what I would call "fairly hot". I hunt the red stuff around Culpeper too.....and thats the hottest stuff I'VE ever hunted. Pulses rule there. VLF's suffer greatly, and that includes Minelabs.
I'd say where you are going, there WILL be hot spots, but woods and lo
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Streak!
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Thomas Dankowski Metal Detecting Forum
The guy that found it (the purse) is a GREAT guy,(Rob) and very deserving of a nice find like that. He bent over backward to try and preserve the history of the find, and in the beginning didnt even want to take the coins out, but had to to preserve the leather.
funny thing was, this site had been hit pretty hard over the years, and it took a bit of luck, and persistant and investigative diggin
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Streak!
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Thomas Dankowski Metal Detecting Forum
Hi Mart - 15 years ago
I have two F75's....and a total of 4 of the 11" coils. Bumping the coil against anything (or even tapping it) WILL preduce a false...(every time).....so I think its SAFE to assume this is normal. My 75's have done this for the entire duration of ownership by me.(And I've experienced it on a few other detectors and certain coils) While I DO scrub my coil, I try to avoid actuall
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Streak!
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Thomas Dankowski Metal Detecting Forum
and while I cant quantify the EXACT amount of separation gained with the DD over the concentric, I CAN tell you its significant.
A best guess based on "in the field" performance would be......that the 5" DD has 75- 80% of the concentrics depth, but offers a 4 fold increase on separation qualities. ID's seem to be within one number of the stock 11" as well.
I have both
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Streak!
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Thomas Dankowski Metal Detecting Forum