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F-75 Video

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Daniel Tn

Active member
I just uploaded a pretty good video for you F-75 guys on YouTube. It is processing it right now...was 26 MB on my computer so I have no idea how they will compress it down or when it will be available to view.

But basically it is going to cover the F-75 in my infamous "bullet hill" site with the bad dirt. It is the place we've had all those machines in that have so much trouble. You guys will see first hand how a bullet sounds in bad dirt and what you're missing out on in the world of DISC mode. I do a real world showing of that with all metal vs disc on the same targets. I hope you guys and gals enjoy.

My name there is "tnbackroads" and the video will be something like F-75 Tips & Civil War Relics.

This will be my first YouTube video. I tried uploading some the other day but they were in fragments...this is the whole thing.
 
I subscribed to your video's keep em coming. Hummn.. You are right I do jump over alot of targets in Disc mode. I am gonna run in All metal mode for awhile and see how I can do in that mode. Those low numbers will fool you looks like. I like your video's make some more and share some more of your tips. And as far as the dot on the coil goes. Good idea..I ain't gonna copy you..Copy would be to use red..I am gonna use white.. :)
 
Great video Daniel, I like that you took one tip and explained it very clearly. Keep them F75 tips coming:thumbup:
Glenn
 
Great video Daniel !!
Do you test the same presets but in discriminate about 4 ?? :confused:
Tone ID was also 'bad' ??
 
I have made a lot of youtube videos on the F75 and now the F5. I did like your video for the facts you showed. If the sights I hunt were not so full of trash I would hunt AM more often. What happens if you hunt at a dics of say 0 but are in tone mood? Have you tired this info that Nasa Tom uses?

I know that I answered this in several threads and in several posts below......... but let me see if I can say it a little bit differently.

Say; you have a silver dime and a nail at a handful of inches deep. The two targets are close enough to each other.... and laying in such a fashion so as to give you a VDI ID of...say; '13'. Let's say your F-75 Discrimination is on a setting of '6'.

1. If you are in '1' tone (monotone).... the F-75 will give you a good audio response to the target. (((You will most probably recover the target))).

2. Say the F-75 is in 2-tone (or 3, 3H, 4, 4H tone options etc.....). Now......... the F-75 will respond with a audio response that most detectorists will NOT dig/recover. The F-75 will report a 'iron' tone (the lowest sounding audio tone). The non-ferrous silver target will most likely NOT be recovered....... even though most all nails will discriminate out at a Disc setting of '6'.

THIS IS BECAUSE; When 2-tone (or 3, 3H, 4, 4H etc.....) is selected = ANY target that results in a VDI ID reading of '15' or below....will report as a 'iron' low-tone. Most folks will NOT recover iron tones.
I have explained this many times.... in many posts below; Sooooooooooo ,,, if my explanation is not clear enough here.... I may have done a better job in posts below.


NOW.......... that being said. (((( If you are in a nail infested area, and you do not audibly fatigue easily = = = )))) IF, IF, IF, you can handle a lot of noise.... and the detector can handle (not EMI plagued) a Disc setting of '0' and a Sens setting of '99'....then hunt in 2, 3, 4 tones (your choice),,, hunting for the "deepies". YES.....the detector will mask some targets in this audio selection config (ie 2, 3, 4 tones are selected) because any (heavily masked) target that VDI ID's as a '15' or below will present a 'iron' audio response (as so stated in example above),,,,, BUT, BUT, BUT the trade-off is; the F-75 will go deeper just by virtue of the Disc setting being '4' or below (especially '0').

Soooooooo, I am saying (by this set-up config) = MORE MASKING, BUT GREATER DEPTH. Hmmmmmmmm... trade-off. Which one does better? Disc '6' & monotone???? or Disc '0' and multi-tone???? The answer is: They BOTH do!!!!!!!!!
I am saying; HUNT the area in Disc '6' & monotone...... and do all the 'unmasking' that you can. THEN hunt in Disc '0' and a tone-option of your choice.... going for all the deepies.
NO...... you can not have both at the same time.... (((unless you're really good!!!))).

* 99% of EMI enters thru the coil. ((( Control box is not shielded....but is usually not the 'cause' ))) Dave J. & John G. are well-aware of the EMI issues, and understand the magnitude, the level of difficulties to mitigate this inherent single freq .... high powered unit's issue. And in the F-75's design..... there is minimum component-to-component 'cross-talk'.

* You have NO idea how difficult it is to design a 'functioning' detector. There are THOUSANDS of issues to deal with.... most interact/play AGAINST each other. There are MANY things we do not think of..... MANY things we are COMPLETELY unaware of.... that are 'exposed' in the design phase; MANY things rear it's ugly head! How do you know what you are missing...... if you don't know it even exists!!! Why would a rusty nail ID as a '4' at just a few inches..... yet.... STILL ID as a '4' at MUCH GREATER depths!!! And how DO you reduce internal component cross-talk!!! Which specific components are 'show-stoppers'!!! And just exactly what SPECIFIC.... and how MUCH shield paint must be applied to the coil !!! What are the thermal characteristiscs of each electronic component.... and how solid/stable/repeatable/reliable is each component as they change throughout operating temp changes!!! What material should be used for the face-plate film so as to mitigate UV breakdown!!! Pistol-grip foam density..... coil wire gauge so as to provide proper impedence; yet NOT change impedence AND NOT BREAK whilst donning/doffing coil thousands of times. THE LIST IS MILES LONG!
It's not easy guys..... it's not easy! The CZ took over 4 years in design... and Dave Johnson was NOT ready for release/product roll-out.... but was hand-cuffed by corporate deadlines & finances.

I could only... AND CAN NEVER commend enough!!!!.... folks like Dave Johnson, John Gardenier, ..........Bruce Candy, George Payne, Kenny White, Charlie Garrett, Eric Foster, Jack Gifford and other DE's of the detectors we live by. We take it for granted... and DO NOT know it!
 
In conversing with Tom about the T2 we were both using with success in thick iron, he suggested using 1 tone & listening to the audio with T2 disc of 21, & I have not looked back since.......
Now with the F75 one can do the same thing with disc of 6 & 1 tone. There's alot of static, & can give a headache after while, but you just rely on the audio and good targets leap out.......I used 6 to get those buttons & the half dime I posted recently......
HH,
Bill
 
Hey,

You can get a similar result by going to 0 disc and 1 tone but believe it or not, I think motion all metal is actually a quieter mode than running disc mode like that. Around the RF lines and such, I've found for whatever reason, that the all metal motion is calmer. I have been in places where disc mode chattered and numbers went crazy on the screen and all metal was calm and stable. And I've also been in places where it was so bad neither mode was huntable. But also in disc mode you get a lot more "snap crackle pop" stuff in the sweeps. I think a lot of that has to do with our dirt being so bad with a high iron content anyway.

The disc modes will also compress the iron signals, so that something like a piece to a chain link might sound identicle to a shell fragment, cannister ball, or even an ax head. I have a really hard time "feeling out" the size of the iron in disc mode. In all metal I can get a feel for iron by its size and I can tell nails about 97% of the time by the double blips they give.
 
have a hard time getting used to the disc settings neccessary to hunt iron successfully with the new Fishers (and T2). Disc 21 on the T2 was the correct setting for knocking out all or most of the small iron that I setup other single tone detectors on. It was a natural and gave much better see-thru in iron over the 2F tones. Using the same disc setting of 21 the 2 tone mode gave an iron signal on many closely co-located nonferrous targets that gave a good tone in 1 tone PF.

One small thing different with the T2 (and possibly the F75) over other single tone detectors I have used is that around certain types of older decaying iron Disc 21 would false a lot more than I was accustomed too. Upping the disc to 22 usually solved the problem. I don't know how well the F75 would do in that case with its smaller iron disc range.

HH Tom
 
Bill,

Before reverting to disc 22 ground balance again to see it that helps with the falsing. If not, then go for it. I only hunted 2 sites where this was a problem and no matter how many times I ground balanced, disc 21 still slowed me way down with many false signals that had to be checked out by resweeping. I switched to 2F the first time I encountered this which was nice and quiet but then thought about just raising the disc 1 notch to 22.

HH Tom
 
Daniel like the video. Where in TN. are you hunting. I hunt in Franklin TN. and the surrounding area and I encounter the same problems. I find that the size and depth of the minnie balls also effect the readings. I use the same mode and sensitivety settings as you do. I find alot of williams cleaner type bullets and they usally read from the teens to the fiffty's if their 6" or deeper. If their shallower they'll jump from forty's to the fifty's. I found some of the larger one inch long bullets at 7" deep this week and they were reading as dime's. I think the lead has different impurity's also as old as it is. The area I've been hunting has alot clad and trash due to soccer field's. And has been hammered by detectorist over the years. But the f-75 is still the monster at finding those targets that everyone has missed. Like you said: Hunt in all metal and 90 sensitivety and really pay attention to your targets and I don't think anything will be left in the ground. As I always say keep on diggin!!!!
 
Hi Daniel, Thanks for that Video, really helpful to see other people using an F75, I'm going to try the all metal motion and will let you know how I get on. There is a lot I don't dig due to losing the signal or only getting a one way hit.. Maybe all metal motion will help me.. Cheers Paul
 
Great vid of the F75 running in the hot south soil. Coming from TN myself and moving to NYC. I have used with success the 75 in most detecting fields. From relic hunting down south, Park hunting in the big city as well as beach hunting in the salt. Setup and use correctly the 75 can take the place of several machines.
 
Daniel wear do i get your video???? Mic
 
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