I have had my F-75 about 18 months and have yet to drain the very first set of batteries I put in it down a hair. If I turned it on right now, the batteries show full. Some of you may recall my posts a while back with me moaning about my F-75. Well, I had a pretty severe eye opener the other day. My F-75 had a short in the headphone jack, and I sent it in to First Texas and they replaced my coil, did the upgrade, replaced the 5 pin and put on a new head phone jack. I benched tested it and was blown away by both it's speed and "air depth". The very first time I took it out after it was "fixed" this spring, twice while trying to locate targets, they disappeared on me. They were extremely clean, solid signals that literally disappeared during recovery. I tried running my SR probe across my knife and the machine couldn't pick that up either. So thinking I still had an audio short I called Felix and he sent me a call tag. Which I never got around to sending it in. Well, 2 weeks ago I went to my dealers to pick up my new ETrac and took my F-75 with me so he could check it out. We are on his front lawn and I plug in my SR Pro Gold headphones into the F-75 and we can't get any sound out of them, whatsoever. The guy who was with us tried his SR Pro Golds and they worked perfectly so my dealer hands me back the detector and we come to the conclusion that my headphones need repair, not the detector. I spend the next week and a half trying to learn my ETrac. My purpose for buying the F-75 was for the quicker response as I have some sites that are old and have very dense iron with lots of coins masked to my SE's. I have hit these sites with my SE in drought, damp, wet, and saturated times. At all times of day and night from different directions with every possible setting on the SE and with all 15 or so of my coils. When Mine Lab came out with the ETrac, I got really excited, I am thinking a faster Explorer that deals with mineralisation better. If so, I haven't seen it yet, let's put it that way. Well, here I am at this site last Thursday and it is raining, I don't have a rain cover for my ETrac so I decide not to use it and instead I grab my F-75 and put the 3x5 coil on it. Now I didn't use head phones because I had already established my SR headphones didn't work with it. So I turn it on, ground balance and off I go. Now before I tell you what happened, I could hunt for days on end with my SE at this site and get maybe four targets in a 5 to 6 hour hunt, using manual sens maxed to barely stable, audio long, fast on, and all metal, and using my smallest coils, the SR5, EX 4.5x7 and EX 6. My ETrac with it's "See Through" technology literally nulled out for 45-60 seconds at a time, this is some dense flat nails I am hunting in. Well back to the F-75: DE mode, the Sens I was able to go up to 94 with that tiny coil, the (3x5), disc 6, 4h tones. In less than an hour, I dug 11 Indian Heads and two buttons, one of which, at 6.5 inches and I am pretty sure is a civil war coat button (an Eagle and the word "Union" on it with stars), a watch fob old, late 1800's, and like six other relics and a bunch of tin and lead, oh, and a lead 3 ringer bullet too.
This 100 square foot area that I had pounded the snot out of with both Explorers, the ETrac for about 4 hunts and the SE for 2 years and here I am finding one after the other with the F-75! I had to stay under the trees as the rain picked up and then it got to be to much and I had to quit. The following day I used my ETrac and found 1 Indian at 3 or 4 inches after 4 hours
Then I thought why in the heck am I trying with this thing so hard, I should just use the F-75, after all, I came here to dig up coins, what difference is it if I don't master my ETrac today? So I grabbed the F-75 and plugged my Rat head phones into it, after all they were not my non working SR's, then I couldn't get a sound out of them, and yes, I turned the plug around for stereo. So I take the head phones out only to find that now no sound comes out of the F-75's speaker either. So basically, I have a intermittent short in my head phone jack that can also take out my speaker completely or in and out partially which is what my disappearing, non repeating targets have always been....short, squished, chopped off signals, a flipping electrical short....BUT at least I know this machine's capabilities when it is working correctly and I am now very much looking forward to having it repaired and pulling another 1000 coins out of these sites that I can not hear with my Explorers and will now be able to hear with my F-75, finally. Sorry so long, but that was 18 months in 3 minutes.
This 100 square foot area that I had pounded the snot out of with both Explorers, the ETrac for about 4 hunts and the SE for 2 years and here I am finding one after the other with the F-75! I had to stay under the trees as the rain picked up and then it got to be to much and I had to quit. The following day I used my ETrac and found 1 Indian at 3 or 4 inches after 4 hours Then I thought why in the heck am I trying with this thing so hard, I should just use the F-75, after all, I came here to dig up coins, what difference is it if I don't master my ETrac today? So I grabbed the F-75 and plugged my Rat head phones into it, after all they were not my non working SR's, then I couldn't get a sound out of them, and yes, I turned the plug around for stereo. So I take the head phones out only to find that now no sound comes out of the F-75's speaker either. So basically, I have a intermittent short in my head phone jack that can also take out my speaker completely or in and out partially which is what my disappearing, non repeating targets have always been....short, squished, chopped off signals, a flipping electrical short....BUT at least I know this machine's capabilities when it is working correctly and I am now very much looking forward to having it repaired and pulling another 1000 coins out of these sites that I can not hear with my Explorers and will now be able to hear with my F-75, finally. Sorry so long, but that was 18 months in 3 minutes.
Good thing the wife don't take batteries. Oh, wait a minute.......Then I could remove them
You are havin a laugh arn`t you ? The F75 has the quickest response speed of any detector out there . even quicker than the notoriously quick, French, XP Goldmaxx power. 
In all fairness the E trac has its excellent points ,and i will not be parting with iether. I`ve had the F75 since it first came out, and nothing so far has persauded me to part with it. Its a cracking detector.