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The Blisstool and CF-77 are VLF analog machines without a VDI. They are audio only. The CF-77 has a higher frequency and an iron audio adjustment. Blisstool is a very low frequency machine and single tone. Blisstool has more adjustments and ability to control the discrimination ie: trim out iron and minerals from the signal where the CF-77 has just 2 modes: all metal, discrimination 1 and discrimination 2 which are fixed settings.

Those look like 2 box machines. VLF's for deeper larger objects, don't think they will detect a single coin.

Kruzer and Amphibio family machines use the same coils, external battery option, and headphones. Only difference between the Kruzer and Multi Kruzer should be the MK has selectable frequencies. If there are differences then it might be due to a software update difference. In trouble areas I find it easier to access the frequency rather than the frequency shift. I tend to get lazy and if it means I may lose less than an inch in depth I can deal with that. So far even in air tests I can barely tell the difference in depth with the different frequencies. I do suspect the 5khz on the beach in beach mode would make much more of a difference than land or fresh water hunting.

Ya I saw that. My first post was with the stock concentric and had trouble recording the audio as it was clipping out on me. This was done with the 10x12 widescan. Did forget to mention my swings over coil where right to left to right (rx to tx then back to rx). You can see how the machine has a different read on either side of the coil, guessing they boost the tx (high output transmitter HOT). I wish it did have a gain control. I'll be running the machine as sensitive as I can instead of the usual 7-10.

Update on this subject. I did a new recording and it seems sensitivity really doesn't effect depth but rather a bit of detail to the audio itself. It also seems to have stereo output, might explain my last couple hunts I had set my headphones to mono and had some trouble telling targets apart. Thought I just lost my touch. The Tejon seems to have a fixed gain. With that in mind I set the machine to 10 sensitivity on lowest disc. and recorded the following targets. medium gold ring, us nickel, square tab, large platinum ring, pull tab, copper penny, silver ring, clad dime, clad quarter, silver half dollar. Targets passed over the coil at approx 6" away and approx same speed.

Pouch here or just carry it in the same hand as my digger. At the beach I don't bother with a pp, sand scoop is enough.

For larger coils I find in areas with more minerals and iron the more counter productive they are. In mild dirt you do gain more depth. As a comparison in Air test the Nel Big 17W X 15L goes approx 50% deeper than the stock 8 1/2W X 11L dd on my AT Pro. In the field and actual use with all the hours I swung the Nel Big I only found 2 silver dimes @ 14" in mild mud. In other grounds where there is a lot of iron like my back yard I could barely hear a dime at 9" with that big coil. My point being the coil can hurt a machine no matter how good or bad it is. Really have to find that balance. I'm dying to take my MK to the beach and see how it does, that skinny stock coil really impresses me in bad grounds and emi areas. Still don't know why they don't make an elliptical coils for the Nox or even a small concentric?

Chatter on the Simplex might be the mineralization, did you try to nudge up the discrimination? I have the Multi Kruzer and can trim that out and get the machine to run nice and quiet even in some of the most horrid conditions. Had it in the river which is tidal yesterday, found a paper thin Indian Head penny about 8-10" down in hard pack gravel with tons of iron. My buddy had difficulties ground balancing his Nox 800 in the same area, not because it is MF vs SF but because those large round coils can be difficult in some areas. I found the MK to be a very high gain machine in general, running it at 3/4 the sensitivity tames it down but nice to have power under the hood. I think most people run them just too high making them sparky with irradic id #'s as they are very sensitive machines. You may want to check out the eliptical coil for the Simplex, Sven did some testing on them. The Apex looks to be a very tame smooth running MF machine. Being splash proof puts it ahead of the Vanquish but probably not a Nox 800 killer. The eliptical dd looks like it will be pretty universal, be nice to see what other coils come out for it. I have found the Garrett machines to be very tame except the AT Max which is chattery. From the little bits I have seen on the Apex it appears to be as stable as the AT Pro but with MF so id #'s are probably much more accurate. Note there is only 1 coil for the Apex right now. Apex only runs at 5, 10, 15, 20khz. Nox 800 going upto 40khz can be used for tiny gold ie gold prospecting. Apex should work very well with those key frequencies for the majority of detecting. Salt water hunting, lower frequencies do better.

A PI machine might be an issue if you have a lot of trash objects. There are other deep vlf machines such as Blisstool and simple ones like the Nokta Coinfinder CF77 but neither of those have a display on target so they take a bit more learning on what is a good target and bad target. Depth difference with those machines can be marginal depending on ground conditions such as mineralization. Bottom line your splitting hairs when looking at the bigger picture of overall depth. There is another machine you may want to check is the Garrett ATX.

How does the GMX handle in the wet? Do you lose a lot of depth with a high frequency compared to say 5-15khz machine?

Ohhh Shiny!

Sounds like a faulty coil, you could check the coil wire for chew marks, crickets are notorious for decimating the shielding on wires 🙂

Like I said a bazillion times. It works very stable with the lithium rechargeables because the voltage doesn't drop off as quickly as the alkalines do. It really needs full voltage to operate good. Other pp's aren't as voltage tolerant it seems.

LOL could fleabay it and snag a carrot hahah. The lithum 9v's do work really good on it and the Profind 35 I think is the only one with iron sensing.

Welcome to the forums. If the soil is mild any machine will do. I have a Makro Multi Kruzer that does very well with silver in particular even at 19khz. Nox 800 is also a great machine as many here use them. There are more coil options for the Nokta machines which may prove useful depending the area your searching.

Looks like very similar numbers to the Pro and Max.

Not sure how Craigslist would work out on something like that, always seems shady to me but I tend to be skeptical about those things.

That is a good haul/workout.

Welcome to the forums!

Think it was all read out of context, just wanted to bring that up. Thanks

Any initials to try to track down? Be very vague with your description when posting.

I think 2Valen's message was to help you in the scenario if someone approaches you and said I lost something and you blindly show the find you got in the area without them confirming or describing what they actually lost with some detail in the first place. He didn't say you did anything wrong, just a suggestion from what I gather. Is it the heatwave making everyone so hostile these days?

Well done. I found quite a few coins hidden in iron same way. If you have a machine with all metal mode just watch your numbers. Iron with a spike above iron except those exceptionally off the chart spikes are worthy of digging. Big spikes usually turn out to be flat iron. In disc mode I will hit all coin sized targets that sound like iron in different directions to make sure they are just iron. If there are big objects like sheet metal it might be worth while to pull them and go over the grounds again. Betting there are more targets there.

GhostLands is in Europe, might explain the odd looking coins 😉

Contact Amazon, if you have Prime you should be able to get a refunt or replacement.