Show all posts by user
This Open Forum is now DISABLE to new posts due to the "Phorum" Forum Software being generally obsolete and basically no longer supported. Recently, the server that hosts this website upgraded to MySQL version 8.0.36 and Phorum 5.2.23 is not compatible with MySQL version 8.0.36. This Phorum base Discussion Forum will still be available for viewing and reference but is longer accept new postings and will be READ ONLY. To visit the NEW forum, CLICK HERE! Please note that those wishing to use the NEW Discussion Forum will have to re-sign up. Due to encryption of passwords, I cannot transfer users from the Phorum platform to the new forum platform. I am sorry for all the inconveniences.
This forum is currently read only. You can not log in or make any changes. This is a temporary situation.
Results 1621 - 1650 of 1917
There's a system (single and triple freq options I recall) we have here in the U.K, made by Highland Innovations, they use 834MHz (or similar) FM frequencies, (intended for cordless microphone systems).
Here's a link:
If you don't mind hacking, in order to fit your own phones, a popular (in the U.K) cheap 2.4GHz system is the Technet Rapoo setup.
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
By careful design, it's possible to get a coil to have an induction balance null over a wide frequency range. I'm not sure what coil characteristics are important, I think capacitive coupling from TX to RX coil may be the tricky bit, as it will vary with frequency. Then all you have to do is tune the coil(s) up with the appropriate tank capacitor, and it will work at whatever freq. you
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
Quote:"To think if ..... the 'need' for a small coil is no longer relevant."
...or alternatively, if the need for a large coil was no longer relevant - if a lightweight 6 or 7 inch coil could do the job of a 10 inch one.
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
Try making a special coil-mounting bracket so the coil sits at 90 degrees to the norm. Then hold it out in front of you like normal when you go for your walk.
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
Transmitter 'power' is constant on the F75, as it is on just about every detector on the market. The XP Deus is a noteable exception, variable transmitter power allows it to have longer run-times from a modest-size rechargeable battery.
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
I like the idea of a computerised record of finds, findspot, etc, and have been tentatively trying to sort out something similar myself. This has brought up the subject of "how good do photos need to be?" The requirements for printing out pictures are different and more demanding than those intended for on-screen viewing. How good your photos need to be for printing can be found from th
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
Your 6300 will focus as close as 4 inches (100mm) according to a bit of internet research. This seems perfectly reasonable. It does seem to have a selection of exotic focusing modes, maybe you should try some of the simplest ones, like single-point (middle of the screen only), in case it's focusing on the background more than the coin. This is where keeping the camera away from the subject t
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
The Italian link was just for info. The original boxy style Sherlocks/scanmasters are probably discontinued, as the CS209 is obsolete. There is a very similar chip available now, the TDA0161. I don't know if the Mark2 version uses this new part.
I would be surprised if you could not find a US dealer, they may be sold with a different name.
A bit more Googling shows there are two different
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
It's a Sherlock DTS-Pro, also sold as a Scanmaster, and virtually identical to one called the Merlin SXL. They are based on the Cherry CS209 'metal detector chip'. I admit it has been the subject of some significant experimentation, but even as standard it was pretty good on tiny stuff. As an example, a 0.22" airgun pellet: Garrett range is 5mm, Sherlock does 21mm standard (an
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
Sounds like you need a high-frequency pinpointer, if you haven't already. My 65KHz pp will comprehensively outdo my Garrett propointer on tiny, difficult targets. Do Tesoro still make that nugget-shooting pinpointer?
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
Quote:"I am going to learn how to take good, clear Macro pics with this little camera"
Kevin, there have been numerous photo-taking threads on the UK forum I use (I won't link to them, as you would need to be a signed in member to see many of the pictures). But the key thing is to understand how large your camera's photo's are, and what a comparatively small size you nee
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
Quote:"why aren't the knowledgeable types looking to Mod/Super Charge the AT Pro?"
It's new, so not many folks are willing to invalidate the warranty. Give it a couple more years, they might.
It's waterproof case makes it harder to work on.
Like all modern machines, the electronics is very small surface mount, not easy to reverse-engineer, modify, probe, or add bits to
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
Quote:"you might as well place a silver coin in a side-hole at 14 inches"
This was intended to be one of Gary's tests - a 92% silver sixpence (a close dime equivalent) at 10 inches. But it seems no machine gave a worthwhile signal, so the test was abandoned, and it doesn't get mentioned anymore.
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
Quote:"Why is it not possible to have independent volume controls on 3 and 4 tone machines? To be able to lower the volume on the iron and pulltab range and allow the top two tones to remain loud would be a great way to discriminate out targets"
Wouldn't you just want tone-break audio? Disc'ed out metals give an adjustable iron-tone, non-disc'ed give the appropriate tone
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
Gary's hoard test was 'replicated' by Carl Moreland on his Geotech1 website. Virtually nothing detected it:
Making it 2 to 4 inches shallower is likely to bring it into the range of more detectors.
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
One thing you could look for whilst it's in bits - is there a resistor inline with the headphone socket? I presume it has an internal speaker? (not familiar with them) - it could be on the PCB, in which case it's not going to be obvious, I was trying to find out the resistance of the output drive to the phones. It's usually about 200 Ohms. This resistance is what determines my capa
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
There's a thread on Geotech1 about improving the 1266. I seem to recall changing the filtering of the ground channel was the interesting mod.
Here it is:
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
That's what I was thinking they did, but something about connor's experiments with the Auvio cordless setup made me wonder if it may be different.
Looks like he may now have some success.
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
Maybe the audio out of the detector is between the tip and middle-ring, and ground is unused. In which case:
1 : connect tip of 'phones to tip of 'tector output, and connect middle ring of 'phones to middle-ring of 'tector output. No ground connections. Does this seem to work like normal? If so, then...
2 : Insert the 4.7 micro cap between tip and tip. Does it still sound no
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
Oh boy, I knew this was going to be a transatlantic pain. I've just looked back through the thread, and seen that I didn't actually tell you what I wanted you to do, because I was waiting for you to get the plugs/sockets etc first.
The capacitor has to go in series with the headphones. Connect the ground of the 'phones to the ground of the detector output. Connect the tip and midd
by
Pimento
-
Thomas Dankowski Metal Detecting Forum
I can't think why the sound would be muffled, the exact opposite is what I would expect. So you have the stereo plug and socket and made the break-in cable?
by
Pimento
-
Thomas Dankowski Metal Detecting Forum