richbat said:
Been doing alot of research on different types of MD'S, can't really afford the newer machines so i been looking at some older ones.
I have owned and/or used most of the newer models, from most manufacturers and, in
my opinions, some are good, some are so-so, and some I just don't like.
While there are some very good currently-produced models that can suit most typical hobbyists just fine, I am a bit more demanding for the types of site and hunting I do. For
me, I have some very preferred discontinued models that I own and use, and there's one I am still looking for. Just use some caution because at a point you can get into models that are simple 'too old' to have some better performance for modern-day challenges. There's nothing wrong with shopping for a used detector that works well, but I wouldn't shop for 'cheap' or 'inferior' models just due to their price.
richbat said:
I had a couple of whites years ago Prizm, think one was called the Classic ID and a 4900/DL Max loved that machine,found my first gold ring with that one.
Briefly, of the three you mentioned, there are quite a few differences. The Prizm series (with the exception of the Prizm 6T which is a totally different detector) and now the current Coinmaster models, have separate GB trimmers for the All Metal mode and Discriminate mode. I have handled so where one mode was too negative, or the other mode was GB'ed too negative, or both modes were set too negative, and when too negative you can, and will, experience some falsing issues, especially in the motion Disc. mode.
All of the Prizm and Coinmaster series (current Coinmaster's) also have a delayed response time (except for the 6T) so when hunting in the motion Discriminate mode you don't get an audio response from a located target until well after the search coil s past the target. That can be annoying in general, but frustrating as well when hunting in trashier sites. These models also offer only an accept/reject segment type of Discrimination and the other two provide a very nice variable Discriminate control for a more precise setting to accommodate the site challenges.
The 4900 /DL Max was a good model for its day, but by comparison it suffered from not allowing a slow-motion sweep or a quick-response and fast-recovery due to the 4-filter type of operation. It required a faster sweep speed, and it also lacked any visual TID. It is quite 'old', but today's standards, and it is very difficult to find the proper search coils for it. It might have been used to find your first gold ring, but I found my first Indian Head 1