Anyone Notice the MXT 300 is not quite as deep as a

[Keith Southern]

regular MXT when comparing coil for coil?Ive been noticing in my testing that the regular MXT seems hotter out of the box than compared to the 300.I wonder if they dialed the transmit power back a little on the 300 to keep the big coil stable.I see about a 2 inch difference between the 2 machines coil size being the same.I now a coil is tuned to the machine when its on the assembly line on initial start up. They might be detuning them to stabilize without noticing they are actually doing it to actually get the machine inside the parameters? Just wondering if anyone else notice's this. Ive tested 4 300's and 4 regulars.

Thanks

Keith Southern

 

[Rob (IL)]

I think the only way to get that answer would be from someone like Carl @ Whites. I don't believe there is any difference between the two detectors. You didn't say what coil you had on the MXT to compare compare the detectors. I think the difference would be in the coils and how they are effective in your type of ground. I don't think tuning the detector to a coil requires turning back the transmit power. Several of the guys who are very experienced and knowledgeable run the 300. I don't think they would if they had to give up depth. By the way what is the mineralization of your ground or at least your location? I don't mean the ground phase reading. Rob

 

[Keith Southern]

I am talking about just pulling them out of the box and testing the same coil 950 on all of them the regular mxt's seem hotter not by much but a couple of inches in air test ground balance locked sensitivity wide open? maybe its just coincidence ? who knows? they might do opposite in the ground ? again who knows? just thought it was interesting and would ask to see if any one was in the know.thanks rcasio44

Keith

 

[BarberBill]

I think you'd see minor differences from one machine to another if you tested a bunch, but I'm thinking they'd mostly just be differences you'd expect with most being within expected tolerances and MAYBE one every so often that stand out one way or the other.
HH
BB

 

[Horsesoldier]

Not all machines are created equal. You can have two machines of the same make and model and one can be hotter than the other. Can't explain it, that's just how it is. If you work the math based on a coil size the 12" coil is approximately 20% larger than the 9.5 which means it should cover 20% more ground per sweep. It may or may not increase depth due to the fact that you may have to turn down your gain to maintain stability because you've basically just put a larger "antenna" on your receiver.

 

[BarberBill]

Well put Horsesoldier. Also, I remember a radio man (when we still had small independent radio and tv shops) comment that some transisitor radios of the same model just seemed to work better due to containing components that were a bit above the average. I would think that same principle would apply to detector circuits as well.
HH
BB

 

[Monte]

As some have stated, I haven't really noticed anything that would be out of the norm due to slight variances in components. Actually, I've found most White's models to have less unit-to-unit difference than most of their competitors.

Anyone Notice the MXT 300 is not quite as deep as a regular MXT when comparing coil for coil?

When comparing two similar models you have to ensure they are using the same battery power level, ground balanced over the same spot and compared in the same conditions, AND use the very same search coil. THE same coil switched from one unit to the other.

Ive been noticing in my testing that the regular MXT seems hotter out of the box than compared to the 300. I wonder if they dialed the transmit power back a little on the 300 to keep the big coil stable.I see about a 2 inch difference between the 2 machines coil size being the same.

An MXT is an MXT, regular or "300" and it's just a different finish and included search coil.

I now a coil is tuned to the machine when its on the assembly line on initial start up. They might be detuning them to stabilize without noticing they are actually doing it to actually get the machine inside the parameters?

With some makes and models, a specific coil isn't tuned to a detector during assembly, but instead the detector is tuned for the coil. These are basically the turn-on-and-go models with an internal trimmer for Ground Balance and manufacturers used to do that all the time. Many now use electronics and adjust the trimmers by a scope and/or meter and then put a coil in the box. Some manufacturers don't check them before shipping which is why a certain brand or two seem to have a lot of problems throughout the years with poor performance right out of the box. This isn't the way White's does it.

Just wondering if anyone else notice's this. Ive tested 4 300's and 4 regulars.

Keith, this is really no different than all the talk we read sometimes from folks who say they get better depth from the Relic mode or the Coin & Jewelry mode, or that one seems "noisier" than the other. I've had an MXT or two that had more spits and sputters from the C & J mode than Relic, and others that were noisier in Relic.

I can honestly say, however, that as long as I was running an MXT with a similar or same coil against another and everything was set the same (same level of 'noise" for example, the differences I have seen have been very, very slight. I attribute it more to a search coil issue than the detector.

Monte

 

[B.T]

Only diff I ever noticed between the two was the 300 I compared to my standard MXT had a slightly lower tone in Prospecting mode than mine did. Their depth was identical.
I did like the lower tone and considered trading over but in the end didnt bother to.