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stabilizing the classics

T

thebeatmachine

Member
on White's classic models that have a boost mod, I find it useful to adjust the frequency control as a means to stabilize the unit. In an air test, crank the power up all the way in all metal mode. The tone will warble. if you adjust the frequency control you can at least slow down and come close to diminishing the warbles. You are tuning the frequency of the detector to resonate with the loop. This is a more stable detector, and a deeper detector. I found the sweet spot to be in the counter clockwise 7 O'clock position. Try it and let me know what you think.
 
[quote thebeatmachine]on White's classic models that have a boost mod, I find it useful to adjust the frequency control as a means to stabilize the unit. In an air test, crank the power up all the way in all metal mode. The tone will warble. if you adjust the frequency control you can at least slow down and come close to diminishing the warbles. You are tuning the frequency of the detector to resonate with the loop. This is a more stable detector, and a deeper detector. I found the sweet spot to be in the counter clockwise 7 O'clock position. Try it and let me know what you think.[/quote][size=medium]For those who don't know, the Frequency Shift is found on the Classic III SL, IDX and IDX Pro models.

If you only have the power boost mod on your Classic, then you're missing out on having total control of performance.

The problem with adjusting the Frequency Shift control is that it alters the Ground Balance setting. On an unmodified Classic, you might shift the GB to the point where you have a way too negative GB and then field performance is atrocious, especially in more mineralized ground.

If you do have a modified version with both the Threshold and Ground balance controls, then anytime you adjust the Frequency Shift you should immediately make necessary adjustments to restore a proper, functional Ground Balance setting!

If you're referring to "warbles" caused by nearby RF interference, you might b able to deal with it by adjusting the Frequency Shift, but you can also try adjusting the Sensitivity first.

Monte[/size]
 
Here's how it works on my modified Classic idx and classic 3: In discrimination mode turn it to below the ring setting. Crank up the sens ALL the way . Turn the threshold up ALL the way.
Now the detector should be some what un-stable. Now mess with the frequency control turn it all the way clockwise and very slowly turn it clock wise until the instability slows down. Now with everything as it is, do an air test on a dime. I can get 11 inches this way (in discrimination mode). adjust ground balance, hunt that deep silver!
 
[quote thebeatmachine]Here's how it works on my modified Classic idx and classic 3: In discrimination mode turn it to below the ring setting. Crank up the sens ALL the way . Turn the threshold up ALL the way.
Now the detector should be some what un-stable. Now mess with the frequency control turn it all the way clockwise and very slowly turn it clock wise until the instability slows down. Now with everything as it is, do an air test on a dime. I can get 11 inches this way (in discrimination mode). adjust ground balance, hunt that deep silver![/quote]
[size=medium]So, as I would understand it, you have a Classic IDX and Classic III with the modifications that give you manual GB and manual Threshold control, is that correct? You did mention the Threshold being turned ALL the way up, and that's not a good idea, generally. You didn't mention any ground balance adjustment. Also, you didn't mention if the Normal/Black Sand toggle was in the 'Normal' setting for the Discriminate level you used.

 
I am using the stock coil 950 and the toggle in the normal position. I get at least 12" (in air )on a dime in discrimination mode ( detector will not see iron) using this method. The detector balances to ground fine. the threshold to the max is a great way to add depth. If you are eliminating chatter, you are tuning the detector to the exact resonance of the coil.
 
[quote thebeatmachine]The detector balances to ground fine. the threshold to the max is a great way to add depth. If you are eliminating chatter, you are tuning the detector to the exact resonance of the coil.[/quote][size=medium]Hyper-tuning, the method of goosing up the Threshold for Disc. mode operation, does help saturate the audio a little on the Classic series, but, as I stated earlier, I don't think it's as noticeable improvement as hyper-tuning many Tesoro models.


I just don't like doing it because I use the All Metal mode too often.

Are you saying that your detector ground balances just fine AFTER you have adjusted the Frequency Shift, or when it is set at the factory preset marker?

If the GB was "just fine" AFTER you adjusted the Frequency Shift, then that would suggest that the GB was most likely very positive when the Freq. Shift was at the factory preset marker and that too-positive GB can impair your performance.

In the end if it works for you, that's what matters.

Monte[/size]
 
if you change the frequency control from pre-set, or after ground balancing, you will have to re-ground balance the unit. By moving the frequency control counter clockwise, puts the ground balance in a negative setting, thus having to re-ground balance the detector.

The Classic series units do not respond the same way as other brand of detectors do, to super tuning viva the threshold. The threshold is not tied into the discriminate section like it is, say on a Tesoro. Running the threshold up full in the discriminate mode, I did notice a slight increase to target response audio, but I found no noticeable depth increase.

Home of the Classic modifications.
 
I keep the frequency shift at the setting I like all the time. I ground balance when I arrive at the site I'm going to hunt, I do this when the threshold is near the factory setting, I then crank the thresh up all the way sometimes to make those quieter targets loud.
 
Is that a modified classic 3 sl?
 
yes it is. I did the mods. Now It gets 12" on a dime in discrimination mode (in the air) There is less chatter when the frequency shift is done this way. It makes me wonder why whites puts a cap on the classic 3's power.
 
What kind of modifications did you make?
 
n/t
 
Yes what mods did you make? Rob
 
I put on a ground balance, threshold, an ID adjust, a VCO, junk light, and a depth gauge. It's had some chips replaced too. Don't ask me how to do it because I can't remember but it works very well. There is a picture of it in the mods foeum.
 
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