Detectormods Forum
General Category => General Discussion => Topic started by: Herb on November 26, 2016, 10:26:40 am
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Hey all and Woody
I recently bought some new headphones and speaker off you Woody and had a chance to try them out the other day. The headphones are great and a pleasure to use . It sounds like your using a booster when using these in noise cancelling mode . Great but not perfect as with a lot of things . I get a slight high pitch noise when using in noise cancelling mode . I ve experienced this before when using a booster and it's slightly annoying when using in this mode all the time . Can this be easily rectified ? Also the cord could be another 6" longer as mine pulled out during the day's detecting . I'm am 6'3" though so they'd be no worries for anyone shorter. Crystal clear on the targets even when not in cancelling mode . Speaker ok but sounds a bit tinny and quiet but as I only use it for back up it'll do the job! Any one else used these headphones or speaker ? Any thoughts ?
Cheers Herb
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Hi Herb,
The high pitched noise is caused by the current through the coil getting into the headphone electronics, if you are using a booster and it does not have decoupling built in then it will cause this noise, a bad internal grounding in the detector will cause this noise as will a bad coil connector. Try a smaller coil and if the noise gets less then it is coil switching current, try connecting the headphones directly to the detector with a non amplified battery and see if it has gone.
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Cheers Woody
I'm still swinging an unmodded 45 and standard battery that came with it and no booster I'll try another coil next time I go out but the evolution 17x13 I've got on there is relatively new ! The headphones dont make the noise when not in noise cancelling .I don't have another battery to try but may be able to borrow a mates. I'll hopefully be looking at sending you my detector in the new year to work your magic upgrade on. Will this help ? And what's the turn around time roughly ? Cheers Herb
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Hi Herb,
Turn around time is a week or so, The ML battery has an amplifier inside the battery, it may be a case of double amplification and boosting the switching noise from the coil.
I use my own small batteries and that noise does not show any noise.