BCT15X: Buzzing Through Speaker

[Jason1313]

Wondering if anyone has experienced a buzzing through external speaker or using headphones, less through internal speaker. Seems to be constant while scanning and volume up and down has no effect, sounds fine while stopped on frequency. Purchased through amazon used good condition sent it back got another one same thing happened. Any thoughts would be helpful. Thanks

 

[wtp]

how far away is you phone ?

 

[Jason1313]

Yea It was close , but moved it to different parts of the house same result. Tried car charger adapter same result. Have BC125AT sounds perfectly through headphones

 

[Icanhearit]

I have 2 (but hand touched 3) BCT15Xs, yes, all of them (manufactured 2020 - 2021 in case matters) have scanning noise via ear jack hooking to a speaker (or especially using earphone), in fact I returned the 1st one that's why I say I have 2 but touched 3. It is clean from internal speaker. Nothing to do with close to phone etc or earphones. It is scanning noise, once lock on to a signal, the noise is gone and immediately back if start scanning again.
Yes, BC125AT is clean (silent) via ear jack or speaker. But when BC15x does lock on a channel, it is even better than the bc125at, that's why I use it at home.

I actually hear similar scanning noise from SDS100 through ear jack, somehow mostly only when scanning DMR, not analogue or P25.

 

[Jason1313]

Ok Thanks for the reply. Not sure I am going to keep it if there is no fix for it. Any other analog base scanners that would work as well or better

 

[tvengr]

By any chance are you using an AC powered computer speaker. You may have a hum loop and need an audio isolator. The external speaker and headphones probably have better low frequency response causing an AC hum to be louder. The fact that the hum level does not change with the volume control is a typical symptom of a hum loop.

 

[Icanhearit]

I'm pretty sure it noise has nothing to do with AC. Different type of noise, the noise is "rounded", the pattern is also related to how many channels you put into a list. All noise will be quiet once stop scanning and stay on an open channel. Also no hum if you hold to a channel, no matter the channel has signal or not (as long as not loop scanning)..

 

[Jason1313]

Ok Guess I will have to deal with it or get something else. Thanks for all the replies

 

[Ubbe]

Ok Guess I will have to deal with it or get something else. Thanks for all the replies

The volume control sits on a separate circuit board. It's probably the same type of ground problem as the SDS200. Check and re-seat the cable in both ends that connects the circuit board to the main circuit board. Check if there's a way to screw or solder a ground wire to the volume control board.

/Ubbe

 

[Jason1313]

Ok I will check that out, thanks for the suggestion