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Re: Help me! annoying ticking in the audio #bitx40help

 

Sergio? IU2KOI

If turning down the volume control decreases volume of the clicking then the
problem may be ahead of that point.? If turning down the volume control does
not decrease the clicking then the problem may be after the volume control.?

Since the problem goes away when the Raduino is unplugged it may be coming
from that unit, but not 100 percent sure of that.? Unplugging the Raduino kills
several signals to the BITX and thus clicking going away may be caused by
disabling something in the BITX itself.

At this point we probably need to know if this rig is a BITX-40 or a uBITX?? Next
troubleshooting steps will depend on which radio we are working with.?

Arv
_._


On Tue, Apr 17, 2018 at 1:05 AM, SaMa photo SaMa photo <infosamaphoto@...> wrote:

Thanks for the reply
it's maybe the first thing I did! I tried to feed it with two different stabilized power supplies! 12V 2A and 12V 5A but does not change anything!
Tested with antenna and without antenna but does not change anything! I also realized that he receives nothing! The antenna to try was just a piece of wire, just to try the reception!
If I disconnect the bipolar raduino plug, the noise disappears! If I disconnect the three-pole potentiometer plug, the noise remains.
I do not know what to do... :-'(



Da: [email protected] <[email protected]> per conto di Arv Evans <arvid.evans@...>
Inviato: luned¨¬ 16 aprile 2018 18:47
A: [email protected]
Oggetto: Re: [BITX20] Help me! annoying ticking in the audio #bitx40help
?

Sergio? IU2KOI

Have you made sure that the interference is coming from inside
the BITX and not from some external source?? Moving the BITX
to another location or using a battery power source could help
determine if the problem is internal or external.

Removing the antenna connection and shorting the antenna terminals
can help to determine if the clicks are internal or external.? Just be
sure that you do not attempt to transmit while the antenna is shorted.

Static build up on the antenna can cause clicks as the charge is
discharged by arcing.? A 47K ohm resister across the antenna
terminals can bleed off static build up without interfering with antenna
impedance, if this is the problem.

Arv? K7HKL
_._
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