Author Topic: Audio feedback in K3/0 speaker  (Read 132 times)

K7FL

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Audio feedback in K3/0 speaker
« on: 2018-11-06, 18:32:44 »
I have recently reconfigured my remote station and seem to have made a minor issue from the past, more prevalent now. When transmitting, I can hear my transmit audio through the K3 speaker slightly delayed. The audio sounds like my SSB signal, without a BFO. Severity is dependent on power levels. At 100 watts, it is loud enough to be quite annoying. Obviously, Iím getting RF into the RRC box or cabling.

All components in the remote box ... radios, amplifiers, hubs, computer, RRC, etc have chassis grounds individually run to a single point of contact (ground rod for electrical service panel).

Given the symptoms, any idea where I should begin my troubleshooting? I suspect ferrite beads are in my future, but would like a sense of where to begin.

Thanks
Dennis
K7FL/5H2DA

dj0qn

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Re: Audio feedback in K3/0 speaker
« Reply #1 on: 2018-11-06, 18:36:08 »
Hi Dennis,

Just turn off your monitor, you can not use it for remote operating due to the latency. Same goes for CW sidetone.

73,
Mitch DJ0QN  / K7DX

K7FL

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Re: Audio feedback in K3/0 speaker
« Reply #2 on: 2018-11-06, 19:47:59 »
Monitor already OFF

sm2o

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Re: Audio feedback in K3/0 speaker
« Reply #3 on: 2018-11-07, 08:09:16 »
Hi
With the default settings the Control-RRC mutes the Speaker when PTT is active so if you hear something when PTT is pressed ou probably has set Full Duplex = Yes in the Control-RRC (Anvanced settings). Try to set it back to No

73 de mike

K7FL

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Re: Audio feedback in K3/0 speaker
« Reply #4 on: 2018-11-07, 21:24:47 »
Resolved ... part of the chassis ground bus had became dislodged. Reconnecting all commons removed the feedback.
Thanks for the help
Dennis