Hi Fred,
To answer your question my set up has a push to talk for transmitting. If
your theory is correct I should be able to improve the situation by reducing
the microphone gain. The GX60's internal intercom has the following
parameters that can be set:
- RF Level
- Headphone level
- Side tone level
- Intercom level
- Intercom squelch
- Noise level
I was hoping to set one that said "Microphone gain", but alas no. I will dig
out the manual tonight and see if any of the above settings might help.
Cheers, Paul
----- Original Message -----
From: "Fergus Kyle" <VE3LVO@rac.ca>
Subject: Re: Europa-List: Feedback problem with the radio
>
> Paul,
> It can sometimes be transmitted through tight clamping of
units
> in the system, but this does not sound like that symptom. If your headset
> earcups 'leak' then the acoustic feedback would be the cause. Tight
earcups
> tend to reduce that.
> Is your system operated as 'VOX' - voice-operated
transmission?
> That is, do you have the sound of your voice open the transmitter, or do
you
> press a transmitt button? If the former, the sound from nearby will
trigger
> the transmitter open as well as the intercom. VOX is operated by two datum
> voltages - a large one which triggers the transmission and a smaller one
> below which the transmitter shuts off. Both of these voltages is set by a
> pair of potentiometers usually somewhere moderately available to the
> avionics bod who installs/repairs same. The same may apply to the intercom
> unit.
> We'll keep an eye open for your solution when it comes.
> Cheers, Ferg
> ----- Original Message -----
> From: "Paul McAllister" <paul.mcallister@qia.net>
> To: <europa-list@matronics.com>
> Subject: Europa-List: Feedback problem with the radio
>
>
> <paul.mcallister@qia.net>
> |
> | Hi All,
> |
> |
> | I have an odd problem with my GX60 when trying to transmit. I found it
> would start oscillating, it would start with an echo and then break into
> full audio feedback, similar to as what a PA system does when the
microphone
> is too close to the speaker. I fooled with the problem for the longest
time
> and I finally narrowed it down to my LightSpeed headsets. I called
> LightSpeed and sure enough they knew about the problem. They invited me to
> send the headsets back and they would fit a new shielded battery box.
They
> came back and they "sorta" worked, but unfortunately they would still do
it.
> |
> | A this point I resigned myself to using my Telex 3500's. These always
> seemed to work, but today they started to exhibit the same problem... now
I
> am in a bit of a quandary on how to trouble shoot this problem. I do not
> have an audio panel at this time, I am using the internal intercom in the
> GX60.
> |
> | Does anyone have any ideas where to head with this.
> |
> | Paul
> |
> |
> |
> |
> |
> |
> |
>
>
|