Solved !
Following the advice given by a list member, I removed all connectors,
dusted them off with compressed air (gently), including the
potentiometers, and the problem went away. It was deffinitely easier
than finding exactly where the RX audio was "dying". The radio had
been in storage for years and was very dusty.
The radio works better than what I could have imagined. The only
discontent comes from the internal fan cycling on and off every few
seconds. Perhaps the airstream hits the temperature sensor directly.
73,
Carlos VK1EA
On 5/25/19, Carlos <carlos.peco@gmail.com> wrote:
> Hi all,
>
> I just bought an Eagle 599AT with NB from a local ham in Canberra.
> This radio is very rare in VK, and even more finding somebody in your
> town selling one (Canberra is the capital city of Australia but there
> is only 400 K people living here).
>
> Price was good, approximately half of what I would have paid for the
> same radio in US, plus shipping plus import tax (yes, in Australia
> they tax second hand goods you buy from overseas).
>
>
> Now the problem:
>
> - With the volume control in the middle, the radio makes no audible
> noise. Like if it had no speaker. I tried the headphone connection
> with an external audio amplifier (volume control in the middle) as
> well as the rear speaker connection.
>
> - Despite of having an antenna tuner and a noise blanker, both were
> OFF in the configuration as I received the radio (which is what
> happens after somebody makes a Master Reset).
>
> - I made my own Master Reset and enabled both antenna tuner and NB module.
>
> - I feel like I'm hearing something. I have to turn the volume knob
> all the way to the right, as well as the external audio amplifier all
> the way to the right as well. That gives me good audio for a quiet
> room, no more. Internal speaker and rear speaker connection is weak as
> well.
>
> - I tested the NB and I can hear very faint "beep, beep" in the speaker
>
> - Now I decided to test the antenna tuner:
>
> BEEEEEEEEEEEEEPPPPPPPP !!!!!!!
>
>
> - So the audio amplifier is there, for sure. Loudest beep ever. The
> tuner works as well.
>
>
>
> - Later I connected the external audio amplifier to the AUX output on
> the rear of the radio. This is the same cable/amplifier combination I
> use with the Argonaut VI. The audio there is as good/powerful as the
> Argonaut VI.
>
>
> - The radio does 100 W in CW, but I haven't tried SSB yet.
>
>
>
> Any hint of what might be happening ? The radio has a great RX audio
> quality, people sound incredibly well, in line with the Argo VI and
> the Corsair II.
>
> Many thanks in advance,
>
> Carlos VK1EA
>
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