Bernd Maestling wrote:
> Hello Ed,
>
> I can't follow you at the moment.
> My settings are now the following:
>
> T855:
> PL100 1-2
> PL101 2-3
> PL102 2-3
> PL103 1-2
> PL104 1-2
> Pl105 1-2
> PL106 1-2
>
> T856:
> PL100 3-4
> PL101 5-6
> PL102 5-6
> PL103 1-2
>
> The Audio is going from the T855 Pin 1 (Line I/P1)
> -> controller -> T856 Pin 6 (Audio 2).
>
> All other combinations won't give audio or this loud noise
> on the audio as I wrote before (Audio1->Audio1 (or Audio2,
> can't remember))
>
> What did you mean with TB1-1...?
>
> The jumpers on the connetors are all open now.
>
> 73
> Bernd
> DM5BM
>
You have the T855 RX set up as de-emphasised which should produce a
reasonably flat response with varying audio input frequencies. This is
the same as most folks use. As you are connected to T855-1 for RX audio
you also need to ground T855-4. If you don't want to use the transformer
isolated RX audio (T855-1&4), you could take it directly from T855-6
which is de-emphasised unsquelched audio.
It looks like you have the T856 TX set up in a way that would roll off
the highs. Try:
PL100 3-4
PL101 1-2
PL102 9-10
PL103 3-4
This should give a flatter overall system response RX to TX.
TB1 is on many / most of the base stations and is a terminal block that
the receiver and transmitter wiring terminates at (TB2 is used for
multiple frequency select). Both terminal blocks are part of a small PC
board on the back of the card cage. By changing the jumpers on that PC
board you can configure the system to be a stand alone repeater by
connecting the RX 600 ohm line outputs to the TX 600 ohm line inputs and
also connect the GATE O/P (COS) to the TX PTT input. Or you can remove
the line input/output and GATE jumpers to configure it as a base
station. Since you are using an external controller, you would set it up
as a base station and use your controller for both audio and PTT functions.
As your Tait was originally shipped as a stand alone repeater, it will
have the line input and outputs tied together unless you have removed
the jumpers on the small external PC board.
Verify that:
T855-1 is not connected to T856-1
T855-2 is not connected to T856-2
T855-3 is not connected to T856-3
T855-4 is not connected to T856-4
If they are, make sure T856-6 is not connected to T856-7 or you will
have multiple audio paths. This may be part of the loud noise you hear
using some configurations.
Ed Yoho
WA6RQD
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