MODIFICATIONS ON THE TRANSMITTER FROM THE ALAN 54E
You need to do some small changes with ALAN 54th 2400 or 4800 for you can use it for packet radio.
The conversion of the Alan is very simple, the PTT branch you from 5 pin DIN plug, which sits on the side of the transceiver confirms there of your branch to pin 3 of the DIN plug the PTT off.
The solder wire for the TX data you inside the transceiver stuck between 2N2 and C56 = R85 = 2K2.
Note the Wave it is therefore no longer limited.
So gentlemen only there so bad at.
Use shielded audio cable that you definitely can not miss out along the connector hangs.
And care for the shortest possible ground connection to the transceiver.
MODIFICATIONS ON THE FROM THE ALAN 54E
Receiving is harder than expected, in my case I drained the reception of the FM detector.
For RX data first take a 680k resistor, one side of this mount to the junction of R21 and R23 = 6k8 = 18k.
The other side is than the RX data output.
When all connections are made, connect the TNC or modem and start the program.
After the package program properly booted, you must to arrange T5.
You do that no more than to arrange a eighth stroke.
The coil T5 is normally factory-set for reasonable point by ear receipt.
If you have a scoop you can adjust nicely without the scoop is also possible with some patience.
First you have to make sure that you without the antenna hear only noise received this should sound as loud as possible from the speaker when you turn T5.
Now a little touch to the right or left so he was on the brink of becoming softer.
This is, in practice, the best point for packet reception.
Now you're ready for 4K8 packet radio reception.
SOURCH: THE NL1PZN
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