¿ªÔÆÌåÓý

  1. Direwolf
  2. Messages
Single Messages Topics Expanded Polls

Re: Changing from Signalink to Easy Digi

 

Lee,
?
Using the right 30ga wire is the key to making that connection. I use a pretty larger magnifier to assist my aging eyes!! HIHI!
?
Danny? NF4J

?
?
Sent:?Monday, November 21, 2022 at 11:19 AM
From:?"Lee Bengston" <kilo5dat@...>
To:[email protected]
Subject:?Re: [direwolf] Changing from Signalink to Easy Digi
Great info, but I don't agree with "If you have no soldering skill".? I have soldered lots of things including some very small wires on a microphone replacement cable that was part of a custom cable used to provide an external packet port on a radio that did not have one built in.? I find soldering a PTT wire on that CM108 dongle (to the corner pin on the chip) to be fairly difficult, and internet searches show I'm not the only one.
?
73,
Lee K5DAT
?
?
On Mon, Nov 21, 2022 at 10:52 AM N0YWB <n0ywb1@...> wrote:
On Sun, Nov 20, 2022 at 03:30 PM, Fred Bouwman wrote:
Kenwood TM-281a r
I do not recommend the easy-digi interface.?
Isolation transformers are rarely necessary unless connecting to old vacuum tube transceivers.?
The high frequency rolloff of the isolation transformers will prevent the faster data rates.?
?
The CM108 chip on the Sabrent sound dongle is likely covered with epoxy?
and will be hard to attach a wire to pin 13 on the USB sound dongle.? ?
I used a bare CM108 USB sound dongle. Only $4.?
?
Instructions to modify for PTT control:?
?
Skip the connection for COS, it is only necessary for the AllStar application.?
Instead of the 10k axial resistor, I reused one of the SMD microphone bias resistors removed from R6 and R7 on the dongle.
If you have no soldering skill, you can buy an assembled unit.?
or?
?
fldigi, direWolf, soundmodem, ARDOP and VARA Winlink have added direct?
CM108/CM119 PTT support in their Linux and Windows versions.?
For other digital modes like WSJTx (FT8) and JS8Call use CAT7200?
to emulate the RTS interface for PTT.?
?
?
In direwolf.conf, comment out the other PTT methods and use?
"PTT CM108"?
See page 6 of the TM281A manual for connection info.?
?
?
If you suffer from common-mode "RF in the shack",?
I additionally recommend using a shielded USB extension cable, and
soldering 100pF capacitors from GND to MIC, SPKR and PTT on the dongle.?
?

?

?
Join [email protected] to automatically receive all group messages.