CM108 USB fob no PTT/red LED

App_rpt-users
1

I’m running DIAL on a R-Pi2 into a modified USB fob for connection to my repeater.

Everything seems to load and be configured fine, but I can’t get the fob PTT to trip. I believe the PTT FET is driven from the red LED on the fob (pin13) and I can’t get a new unmodded fob to cycle the red LED either.

Simpleusb-tune-menu “f” test of PTT and audio shows no LED/PTT activity, but tone is OK.

Audio courtesy tones and hang time and receive audio passes the in/out of the fob during COR, just NO keying.

Now I did install DIAL on the R-Pi2 without CM108 attached if that was important.

Ideas where the config is unright?
73,

Duane KA1LM #42996

2

Duane,
The red LED on the sound fob is not PTT. It’s mute. You would
need to add a LED to the PTT output circuit to get a LED for
transmit.

73, Steve N4IRS

···

On Tue, Feb 23, 2016 at 1:52 PM, DuaneVT
. selkie2@comcast.net wrote:

            I'm

running DIAL on a R-Pi2 into a modified USB fob for
connection to my repeater.

            Everything

seems to load and be configured fine, but I can’t get
the fob PTT to trip. I believe the PTT FET is driven
from the red LED on the fob (pin13) and I can’t get a
new unmodded fob to cycle the red LED either.

              Simpleusb-tune-menu "f"

test of PTT and audio shows no
LED/PTT activity, but tone is OK.

            Audio

courtesy tones and hang time and receive audio passes
the in/out of the fob during COR, just NO keying.

            Now

I did install DIAL on the R-Pi2 without CM108 attached
if that was important.

            Ideas

where the config is unright?

            73,

            Duane

KA1LM #42996

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3

See enclosed photo…you will need to cut a
trace that angles over to the switch on the side of the board with the Red LED,
and drill a hole as shown (1/16"), then solder a piece of wire wrap wire
from the trace leading to the angle trace (from LED resistor R10) and connect
it via the hole to pin 13 on the CM-108. I’ve done it several times. I kind of
like the red LED when I’m troubleshooting the Pi or the BBB rpt_app setup.

Thanks,

Bob

kk6ecm

···

From:
app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of DuaneVT .
Sent: Tuesday, February 23, 2016
10:53 AM
To: app_rpt-users@ohnosec.org
Subject: [App_rpt-users] CM108 USB
fob no PTT/red LED

I’m
running DIAL on a R-Pi2 into a modified USB fob for connection to my
repeater.

Everything
seems to load and be configured fine, but I can’t get the fob PTT to trip. I
believe the PTT FET is driven from the red LED on the fob (pin13) and I can’t
get a new unmodded fob to cycle the red LED either.

Simpleusb-tune-menu
“f” test of PTT and audio shows no LED/PTT activity, but tone is
OK.

Audio
courtesy tones and hang time and receive audio passes the in/out of the fob
during COR, just NO keying.

Now I
did install DIAL on the R-Pi2 without CM108 attached if that was important.

Ideas
where the config is unright?

73,

Duane
KA1LM #42996