Barry,
I cannot comment on the RemoteRig setup because I do not have any
experience with it.
There are some statements that may require clarification - I think the
Heil document is somewhat confusing.
1) For a dynamic microphone, turn bias off.
2) The K3 (and K3/0 and mini) can turn bias on or off - so it is not
dependent on electret microphones such as the Elecraft MH2. The choice
of bias or not is a user choice in the menu.
3) The Heil microphone elements are relatively low output.
4) The K3 microphone "L" or "H" selection determines the gain of the
microphone preamp. "L" is low amplification, and "H" is higher
amplification. With Heil microphones, you may have to use the "H" setting.
5) Try the "H" setting with bias off in the menu and see if you can get
the required 5 to 7 bars on the ALC meter.
73,
Don W3FPR
On 12/24/2014 1:30 AM, Barry Baines wrote:
I am having difficulties getting my Heil ProSet with the HC-4/HC-5 mic
cartridge to work with the K3/O-Mini + RemoteRig (purchased from Elecraft)
where there is no audio reaching the K3 at the radio site. I’m told that the
Heil mic cartridge is a dynamic element with no pre-amp gain. The mic
connection for the K3 is set for the rear panel with no Bias and “Low” Gain per
the Heil documentation on their website (“All Things Elecraft”). The incoming
audio (transmit) is fed from the Remote Rig-Remote front panel Aux/Mic using
the supplied cable from Elecraft that connects to both the PTT In and Mic-Mono
at the back of the K3.
I’ve tried various configuration setups with the Control-RR to see if changing
the audio level from the control site makes a difference, such as increasing
the Codec inp gain, changing Codec Inp preamp to “no” and varying the Audio
Quality specified at both remote rig units. Using TX-Test, I then speak into
the Mic and check for ALC and compression, varying the mic gain and
compression. At no time do I see any measurement on the K3/O-Mini meters for
ALC and compression. The “monitor” capability is also not working as I can’t
hear myself through the headset.
I’m wondering if the Remote Rig system is setup for the Elecraft MH-2 mic which
I understand does have amplification. If so, this may prevent a dynamic mic
cartridge working properly with Remote Rig-Control. I’ve tried using the mic
input on the side of the K3/O-mini as well as using the Kenwood adapter to
utilize the 8-pin connector. I saw a note the other day from Mark, VA2MM which
shows his setup for the Radio Side and Control Side; those settings didn’t
work. I’ve tried the default settings specified in the “K3-Remote Owner’s
Manual” with no success.
I have excellent audio quality coming from the K3 to the K3/O-Mini unit; the
receiver audio sounds fine at the control site. I presume this means that there
is a good audio connection between the two remote rigs. The radio site uses DSL
with a low bandwidth (10 Mpbs Down/784 Kpbs Up) so if the receiver audio is
good, I’m presuming that bandwidth wouldn’t be the problem on the transmit side
as it would be on the higher capacity downlink to the DSL site.
Any suggestions on what to check either in the K3 configuration or the Remote
Rig setup at either the control site or the remote site? Given that the
connection is through the internet, are there any router or other
considerations that I should check? At the Remote (radio) site, I’m using the
default UDP/TCP configurations for RRIG_cmd, RRIG_audio, and RRIG_sip with port
forwarding to the Remote Rig-Radio. I do have the ability to access the
Remote Rig-Remote from the control site so that I can make configuration
changes at both ends and restart both Remote Rig devices. Consequently, I can
update both Remote Rig boxes (control and remote) as needed.
I should also note that the last time I was at the remote site, I was able to
test the system at the station itself and push audio from the K3/O-Mini to the
K3 via the Local Area Network when the K3/O-mini was next to the K3 on the same
LAN. When I got back to the “control site” , I had no transmit audio at al to
the K3.. That may suggest an internet issue, but at this point I have no real
handle on the source of the problem.
Thanks and Merry Christmas,
Barry Baines, WD4ASW
Westborough, MA (Control Site)
Folkston, GA (Remote Site)
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