On 6/11/2020 10:16 PM, Bob McGraw K4TAX wrote:
a special thanks to you for reporting back to the group your findings
and results.
Thanks for your input as well Bob. Lots of talented folks on the
reflector who take the time to respond to questions. The least one can
do is provide feedback.
Tony;
Seems you have done an excellent job and things are working as you
expected. And a special thanks to you for reporting back to the group
your findings and results. I wish everyone did that. We'd all be
informed.
73
Bob, K4TAX
On 6/11/2020 8:00 PM, Tony wrote:
All:
The K3S
the two using the microHAM router software.
Jim N7US
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Tony
Sent: Thursday, June 11, 2020 20:01
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Balanced Mic to Unbalanced Connection Follow Up
Question
All:
The K3S
All:
The K3S seems to work flawlessly with XLR cable connected to the rear
panel mic input as per the groups recommendations. I have pins 1 and 3
connected to the sleeve of the 1/8" plug and pin 2 to the tip. I'm using
a dynamic mic so the bias is turned off. This setup works fine on the
KX3
I use a Shure SM-58 mike with my K3S. It is a balanced dynamic mike.
It has an XLR at the mike and the 8 pin Foster connector at the radio.
I use good quality, 2 conductor, shielded mike cable.
It is wired as follows:
XLR pin #1 to Foster pin #8 {shield}
XLR pin #2 to Foster pin #1
Interesting stuff here. Since the original post was regarding the Rear
Mic jack. Would this method also be recommended for the Front Panel
Mic Jack also?
My guess is yes
Rich
K3RWN
On 6/9/2020 22:50 PM, Don Wilhelm wrote:
Joe,
I did not say anything to the contrary. The 'dongle' that
> A capacitor in series with one side of the balanced line.
First, a dynamic mic element as is found in the PR-781 is neither
balanced nor unbalanced. That is determined by the external
connections (the input circuit to which the mic element is
connected). I know of no current amateur
Both would work.
Sketch out the equivalent circuit and you'll see why.
As to using a TRS or TS 1/8th (3.5mm) plug, you'll have to consult the
radio's manual to see exactly what's connected to the tip and ring, and
if the sleeve is actually connected directly to the chassis, not via a
convoluted
The PR-781 does not like the DC bias supplies from many newer ham radios.
A capacitor in series with one side of the balanced line. Heil offers a
specialized cable for three pin XLR mike to the mike jack on front of
different brands of transceivers. Contains the capacitor as required.
Works for
Since the input is clearly marked MONO, a tip-sleeve is the correct plug. If
one uses a TRS plug, the ring should be connected to the sleeve inside the
plug.
Using a mike which has an XLR, pin 2 should connect to the Tip, pin 3 to the
sleeve, and the shield only connects to XLR pin 1 at the
If yuh ou use a TRS plug, don’t use the “ring” for anything.
Extending the pin 1 wire out of the connector and connecting to the radio
“Ground” lug is also tecvonended in some circles.
Sent from my iPhone
...nr4c. bill
> On Jun 9, 2020, at 4:51 PM, Tony wrote:
>
> All:
>
> I have a
Joe,
I did not say anything to the contrary. The 'dongle' that I was
referring to is the connection to pin 1 which should be connected to the
outside of the K3/K3S enclosure.
73,
Don W3FPR
On 6/9/2020 9:13 PM, Joe Subich, W4TV wrote:
On 2020-06-09 8:14 PM, Don Wilhelm wrote:
So --- make
On 2020-06-09 8:14 PM, Don Wilhelm wrote:
So --- make an adapter so that pins 2 and 3 are connected to the tip
and ring of the mic jack,
No, no, no! The ring of the K3/K3S rear panel mic jack *IS FLOATING*.
Pins 2 and 3 of the XLR *MUST BE* connected to tip and *SLEEVE*.
73,
... Joe,
So --- make an adapter so that pins 2 and 3 are connected to the tip and
ring of the mic jack, then add a one wire 'dongle' exiting from the XLR
plug that is connected to XLR pin 1. Connect that wire to a screw on
the chassis of the K3/K3S/KX2/KX3.
Noise, hum and buzz are then conducted
Correcting *ALL* the typos
So which is correct?
They are electrically equivalent.
Pin 2 of the XLR connection is Mic+
Pin 3 of the XLR connection is Mic-
Pin 1 of the XLR connection is the cable shield (ground).
Mic audio is present between pins 2 and 3.
Pin 1 is nothing more than
Correcting Joe's typo, Mic audio is present between pins 2 and 3, NOT
between 2 and 1.
73, Jim K9YC
On 6/9/2020 2:54 PM, Joe Subich, W4TV wrote:
> So which is correct?
They are electrically equivalent.
Pin 2 of the XLR connection is Mic+
Pin 3 of the XLR connection is Mic-
Pin 1 of the
> So which is correct?
They are electrically equivalent.
Pin 2 of the XLR connection is Mic+
Pin 3 of the XLR connection is Mic-
Pin 1 of the XLR connection is the cable shield (ground).
Mic audio is present between pins 2 and 1.
Pin 1 is nothing more than a shield and should be
All:
I have a follow-up question regarding balanced mics and unbalanced
connections. I'm about to connect a balanced dynamic microphone (Heil
PR-781) to the rear mic input on my K3S which has a 1/8" unbalanced mono
connection.
One recommendation was to connect XLR pin #2 mic (+) to the tip
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