microphone connector shell." You guys owe me a beer since I had a HECK of a time finding this on Heil's website: http://www.heilsound.com/harmonics.htm ...and scroll down to "REMOVING RFI FROM AUDIO
Here's a quick report on what I found. By taking pin 2 to the connector case (pin 1 is mic, pin 2 is shield), the audio gets becomes distorted - buzzy.. Turning on the speech processor, even on just
Duane, My guess is that when you connect the shield to chasis, you are also connecting the internal circuit board to chassis ground also. Maybe that causes some kind of ground loop? The circuit in th
Yep, the "ungrounded shield" that they are talking about is a classic pin 1 problem! Good to see that great minds are starting to run in the same direction! Jim Brown K9YC ___________________________
That is a VERY good thing. Jim K9YC _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
Duane: I ran into the same problem with my ProSet that you did, and learned by trial and (much) error that figure 2-5 in the Orion manual is to be taken literally. The Mic ground and the shield must
Yep - the problem with the diagram in the Orion manual is that it assumes there will be a mic + and - connection separate from the shield. In the Heil setup, and in most similar ham wiring I've seen,
Author: Robert & Linda McGraw K4TAX <RMcGraw@Blomand.Net>
Date: Wed, 23 Jun 2004 22:54:58 -0500
I shouldn't bring this up again for someone will blame it on the "Pin 1 problem". The fact is there's typically 4 connections for microphone audio. There is the Audio Hi or +, Audio Lo or -, Audio Gr
Lee is probably correct in his ground loop statement. I had hum on my transmitted signal when I connected my Heil headset with the Heil / TenTec adapter. I think it was a ground loop since it took ve
Bob, Is the audio ground only present when using a balanced mike? With an XLR connector? On a Heil headset I can only envision +, -, and shield. I'm not trying to be a smart alec with this question,
In a nutshell, I solved my RFI induced audio problem with the Orion and my Heil microphones by tying the Heil's Mic shield to both the Orion's audio ground and to the Orion's chassis connector in the
See my previous post on this subject. I solved my RFI induced audio problems with my Heil mics by tying the Heil's shield ground to both the audio ground and to the Chassis grouns Yep, the schematic
I suspect that the problems here may be related to the difference between balanced and unbalanced audio wiring. Virtually all ham gear uses UN-balanced audio -- as I understand it (I'm not flush enou
Thanks, guys - there have been some very useful ideas to try in the various notes. The most lucrative to me look like the ones talking about separating the shields/grounds. Should be interesting sinc
If the Orion uses balanced input, then why do they label pins 1 and 2 as Mic (1) and gnd (2)? And the PTT switch uses PTT (3) and gnd (2). It appears to be an unbalanced input, and handling of the "g
I'm only going on what I've heard and what I know about audio (and RF). I don't have the benefit of a schematic. :) Jim _______________________________________________ TenTec mailing list TenTec@cont
This was my question to, then I noticed that pin (1) of the microphone goes to pin (2) of the transceiver in Figure 2-5 (September 2003 Manual). If Figure 2-4 is correct, that would put the transceiv
Mic (1) and gnd (2)? And the PTT switch uses >PTT (3) and gnd (2). It appears to be an unbalanced input, and handling of the "gnd" connection is what we've been >discussing. I'm saying all of this wi
Thanks, Warren - that's useful information. One question - you attached the shield of your adapter to the connector shell, and that leaves you 2 wires for the microphone. Did you not include the foot
the shield of your adapter to the connector >shell, and that leaves you 2 wires for the microphone. Did you not include the footswitch connection to the PTT? And, >if you did, what did you use as the