MIC bias settings
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Mike Kopacki
The K3S manual says "Bias must be turned on for electret mics (e.g. MH2, MD2, Proset). It must be off for dynamic mics (e.g. Heil mics using HC4 or HC5 elements)."
Does the Heil comment include Heil headsets or only hand-held mics? Thanks, Mike NJ2OM |
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Any mic. Headset is irrelevant...
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Sandor wetsel
I have several mics wired for the K3 only one of which uses the bias voltage. As far as I can tell IF the mic isn't wired for the voltage pin and is dynamic having bias on doesn't matter. The one that does use bias is the Elecraft hand mic. I use a MFJ1262 to switch them I/O and keep the hand mic on the "A" plug, and the dynamic on "B" but leave the bias on [FPL bias] Sandor Wetsel KG4FET MAKE AMERICA GREAT AGAIN!
On Wednesday, February 3, 2021, 07:50:05 AM CST, Mike Kopacki <mikekopacki@...> wrote:
The K3S manual says "Bias must be turned on for electret mics (e.g. MH2, MD2, Proset). It must be off for dynamic mics (e.g. Heil mics using HC4 or HC5 elements)." Does the Heil comment include Heil headsets or only hand-held mics? Thanks, Mike NJ2OM |
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Electret mikes require bias. Dynamic mikes, regardless of brand, must not have bias on. 73 Bob, K4TAX On 2/3/2021 7:50 AM, Mike Kopacki
wrote:
The K3S manual says "Bias must be turned on for electret mics (e.g. MH2, MD2, Proset). It must be off for dynamic mics (e.g. Heil mics using HC4 or HC5 elements)." |
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RON - WA2EIO
I think that Elecraft sends the bias voltage on the mic's audio line, so if a dynamic mic is used, then it will have voltage applied to it, which is NOT good for it!
Some rigs have a separate bias voltage line on their multi-pin mic connector to supply bias to those mics that need it; those that don't will not have any connection to that pin on the connector. Ron WA2EIO |
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Everett N4CY <everettsharp@...>
You can go into configure and turn the mic bias on, or off..
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On Wednesday, February 3, 2021, 9:00 AM, RON - WA2EIO <wa2eio@...> wrote:
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Mike Kopacki
I have no idea if this Heil headset has an electret or dynamic mic. Is there a way to determine that? I don’t want to take a chance of messing up the rig. Maybe it would show up when using the MONITOR function to listen to see how I sound?
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Thanks, Mike NJ2OM On Feb 3, 2021, at 10:07 AM, Everett N4CY via groups.io <everettsharp@...> wrote:
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Michael Kopec
Hello Mike. If the headset has a 8-pin connector, make sure it is wired to match the mic pin out from the K3. If it does than turn ur Bias OFF in the K3 menu. Speak into the mic. If it modulates it is not a condenser mic. de K8NS On Wednesday, February 3, 2021, 10:46:59 AM EST, Mike Kopacki <mikekopacki@...> wrote: I have no idea if this Heil headset has an electret or dynamic mic. Is there a way to determine that? I don’t want to take a chance of messing up the rig. Maybe it would show up when using the MONITOR function to listen to see how I sound? Thanks, Mike NJ2OM On Feb 3, 2021, at 10:07 AM, Everett N4CY via groups.io <everettsharp@...> wrote:
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Easy way.......start with the BIAS OFF. (a) If it works as expected then it is most likely dynamic. (b) If it doesn't work, then most likely it is Electrect and
thus does require bias. (c) Or something is defective. 73 Bob, K4TAX On 2/3/2021 9:45 AM, Mike Kopacki
wrote:
I have no idea if this Heil headset has an electret or dynamic mic. Is there a way to determine that? I don’t want to take a chance of messing up the rig. Maybe it would show up when using the MONITOR function to listen to see how I sound? |
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Ed Pflueger-AB4IQ
Maybe the attachment will help Mike.
Ed.. AB4IQ
From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Mike Kopacki
Sent: Wednesday, February 3, 2021 9:46 AM To: Elecraft-K3@groups.io Subject: Re: [Elecraft-K3] MIC bias settings
I have no idea if this Heil headset has an electret or dynamic mic. Is there a way to determine that? I don’t want to take a chance of messing up the rig. Maybe it would show up when using the MONITOR function to listen to see how I sound? Thanks, Mike NJ2OM
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Mike Kopacki
Ed I don’t see an attachment.
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Thanks, Mike NJ2OM On Feb 3, 2021, at 1:39 PM, Ed Pflueger <ab4iq@...> wrote:
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Ed Pflueger-AB4IQ
Yes I just saw that myself. What it is a page from KE7X’s manual with a list of microphones and how to set them up. Let me give it another try. LOL
Ed.. AB4IQ
From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Mike Kopacki
Sent: Wednesday, February 3, 2021 12:44 PM To: Elecraft-K3@groups.io Subject: Re: [Elecraft-K3] MIC bias settings
Ed I don’t see an attachment. Thanks, Mike NJ2OM
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mikerodgerske5gbc
Also most icoms require bias so if that mic is advertised for icoms that may be a clue. The heil website should tell you.
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73 Mike R 7! Absolutely Awesome On Feb 3, 2021, at 12:54 PM, Ed Pflueger <ab4iq@...> wrote:
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Mike Kopacki
Ok I need to learn more about this KE7X dude!
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Thanks, Mike NJ2OM On Feb 3, 2021, at 2:01 PM, mikerodgerske5gbc via groups.io <mikerodgerske5gbc@...> wrote:
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Sandor wetsel
Mic bias (8v) is sent on pin 6 not the audio line. That is Icom that shares audio/bias
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Sandor KG4FET GOD SAVE OUR NATION!
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RON - WA2EIO
Sandor,
If the rear mic connector on the K3(s) is used, it is a simple 2 conductor phone plug, so in that case wouldn't the bias voltage have to be carried on the audio line? Ron WA2EIO |
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Jim Brown
Bias for all unbalanced electrets is applied through a moderately high value resistor between audio high and signal return. Electret capsules have very high output impedance, so they drive a FET follower that needs a bit less than 1 mA to operate.
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73, Jim K9YC On 2/3/2021 3:58 PM, RON - WA2EIO wrote:
Sandor, |
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rich
Just to clarify, I believe that the rear panel mic jack is a
stereo jack. The mic plug should also be a stereo plug with the
ring not connected. Based on Fred's book. Rich On 2/3/2021 18:58 PM, RON - WA2EIO
wrote:
Sandor, |
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Jim Brown
On 2/3/2021 4:35 PM, rich wrote:
Just to clarify, I believe that the rear panel mic jack is a stereo jack. The mic plug should also be a stereo plug with the ring not connected. Based on Fred's book.To be technical, it's a 3-circuit jack. Although it's most common use is for stereo audio, it can be used for other signals. Elecraft, for example, uses one for RS232 on some gear, including the KX3. 73, Jim K9YC |
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rich
Thanks, so the floating ground showed in Fred's book is significant, correct?
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Rich On 2/3/2021 20:04 PM, Jim Brown wrote:
On 2/3/2021 4:35 PM, rich wrote:Just to clarify, I believe that the rear panel mic jack is a stereo jack. The mic plug should also be a stereo plug with the ring not connected. Based on Fred's book.To be technical, it's a 3-circuit jack. Although it's most common use is for stereo audio, it can be used for other signals. Elecraft, for example, uses one for RS232 on some gear, including the KX3. |
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