|
Hans, I wonder if you might recommend a mic yet, so that we're ready to roll when that fw update is posted for the masses?!
?
--
John AE5X
|
I second this request. If we can get the mechanical (plug) and electrical requirements the group can get to work finding an off the shelf product or putting a bill of materials together.
?
Brian
KB9WFS
|
Hans, I wonder if you might recommend a mic yet, so that we're ready to roll when that fw update is posted for the masses?!
Sorry I have not thunk that far ahead yet. The built-in mic is an elecret. No doubt a not particularly fine one. I would hope that most electret mics would work... we shall see?
|
I built up the K6ARK microphone from Printables but with a different element - please see . Hans has one of these for testing - I'm curious to see how this compares to the built-in electret element.
|
The parts list for the QMX+ states the microphone is a "6mm Electret", nothing more.
I suspect anything that claims to be an electret microphone would probably work.
?
These are similar to what comes with the QMX+
?
If you it will work better if you spend more money, there's this:
?
These corded mikes would probably work too:
?
Jerry, KE7ER
|
I'm baaaaack !
Getting ready to open my QMX-PLUS package !
72,
Bill, N4QA/QRP\
|
On Wed, Oct 9, 2024 at 01:33 PM, Jerry Gaffke wrote:
These corded mikes would probably work too:
?
?
Here's a wiring diagram for the K-type (Kenwood, Baofeng, Wouxun, etc.) speaker-mics:
The PTT is between the 3.5mm sleeve and the 2.5mm sleeve; the mic return is also to the 2.5mm sleeve, and there is no ground on the 3.5mm plug.
So you need both plugs inserted for PTT to work.
This arrangement has frustrated me for decades.?
?
73, Don N2VGU
?
Here's the more-sensible (to me, anyway) Icom method:
Separate PTT could also be put on the 3.5mm ring.
?
?
?
|
I'm planning to use a mic + amplified speaker, with a modified version of this - it need modifying as the connector spacing on QMX/+ is slightly different from the (tr)usdx.?
Hoping the mic is suitable!
|
My first QMX-PLUS QSO ( 15m FT8 ) is in the log !
Mni tnx, Hans and crew !
72
Bill, N4QA/QRP
|
Hans:? Would the radio's SSB function work properly with an external dynamic mic in place of the specified electret?? ??
I ask because I have several on hand already which I could quickly wire up..?
I could wire in a DC block if needed.? Would it be required?
73, Don N2VGU
|
Congratulations! This is super cool. Its exciting to watch the growth of QMX.
Regards,
Gordon WA8Q
|
On Thu, Oct 10, 2024 at 07:39 PM, Donald S Brant Jr wrote:
Would the radio's SSB function work properly with an external dynamic mic in place of the specified electret??
Looking at the schematic, you would likely need some adapting for a dynamic mic.
The circuit supplies a 3.3V (VDD) bias voltage to the mic via a 2.2k resistor: so you would likely need the DC block.
Also, the mic signal is simply received into the processor pin between 10k resistors to power and ground, so it is wired for high impedance.? The low impedance of a dynamic mic wouldn't directly work well, but you could wire in a tiny audio transformer.
?
Perhaps Hans will add software for a PTT on the Tip terminal?
|
Hi Stan, all
Yes with a dynamic mic you probably need an external amplifier I think.?
And yes it's my itention to have PTT on the other jack pin.?
73 Hans G0UPL
On Thu, Oct 10, 2024 at 07:39 PM, Donald S Brant Jr wrote:
Would the radio's SSB function work properly with an external dynamic mic in place of the specified electret??
Looking at the schematic, you would likely need some adapting for a dynamic mic.
The circuit supplies a 3.3V (VDD) bias voltage to the mic via a 2.2k resistor: so you would likely need the DC block.
Also, the mic signal is simply received into the processor pin between 10k resistors to power and ground, so it is wired for high impedance.? The low impedance of a dynamic mic wouldn't directly work well, but you could wire in a tiny audio transformer.
?
Perhaps Hans will add software for a PTT on the Tip terminal?
|
I am so pepped for this it is not even funny. I first saw that the QMX+ even exists just to-day. And a high efficiency SSB firmware upgrade? Yes, please, Santa!
Vy 73,
Brighid
KF7RHB
|
Would a mic that works with a tr(usdx) work? Both for mic and PTT wiring?
On Friday, October 11, 2024, 11:06 AM, Stan Dye <standye@...> wrote: On Thu, Oct 10, 2024 at 07:39 PM, Donald S Brant Jr wrote:
Would the radio's SSB function work properly with an external dynamic mic in place of the specified electret??
Looking at the schematic, you would likely need some adapting for a dynamic mic.
The circuit supplies a 3.3V (VDD) bias voltage to the mic via a 2.2k resistor: so you would likely need the DC block.
Also, the mic signal is simply received into the processor pin between 10k resistors to power and ground, so it is wired for high impedance.? The low impedance of a dynamic mic wouldn't directly work well, but you could wire in a tiny audio transformer.
?
Perhaps Hans will add software for a PTT on the Tip terminal?
--
Jginaz
|
According to the wiring diagram shown on this site for the (tr)uSDX, the microphone port wiring is the same as used on the QMX.?
|
Would a mic that works with a tr(usdx) work? Both for mic and PTT wiring?
Yes
73 Hans G0UPL
|
IMO there is only question remaining Thanks Giving or Xmas.?
I don¡¯t know about you guys but I check this forum twice a day. lol?
---------------------------------
73 de Marek SP9TKW
|
toggle quoted message
Show quoted text
On Friday, October 11, 2024, 12:10 PM, Hans Summers <hans.summers@...> wrote:
Would a mic that works with a tr(usdx) work? Both for mic and PTT wiring?
Yes
73 Hans G0UPL
--
Jginaz
|
Marek SP9TKW wrote¡ IMO there is only question remaining Thanks Giving or Christmas. Here in Canada, Thanksgiving is on Monday! -- 73 Keith VE7GDH
|
Bill, N4QA/QRP
Donald S Brant Jr
ZL1SGS
Gordon Young
Aunty Bee KF7RHB
Marek SP9TKW