Date   
Re: Alternatives to Baofeng mic?

AF7XT
 

Kenwood KMC-8A


On Tue, Dec 31, 2019 at 7:12 AM Joel Caulkins/N6ALT <caulktel@...> wrote:
I have to say that when I first hooked up my new V6 Ubitx I measured power output on 40 meters using the Baofeng mic, it was around 8 watts, then I switched to the http://www.qrpkits.com/microphone.html mic and measured 10 plus watts. The first report I got told me the Baofeng mic sound clamped and tinny while the qrpkits mic sounded clear and full audio and I came up a couple of S units. I don't doubt the Baofeng mic will work just fine, but why not have the best audio you can? I now have a total of 5 of these mics and always get good audio reports. On a side note, I bought a Xiegu G1M SDR radio when they first came out, it came with the exact same Baofeng mic, after a few bad audio reports I decided to modify the mic by drilling a larger hole in the housing and changing the electret capsule, it sounded better but still not as good as the qrpkits mic, so now I just use them on all of my radios and always get good reports. FWIW.

Joel
N6ALT



--
one of these days I will have an internet connection faster than my computer

Re: S-Meter on Nextion Display

Richard Spohn
 

Thank you Ted, this is great info for me, I will research! I have sat
on the sidelines since v1, watching the uBitx develop; I am a big fan
of AFarhan, I think he is a kind of hero...and the v5 with Nextion and
CEC firmware is the way to go for me! HAPPY NEW YEAR -- Rich WB2GXM

On 12/31/19, Ted via Groups.Io <k3rta=yahoo.com@groups.io> wrote:
Hi, Richard.

The S-meter in the CEC NX_S software will work fine though some have added a
simple audio amp (LM386, etc) between a tap from the yellow (vol pot "high")
wire on the audio header to Pin 7 of the Raduino header in order to get full
range from the meter.  One then uses part of the Memory Manager software (
http://www.hamskey.com/2018/01/ubitx-memory-manager-program.html#more ) to
set the lower and upper range of the meter readings.

If you do take the time to staple in a second Nano processor into your build
and blow additional firmware into this second Nano, then add a few wires, a
small disc capacitor, and a pair of resistors, your S-meter will react a bit
faster AND you will get some extra features that are neat to play with (and
you don't need an additional audio amp to feed it).  Here's how:
http://www.hamskey.com/2018/07/standalone-signal-analyzer-i2c-type_29.html#more
This is amazingly easy to do, if you don't mind soldering wires to the Nano
pin positions. It certainly takes no more work or time than it does to wire
in a second audio amp for feeding the meter direct.

-73,

Ted
K3RTA



Re: Alternatives to Baofeng mic?

 

I have to say that when I first hooked up my new V6 Ubitx I measured power output on 40 meters using the Baofeng mic, it was around 8 watts, then I switched to the http://www.qrpkits.com/microphone.html mic and measured 10 plus watts. The first report I got told me the Baofeng mic sound clamped and tinny while the qrpkits mic sounded clear and full audio and I came up a couple of S units. I don't doubt the Baofeng mic will work just fine, but why not have the best audio you can? I now have a total of 5 of these mics and always get good audio reports. On a side note, I bought a Xiegu G1M SDR radio when they first came out, it came with the exact same Baofeng mic, after a few bad audio reports I decided to modify the mic by drilling a larger hole in the housing and changing the electret capsule, it sounded better but still not as good as the qrpkits mic, so now I just use them on all of my radios and always get good reports. FWIW.

Joel
N6ALT

Bitx40 ~ New life running FT-8 and WSPR

N6QWHAM@...
 

The uBitx V6 undoubtedly is the radio  du jour and rightly so and .after all it is the bright newest shiny toy. High marks for this latest iteration!

But if you have a Bitx40 lurking in the closet, I have three hacks to accomplish the following
  1. Provide an Alternate Controller for the Raduino
  2. Modify the Bitx40 so that USB and LSB are achieved using CLK2 on the Si5351. The on board BFO crystal is disabled
  3. Modifying the Bitx40 so that USB and LSB are achieved by shifting the LO from 5 MHz to 19 MHz with a flick of a switch. The on board BFO crystal is used for both LSB and USB
On the air tests with WSPR and FT-8 have shown both of these approaches as a viable means to get USB with a Bitx40.

Future development will look to using a tunable Transverter with the Bitx40 so it can be translated to 6 Meters. 

Documentation on what I have done can be found at http://n6qw.blogspot.com

Happy New Year!

73's
Pete N6QW

Re: Alternatives to Baofeng mic?

MVS Sarma
 

Bestvof 2020 in advance. 

You can use desktop mouse , otherwise lying idle. The leftbor ,/and right buttons can be wired for ptt.  Etc

On Tue, 31 Dec 2019, 8:13 pm howard winwood G4GPF, <winwoodh@...> wrote:
I put my kit Mike in a defunct fibre tip pen case after removing the internals ( messy!) and the PTT button on the side .
G4GPF

Re: Alternatives to Baofeng mic?

howard winwood G4GPF
 

I put my kit Mike in a defunct fibre tip pen case after removing the internals ( messy!) and the PTT button on the side .
G4GPF

Re: Alternatives to Baofeng mic?

MVS Sarma
 

Congrats. You have reasonably honored the mic element. Let it serve you well . Best of 2020 


On Tue, 31 Dec 2019, 6:19 pm Jay - WS4JM, <ws4jm@...> wrote:
I use the stock electret from the kit stuffed into an old microphone case from a defunct CB. I surrounded the electret with foam to secure it. I get good reports with it. I have also used a D104M6 with good results. The stock mic works fine if you can find a good way to mount it. YMMV.

Jay
WS4JM

Re: Alternatives to Baofeng mic?

Ashhar Farhan
 

There is a lot of myth around these mics. I have seen some hams spend a fortune on their microphones. Most of this is quite useless. Let me explain, why.
1. The audio channel of an analog radio is limited to frequencies between 300 hz and 3000 hz. The frequency response of your mic below or above this not of much use. On the other hand a podcast recorded in FLAC format, sampled at 24 bit and 96 khz will sound very different between electret mic of the ubitx and a blue condensor mic.
2. Flatness of the mic's frequency response. This too isn't of much use. The crystal filters variations will dominate any gains you have at flatenning the response. In any case, less than a db of variations are hardly going to register at the other end.
3. Distortion. Most of the times, you want your voice to be compressed and hence distorted. We use ALC to up the gain while talking softly and then push the gain down while yelling. Additionally we use clipping and compression and this leads to distorted audio. 
Save yourself the money, buy yourself something nice and better instead.

- f


On Tue 31 Dec, 2019, 6:53 PM Joel Caulkins/N6ALT, <caulktel@...> wrote:
I use this one on all my bitx's and get great audio reports.
http://www.qrpkits.com/microphone.html

Joel
N6ALT

Re: Alternatives to Baofeng mic?

 

I use this one on all my bitx's and get great audio reports.
http://www.qrpkits.com/microphone.html

Joel
N6ALT

Re: Alternatives to Baofeng mic?

Jay - WS4JM
 

I use the stock electret from the kit stuffed into an old microphone case from a defunct CB. I surrounded the electret with foam to secure it. I get good reports with it. I have also used a D104M6 with good results. The stock mic works fine if you can find a good way to mount it. YMMV.

Jay
WS4JM

Re: BFO

Ted
 

That's odd....   Setting the BFO and the CW BFO in Memory Manager does the trick fine, here.  Just be sure to include the right number of figures, chiefly zeros at the far end.  "11056000" for instance. 

Please forgive me if I'm repeating what you've already tried.  Best of luck with it.



73,

Ted
K3RTA

Re: S-Meter on Nextion Display

Ted
 

Hi, Richard.

The S-meter in the CEC NX_S software will work fine though some have added a simple audio amp (LM386, etc) between a tap from the yellow (vol pot "high") wire on the audio header to Pin 7 of the Raduino header in order to get full range from the meter.  One then uses part of the Memory Manager software (http://www.hamskey.com/2018/01/ubitx-memory-manager-program.html#more) to set the lower and upper range of the meter readings.

If you do take the time to staple in a second Nano processor into your build and blow additional firmware into this second Nano, then add a few wires, a small disc capacitor, and a pair of resistors, your S-meter will react a bit faster AND you will get some extra features that are neat to play with (and you don't need an additional audio amp to feed it).  Here's how: http://www.hamskey.com/2018/07/standalone-signal-analyzer-i2c-type_29.html#more   This is amazingly easy to do, if you don't mind soldering wires to the Nano pin positions. It certainly takes no more work or time than it does to wire in a second audio amp for feeding the meter direct.

-73,

Ted
K3RTA

 

Re: uBITX V6 heat sink temperature

bill richardson
 

My V6 at the power plug is seeing 350ma. This is more than double my V5 with the standard display. It would be nice to be able to turn off the display to save on current draw. It makes the new V6 not so portable for the folks that like to run on minimal current when portable.


On Dec 30, 2019, at 9:13 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

I believe Joel is talking about the LM7805 regulator on the Raduino.
The LM7805 is spec'd to continue working at temps as high as 150 C.

I have no idea how hot it should get on a v6 with the new display, but on the older uBitx's
the Raduino typically drew around 60ma from the 12v supply.
So about (12-5)*0.060) = 0.42 Watts dissipated as heat in the LM7805.
They figure the part rises about 19 degrees C per watt to be dissipated above the ambient air,
so 60 C does seem kind of high.  But it's not about to burn up.

Would be interesting to hear reports about how much current the Raduino on a v6 draws.

Some of the Nano's on the Raduino have been found to draw more current than others.
Some uBitx owners felt the LM7805 was way too hot, and put a heatsink on it.
The Raduino should get just as hot during receive as during transmit.

Jerry, KE7ER

On Mon, Dec 30, 2019 at 04:26 PM, Alex Netherton wrote:
Wow, when I have my SB-200 just turned on, it heats the room. When I in a long QSO, I have to open the window!

Warm finals are just a fact of life.If you are running Class B, your duty cycle is 50%, meaning that you are feeding the transistors with 20 to 25 watts, dissipating around 10 watts (or so). This will indeed heat up the heat sink, but most JFETS are rated for such temperatures. If the transistors are biased for Class AB, then you are likely putting close to 30 watts in to get 10 out.
 
Just put a hot dog on top of the finals!
Hide quoted text

 


On Fri, Dec 27, 2019 at 12:11 PM Joel Caulkins/N6ALT <caulktel@...> wrote:
Hi all,

I have my V6 all hooked up and calibrated and have checked into a few nets with my own home brew mic, the supplied one got bad reports, however I have noticed that the 5 volt regulator heat sink is running at 142 degrees F or 61.1 C. That seems hot to me. Anyone else?

Joel
N6ALT

Re: S-Meter on Nextion Display

Vic WA4THR
 

Evan is correct. You can get a nice S-meter working in the base CEC sketch by adding a small amplifier (Ian has a circuit and descriptions on his site) and feeding the aux input. I did that, it works well, and you can adjust the meter sensitivity using Memory manager. I later added the second Nano and circuit and changed to the -S sketch to get the small audio spectrum display and CW decoder, and it also changed how the S-meter signal is developed so the small amp and aux input are no longer used. The S-meter display is virtually the same in the 2 methods, although maybe a little faster in the I2C "-S" version.

=Vic=

Re: Alternatives to Baofeng mic?

iz oos
 

In my opinion all SSB transceivers benefit from audio conpressors, except for those for which the speech is already very punchy, like the excellent MFJ monobands. A compressor increases the average power but limits the microphone output to a certain level preventing also splatter. Equalization is not necessary at all as you can move the BFO to cut basses.


Il 31/dic/2019 04:09, "Curt via Groups.Io" <wb8yyy=yahoo.com@groups.io> ha scritto:
The Baofeng was introduced based upon its availability.  I perceive nothing special other than that. 

As the uBITX was intended for amateurs who may lack the means to purchase commercial equipment - a microphone element and push button was included in the kit.  This provides a hint that the electret type of microphone is intended. 

I confess I grabbed an old, no longer used Kenwood speaker microphone, replaced its connector, and found it drives the uBITX rather nicely.  Others in my local club with uBITX boards from the same batch found great difficulty getting enough drive with the electret microphones they had available.  (a few suggested audio mods are mentioned for this at our K3PZN uBITX website ...). 

Some are adding speech processor boards, based often on an analog devices IC.  While I use a processor on my main appliance rig - I don't so far see that one is essential for my uBITX. 

Try what you have available for a electret microphone.  If its works well enough, enjoy the rig.  if not - audio mods are around this website and others. 

Curt wb8yyy

PS - add-ons like the Jackal address transmit audio -- decide your own path!  I am content with a mostly stock uBITX except working to correct spurious, and now adding a variable bandwidth receive audio filter (nescaf)


BFO

John Schlosser
 

For the ubitx 5 (not the earlier versions), you will want to set the BFO somewhere around 11.055-11.056 MHz as a starting point.
How do you get to 11.055 without turning the encoder a million times? I have tried uBitix Manager.

Re: How-to Request

Jack, W8TEE
 

Most of the other processors can emulate EEPROM via their libraries.

Jack, W8TEE

On Monday, December 30, 2019, 6:11:26 PM EST, Gary Anderson <gary.ag5tx@...> wrote:


Yes. You are correct. Calibration values are stored in EEPROM. Updating HFsignals firmware will not change these settings. Ian's firmware also uses the same calibration addresses (although he has added more to the memory map)
...I fear I may have inadvertently sparked a question based on one of the posts I made today. I had ported the firmware to an ARM core that does not have EEPROM.  Sorry if this caused confusion.
Rgds,
Gary

--
Jack, W8TEE

Re: Alternatives to Baofeng mic?

Curt
 

The Baofeng was introduced based upon its availability.  I perceive nothing special other than that. 

As the uBITX was intended for amateurs who may lack the means to purchase commercial equipment - a microphone element and push button was included in the kit.  This provides a hint that the electret type of microphone is intended. 

I confess I grabbed an old, no longer used Kenwood speaker microphone, replaced its connector, and found it drives the uBITX rather nicely.  Others in my local club with uBITX boards from the same batch found great difficulty getting enough drive with the electret microphones they had available.  (a few suggested audio mods are mentioned for this at our K3PZN uBITX website ...). 

Some are adding speech processor boards, based often on an analog devices IC.  While I use a processor on my main appliance rig - I don't so far see that one is essential for my uBITX. 

Try what you have available for a electret microphone.  If its works well enough, enjoy the rig.  if not - audio mods are around this website and others. 

Curt wb8yyy

PS - add-ons like the Jackal address transmit audio -- decide your own path!  I am content with a mostly stock uBITX except working to correct spurious, and now adding a variable bandwidth receive audio filter (nescaf)

Re: S-Meter on Nextion Display

Evan Hand
 

Please verify, but I believe that the _S option is for the "Stand alone" meter function.  This uses a second Nano to do the metering as well as other functions.  An S meter using the spare analog input is included in the base CEC software.  The _S version also requires a modification to the I2C bus to connect the second Nano.

Again, I am going from memory here, so it may be incorrect.  I am sure that it is described on the Hams Key (CEC) site somewhere.  Finding information on the site can be a challenge.  I would also check ubitx.net.  Often there is better information on that site.

73
Evan
AC9TU

Re: uBITX V6 heat sink temperature

Jerry Gaffke
 

I believe Joel is talking about the LM7805 regulator on the Raduino.
The LM7805 is spec'd to continue working at temps as high as 150 C.

I have no idea how hot it should get on a v6 with the new display, but on the older uBitx's
the Raduino typically drew around 60ma from the 12v supply.
So about (12-5)*0.060) = 0.42 Watts dissipated as heat in the LM7805.
They figure the part rises about 19 degrees C per watt to be dissipated above the ambient air,
so 60 C does seem kind of high.  But it's not about to burn up.

Would be interesting to hear reports about how much current the Raduino on a v6 draws.

Some of the Nano's on the Raduino have been found to draw more current than others.
Some uBitx owners felt the LM7805 was way too hot, and put a heatsink on it.
The Raduino should get just as hot during receive as during transmit.

Jerry, KE7ER


On Mon, Dec 30, 2019 at 04:26 PM, Alex Netherton wrote:
Wow, when I have my SB-200 just turned on, it heats the room. When I in a long QSO, I have to open the window!

Warm finals are just a fact of life.If you are running Class B, your duty cycle is 50%, meaning that you are feeding the transistors with 20 to 25 watts, dissipating around 10 watts (or so). This will indeed heat up the heat sink, but most JFETS are rated for such temperatures. If the transistors are biased for Class AB, then you are likely putting close to 30 watts in to get 10 out.
 
Just put a hot dog on top of the finals!
Hide quoted text

 


On Fri, Dec 27, 2019 at 12:11 PM Joel Caulkins/N6ALT <caulktel@...> wrote:
Hi all,

I have my V6 all hooked up and calibrated and have checked into a few nets with my own home brew mic, the supplied one got bad reports, however I have noticed that the 5 volt regulator heat sink is running at 142 degrees F or 61.1 C. That seems hot to me. Anyone else?

Joel
N6ALT