I purchased and wired up the power mic that was mentioned in this thread /g/BITX20/message/79613?p=,,,20,0,0,0::relevance,,procom,20,2,0,71576826.? Starting a new thread specifically about this microphone. Those who are using this microphone successfully, what level are you setting it at?? Setting mine around 4 or a little less doesn't seem to move the needle at all - same as the Baofeng mic.? Setting it higher than 4 seems to cause the radio to get stuck in TX and sometimes does a bunch of clicking.? I posted a video on another thread of my radio doing this and it was suggested that it may be common-mode current.? I changed my antenna setup and tried again.? I didn't notice "Fast Tune" blinking as it was before, but it still got stuck in TX once.? If I switch to CW and key the mic in order to check my SWR, it comes back good, below 1.5 on 20m.? Switch it back to ssb and key the mic gives me no needle movement unless I turn up the mic and then it gets stuck in TX.? Can't guarantee that is the pattern yet, but that's what I saw on my last test. I'm trying to chase down where my problem is, so knowing what is working for other users of this microphone might help me rule it out. -- Mark, kb9woo Milwaukee, WI uBITX v6
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FYI I used an LM2596 dc to dc converter to drop the 13.8 vdc from P1 to 5vdc to feed my TDA 2030a audio amp, my SSM 2167 mic preamp/compressor and theRaduino ?board. I bent the raduino1 pin 4 up so it doesn¡¯t set into the socket thus isolating the 13.8 supply from the raduino board. seems to work well. -- ?
73
Mick VA3EPM?
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Date for publishing Microcontroller Projects for Amateur Radio
All:
A number of you have asked me to post a release date for our Projects book. I just found out that the ARRL plans to start selling our book Microcontroller Projects for Amateur Radio around Sept 15. I do not have a price yet, as they still have some typesetting to do before they have a final page count.
-- Jack, W8TEE
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Check the pinout on . the tip is audio, the ring is ptt and the shield is ground. We followed this so that regular audio cables can be directly used between a pc and the speaker/mic of ubitx. About the mic, we know that the mic supplied with ubitx is not the best.? We were originally providing and electretic and builders had to solder up their own mic and ptt. Many found it challenging. We found that the baofeng mics were quiet inexpensive and decided to bundle them to get something to start with. I just checked, an elecraft mic costs 60 dollars with shipping. You could have bought a whole bitx40 with that (if it were in sale). The included mic is reasonably good. That said, the mic do not make much of a difference. Most od the distortion is caused in the PA circuits and the passband, highs and lows are determined by crystal filter. Possibly, in a low distortion transmitter like the microT2 this would make a difference, not for regular, crystal filter or SDR radios. - f
I bought a Btec microphone that has 2 jacks. How can I use this with the uBitx v6??
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If you add the resistor and heatsink, then you should not have any issues.
73
Evan
AC9TU
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I bought a Btec microphone that has 2 jacks. How can I use this with the uBitx v6??
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Thanks Evan, below is the specs of the 7805 I am using, and yes adding the resistor is a very good idea here!
... that said I ordered a 78T05 as well, which wold be a slightly superior option.
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Re: Ubitx v6.1 cat control
Hi,
It may help avoid QRMing a QSO in progress if we can hear those. With the digital modes we can *see* on the waterfall or in the spectral display where other QSOs may be. Even if they are too weak to hear. It also helps that these newfangled modes are all piled up together in a small section of the dial. I am a CW guy with maybe a little RTTY thrown in. I can use the sound as well as the waterfall to help find other signals. I they are digital signals I have a switch to turn the sound *off*. I also sometimes can hear other signals that do not show on the waterfall or spectral display. Not having the sound available is depriving you a tool that can help you be a good neighbor.
73,
Bill KU8H
bark less - wag more
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On 7/2/20 9:39 AM, Dean Souleles wrote: Barry -
I re-read your question and I may have misunderstood what you are asking.? Are you saying you want to be able to hear the FT8 signals as well as send them to the computer?? If so, then yes, a Y connector / splitter should work.
For my part - the last thing I want to hear is the digital signals!
Dean
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Re: Ubitx v6.1 cat control
Barry -?
I re-read your question and I may have misunderstood what you are asking.? Are you saying you want to be able to hear the FT8 signals as well as send them to the computer?? If so, then yes, a Y connector / splitter should work.
For my part - the last thing I want to hear is the digital signals!
Dean
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Re: Ubitx v6.1 cat control
Barry -?
You don't need anything fancy.?
If your computer has a headphone and mic outputs you take the headphone out from the computer and connect it directly to the mic input of uBitX.? ?Then take the headphone output of the uBitX and connect it to the mic input of your computer.? ?Just watch the levels - both volume out on the uBitx and speaker volume on the PC so that you don't over-drive either one.? In WSJTX settings you select the microphone input and and headphone output.? ?If you don't have the correct jacks on the PC you can get an inexpensive sound card usb dongle with mic and phone jack -
?
73,
Dean
KK4DAS
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Peter,
As long as you add a heatsink to the onboard regulator, it should be good.? Adding a 2 ohm 5 watt resistor in series with the input to the supply would remove 4.5 watts of dissipation from the regulator at full current, and still keep the input above minimum with a supply voltage of 11 volts.??With 13.8 volt supply, the regulator would need to dissipate 1.5 amps * (13.8 - 3 - 5) volts = 8.7 watts.
All of the above assumes that you are drawing the full 1.5 amps.? If a less current draw, the power dissipations go down for all devices.? It also assumes data as defined in an LM7805 from Texas Instruments in the Mouser catalog.
FWIW
73
Evan
AC9TU
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Re: Transmit Output Power (CW)
#v5
Thanks Barry, exactly the feedback I was looking for, I'll let you all know how I get on !!
Best regards, Peter.
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I have a 1.5A 7805 so in theory I should be able to replace the one on the raduino with this and have enough power for the 5" Nextion, shouldn't be a need to mount it on the rear panel ?
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Yes inkits.in is offline.?
Indian hams need to email us for any order.
Thanks
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Re: Ubitx v6.1 cat control
Look up VAC (Virtual Audio Cable).? There is a free version that allows output to both the speakers and the USB dongle that you would use to connect audio to the uBITX.? It acts like a Y cable in software.? I used it to connect WSJT-X to a Quisk that was linked to a Hermes Light 2 (HL2) SDR radio.?
Just an idea to try.
73
Evan
AC9TU
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Re: Ubitx v6.1 cat control
Question on ubitx audio via cat. This is going to sound stupid but how do you get audio out from the computer when running ft5 or wspr? I have messed with this and I can not get the computer to output sound from the radio. I am thinking that I need to put a Y? or splitter cable between the computer and radio ...then drive both a speaker and computer input at the same time. Barry
On Wed, Jul 1, 2020, 3:25 PM Michael Golden < pldnmayor@...> wrote:
Evan hand, success!!! Thank you, that worked like a charm!
Get
I'm running R1.5.0, and it works on WSJT-X no problem for me. Here's a screenshot of my settings:
![]()
I've also used R1.5.0 with fldigi. I've attached the XML file (FT-817.xml) to this message, and here's a screenshot of my settings:
![]()
Your COM ports may vary, but with these settings, I'm able to use both programs via CAT. Here's a short video of me demonstrating that I can control the radio from each program, as well as have changes on the radio reflected on the programs:
Reed
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Re: Transmit Output Power (CW)
#v5
Peter, I had to look at my notes on the two driver transistors as to why I did not change them. It was not because of extra heating it was because I was looking for a constant output on all bands or as close to constant output. Changing them to 11 ohms gave me much more output then what I was aiming for plus more heat on those devices.? So, yes change the driver and predriver emitter resistors to 11 ohms. You will need to put hats on those transistors as they will get hot... I have a homebrew amp that I drive with the ubitx and can not exceed 3 watts input. That is the reason I did not change those driver emitter resistors. Barry
Peter, I left the 22 ohm resistors in. I did not double up the smd emitter resistors for the two drivers. I changed the predriver emitter to 8.6 ohms.? Q90, I did not mess with. When I doubled up the emitter resistors for the two drivers, I had more heating on those devices and little gain in output. Your experience might be different but it is worth the effort, in my opinion, to change out those 3904 transistors.?
Thanks for the response Barry, much appreciated. I order some of ebay uk today, I got 5 for around 12 GBP so not too bad.
This definitely looks like a worthwhile mod on the v6, can you provide any more detail around exactly what you changed along with the removing the 3904 and dropping in the 2n5109. Did you change the resistor values in a similar manner to what was done for the 2n2222 swap ? Did you touch Q90 ?
The basic principal is to remove Q911 and replace Q912 and similarly remove Q92, Q97 and replace Q93, Q96, correct ?
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Re: Transmit Output Power (CW)
#v5
Peter, I left the 22 ohm resistors in. I did not double up the smd emitter resistors for the two drivers. I changed the predriver emitter to 8.6 ohms.? Q90, I did not mess with. When I doubled up the emitter resistors for the two drivers, I had more heating on those devices and little gain in output. Your experience might be different but it is worth the effort, in my opinion, to change out those 3904 transistors.?
Thanks for the response Barry, much appreciated. I order some of ebay uk today, I got 5 for around 12 GBP so not too bad.
This definitely looks like a worthwhile mod on the v6, can you provide any more detail around exactly what you changed along with the removing the 3904 and dropping in the 2n5109. Did you change the resistor values in a similar manner to what was done for the 2n2222 swap ? Did you touch Q90 ?
The basic principal is to remove Q911 and replace Q912 and similarly remove Q92, Q97 and replace Q93, Q96, correct ?
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Re: Transmit Output Power (CW)
#v5
Thanks for the response Barry, much appreciated. I order some of ebay uk today, I got 5 for around 12 GBP so not too bad.
This definitely looks like a worthwhile mod on the v6, can you provide any more detail around exactly what you changed along with the removing the 3904 and dropping in the 2n5109. Did you change the resistor values in a similar manner to what was done for the 2n2222 swap ? Did you touch Q90 ?
The basic principal is to remove Q911 and replace Q912 and similarly remove Q92, Q97 and replace Q93, Q96, correct ?
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Mick
Sunil Lakhani