I had a similar situation.? It turned out to be my mic jack was slightly loose at the case (the mounting screw was snug but not super tight).? When I plugged the mic in, I was inadvertently (and unknowingly) twisting the entire jack clockwise and it was shorting the mic wiring on the pins against the LCD display assembly.? To correct the problem I rotated the jack away from the short, tightened the mounting screw, and (for good measure) placed some electrical tape between the jack wiring and the LCD display assembly.? Not sure if this will work for you but it did the trick for me.
Tom
AB7WT
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Wow! Thanks for that information.
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We have two ubitx radios. One runs off a 20v old laptop supply. I made a linear regulator from a 317 to run the main radio at 13.7v and the finals run off of the 20v. I have engineered larger heat sinks and a ducted fan. The output transistors
don't get warm even with running continuously at full power for several minutes. Puts out about 20watts on the lower bands. This power supply fits in the radio box.
The other ubitx is powered by a 2 amp cheap chinese wall wort. It shouldn't work but does fine. Also have a Bitx40 that I generally run battery operated.?
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We have two ubitx radios. One runs off a 20v old laptop supply. I made a linear regulator from a 317 to run the main radio at 13.7v and the finals run off of the 20v. I have engineered larger heat sinks and a ducted fan. The output transistors don't get warm even with running continuously at full power for several minutes. Puts out about 20watts on the lower bands. This power supply fits in the radio box.
The other ubitx is powered by a 2 amp cheap chinese wall wort. It shouldn't work but does fine. Also have a Bitx40 that I generally run battery operated.?
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Re: JackAl System Preview
Hi Jack Please add me to the list to purchase a JackAl board. I have bought the 7" display, Teensy 3.6 and audio board etc ready for the project My paypal is keith@...great job thanks! -- Keith Baker - Communications technician (retired)
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Possibly you have ptt and ground reversed on your microphone connection, as I had same symptoms when I did. Disconnect ptt or ground to see if problem goes away.
If you are using the case from India, then check the front mounted hub board for solder bridges or poor connections.
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Hello, solder-melters,
I'm experiencing constant clicking from the raduino when my microphone is plugged in. The display indicates it is switching from RX to TX continuously. When I disconnect the microphone, it stops. If I key up the PTT, the clicking stops and I am able to transmit. I can hear myself on a receiver, so the microphone is working. As soon as I let go of PTT, the radio continues to switch between RX and TX, clicking the whole time. I have re-soldered all connections to the jack, and also the microphone in an attempt to troubleshoot, but this resulted in no change.
I wired up the key jack for a straight key. When I key CW, I hear a continuous tone behind my dits, and when I cease transmitting, the tone continuous for about a second, then the raduino clicks and the radio returns to RX.
I'm not experienced and have no idea where to start troubleshooting. I've made sure all connections are solid, but I'm starting to wonder if this is a software issue. I am running version 1.08 of KD8CEC's firmware.
Any ideas? Thanks!
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Thanks for the info. ?I know switching supplies are known for being noisy, and I don¡¯t have the test equipment to check how clean the output is. ?Appreciate the advice on your experience. ?
On Thursday, November 22, 2018, 5:05 PM, Curt via Groups.Io <wb8yyy@...> wrote: Here using an mfj1317. No performance issues. But as it is warm to the touch, I am doubting its efficiency as a switching supply. As a 30 amp rf worthy supply can be had for less than $100, curious myself on low cost options.
73 curt
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Paddles are sold... thanks for all the interest.
--
72 and God bless
KD4EPG
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Here using an mfj1317. No performance issues. But as it is warm to the touch, I am doubting its efficiency as a switching supply. As a 30 amp rf worthy supply can be had for less than $100, curious myself on low cost options.
73 curt
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Some laptop style power supplies are noisy but I have had good luck with 12 volt 30 amp switching power supplies on Amazon for under $20 with Prime.?? Now I have more than enough power to run my 70 watt Chinese amp kit too. -- Lee - N9LO? "I Void Warranties"
?
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I¡¯m sure this has been covered but I would like to know what are the favorite power supply options for the Ubitx. (12v 3a). ?No plans to be portable so either a bench top unit or something I can mount in an enclosure for the radio. ?Also with some of the other options I am seeing, maybe I will need other voltage outputs. ? Thanks!
Joel
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Re: Finally got my ubitx on the air!
I found it, a Plessey SL6270C. Thanks very very much for the schematics with the indication of the easy mod to do on the ubitx. It will make it in the next weekends.
Il 22/nov/2018 18:25, "iz oos" < and2oosiz2@...> ha scritto: Excellent! If I have the same part I will follow this schematics. That part is very military and sounds very good on air.
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Re: Ubitx working, audible tone over signals on RX
I and a relative both implemented the Nextion screen with the CEC software and have experienced the same issue.? Filtering, putting it on a seperate regulator does not solve the problem.? The only thing that has worked so far is either a totally seperate supply (common only at the ground to the display), or to run at full brightness as Geoff has stated.
Looking into separate regulator with low pass filter to see if that solves the problem.
Evan AC9TU
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Re: Finally got my ubitx on the air!
Excellent! If I have the same part I will follow this schematics. That part is very military and sounds very good on air.
Il 22/nov/2018 18:01, "barry underwood via Groups.Io" <under2b= [email protected]> ha scritto: I used the circuit straight out of the datasheet, using the 12V TX line for power and a 78l05 regulator. My circuit is attached.
Barry
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Re: Great Results with Mic Preamp
Saw that article last night. Thanks for your report on it's value to you.
On Wed, Nov 21, 2018 at 7:32 PM -0600, "Mike Lichtman via Groups.Io" <tchrme@...> wrote:
This might be old news to some but was new to me. I saw the mic preamp for using a dynamic mic with radios designed for electrets in the Hints and Kinks column of the Dec 18 QST. It is only 4 parts and is powered by the radio's voltage to the electret. I was getting voice peaks of 5 to 10 watts on 80m with the electret and with the dynamic and preamp went to 15 w. I am in CA and a station in AZ said the signal was stronger and better audio quality. I am using an inexpensive Audiotechnica dynamic mic. When I look on the panadaptor on my QRO radio, I did not see any spurs. I made it with parts from my junk box so the cost was zero and I can use it with my other QRP rigs. 73 and Happy Thanksgiving, Mike KF6KXG
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Re: Finally got my ubitx on the air!
I used the circuit straight out of the datasheet, using the 12V TX line for power and a 78l05 regulator. My circuit is attached.
Barry
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Re: Ubitx working, audible tone over signals on RX
With CEC s/w I have experienced this tone. It is generated by the circuit used to adjust the screen brightness. Click on CW Panel (bottom left of screen), click on screen brightness, I found that increasing the brightness clears the tone!! Good luck ? Geoff G3NPI ? Sent from for Windows 10 ?
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Re: Finally got my ubitx on the air!
Congrats for the nice construction, excellent case too!!!
Il 22/nov/2018 16:17, "iz oos" < and2oosiz2@...> ha scritto: Excellent for the VOGAD, you can just whisper and have QSO! I Believe I have a spare Plessey like u used, which circuit have u used? I would be pleased to replicate it!
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Re: Finally got my ubitx on the air!
Excellent for the VOGAD, you can just whisper and have QSO! I Believe I have a spare Plessey like u used, which circuit have u used? I would be pleased to replicate it!
Il 22/nov/2018 15:04, "barry underwood via Groups.Io" <under2b= [email protected]> ha scritto: Just finished building the ubitx V3 that I have had for a while (Photo attached)
I am using the KD8CEC software and the stock 2 line display.
Power chain mods completed, 14 Watts on the lower bands now, dropping to 5 Watts on 10m
The ND6T AGC and S meter were a very worthwhile addition.
I have also added a VOGAD mike preamp using the SL6270 and an old dynamic microphone from my Alinco DX70.
First few contacts on 40m have been very encouraging.
Barry, G4BUD
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Re: Good soldering Iron price
Thanks Jack,? Just ordered one
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_Dave_ AD0B
Lee
