Hi to everyone.
I bought the Ubitx and finished the ND6T rf agc and the?N6CMY copy of the Q70.
I made the UR4CRG/RX3ARG modification.?
I added the 47Ohms before the 5v Regulator and a small radiator to it.
BUT the lcd screen displays now only?the right half of the screen, the other one is completly clear. I resoldered all the board pins in case of...
I have the KD8CEC firmware in a separate arduino that i changed with the original one but no change.?
The lcd worked nicely before.
Any fix before to change it with another one please??
Very thanks for your help.
73s de CN8LI/Said.
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Re: EMI ferrites 'raduino' and 'audio' connectors
I have no doubt that for the 'audio' large connector should not have negative effects. My concern is the large raduino connector as it has the clk1,2,3 wires, ie the oscillators. In my opinion these wires should not go through the EMI ferrite brick.
Il 18/set/2018 13:38, "M Garza" < mgarza896@...> ha scritto: As I have stated multiple times, this fixed display and PTT issues for me.? I have not trimmed the wires, since I am not done tinkering.? I have not seen any negative effects, only positive.
73s,
Marco - KG5PRT?
Hi, is there any disadvantage to add emi ferrites to the large flat raduino and audio connectors?
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Re: EMI ferrites 'raduino' and 'audio' connectors
As I have stated multiple times, this fixed display and PTT issues for me.? I have not trimmed the wires, since I am not done tinkering.? I have not seen any negative effects, only positive.
73s,
Marco - KG5PRT?
Hi, is there any disadvantage to add emi ferrites to the large flat raduino and audio connectors?
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EMI ferrites 'raduino' and 'audio' connectors
Hi, is there any disadvantage to add emi ferrites to the large flat raduino and audio connectors?
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Re: JackAl System Preview
Looking very nice. Terry - KB8AMZ Brimfield Twp, OH USA EN91hd Linux User# 412308, Ubuntu User# 34905,?PCARS#78, NAQCC#6668, QRP-ARCI#8855, SKCC#14195
On Mon, Sep 17, 2018 at 8:04 PM Jack Purdum via Groups.Io <jjpurdum= [email protected]> wrote: All:
As some of you know, Al Peter (AC8GY) and I have been working on a display replacement for the ?BITX for quite some time. We have a preview video that gives an overview of the JackAl system. There are some software hiccups in the preview that should be fixed soon. We just sent Rev 4.0 off to the PCB fabricator which should be the final version of the board. All SMD's are on the board. JackAl makes use of either 5" or 7" 800x480 displays ($34-$44) using the Teensy 3.6 microcontroller ($30) and its companion audio board.($14) for the DSP. The Teensy has 1Mb of flash memory and 256K of SRAM, or which we are using less than 20% and 15%, respectively. We have also brought out a dozen "empty" pins for you to experiment with so, along with the I/O pins, there plenty of resources left to play with.
BTW, pay particular attention to the ALS Tuning it uses. It really makes it so much easier to zero in on a station. Details are in the video, but if questions remain, let us know.
Jack, W8TEE
Al, AC8GY
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Re: UBITX Q90 mod with BFR106
Thanks Glen.
Did you parallel the 220pf caps across the 22ohm emitter resistors on Q911/912?.
Nick.
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Re: UBITX Q90 mod with BFR106
I'm sorry Nick, I found a couple of 2N2222a's in an old PCB and have now fitted the next stage and tested it also. Plus I have used a different core for T8. The effect really of the 470pF / 8R2 is to make the gain rise with frequency. I have the 2N222a stage fitted and? have checked the gain, with Allison's mods and also with and without the peaking coil she added. I have to go out for a while now, but if I get a chance later, I will lift C84 and try to check as you request. Below are my results. The peaking coil fitted was 2.2uH as i don't have any 2.7uH specified.?? The effect is small though, about 0.5dB lift.? The gain from 20M to 10M is running out of steam as you can see. Tested with sig gen in at 7mVrms. Measured output of the 2N2222a stages is across the following 100R as load. No other parts fitted from next stage. glenn vk3pe 
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Re: Ubitx evolving fixes updated to wiki? #ubitx # -help
#ubitx
Here are some pictures of uBITX LPF relay area with all the parts removed for "delete/add" markup. 73 Kees K5BCQ  
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All:
As some of you know, Al Peter (AC8GY) and I have been working on a display replacement for the ?BITX for quite some time. We have a preview video that gives an overview of the JackAl system. There are some software hiccups in the preview that should be fixed soon. We just sent Rev 4.0 off to the PCB fabricator which should be the final version of the board. All SMD's are on the board. JackAl makes use of either 5" or 7" 800x480 displays ($34-$44) using the Teensy 3.6 microcontroller ($30) and its companion audio board.($14) for the DSP. The Teensy has 1Mb of flash memory and 256K of SRAM, or which we are using less than 20% and 15%, respectively. We have also brought out a dozen "empty" pins for you to experiment with so, along with the I/O pins, there plenty of resources left to play with.
BTW, pay particular attention to the ALS Tuning it uses. It really makes it so much easier to zero in on a station. Details are in the video, but if questions remain, let us know.
Jack, W8TEE
Al, AC8GY
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Re: UBITX Q90 mod with BFR106
On Tue, Sep 18, 2018 at 08:09 AM, Glenn wrote:
C81 = 470pF, R83 = 8R2.
Hi Glen, when i changed my radio to the BFR i noiced that the gain was down quiet a lot in the lower freq, so i put these 2 back to origional spec. Can you test this stage too with origional C81 and R83. Man, I so want to get a SA with tracking generator... looks like you guys are having so much fun! 73 Nick.
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Allision
?
Good day to you. I've been monitoring these discussions since they started trying to get my head round all the implications, just keeping my head down,?
I've now put my tin hat on.
?
From the start you commented about the gain distribution and that the second mixer was overdriven, I've been trying to get my mind around the required
signal levels. You mentioned that increasing the audio improved the carrier suppression but are now using an external modulator and separate oscillator,??
Can I run some signal possible levels by you, from the reading I've been doing it seems to be recommended that the other signal level into the DBM is no?
more than 10db below the oscillator injection level. Using that figure and working the levels both ways from the 12MHz to 45MHz mixer gives these results.
Signal Levels
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?RMS
? ? ? ? ? ? ? ? ?dBm? Voltage? Power
Audio? to Mod Max = -6? ? ?-3? ? 0.158? ? ?0.0005? W? Signal
12MHz OSC? ? ? ? ? ? ? ? ? ? ? ? 4? ? ?0.354? ? 0.0025? W? OSC
?
Modulator O/P? Loss = -6? ? -2? ? 0.178? ? 0.00063 W? Signal
12Mhz TLA? ? ? ?Gain? ? ?0? ? -2? ? 0.178? ? 0.00063 W? Signal
12MHz Filter? ? ?Loss? ? -6? ? -8? ? 0.089? ? 0.00016 W? Signal
?
57MHz OSC? ? Input? ? ? ? ? ? 4? ? ?0.354? ? 0.0025? ?W? OSC
1st Mixer I/P? ? ?Max = -6? ? ?-8? ? 0.089? ? 0.00016 W? Signal
1st Mixer O/P ?Loss? -6? ? ?-14? ?0.045? ? 0.00004 W? Signal
45MHZ Filter? ? Loss? -6? ? ?-20? ?0.0224? ?0.00001 W? Signal
45MHz TLA ?Gain? 12? ? ?-8? ? 0.089? ? 0.00016 W? Signal
?
Final OSC? ? ? ?Input? ? ? ? ? ? ?4? ? 0.354? ? 0.0025? W? ?OSC
2nd Mixer I/P? ?Max = -6? ? ?-8 ? 0.089? ? 0.00016 W? Signal
2nd Mixer O/P Loss? -6? ? ?-14? ? 0.045? ?0.00004 W? Signal
?
Amp ? ? ? ? ? ? ? ? Gain? 17? ? ? ?3? ? 0.316? ? 0.002? ? W? Signal
Attenuator? ? ? ?Loss? -2? ? ? ? 1? ? 0.251? ?0.00126 W? Signal
Pre Driver? ? ? ?Gain? 14? ? ? 15? ? 1.26? ? ?0.032? ? ?W? Signal
Driver? ? ? ? ? ? ? Gain? 13? ? ? 28? ? 5.62? ? ?0.631? ? W? Signal
PA? ? ? ? ? ? ? ? ? ?Gain? 12? ? ? 40? ? 22.4? ? ? ?10? ? ? ?W? Signal
?
?
If these figure are anyway near correct it would seem that the 12MHz TIA could be bypassed completely if the audio level is raised some..
?
Obviously the work around the filters and leveling the gain of the driver and output stages will also need to be done.? Just incase the table get corrupted I've attached it in picture form.
Regards??
David G8DJM
?
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Re: Ubitx evolving fixes updated to wiki? #ubitx # -help
#ubitx
i Tim, I believe Alyson has already cut up her board and can¡¯t really help you.
To a point I have.? That whole corner with relays was separated from the
rest to evaluate ground loops and layout.? However I have enough info
on the wiki and pictures as well.
I can also still answer questions on that so I can fill in what may be missing for some.
Allison
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Re: Right-sided relay harmonic attempted fix for v3/4 ubitx
Great!
For the fellow who sent me the mail order money order, thanks for the extra dollars, and we mailed your board on Friday. ?
I may gather my strength and order some more boards tomorrow
Gordon
toggle quoted message
Show quoted text
Hello Gordon,?
I received your LPF daughter boards today. They look great and will start working on your mod in the near future. I will let you all know how it works out.
Ripley
KD8UYQ
The words are mine but this iPad does what it will with them.
On Sep 12, 2018, at 11:56 AM, Gordon Gibby < ggibby@...> wrote:
All of the recent orders of 25 boards have now been mailed. If I do this again I¡¯ll be a little smarter, and list them as order of one, or order of ?pair of 2; ?I was able to find enough dollar bills to help out the people who bought more than one with
a bit of a refund, but that was a pain.
I improved the inside paper to have a repeat of some of the important information, links, etc
I¡¯ll mark them on eBay as shipped soon. ?I got to see the special stamp as mentioned by Kees I think
<image1.jpeg>
On Sep 11, 2018, at 16:28, Gordon Gibby < ggibby@...> wrote:
Well... now ALL of them are sold.? ?Glad I counted them this morning in the car and they seem to all BE THERE.? ?I'll work on envelopes tomorrow morning and hopefully get them ALL in the mail.? ?
Then maybe order some more.
As folks BUILD this little mod, can you indicate how you installed it,? what the problems or tricks you discovered?? ? i sure hope people can figure out how to do it --- be sure to use the correct relay because these relays DO SEEM TO BE POLARIZED --- Maybe
pay some attention that your relays actuall do work when installed!? ?If you flip a relay to the other side of the board --- YOU CHANGED THE ORIENTATION of the voltage applied to the coil --- and as I discovered the hard way, doing it incorrectly means they
won't operate!? ??
Cheers,
gordon
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New List of Ubitx resources
New list of ubitx sources. Added Allen Merrell KB4UD's 3.2 and 3.5 TFT's and?
HMI's for enchanced and basic Nextion
?
N5KBP
?
?
Latest Dr. Ian Lee KD8CEC's firmware?
Raduino Source & Hex, MM EXE & HMI's for Nextion
https://github.com/phdlee/ubitx/releases/tag/1.1
?
Hex for I2C dspmeter
https://drive.google.com/file/d/1Oc-bGS34f0ragGXQ1lK6HHB7GhZLHZrP/view
?
Source for I2C dspmeter
https://github.com/phdlee/dspmeterv1
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Rich Neese KB3VGW's Custom Nextion Screens from 2.4 to 7.0 inch. TFT's and HMI's
https://www.mediafire.com/folder/mmu6ua683lk93/Nextion-Screen-1097
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BJ Pasteuning PD5DJ's 4.3 custom version. TFT only for 4.3 Nextion.
http://ubitx.net/2018/07/23/2831/
?
Allen Merrell KB4UD's 3.2 and 3.5 TFT's and HMI's for enchanced and basic Nextion
/g/BITX20/files/3.2%20&%203.5%20for%20Nextion%20and%20CEC%201.095
-- N5KBP
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That's the same case i used, its a very nice sturdy case.
/g/BITX20/photo/0/1768?p=Created,,,20,2,1760,0
Joel
N6ALT
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Re: Right-sided relay harmonic attempted fix for v3/4 ubitx
Hello Gordon,?
I received your LPF daughter boards today. They look great and will start working on your mod in the near future. I will let you all know how it works out.
Ripley KD8UYQ The words are mine but this iPad does what it will with them.
toggle quoted message
Show quoted text
On Sep 12, 2018, at 11:56 AM, Gordon Gibby < ggibby@...> wrote:
All of the recent orders of 25 boards have now been mailed. If I do this again I¡¯ll be a little smarter, and list them as order of one, or order of ?pair of 2; ?I was able to find enough dollar bills to help out the people who bought more than one with
a bit of a refund, but that was a pain.
I improved the inside paper to have a repeat of some of the important information, links, etc
I¡¯ll mark them on eBay as shipped soon. ?I got to see the special stamp as mentioned by Kees I think
<image1.jpeg>
On Sep 11, 2018, at 16:28, Gordon Gibby < ggibby@...> wrote:
Well... now ALL of them are sold.? ?Glad I counted them this morning in the car and they seem to all BE THERE.? ?I'll work on envelopes tomorrow morning and hopefully get them ALL in the mail.? ?
Then maybe order some more.
As folks BUILD this little mod, can you indicate how you installed it,? what the problems or tricks you discovered?? ? i sure hope people can figure out how to do it --- be sure to use the correct relay because these relays DO SEEM TO BE POLARIZED --- Maybe
pay some attention that your relays actuall do work when installed!? ?If you flip a relay to the other side of the board --- YOU CHANGED THE ORIENTATION of the voltage applied to the coil --- and as I discovered the hard way, doing it incorrectly means they
won't operate!? ??
Cheers,
gordon
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Startied using uBit-x-Happy-Happy
I got my uBitx a few month ago, but only made 1 or 2 contacts as I was busy building stuff. Then I got really interested with Dr. Ian's Nextion screen mod.
SO I downloaded 1.097 firmware and added a 2.4 Nextion touch screen and WOW.
Having lots of fun learning the screen while making 1500 mile contacts? (central fl. to amarillo TX ,R.I , New Jersey, etc. The guys at our club got excited about this conversion.
Thanks Dr. Ian. and Fahran? I still have a lot of mods/ ie signal display etc.
Andy KM4TRT
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Hi Thomas:
I have a Raduino for the BitX40 excess to my needs, $20.00 and some S&H to your QTH. If you want I can program it for whatever version you. Let me know
73 Ross Bell, K7RSB
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Re: UBITX Q90 mod with BFR106
Some basic testing of Q90 stage only. I made up a quick proto PCB with the PA stages in a 'straight' line.? Loaded Q90 stages only using the BFR106 device. I used a BN43-2402 core for T8 with 4 turns bifilar 0.25mm wire. Allison's mods....R81 = 2k7 (gave exactly 12mA for the stage). C81 = 470pF, R83 = 8R2. Tested with 12v supply. 7mV rms (~-30dBm) from HP8640 sig gen, RV1 at max and measured out with scope. Now waiting for 2N2222A's to arrive to test next stage.? Meanwhile, lots of 'through-holes' to solder in. 
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Terry Morris
Nick VK4PP
Joel Caulkins/N6ALT
Ripley
