Re: receive works great, but no trans power,
#ubitx-help
This fix may be helpful to someone.?
* Symptom: Low then almost no transmit power.? Power meter might move up to about 1w for a short time then drop down to very low.? Tx signal audible in local receiver but weaker than it should be.? PA transistor bias settings seem to be OK, indicating the IRF510s are OK.?
* Probing around with an RF probe indicated the burst from higher to low power was noticed on the PA transistor drain and back through the driver stage.?
* DC voltage check found all were OK except the emitter of Q90. Instead of 3 volts there was only 0.9v.?
* Q90 was removed and replaced with leaded transistor (I used a BC548 which is similar to a 2N3904).? Used adjacent parts to solder leads to for better spacing.??
Q90 turned out to be the problem.? With the new transistor the emitter voltage reads normal and the rig now transmits.?
73, Peter VK3YE
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Re: 3.2in Nextion display now looks great.
HI Richard, I will be building my ubitx in the next few days and I already have the Nextion 3.2e to install in it¡ I would try your code. ? Kevin rea Lancaster, calif. K6rea ? ?
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From: [email protected] <[email protected]> On Behalf Of Richard E Neese
Sent: Tuesday, July 17, 2018 12:18 PM
To: [email protected]
Subject: Re: [BITX20] 3.2in Nextion display now looks great. ? you willing to try a updated version of the 3.2 interface I made a few changes to make it easier to use
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Re: 3.2in Nextion display now looks great.
you willing to try a updated version of the 3.2 interface I made a few changes to make it easier to use
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Re: Help with 40MBITX ... Please!
Also check these sites:
?
?
? ??
and the FaceBook Group....?????
On Tue, Jul 17, 2018 at 1:47 PM, Paul Mateer <paul.aa9gg@...> wrote: Hi Dave..... The majority of them can be found here...???
-- Paul Mateer, AA9GG
Elan Engineering Corp.
NAQCC 3123, SKCC 4628
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Re: Help with 40MBITX ... Please!
Hi Dave..... The majority of them can be found here...???
On Tue, Jul 17, 2018 at 1:15 PM, David R. Hassall WA5DJJ <dhassall@...> wrote: Dear Members,
I got caught up in the frenzy of building a 40MBITX when they first came out.? I bought the kit and proceeded to get it going. mounted it on a test board and started wiring it up.?? I got distracted by Jack's controller so I built one of them and I even had it lit off but not yet connected it up.?? There have been a number of updates that have occurred and I really don't know how many and what I installed.??Then LIFE got in the way and it went on the shelf to await some time when I would be free enough to finish the 40MBTX KIT.?? That time is not quite here yet but I tried to start getting the information and the software versions together from this website.?? I am sorry but it is almost task impossible.?? Has there been someone here that has managed to rat hole the 40MBITX information for those of us who have missed a year or two of the ongoing development so we can get back in??? Is there a link to that information some where?? or can someone tell me?how to?get back into the fray and get my?40BITX?finished and up and running with some of the desirable modifications that make the radio really useful on 40M???
Any suggestions would be very helpful.?? I am sorry I have been dormant so long, but it?couldn't be helped.?
Thank you and take care and have fun.?
Dave WA5DJJ
?
-- Paul Mateer, AA9GG
Elan Engineering Corp.
NAQCC 3123, SKCC 4628
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Help with 40MBITX ... Please!
Dear Members,
I got caught up in the frenzy of building a 40MBITX when they first came out.? I bought the kit and proceeded to get it going. mounted it on a test board and started wiring it up.?? I got distracted by Jack's controller so I built one of them and I even had it lit off but not yet connected it up.?? There have been a number of updates that have occurred and I really don't know how many and what I installed.??Then LIFE got in the way and it went on the shelf to await some time when I would be free enough to finish the 40MBTX KIT.?? That time is not quite here yet but I tried to start getting the information and the software versions together from this website.?? I am sorry but it is almost task impossible.?? Has there been someone here that has managed to rat hole the 40MBITX information for those of us who have missed a year or two of the ongoing development so we can get back in??? Is there a link to that information some where?? or can someone tell me?how to?get back into the fray and get my?40BITX?finished and up and running with some of the desirable modifications that make the radio really useful on 40M???
Any suggestions would be very helpful.?? I am sorry I have been dormant so long, but it?couldn't be helped.?
Thank you and take care and have fun.?
Dave WA5DJJ
?
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Re: 3.2in Nextion display now looks great.
Carlo and Kevin,
I bought the tuning knob ( well I bought 3 of them? !!) from this ebay seller
Hope that helps.
Malcolm?
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Re: Question about Nextion display and firmware
Jacques,
Thinking about your idea again. Do you want to use the 2560 in place of the nano?
I looked at the schematics and it looks like it should be a 18 line connection to the corresponding pins in the 2560. Of course the 6 for the LCD display would not be needed.
I have spare 2560s and a 5" Nextion and may try to hook them up.
I don't see any advantage, except for the additional input/output and serial lines that would be available.
I haven't come up with a use for them (yet).
Let me know if that is what you want to do and I will hook mine up and give it a try.
73. Bo W4GHV since '54
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Unbuilt uBITX Ver 4 and Blue Cab for uBITX for sale.
I have the uBITS Ver 4 and matching Blue Cabinet, unbuilt, for sale. Since I started using SDR, I just can't get inthused with a Heteradyne based radio. A friend of mine talked me into buying it, which I did, but as I look at the beautifully implemented PC board and components, I just can't bring myself to start soldering on something Super Heteradyne.? So I want $180 shipped. You will receive the unbuilt uBITX Ver 4, with matching Blue Cabinet. I will take PayPal for payment and I'll ship Priority Mail My email address is k6two@... ? Thank you. Bill K6TWO SINCE 1956.
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I know this has been around the block a few times, but we need some help.
My BitX40 receives beautifully across the band but we have next to no output power on transmit. ?To get anything above 500mW both pots have to be wound fully up. ?What can we do to get up to the 5+ Watts we should get out of this rig?
Jeff
G6EXF.?
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Re: Question about Nextion display and firmware
if you join the facebook page ubitx you will get alot of info and the 1.095 is released a cw bug has been patched
I have done alot of work on the tft/hmi files 2.4-3.5
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Re: 3.2in Nextion display now looks great.
HI Malcom,
could you tell me where you obtained the tuning knob ?
thanks,
kevin rea
k6rea
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Re: RD16HHF1 power curve flattening...some
I did this basic mod and it works fine for me.??
Try pulling the power plug going to the board.? There are 3 wires, one ground and 2 hot wires.? One of the hot wires goes directly to the finals and the other wire goes to everything else.? Disconnect the wire going to the finals and see if the fuse still blows.? If not, it could be fake parts , miswiring, or maybe you have shorted the cross over wires on the final.? I bought my finals from RF? parts.?
One other thought, did you cut the drive pot back? and rebias the finals with the other two pots ?? You may be driving it to more output or maybe the bias is set wrong.
de ku4pt
On Tue, Jul 17, 2018 at 12:30 PM, <fr.beckenbauer@...> wrote: Hi everyone,
I tried to do this mod:?
I checked everything for shorts, and a multimeter connected to the power input shows typical capacitor behaviour. However, when I connect power, my 3A fuse instantly pops. Is it possible that fake RD16HHF1 are causing this? I'm kinda desperate.
 
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Thanks for that dave! Hope you are all ok down there!! I will probably give you a bell when I get around to the download. I'm a complete nugget when it comes to PCs etc. regards....Paul
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Re: RD16HHF1 power curve flattening...some
I can say from the pic that the
"RD16HHF1" are fakes! Had my share of buying those fake stuff.
Hannes, DL4AAJ  ?
Am 17.07.2018 um 18:30 schrieb fr.beckenbauer@...:
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Hi everyone,
I tried to do this mod:?
I checked everything for shorts, and a multimeter connected to the
power input shows typical capacitor behaviour. However, when I
connect power, my 3A fuse instantly pops. Is it possible that fake
RD16HHF1 are causing this? I'm kinda desperate.
 
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Re: Finding variables in source code
Good advice, Jack.? Thanks for sharing it.
Cheers.
--
Jon Titus, KZ1G
Herriman, UT USA
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Re: Windows Serial Port Problem
The clone boards are counterfeit when they use the "plus-minus infinity" trademark that Arduino.CC owns.? This has nothing to do with open-source.? Anyone can use open-source code, designs, etc.? But when someone steals a company's trademark and uses it on a product of their own, open source or not, they create a counterfeit.? Cheap watches from Hong Kong, marked "Rolex," for example.
Dictionary:? "Counterfeit: made in exact imitation of something valuable or important with the intention to deceive or defraud."? By applying the Arduino trademark, they create a counterfeit.? So someone buys a board with the copied Arduino trademark and thinks it's a genuine Arduino.cc device.? If it fails or has problems, it tarnishes the reputation of Arduino.? Clone manufacturers could avoid the counterfeit label if they simply mark boards "Arduino Compatible."? And not use the Arduino trademark.
Arduino.cc calls such products counterfeit, and that's good enough for me.? I buy genuine Arduino.cc boards and support the group's efforts.? Others can buy and use whatever they want.? 'Nuf said.
--
Jon Titus, KZ1G
Herriman, UT USA
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Re: RD16HHF1 power curve flattening...some
Hi everyone, I tried to do this mod:? I checked everything for shorts, and a multimeter connected to the power input shows typical capacitor behaviour. However, when I connect power, my 3A fuse instantly pops. Is it possible that fake RD16HHF1 are causing this? I'm kinda desperate.  
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Received what I believe is Version 1 of mBITX in January 2018. Built unit and it worked fine until the TDA2822 audio amp smoked and burned. Replaced TDA2822 and know that it is inserted and soldered properly into the board. Now there is no audio. What happened? In soldering the audio amp in place did I somehow damage adjacent circuitry?
Richard Sweitzer - KK4BLF
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AA9GG