I think this will work for the Ubitx...microphone
Hi guys,
I am just getting ready to build my first Ubitx.
I am going to use a Baofeng Microphone to do it.. so I bought one and took it apart..
and this is what I came up with after tracing the wires..
I am just using the microhone part of the mike, not the speaker.
I think this will work......????
Kevin Rea
K6REA
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Re: Unbuilt uBITX Ver4 and Blue Cabinet for sale.
So William, what blue cabinet are we talking about here. The amateurradiokits one?
Joel
N6ALT
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Re: The new uBITX boards are here
I made the mod to my V3 board to change C81 (near Q90) from 0.1 uF to 470pF,? this was to get more even output power across the bands as suggested by
Farhan.?
After doing this my output dropped to about 500 mW !? I was worried that I might have toasted Q90 (literally) in the process so I went back
to 0.1 uF for C81 and I am now back at the previous power levels, so obviously Q90 is still fine.??
After looking at the schematic again, it occurred to me that I either installed the wrong value cap at C81 or perhaps making this change necessitates
re-adjusting the trimmer pot RV1 ?? ?Can anyone who has successfully made this mod to their v3 board tell me if this is the case??
Thanks?
Michael VE3WMB?
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Re: Help with 40MBITX ... Please!
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Unbuilt uBITX Ver4 and Blue Cabinet for sale.
I have an Unbuilt UBITX Ver 4 with matching Blue Cabinet for sale.? I want $180 shipped via Priority Mail. Text me 619 518 2547 I just am not motivated to build another superheterdyne transceiver. Not since I discovered SDR direct Sampling.
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Re: RD16HHF1 power curve flattening...some
Did you reroute the pins on the RD16HHF!, the are in a different arrangement than the IRF510. ?The IRF510 is GDS, the?RD16HHF1 is GSD. ?Swapping the source and drain will blow the fuse like that.
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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: Question about Nextion display and firmware
Thanks,?Richard.
I will join the Facebook one.
// hiro, JJ1FXF
2018/07/17 10:16¡¢Richard E Neese < kb3vgw@...&²µ³Ù;¤Î¥á©`¥ë:
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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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Hi Jeff,
are you seeing this low output in ssb mode or in CW mode?
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Re: Windows Serial Port Problem
You can also support the Arduino group through direct contributions on the download site. I encourage everyone to make a contribution each year. See:
If they add a true symbolic debugger, I'll make an extra contribution!
Jack, W8TEE
On Tuesday, July 17, 2018, 12:32:35 PM EDT, Jon Titus, KZ1G <tituskz1g@...> wrote:
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: receive works great, but no trans power,
#ubitx-help
It the signals are strong enough to fry Q90 the mixer will soon be gone too.
The BE junction is as robust as the mixer diodes.? so whatever you are seeing
is quite strong and could even be ESD.
For ubitx (V3 or 4) a pair of back to back 1n194/4148 diodes from K3 Pin14 to ground
is the best bet as then its only there for RX and has no impact on TX.
Bitx 20 and 40 the solution is different.
Its easily done on the back of the board.
Allison
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Re: receive works great, but no trans power,
#ubitx-help
Stuff that doesn¡¯t get through the filter can fry Q 90 and never get clipped by the diode mixer.....
For example, 2 meters?
TV?
I still don¡¯t buy the distortion argument, otherwise Q90 ?would be creating exactly the same distortion. ? We haven¡¯t heard anyone complaining of that have we?
Gordon KX4Z?
On Jul 17, 2018, at 16:19, Jerry Gaffke via Groups.Io < jgaffke@...> wrote:
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Curious.
Q90 is the one that would fry if the antenna was hooked up and a nearby QRO station was operating.
Or a nearby electrical storm was operating.
Q13 of the Bitx40 often blow in this way.
The back-to-back diode fix of the Bitx40 is not such a good idea on the uBitx because
the uBitx is wideband up to the 45mhz filter, and the diodes can distort all that incoming RF.
We don't hear much about Q90 blowing on the uBitx,?
likely because the diodes in the first mixer conduct before there's real trouble.
Here's an old thread on this:??
Jerry,? ?KE7ER
On Tue, Jul 17, 2018 at 12:50 PM, Peter Parker wrote:
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.
Depends. ?What changes did you make? ?They need to be documented so I know what they are supposed to do. ?I try not to install anything in any of my radios before I understand what it does or at least is supposed to do.
You need to start creating instruction files to go along with your changes to any firmware so others can understand what you did.
Jim
Jim
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On Jul 17, 2018, at 2:17 PM, Richard E Neese < kb3vgw@...> wrote: 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.
Hi Richard,
I'm happy to try an updated version of the 3.2 interface.
Regards,?
Malcolm EI8FH?
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Re: receive works great, but no trans power,
#ubitx-help
Curious. Q90 is the one that would fry if the antenna was hooked up and a nearby QRO station was operating. Or a nearby electrical storm was operating. Q13 of the Bitx40 often blow in this way. The back-to-back diode fix of the Bitx40 is not such a good idea on the uBitx because the uBitx is wideband up to the 45mhz filter, and the diodes can distort all that incoming RF. We don't hear much about Q90 blowing on the uBitx,? likely because the diodes in the first mixer conduct before there's real trouble. Here's an old thread on this:?? /g/BITX20/topic/7715656Jerry,? ?KE7ER
On Tue, Jul 17, 2018 at 12:50 PM, Peter Parker wrote:
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: receive works great, but no trans power,
#ubitx-help
Q 90 is exactly the one to be destroyed by a strong signal coming in from Antenna. ?
Differing ideas on how to protect that have been discussed here:? /g/BITX20/topic/ubitx_front_end_overload/7558175?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,7558175
*If they are being destroyed by strong signals, that¡¯s just the diode mixer is not protecting them.
On Jul 17, 2018, at 15:50, Peter Parker < parkerp@...> wrote:
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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
|
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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Joel Caulkins/N6ALT
Don, ND6T
Jim Sheldon
AA9GG