Date   
Re: Windows Serial Port Problem

Jon Titus, KZ1G <tituskz1g@...>
 

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

Re: Finding variables in source code

Jon Titus, KZ1G <tituskz1g@...>
 

Good advice, Jack.  Thanks for sharing it.
Cheers.
--
Jon Titus, KZ1G
Herriman, UT USA

Re: RD16HHF1 power curve flattening...some

Heinz-W. Höfermann
 

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@...:

Hi everyone,

I tried to do this mod: https://ubitx.net/2018/02/16/power-amp-fix/

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.


Re: Ubitx version 4.3

p.gould1@sky.com <p.gould1@...>
 

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

Re: RD16HHF1 power curve flattening...some

Ralph Mowery
 

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: https://ubitx.net/2018/02/16/power-amp-fix/

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.


Re: 3.2in Nextion display now looks great.

Kevin Rea
 

HI Malcom,
could you tell me where you obtained the tuning knob ?

thanks,
kevin rea
k6rea

Re: Question about Nextion display and firmware

Richard E Neese
 

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

Low output Bitx40

JeffG <jeff.goodley@...>
 

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. 

Unbuilt uBITX Ver 4 and Blue Cab for uBITX for sale.

William Sallee <k6two@...>
 

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.

Re: Question about Nextion display and firmware

Bo Barry <wn4ghv@...>
 

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

Re: 3.2in Nextion display now looks great.

Malcolm
 

Re: 3.2in Nextion display now looks great.

Kevin Rea
 

Thank you Malcom.

 

Kevin

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of Malcolm
Sent: Tuesday, July 17, 2018 10:52 AM
To: BITX20@groups.io
Subject: Re: [BITX20] 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
https://m.ebay.co.uk/itm/NEW-Universal-Spinner-Knob-for-Radio-Amplifier-Alcoknob-K91182F-185345/260793832670?hash=item3cb88614de%3Ag%3AAAIAAOxyyjpRyH3x&_nkw=alcoknob&_from=R40&rt=nc&_trksid=p2055413.m4084.l1313.TR12.TRC2.A0.H0.Xalco.TRS0
Hope that helps.
Malcolm 

Help with 40MBITX ... Please!

David R. Hassall WA5DJJ
 

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
 

Re: Help with 40MBITX ... Please!

AA9GG
 

Hi Dave.....
The majority of them can be found here...    https://ubitx.net/2018/01/30/bitx40-essential-mods/


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.
www.elanengr.com
NAQCC 3123, SKCC 4628

Re: Help with 40MBITX ... Please!

AA9GG
 

On Tue, Jul 17, 2018 at 1:47 PM, Paul Mateer <paul.aa9gg@...> wrote:
Hi Dave.....
The majority of them can be found here...    https://ubitx.net/2018/01/30/bitx40-essential-mods/


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.
www.elanengr.com
NAQCC 3123, SKCC 4628



--
Paul Mateer, AA9GG
Elan Engineering Corp.
www.elanengr.com
NAQCC 3123, SKCC 4628

Re: 3.2in Nextion display now looks great.

Richard E Neese
 

you willing to try a updated version of the 3.2 interface I made a few changes to make it easier to use

Re: 3.2in Nextion display now looks great.

Kevin Rea
 

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

 

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of Richard E Neese
Sent: Tuesday, July 17, 2018 12:18 PM
To: BITX20@groups.io
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

Re: receive works great, but no trans power, #ubitx-help

Peter Parker
 

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

Gordon Gibby
 

Q 90 is exactly the one to be destroyed by a strong signal coming in from Antenna.  


*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:

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

Jerry Gaffke
 

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:  https://groups.io/g/BITX20/topic/7715656

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