Date   

Re: Remote Encoder and Function Button #ubitx

El Calvo
 

Thanks for the advise. The ferrites eliminated the noise.

Still I'm looking for ways to implement a remote vfo encoder. Using rigctl I managed to do ptt. Will try to do the vfo by reading the frequency and adding or subtract a fixed step. Don't know if there is a way to read the freq step from cat.
Right now I'm not using the ptt vfo because remotetrx manage the ptt but the rigctld still works. Unless I find another way to talk to the raduino.

Yesterday I tested my setup on 80m and received good reports. So at least is working.

WP3DN

On Oct 3, 2018 10:40 PM, "Tom, wb6b" <wb6b@...> wrote:
Hi,

I control my uBITX with CAT from a RaspberryPi. To eliminate the noise I wrap the USB cable (as well as some others) several turns through a toroid core.
http://palomar-engineers.com/rfi-kits/miscellaneous-rfi-solutions/wall-wart-rfi-filter-kit/Wall-Wart-RFI-Noise-Filter-Pack-5-filters-p76744732

Don't know what the actual ferrite material type is, but probably is mix 75 or 77.

Also, I installed my RPi into a metal case.
https://www.amazon.com/gp/product/B0755S5J3G

There are libraries to control the GPIO ports on the RPi. There is at least one for Python and there is an interesting one that is similar to the Wire library for the Arduino. http://wiringpi.com

You could write code to output emulated quadrature encoder square waves and feed them to the Arduino from the Pi instead of the physical rotary encoder. That may be more than you are intending to do. But, if you are into software hacking it could be a solution.

Tom, wb6b


Re: uBitx First Contact

Skip Davis
 

Hi Daniel
Yes both RV2 and RV3 are 10k and they are also in parallel so to start with you will only measure half that if both wipers were set at the ground end.

Skip Davis, NC9O 

On Oct 8, 2018, at 12:51, Daniel <gonewiththeego@...> wrote:

Thanks a lot for the informations about setting the PA bias. That helps a lot since all the informations about setting the bias are taking in consideration measuring the current drawn by the whole board, from the power source. I never thought about measuring the current only in the PA unit. That's awesome to discover./// And about people who worked in producing the uBitx, people which are working in a different economy system, I didn't wanted to be mean or cruel. I just wanted to point this situation as it is. I DO respect what they accomplished and I DO enjoy playing with the board. /// And one more thing about RV2 and RV3. In the schematic are rated at 10K, each. It's true that I did not disconnect them from the board but I measured them individually and they are 2.1 kilo each, and I'm sure that I didn't measured middle pin, the wiper. Not 10k but 2.1k.


Re: Harmonics and Relay Replacement

Howard Fidel
 

Mike:
That is a great find! It means the capacitance is lower on those relays.

Howard

On 10/8/2018 4:22 PM, Mike Doty via Groups.Io wrote:
Thanks Jack.  I wish I could say that I discovered this intentionally but, to be honest, it was completely accidental.  I had removed the original relays from my first uBiTX while looking for a solution to the harmonics issue.  In doing so, I broke a pin on one of the original relays.  I had some of the Axicom relays in the junk box so I ended up sticking those in as replacements for all 5 of the relays.  When I put things back together and looked at the output I saw that the harmonics were all down below -50dB.  I still had 4 of the Axicom relays left in the junk box so I replaced the 4 relays on my second Ver 3 rig, leaving K1 in place.  I saw the same results.  To be sure that there wasn't something else involved before posting to the group, I ordered more relays and replaced the same 4 relays in my Ver 4 uBiTX.  Again, the same results.  I've attached pictures of the spectrum analyzer results for both of my Ver 3 rigs so you can see that it wasn't just coincidental. Unfortunately I didn't take pictures of the other two rigs before replacing the relays but they both originally had harmonics around -35dB before the relay swaps.  All of the spectrum analyzer results for each rig shown are on 40 meters at 10 watts with the SA span from 1 MHz to 100MHz but I cannot see any harmonics above -50dB on any band, 80 - 10. 
--73-- Mike



Re: I captured my own PSK31 signal and it is not a pretty picture #ubitx-help #filters

John Smith
 

Your receiver is too close to your transmitter and you are overloading it. It's the same thing with testing your voice signal with a local receiver and it doesn't sound right. Use a remote station like WebSDR to sample your PSK31 signal and consider turning down the audio input to your digital interface. Overloading the MIC input of your uBITX audio amplifier can result in a overmodulated signal like that too. If it looks fine on WebSDR then the audio input volume is fine, but full blast is usually too much.


Re: Harmonics and Relay Replacement

Kees T
 

I measured about 2pF across the N/O and N/C contacts (when open) and about 4-5pF from the relay armature to the coil, just like the datasheet mentions for that relay. The relays I tested were the same type "16 pin" relay of various brands, who knows who actually manufactured them. 

A drop of 15dB is surprisingly high for one brand. Since you measured that LPF on 40m, what do other bands show ?

I would set the RBW to 100KHz or 300KHz

73 Kees K5BCQ 


Re: uBitx Software Update

Bill Cromwell
 

Hi Jens,

"I told you so"! I told you it's so easy that even *I* could do it :) I'm glad you got it done.

73,

Bill KU8H

On 10/08/2018 03:42 PM, Jens wrote:
Hi Bill and others more ...

it was how I think about myself : Most I`m thinking to complicate !
I found this video from KD8CEC :
https://www.youtube.com/watch?v=fxquxqv7fAA

My next step was looking for “XLoader” , downloaded and installed .
Then downloaded only the KD8CEC FW v1.08 hex-zip , saved and unzipped .
The same with the uBITX-Manager .
With XLoader uploaded the FW v1.08 into the Arduino-Nano , successfull !
After this running the uBITX-Manager configured and write to Arduino the new
done settings !
All works successfull : CW-Sidetone changed &stored and
encoder-tune-steps now 10 Hz .

Thank you all for bearing the discussion about my stupid questions ...

73 , Jens / HB9JOI

+++


-----Ursprüngliche Nachricht-----
From: Bill Cromwell
Sent: Monday, October 8, 2018 7:56 PM
To: BITX20@groups.io
Subject: Re: [BITX20] uBitx Software Update

Hi Jen's

Let me start by saying it is so easy that even *I* could do it. That
doesn't mean I know it well enough to teach somebody else. If nobody
else steps up I will work something out with your and we will give it
try. I will learn more about by helping you. I cannot go live online
with you much before this weekend. I am a very busy retiree :)

Next...

Did you say that you are using the original display? Do you have USB
cables with connectors that will fit your computer at one end and that
small connector on the raduino unit at the other end? I will look at
CEC's site and send you the URL to the file to download. I can do that
*before* the weekend.

What operating system do you use? I am on linux but that won't matter. I
will review the Windows or iOS stuff if needed. We should move this to
private email so as not to further clutter the mail list.

73,

Bill KU8H

On 10/08/2018 01:34 PM, Jens wrote:
Hi Jack ,

I have studied the internet ...
Sorry, but now somehow I'm "too stupid" or I think too complicated
and it's a lot easier than I think.
To install the firmware v1.08 of KD8CEC on the uBITX I know
not which files I need and have to download, also how a source to
is to compile and how to proceed with the hex file and the upload to
uBITX.

I am totally confused with these things because I have never done it and
after searching and study the internet (KD8CEC) I am now complete
confused about
with the many files, because I do not know what is needed to update the
uBITX on v1.08.

Please ... is here someone who can and wants do the things together
with me via TEAMVIEWER online ....
for the first time so I can learn it ... ???


73 , Jens / HB9JOI
--
bark less - wag more

--
bark less - wag more


Re: Toroidal transformer values, toroids, windings, #ubitx #ubitx-help #parts

cburf1@...
 

Can't believe I missed that. Thanks!


audio oscillation #ubitx-help

KM4TRT
 

Hi Group
After several successful QSO's with my uBit-x (modified with CEC's software1.097 and Nextion 2.4 screen), my audio has started to go into oscillation
if I advance the volume control more than  about 60%.  Everything else seems to work properly, but the feedback is intense if I try to advance the volume.
Any ideas?
Andy  KM4TRT


Re: Received modulation is good only if IFS is 1400-1810

W2CTX
 

Is this audio issue just for SSB or CW too?

On October 7, 2018 at 2:38 PM "Dr. Flywheel" <Dr.Flywheel@...> wrote:


In my case (ubitx V4 with CEC software) I need to set the *IF SHIFT value
to 2500* in order to get a very nice audio sound. My VFO and BFO are
properly calibrated; therefore it is likely that filter component behavior
is responsible for the oscillator frequencies hitting to the side of the 45
MHz and 12 MHz filters. There is a way to compensate for this behavior by
adjusting the IF_SHIFTVALUE stored in the EEPROM. At this point, I chose to
ignore the problem and just set the IF SHIFT manually, since I do not have
time to work on my uBitx software right now.

I wonder if people on this list can tell us what is the EEPROM value stored
at the IF_SHIFTVALUE location, for their specific uBitx (if they are using
the CEC software).

Thanks,

--Ron N7FTZ

On Sun, Oct 7, 2018 at 10:41 AM Jens Uhlig <uhlig@...> wrote:

Hi Andrea,

that is exactly my problem too!
I have to switch on IFS and shift it to the right edge. (On my Nexion
Display)

Did not found a solution so far.
Setting up the BFO did not cure the Prob.

73 de DL7JU
Jens

*** mobil ***

Am 07.10.2018 um 19:25 schrieb "andrea@..." <andrea@...>:

Hi,
is it normal that I can listen correctly only if the IFS value is around
1400-1810 as value?




Re: I captured my own PSK31 signal and it is not a pretty picture #ubitx-help #filters

Dexter N Muir
 

I did this a couple of decades ago, for Packet. Also opto-isolated PTT (from RS-232 handshake line). Easy.


Re: Harmonics and Relay Replacement

Glenn
 


VK4PP 45Mhz Filter Boards. - AKA Simple spur fix

Nick VK4PP
 

Hi All.
Following on from https://groups.io/g/BITX20/topic/25208658
the filter boards are in, I will install one tonight and post up a PIC...

I have added them to my ordering page, price is ONE cent only, + postage.
Feel free to take up to 10 and also maybe sample the other warez...

VK4PP Order Form

73 Nick VK4PP


Re: Harmonics and Relay Replacement

Joe Puma
 

Mike this sounds promising. Thanks for the work and feedback. 

Joe




On Oct 8, 2018, at 4:51 PM, Gordon Gibby <ggibby@...> wrote:

Wow great work Mike!


On Oct 8, 2018, at 15:54, Mike Doty via Groups.Io <mikedoty@...> wrote:

I thought I would pass this along, for whatever it is worth.  I have two Ver 3 and one Ver 4 uBiTX rigs.  I have replaced K3, KT1, KT2, and KT3 relays with Axicom relays which has knocked down the 3rd, 5th, and 7th harmonic levels from -35dB to below -50dB on all 3 rigs without any board modifications to the LPF circuits.  This may be anecdotal but with 3 rigs showing the same results it may be something to consider.  I purchased the relays from Mouser - part # 655-V23105A5403A201.  Cost was $2.89 per relay plus shipping.  I've attached photos (sorry for the blurriness) showing the before and after results on my Ver 4 rig.
--73--  Mike  --  W0MNE
<v4_1 spec.jpg>
<v4_1 axicom spec.jpg>


Re: I captured my own PSK31 signal and it is not a pretty picture #ubitx-help #filters

Joe Puma
 

I would use the iso transformers like the ones they sell on eBay for audio. 

Joe 


On Oct 8, 2018, at 5:53 PM, Don - KM4UDX <dontAy155@...> wrote:

iz oos, I have a external USB soundcard connected with mini audio cables to the uBITX. And the normal usb cable between the laptop and the radiunio. 
Are you suggesting I need a "easy digi" type interface with isolation transformers to isolate the audio component? Or something else?

And thank you sooooo much for the help!!!!


Re: I captured my own PSK31 signal and it is not a pretty picture #ubitx-help #filters

Don - KM4UDX
 

iz oos, I have a external USB soundcard connected with mini audio cables to the uBITX. And the normal usb cable between the laptop and the radiunio. 
Are you suggesting I need a "easy digi" type interface with isolation transformers to isolate the audio component? Or something else?

And thank you sooooo much for the help!!!!


Re: Harmonics and Relay Replacement

iz oos
 

That's unbelievable! Wasn't the bad board layout causing it? Do the new version 4 have different relays and/or a different board layout?


Il 08/ott/2018 23:18, "Jim Sheldon" <w0eb@...> ha scritto:
I sent Mike a private email asking if these were pin for pin compatible.  While waiting for an answer I did some more research and find they ARE pin for pin.  They are also available at Digi-Key under the part# PB1055-ND for a couple of pennies less plus a bit cheaper shipping.  They are $2.81 each singly and $2.633 apiece in quantities of 10 each (enough to replace all 5 relays in 2 radios for $26.33 plus shipping.

I ordered 10 of them from Digi-Key and will replace all 5 relays in both of my V4 boards.  I'll run spectrum analysis on mine once I get that done and hopefully will duplicate Mike's indications.  Might be the simplest fix at least for the harmonic problem anyway.  Since I operate only CW, I'm not concerned with the SSB spurs anyway.

BTW, right now, both my V4 boards DO meet FCC spec with all harmonics -45 to -48 dBC on both boards.  I have NOT adjusted the factory set PA bias or the power controls as prior experience showed me that doing so was a great way to get the rig out of spec for sure.  

After changing the relays I'll do a complete bias adjustment on the PA transistors per the HF signals website instructions and check harmonics again.  If they are still in spec after that I'll play around with the power control while watching the spectrum analyzer to see what, if any changes occur.

I was recently given the use of an IFR A-8000 spectrum analyzer that was calibrated less than a month ago so I think the tests will be pretty accurate (after I learn how to use the beast! - LOL)

Jim Sheldon, W0EB

------ Original Message ------
From: "Mike Doty via Groups.Io" <mikedoty@...>
Sent: 10/8/2018 2:53:49 PM
Subject: [BITX20] Harmonics and Relay Replacement

I thought I would pass this along, for whatever it is worth.  I have two Ver 3 and one Ver 4 uBiTX rigs.  I have replaced K3, KT1, KT2, and KT3 relays with Axicom relays which has knocked down the 3rd, 5th, and 7th harmonic levels from -35dB to below -50dB on all 3 rigs without any board modifications to the LPF circuits.  This may be anecdotal but with 3 rigs showing the same results it may be something to consider.  I purchased the relays from Mouser - part # 655-V23105A5403A201.  Cost was $2.89 per relay plus shipping.  I've attached photos (sorry for the blurriness) showing the before and after results on my Ver 4 rig.
--73--  Mike  --  W0MNE


Re: Toroidal transformer values, toroids, windings, #ubitx #ubitx-help #parts

Doug W
 


Re: I captured my own PSK31 signal and it is not a pretty picture #ubitx-help #filters

iz oos
 

My guess is that you might have  ground loops between the radio and the computer.


Il 08/ott/2018 23:09, "Don - KM4UDX" <dontAy155@...> ha scritto:
So i finally got my SDR working at the same time as my uBITX while doing PSK31, and nothing blew up. Yea.
The picture shows big spikes off the center, if I read this right. 
Am I interpreting this frequency distribution correctly? I assume I should see a major spike and little else, correct?
Note, my sound card is at the lowest level I can set it. 
Is there something else I should do? I have to assume operator error is a major player here. hahah.


Re: Harmonics and Relay Replacement

Jim Sheldon
 

I sent Mike a private email asking if these were pin for pin compatible.  While waiting for an answer I did some more research and find they ARE pin for pin.  They are also available at Digi-Key under the part# PB1055-ND for a couple of pennies less plus a bit cheaper shipping.  They are $2.81 each singly and $2.633 apiece in quantities of 10 each (enough to replace all 5 relays in 2 radios for $26.33 plus shipping.

I ordered 10 of them from Digi-Key and will replace all 5 relays in both of my V4 boards.  I'll run spectrum analysis on mine once I get that done and hopefully will duplicate Mike's indications.  Might be the simplest fix at least for the harmonic problem anyway.  Since I operate only CW, I'm not concerned with the SSB spurs anyway.

BTW, right now, both my V4 boards DO meet FCC spec with all harmonics -45 to -48 dBC on both boards.  I have NOT adjusted the factory set PA bias or the power controls as prior experience showed me that doing so was a great way to get the rig out of spec for sure.  

After changing the relays I'll do a complete bias adjustment on the PA transistors per the HF signals website instructions and check harmonics again.  If they are still in spec after that I'll play around with the power control while watching the spectrum analyzer to see what, if any changes occur.

I was recently given the use of an IFR A-8000 spectrum analyzer that was calibrated less than a month ago so I think the tests will be pretty accurate (after I learn how to use the beast! - LOL)

Jim Sheldon, W0EB

------ Original Message ------
From: "Mike Doty via Groups.Io" <mikedoty@...>
Sent: 10/8/2018 2:53:49 PM
Subject: [BITX20] Harmonics and Relay Replacement

I thought I would pass this along, for whatever it is worth.  I have two Ver 3 and one Ver 4 uBiTX rigs.  I have replaced K3, KT1, KT2, and KT3 relays with Axicom relays which has knocked down the 3rd, 5th, and 7th harmonic levels from -35dB to below -50dB on all 3 rigs without any board modifications to the LPF circuits.  This may be anecdotal but with 3 rigs showing the same results it may be something to consider.  I purchased the relays from Mouser - part # 655-V23105A5403A201.  Cost was $2.89 per relay plus shipping.  I've attached photos (sorry for the blurriness) showing the before and after results on my Ver 4 rig.
--73--  Mike  --  W0MNE


I captured my own PSK31 signal and it is not a pretty picture #ubitx-help #filters

Don - KM4UDX
 

So i finally got my SDR working at the same time as my uBITX while doing PSK31, and nothing blew up. Yea.
The picture shows big spikes off the center, if I read this right. 
Am I interpreting this frequency distribution correctly? I assume I should see a major spike and little else, correct?
Note, my sound card is at the lowest level I can set it. 
Is there something else I should do? I have to assume operator error is a major player here. hahah.