Date   
Re: How to get rid of Local FM broadcast stations #ubitx

MVS Sarma
 

Use a 2wire + shield cable between audio 8 pin plug and the volume control. The ground pin of VC can return  back on the shield wire to the connector. But not to be grounded there at VC.
Hope this method helps.

Sarma vu3zmv

On Sat, 7 Dec 2019, 9:24 pm Gavin, <gdesplin@...> wrote:

I have my radio in the chassis now, no more humming, but the radio stations are back. I can’t see any wires touching the chassis and the stations were there without the lid. And they are persistent no matter my tuning. Here are some pictures:

On Mon, Dec 2, 2019 at 08:03 PM, Adrian Chadd wrote:

hi,

post a photo of the wiring. you may need to shorten some wires and do
some RF bypassing?



-adrian

On Mon, 2 Dec 2019 at 19:33, <gdesplin@...> wrote:

I tried taking it of the metal chassis and now the broadcast stations were quiet compared to a loud hum. The hum got more intense if I put my fingers close it the volume control wires. Also if things got moved around a bit it the broadcast stations would get loud and then stop when things moved back around again.

On Mon, Dec 2, 2019 at 06:10 PM, Ashhar Farhan wrote:

If the stations are heard regardless of your tuning, it is probable that they are being picked up by the audio system. Can you double check that the volume control and the speaker wires don't touch the chassis anywhere?

- f

On Tue 3 Dec, 2019, 1:36 AM , <gdesplin@...> wrote:

Ok, so are you talking about getting this http://qrpme.com/?p=product&id=BCI like suggested at http://ubitx.net/fix-bci-filter/ or another one of their suggestions? Or maybe something like in this youtube video https://www.youtube.com/watch?v=fgQenFJOjr4 ? Or did you have something else in mind? I'm all for whichever is simplest/easiest as I am a beginner.

On Mon, Dec 2, 2019 at 10:20 AM, Adrian Chadd wrote:

well, yeah. If you have AM stations close by then they can definitely
overwhelm your frontend.

Get one of the bitx AM broadcast filters; they're high-pass filters
that drop-off around 3MHz. So yeah, you won't be receiving 160m, but
that's ok right?


-adrian

On Mon, 2 Dec 2019 at 09:17, <gdesplin@...> wrote:


Ah, it looks like both these stations also have AM counterparts, at 1490 kHz and 1210 kHz. Does that change things?

Re: How to get rid of Local FM broadcast stations #ubitx

Gavin
 

I have my radio in the chassis now, no more humming, but the radio stations are back. I can’t see any wires touching the chassis and the stations were there without the lid. And they are persistent no matter my tuning. Here are some pictures:

On Mon, Dec 2, 2019 at 08:03 PM, Adrian Chadd wrote:

hi,

post a photo of the wiring. you may need to shorten some wires and do
some RF bypassing?



-adrian

On Mon, 2 Dec 2019 at 19:33, <gdesplin@...> wrote:

I tried taking it of the metal chassis and now the broadcast stations were quiet compared to a loud hum. The hum got more intense if I put my fingers close it the volume control wires. Also if things got moved around a bit it the broadcast stations would get loud and then stop when things moved back around again.

On Mon, Dec 2, 2019 at 06:10 PM, Ashhar Farhan wrote:

If the stations are heard regardless of your tuning, it is probable that they are being picked up by the audio system. Can you double check that the volume control and the speaker wires don't touch the chassis anywhere?

- f

On Tue 3 Dec, 2019, 1:36 AM , <gdesplin@...> wrote:

Ok, so are you talking about getting this http://qrpme.com/?p=product&id=BCI like suggested at http://ubitx.net/fix-bci-filter/ or another one of their suggestions? Or maybe something like in this youtube video https://www.youtube.com/watch?v=fgQenFJOjr4 ? Or did you have something else in mind? I'm all for whichever is simplest/easiest as I am a beginner.

On Mon, Dec 2, 2019 at 10:20 AM, Adrian Chadd wrote:

well, yeah. If you have AM stations close by then they can definitely
overwhelm your frontend.

Get one of the bitx AM broadcast filters; they're high-pass filters
that drop-off around 3MHz. So yeah, you won't be receiving 160m, but
that's ok right?


-adrian

On Mon, 2 Dec 2019 at 09:17, <gdesplin@...> wrote:


Ah, it looks like both these stations also have AM counterparts, at 1490 kHz and 1210 kHz. Does that change things?

Re: uBitX as a Shortwave Receiver?

iz oos
 

In my opinion using it just as a receiver is a bit of waste. It's an excellent choice as a qrp transceiver, but a Tecsun portable receiver like a PL660 is just more convenient with synch detector, AM, excellent SSB, excellent AGC, and you have the AM Airband as well. And plenty of volume too.


Il 06/dic/2019 01:25, "Mike Dice via Groups.Io" <regenbuilder=yahoo.com@groups.io> ha scritto:
I have read over the info about the uBitX on HFSigs. I understand it receives LSB and USB, but there is no mention of it being capable of receiving AM. I am considering getting one to use primarily to listen to what's left on shortwave. Is that possible?

Thanks, Mike



Re: Nextion Question

Evan Hand
 

Here is the link to the KD8CEC github for version 1.2 that has support for the uBitx v5:
https://github.com/phdlee/ubitx/releases/tag/v1.20

I believe that the Nextion tft files link is on this page:
http://www.hamskey.com/2018/06/ubitx-with-nextion-lcd-cec-firmware.html

Be sure to note the information in the v1.2 zip file that describes the different files in the archive.

Hope this helps
Evan
AC9TU

Re: WTB uBITX Harness and Controls

Dale Hardin
 

Yep Curt, I may have to go that route, but I already have a nice case on the way.  What I am trying to avoid is going to my junk box.  Maybe somebody will have a spare.  Dale

On Fri, Dec 6, 2019 at 1:17 PM Curt via Groups.Io <wb8yyy=yahoo.com@groups.io> wrote:
Dale

Here is another thought to explore. Many of us buy the case from amateurradiokits.in. Sunil also sells a companion set of harness. This may be the most turnkey approach. I like the end result.

Curt



--
Dale Hardin
24750 State St. Unit 487
Elberta, AL 36530
251-597-9256

--
Dale Hardin, KS4NS
Elberta, AL

Re: WTB uBITX Harness and Controls

Curt
 

Dale

Here is another thought to explore. Many of us buy the case from amateurradiokits.in. Sunil also sells a companion set of harness. This may be the most turnkey approach. I like the end result.

Curt

Re: WTB uBITX Harness and Controls

Dale Hardin
 

I don't know about anyone else, but I would rather get the harness and controls all made up.  It is a pain to crimp molex connectors even though I have the tool.  So, to get back to the topic; anyone have a spare harness and controls???
--
Dale Hardin, KS4NS
Elberta, AL

Re: nextion noise 2.5mh choke

talmadge huckabee
 

I wish there was some to disable the dimming mode of the nextion display, maybe contact nextion to see if this is possible?
because the choke dose not get rid of the noise completely! 


-----Original Message-----
From: _Dave_ K0MBT <davesters@...>
To: BITX20 <BITX20@groups.io>
Sent: Fri, Dec 6, 2019 9:52 am
Subject: Re: [BITX20] nextion noise 2.5mh choke

I wrapped all 4 feed wires around a toroid core. I figured that I didn't know which wire was emitting in common mode so they all got the treatment. Made the installation neat using up the excess wire. 

Different than your method but similar.
--
73
Dave
k0mbt
Raduino bracket and Ham_Made_Keys

Re: WTB uBITX Harness and Controls

Ian Reeve
 

Hi Cory,

 

They are Molex Type KK  KF2510 2.54mm Connector Sets (2-20 Pin) Housing+Header+Crimps (Molex KK Style)

 

 

https://www.ebay.co.uk/itm/KF2510-2-54mm-Connector-Sets-2-20-Pin-Housing-Header-Crimps-Molex-KK-Style/232409150524?_trkparms=ispr%3D1&hash=item361caa343c:m:mKLRuL-k1U8aeZZUWbAh4aw&enc=AQAEAAACQBPxNw%2BVj6nta7CKEs3N0qV3cJiJ0lZQQBpuYIUJJaPuxO0O5UD0yqw9nZlxzofqu4NwxUxzFlCfTm3vj0HrAqkJ0dxqL6I6pWYf%2F4L6%2FBi7FiVmBLqZQvitGA7lLAXDtleuoRBKQjxfdjEfDNIHVWI8NWUtgx59Rt22YEyp7gNqmevtLMY3aqoT5v%2F72%2BcHkL4BlM1SPRYkTlmBW0DWjXq1U%2Fx8WcNi%2B0vhBFXgxpSkAfb%2F1CN%2F4lrwd3v57qHy2bCZU1PGmU7Xt2M4msVRRjtJE2O1ZOtxIGEEC9xvKoY1KGSeLpspXfB6NG3zqcaf6wuRtsvJ32xAveuqRlDVlOi0AHsrPPyMiqj2vtwxA4o8T%2B9AAckcz3ms5UqhoR4gQjfmHgO5vvo3y0kiWVA0Kts%2F%2FReuqwU1xG0elHMDdy9%2Fw%2B0lu50zV%2F3OyJPoupY5vudD3wlPrpfVMjSdL8kVt2y36x8VAyinwx3a5ZywXwQpRt9R9EztrHGvp1pPIEx5BQ9MZ3OQaxC0Abz0QIj2XMFYtIsGamD4uNo0FbXl2wIUJx9R47PzLezmtrhaDDNisOzfuP69BeyAx8PHUhv7vkZ4BBFPx92xLSRispLFtIbYpD4BHrkTIVond6VxLJlgAVDE%2F%2BhcxwACDYXN2%2BIUVmBRIFc6lvkxMQD8639B42Gs%2BxG7ifR2BGZlqxy2dKIwbMDbbrvNyIhYuBZxFA4tVbVPjmJibRmzIoMxz4%2FBXwoxArfSd1Ul%2FGDczdC144JExA%3D%3D&checksum=232409150524c922777e38d843c787ceb278f5ba77c9&enc=AQAEAAACQBPxNw%2BVj6nta7CKEs3N0qV3cJiJ0lZQQBpuYIUJJaPuxO0O5UD0yqw9nZlxzofqu4NwxUxzFlCfTm3vj0HrAqkJ0dxqL6I6pWYf%2F4L6%2FBi7FiVmBLqZQvitGA7lLAXDtleuoRBKQjxfdjEfDNIHVWI8NWUtgx59Rt22YEyp7gNqmevtLMY3aqoT5v%2F72%2BcHkL4BlM1SPRYkTlmBW0DWjXq1U%2Fx8WcNi%2B0vhBFXgxpSkAfb%2F1CN%2F4lrwd3v57qHy2bCZU1PGmU7Xt2M4msVRRjtJE2O1ZOtxIGEEC9xvKoY1KGSeLpspXfB6NG3zqcaf6wuRtsvJ32xAveuqRlDVlOi0AHsrPPyMiqj2vtwxA4o8T%2B9AAckcz3ms5UqhoR4gQjfmHgO5vvo3y0kiWVA0Kts%2F%2FReuqwU1xG0elHMDdy9%2Fw%2B0lu50zV%2F3OyJPoupY5vudD3wlPrpfVMjSdL8kVt2y36x8VAyinwx3a5ZywXwQpRt9R9EztrHGvp1pPIEx5BQ9MZ3OQaxC0Abz0QIj2XMFYtIsGamD4uNo0FbXl2wIUJx9R47PzLezmtrhaDDNisOzfuP69BeyAx8PHUhv7vkZ4BBFPx92xLSRispLFtIbYpD4BHrkTIVond6VxLJlgAVDE%2F%2BhcxwACDYXN2%2BIUVmBRIFc6lvkxMQD8639B42Gs%2BxG7ifR2BGZlqxy2dKIwbMDbbrvNyIhYuBZxFA4tVbVPjmJibRmzIoMxz4%2FBXwoxArfSd1Ul%2FGDczdC144JExA%3D%3D&checksum=232409150524c922777e38d843c787ceb278f5ba77c9

 

 

 

Available via the Ebay auction site and other retailers.

 

Ian M0IDR

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of Cory King <cory@...>
Sent: Thursday, December 5, 2019 4:56:28 PM
To: BITX20@groups.io <BITX20@groups.io>
Subject: Re: [BITX20] WTB uBITX Harness and Controls
 
Not at all trying to derail this question, but anybody know exactly what the connector types this thing uses are called?  I'd love to order some extras up from mouser or something...

Re: WTB uBITX Harness and Controls

_Dave_ K0MBT
 

That is raw.

You can hard wire the radio and have it work just fine. 
--
73
Dave
k0mbt
Raduino bracket and Ham_Made_Keys

Re: nextion noise 2.5mh choke

_Dave_ K0MBT
 

I wrapped all 4 feed wires around a toroid core. I figured that I didn't know which wire was emitting in common mode so they all got the treatment. Made the installation neat using up the excess wire. 

Different than your method but similar.
--
73
Dave
k0mbt
Raduino bracket and Ham_Made_Keys

Re: uBitX as a Shortwave Receiver?

Don, ND6T
 

Absolutely Mike! With the inherent stability of the uBITX it tunes nicely to the exact frequency, zero beat, and no problem in receiving AM. Actually, it is somewhat better since the selective fade is less troublesome when you aren't relying upon the carrier for demodulation. The narrow bandpass isn't bad, cuts down on the adjacent channel interference. I like the idea of being able to listen to MW broadcast as well especially while portable and for emcomm. Weather and news. Not so much for music. 73, Don

Re: kd8cec software

Bill Cromwell
 

Hi David,

Welcome. I have a Version 3 uBitX and I started using it completely unmodified. There is no need to make any modifications unless you want *more* and of course pay *more*. I made a modification to mine that tames the unbearably loud sidetone in the CW mode. If you don't use CW you can ignore that. The version has questionable harmonic suppression, I use external filters to make mine cleaner. That is not a mod to the radio but is a mod to operating practices. Except that I have always done that:)

The recommendation is to get your uBitX (or any other kit) working as designed first and after you see that everything works pick and choose mods that might work for you. I use the CEC software but the radio itself is unchanged and can be returned to original by simply loading the original software. It sounds as though you like the bigger, color, touch display. I find the original display adequate.

Enjoy your uBitX. Merry Christmas and...

73,

Bill KU8H

On 12/5/19 10:51 PM, David Alexander wrote:
having just walked in the door a couple of days ago, there seems to be quite a bit of mods that can be made to the ubix radios. my question is where does one start to add the lcd displays to this radio using the kd8cec software.
whats necessary hardware wise to use the nextion displays?  what is necessary for the software also?
thanks
dave k7da
--
bark less - wag more

Re: uBitX as a Shortwave Receiver?

Sudipta Ghose VU2UT
 

For hard core SWLs 5kHz BW is sufficient for their purpose.
73 de EssGee VU2UT

On Fri, Dec 6, 2019 at 10:53 AM MVS Sarma <mvssarma@...> wrote:
The am content being mono in most countries, with ham's skill to be able to tune ssb, am listening on any side band is not a big issue. We may not need specific am or synchronus detector.  As rightly pointed out bt Farhan, we may not get 10khz on medium and 5khz on shortwave. The audio I hear is reasonable for me. 

Sarma vu3zmv

On Fri, 6 Dec 2019, 7:30 am Ashhar Farhan, <farhanbox@...> wrote:
I use it to do that often. However, it is not very great for music as the crystal filter is quite narrow. You can easily add an AM detector at 45 mhz by using an NE612 as an active AM detector. The output can be fed into the volume control.

- f

On Fri 6 Dec, 2019, 5:55 AM Mike Dice via Groups.Io, <regenbuilder=yahoo.com@groups.io> wrote:
I have read over the info about the uBitX on HFSigs. I understand it receives LSB and USB, but there is no mention of it being capable of receiving AM. I am considering getting one to use primarily to listen to what's left on shortwave. Is that possible?

Thanks, Mike





--
One of those ... ...

Re: A minor bug in the ubitx circuit

Evan Hand
 

Russ,

The side tone is generated by the Raduino Nano and fed to the audio.  The CW signal to the power amp is from the Raduino Si5351 VFO direct.  The BFO is disabled during CW transition. 

Sp a low side tone is just that the setting is lower in the Nano. 


73
Evan
AC9TU

Re: uBitX as a Shortwave Receiver?

MVS Sarma
 

The am content being mono in most countries, with ham's skill to be able to tune ssb, am listening on any side band is not a big issue. We may not need specific am or synchronus detector.  As rightly pointed out bt Farhan, we may not get 10khz on medium and 5khz on shortwave. The audio I hear is reasonable for me. 

Sarma vu3zmv

On Fri, 6 Dec 2019, 7:30 am Ashhar Farhan, <farhanbox@...> wrote:
I use it to do that often. However, it is not very great for music as the crystal filter is quite narrow. You can easily add an AM detector at 45 mhz by using an NE612 as an active AM detector. The output can be fed into the volume control.

- f

On Fri 6 Dec, 2019, 5:55 AM Mike Dice via Groups.Io, <regenbuilder=yahoo.com@groups.io> wrote:
I have read over the info about the uBitX on HFSigs. I understand it receives LSB and USB, but there is no mention of it being capable of receiving AM. I am considering getting one to use primarily to listen to what's left on shortwave. Is that possible?

Thanks, Mike



kd8cec software

David Alexander
 

having just walked in the door a couple of days ago, there seems to be quite a bit of mods that can be made to the ubix radios. my question is where does one start to add the lcd displays to this radio using the kd8cec software.
whats necessary hardware wise to use the nextion displays?  what is necessary for the software also?

thanks
dave k7da

Re: uBitX as a Shortwave Receiver?

Ashhar Farhan
 

I use it to do that often. However, it is not very great for music as the crystal filter is quite narrow. You can easily add an AM detector at 45 mhz by using an NE612 as an active AM detector. The output can be fed into the volume control.

- f

On Fri 6 Dec, 2019, 5:55 AM Mike Dice via Groups.Io, <regenbuilder=yahoo.com@groups.io> wrote:
I have read over the info about the uBitX on HFSigs. I understand it receives LSB and USB, but there is no mention of it being capable of receiving AM. I am considering getting one to use primarily to listen to what's left on shortwave. Is that possible?

Thanks, Mike



Re: A minor bug in the ubitx circuit

Ashhar Farhan
 

Russ,
The dashes dont seem long enough on the sidetone though they are transmitted properly. The dashes sound like blips. What is happening is that as a number of square waves pass through the filters caps, they charge up to an average of 2.5v (average of 0 and 5v). The 2.5v DC at the input of the LM386 DC saturates the chip and the audio input stops being amplified. The caps diacharge as soon as the sidetone ceases. The cycle repeats in the next dash. The dots are small enough to be finished before the DC rises enough to saturate the LM386.
- f

On Fri 6 Dec, 2019, 6:17 AM Russ KR0EHM, <russ@...> wrote:
How does this problem manifest itself? Just no CW tone at all or something else? My CW is working on relatively new v5 board so wanted to make sure. I’ve noticed it is a bit lower than I expect it to be (100-200 Hz) but that could be my BFO off, correct?

Re: A minor bug in the ubitx circuit

Russ KR0EHM
 

How does this problem manifest itself? Just no CW tone at all or something else? My CW is working on relatively new v5 board so wanted to make sure. I’ve noticed it is a bit lower than I expect it to be (100-200 Hz) but that could be my BFO off, correct?