Date   
Re: ubitx ver 4 for sale

Ian Reeve
 

Hi Peter,

Further to my earlier e-mail requesting pictures

I can see there is a lot of interest in the uBitX, perhaps you could kindly advise your payment details.

 

Kind Regards M0IDR

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of Peter Russell <peter.russell@...>
Sent: Wednesday, March 6, 2019 1:51:51 PM
To: BITX20@groups.io
Subject: [BITX20] ubitx ver 4 for sale
 
After serious deliberation, I have decided to sell my ubitx transceiver.
I have done Raj's mods - the 45 Mhz filter inductors replaced by smd's,
the new filter in front of the second mixer and the 2 resistors have
been changed to increase the gain.
I have also added the N6DT agc mod and a TDA2030 audio amp.
It was changing the smd's that did it!
I'm getting a bit too long in the tooth to be able to handle these
little beggars, Apart from that, since I retired I don't have access to
a spectrum analyser or any other form of sophisticated equipment.
I have enjoyed putting this together - it's rekindled my interest in ham
radio, but I do know my limitations.
It comes in a pretty blue (Chinese) box complete with a Nextion 2.8 display.
The receiver works very well and as far as I'm aware, the transmitter is
ok, although I've never had the confidence to put it on the air.
I'm asking £80 for it and that will include UK shipping.
Photos available on request.

Peter, G8FWY

---
This email has been checked for viruses by AVG.
https://www.avg.com




New V5 with poor carrier suppression.

Mike
 

Group,

 I noticed that my New version 5 has poor carrier suppression. I noticed this when I ran my UbitX into my LDMOS amp and I seen about 10 watts out of carrier. I was wondering if it is due to a maladjustment in the BFO? The radio has very good sounding TX audio (especially with the IC7300 mic) and very good RX audio. 

 I also understand that the gain from the LDMOS amp is "amplifying" the problem (.5 watts into the amp gets about 500 PEP out).

 I am using the latest CEC 1.12 software

Thank  you.
Mike WA30

Re: New V5 with poor carrier suppression.

Mike
 

I should also note that I have turned the power down on the Ubitx to make sure I am not driving the amp with more than .5 watts...


Thanks

Mike WA3O

cannot trust any version or any mod.

Michael Mitchell
 

I am almost finished with my uBitx version 4. It has the following:
Nextion 2.8
SDR receiver/panadapter (switch selectable with input grounding relay when transmitting.)
Built in antenna switch for selecting 1 of 3 antennas.
UHF antenna connector for SDR
VHF antenna connector for SDR both switch selectable.
Built in auto tuner.
built in power supply Plus a 5 volt and 9 volt buck supply.
Fuses for everything
Nice case and labeled front and rear panel.

BUT It seems to me there is nothing that make these radios U.S. reliably legal.
I think its time for the company to solve all the problems before selling any more units . Unless I can be convinced that I am wrong I will be selling my radio as soon as I test it.
I think the advertising for the radio is very misleading. It seems that the longer the radio has been produced the more problems appear. NOT what the initial advertising said.  If it were possible I would ask for a refund but even a full refund doesnt come close to what I have invested.

Re: New V5 with poor carrier suppression.

iz oos
 

Normally in brand rigs the carrier is down around 40db, in your case seems barely 20db. The question is if there is a legal limit to this. If this is legal anyway and sounds good in both TX and RX then you might choose not to make any changes. Otherwise you should move further a bit the BFO, like 200hz and see the attenuation.


Il 06/mar/2019 18:25, "Mike via Groups.Io" <mikeymustang2000=yahoo.com@groups.io> ha scritto:
I should also note that I have turned the power down on the Ubitx to make sure I am not driving the amp with more than .5 watts...


Thanks

Mike WA3O

Re: New V5 with poor carrier suppression.

bill richardson
 

I too had this problem and yes it’s all in the BFO adjustment. I was able to get mine down.


On Mar 6, 2019, at 12:25 PM, Mike via Groups.Io <mikeymustang2000@...> wrote:

I should also note that I have turned the power down on the Ubitx to make sure I am not driving the amp with more than .5 watts...


Thanks

Mike WA3O

Re: New V5 with poor carrier suppression.

bill richardson
 

Adjusting the BFO did the trick. For my v5 the BFO is set at 11.055.3


On Mar 6, 2019, at 12:38 PM, bill richardson via Groups.Io <ng1p.bill@...> wrote:

I too had this problem and yes it’s all in the BFO adjustment. I was able to get mine down.


On Mar 6, 2019, at 12:25 PM, Mike via Groups.Io <mikeymustang2000@...> wrote:

I should also note that I have turned the power down on the Ubitx to make sure I am not driving the amp with more than .5 watts...


Thanks

Mike WA3O

Re: cannot trust any version or any mod.

Brutus Laurentius
 

How much do you want for all that stuff?

Re: New V5 with poor carrier suppression.

M0OOZ
 

I beg to differ! Sir, if the carrier is only down by 20dB then its not a question of looking at regulations! It is a strong indication of 'something being rotten in the state of Denmark'

Translated into normal vernacular, something is very wrong with either filtering or/ and the carrier is bleeding through to the finals or drivers or / and there is some kind of other weird problem produced by the firmware and its compatibility with your board. 



On Wed, 6 Mar 2019, 18:38 iz oos, <and2oosiz2@...> wrote:

Normally in brand rigs the carrier is down around 40db, in your case seems barely 20db. The question is if there is a legal limit to this. If this is legal anyway and sounds good in both TX and RX then you might choose not to make any changes. Otherwise you should move further a bit the BFO, like 200hz and see the attenuation.


Il 06/mar/2019 18:25, "Mike via Groups.Io" <mikeymustang2000=yahoo.com@groups.io> ha scritto:
I should also note that I have turned the power down on the Ubitx to make sure I am not driving the amp with more than .5 watts...


Thanks

Mike WA3O

Re: cannot trust any version or any mod.

Laurence Oberman
 

Hi Michael.

Please share your test results when you can.

I have this issue on 20m only in cw on the v4, where I have close
harmonic spurs about 10b down only.
I already mentioned it on list
The rest seem fine all tests into a dummy load witha coupler and
attenuator to the Spec an
I am using a Nextion with Ian Lee's code.

I did swap the V5 this morning and so far all bands look OK to me on
CW into the dummy load and checking on the Spec an.

73
Laurence Oberman
KB1HKO


On Wed, Mar 6, 2019 at 12:30 PM Michael Mitchell
<mitchellmichaelh@...> wrote:

I am almost finished with my uBitx version 4. It has the following:
Nextion 2.8
SDR receiver/panadapter (switch selectable with input grounding relay when transmitting.)
Built in antenna switch for selecting 1 of 3 antennas.
UHF antenna connector for SDR
VHF antenna connector for SDR both switch selectable.
Built in auto tuner.
built in power supply Plus a 5 volt and 9 volt buck supply.
Fuses for everything
Nice case and labeled front and rear panel.

BUT It seems to me there is nothing that make these radios U.S. reliably legal.
I think its time for the company to solve all the problems before selling any more units . Unless I can be convinced that I am wrong I will be selling my radio as soon as I test it.
I think the advertising for the radio is very misleading. It seems that the longer the radio has been produced the more problems appear. NOT what the initial advertising said. If it were possible I would ask for a refund but even a full refund doesnt come close to what I have invested.

Re: ubitx ver 4 for sale

Peter Russell <peter.russell@...>
 

OK Ian, you were first in the queue.

I'll email you direct with details etc.

Peter.

On 06/03/2019 14:49, Ian Reeve wrote:
Hello Peter, I would appreciate some pictures please. I am interested. Thankyou
73
Ian
M0IDR
Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
------------------------------------------------------------------------
*From:* BITX20@groups.io <BITX20@groups.io> on behalf of Peter Russell <peter.russell@...>
*Sent:* Wednesday, March 6, 2019 1:51:51 PM
*To:* BITX20@groups.io
*Subject:* [BITX20] ubitx ver 4 for sale
After serious deliberation, I have decided to sell my ubitx transceiver.
I have done Raj's mods - the 45 Mhz filter inductors replaced by smd's,
the new filter in front of the second mixer and the 2 resistors have
been changed to increase the gain.
I have also added the N6DT agc mod and a TDA2030 audio amp.
It was changing the smd's that did it!
I'm getting a bit too long in the tooth to be able to handle these
little beggars, Apart from that, since I retired I don't have access to
a spectrum analyser or any other form of sophisticated equipment.
I have enjoyed putting this together - it's rekindled my interest in ham
radio, but I do know my limitations.
It comes in a pretty blue (Chinese) box complete with a Nextion 2.8 display.
The receiver works very well and as far as I'm aware, the transmitter is
ok, although I've never had the confidence to put it on the air.
I'm asking £80 for it and that will include UK shipping.
Photos available on request.
Peter, G8FWY
---
This email has been checked for viruses by AVG.
https://www.avg.com

What to do with ubitx ver<5 boards? V-U operation?

iz oos
 

Some seem to replace the older ubitx boards with ver 5. I too am thinking about that. But then what to do with the older boards? One idea that comes to mind is to use the ubitx up to the PA and drive the cheap V-U (50-144-432mhz) transverters one may find on ebay. Has anyone done this?

Re: New V5 with poor carrier suppression.

Evan Hand
 

The carrier suppression is related to the BFO adjustment.  There is just one filter section for SSB that does double duty for both transmit and receive.  There is also only one BFO that provides the signal to mix with the audio to then be applied to the crystal filter.  What I found is this limitation is a trade-off of sound "tone" on receive with carrier suppression on transmit.  The radio will sound a little "tinny", or have a higher speaking tone, when adjusted to reduce the carrier, at least that was the case for the v4 board that I have.  I used a makeshift signal analyzer to find that out (SDRPlay with SA software).  I believe it was Raj (if that is incorrect, I apologize) that suggested using another rig receiving while transmitting into a dummy load to make the BFO adjustments. You would adjust the BFO on the uBitx for minimum tone signal on the other rig.  Based on my SDRPlay SA, it would mean not hearing anything with a quiet mic, even when adjusting the received frequency slightly to verify not side tone is generated.

After doing the adjustment, The carrier was down to more than 30 DB, and could be adjusted to almost 40 db.  Since it is within a normal AM width, there is nothing in the FCC requirements for the close in carrier reduction. It is transmitter efficiency and the side tone that could be generated on the receiving side.  30db should be enough.

Above are my experiences and opinions, yours may vary.

73
Evan
AC9TU

Re: New V5 with poor carrier suppression.

Mike
 

I guess I should have stated this but the carrier is zero beat on my SSB signal. So there is no tone on my transmit that I know of.

Thanks

Mike WA3O

Re: ubitx ver 4 for sale

Ian Reeve
 

Thank-you Peter,I look forward to hearing from you. 73. Ian M0IDR


From: BITX20@groups.io <BITX20@groups.io> on behalf of Peter Russell <peter.russell@...>
Sent: Wednesday, March 6, 2019 7:10:22 PM
To: BITX20@groups.io
Subject: Re: [BITX20] ubitx ver 4 for sale
 
OK Ian, you were first in the queue.

I'll email you direct with details etc.

Peter.



On 06/03/2019 14:49, Ian Reeve wrote:
> Hello Peter, I would appreciate some pictures please. I am interested.
> Thankyou
>
> 73
>
> Ian
>
> M0IDR
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
> ------------------------------------------------------------------------
> *From:* BITX20@groups.io <BITX20@groups.io> on behalf of Peter Russell
> <peter.russell@...>
> *Sent:* Wednesday, March 6, 2019 1:51:51 PM
> *To:* BITX20@groups.io
> *Subject:* [BITX20] ubitx ver 4 for sale
> After serious deliberation, I have decided to sell my ubitx transceiver.
> I have done Raj's mods - the 45 Mhz filter inductors replaced by smd's,
> the new filter in front of the second mixer and the 2 resistors have
> been changed to increase the gain.
> I have also added the N6DT agc mod and a TDA2030 audio amp.
> It was changing the smd's that did it!
> I'm getting a bit too long in the tooth to be able to handle these
> little beggars, Apart from that, since I retired I don't have access to
> a spectrum analyser or any other form of sophisticated equipment.
> I have enjoyed putting this together - it's rekindled my interest in ham
> radio, but I do know my limitations.
> It comes in a pretty blue (Chinese) box complete with a Nextion 2.8 display.
> The receiver works very well and as far as I'm aware, the transmitter is
> ok, although I've never had the confidence to put it on the air.
> I'm asking £80 for it and that will include UK shipping.
> Photos available on request.
>
> Peter, G8FWY
>
> ---
> This email has been checked for viruses by AVG.
> https://www.avg.com
>
>
>
>
>



Re: cannot trust any version or any mod.

Laurence Oberman
 

I should add that I have not calibrated the V5 at all and that is
using stock firmware, not Ian's beta v5.
I was focusing only on the spurs and so far from an FCC point of view
at first looks it looks OK to me.

I need to spend more time on it but this is what the configuration is right now.

V5 board put into the case I had my V4 in, cover is off
Antenna to a directional coupler input, output to the dummy load
Couple port to Siglent via a 20DB attenuator

Test each band using CW straight KEY and transmit
Check harmonic spurs and see if we have them are they with FCC specs
down from the Fundamental

Have not done any SSB tests yet

Thank
At work now so will test more tonight

Thanks
Laurence


On Wed, Mar 6, 2019 at 2:04 PM Laurence Oberman via Groups.Io
<oberman.l=gmail.com@groups.io> wrote:

Hi Michael.

Please share your test results when you can.

I have this issue on 20m only in cw on the v4, where I have close
harmonic spurs about 10b down only.
I already mentioned it on list
The rest seem fine all tests into a dummy load witha coupler and
attenuator to the Spec an
I am using a Nextion with Ian Lee's code.

I did swap the V5 this morning and so far all bands look OK to me on
CW into the dummy load and checking on the Spec an.

73
Laurence Oberman
KB1HKO


On Wed, Mar 6, 2019 at 12:30 PM Michael Mitchell
<mitchellmichaelh@...> wrote:

I am almost finished with my uBitx version 4. It has the following:
Nextion 2.8
SDR receiver/panadapter (switch selectable with input grounding relay when transmitting.)
Built in antenna switch for selecting 1 of 3 antennas.
UHF antenna connector for SDR
VHF antenna connector for SDR both switch selectable.
Built in auto tuner.
built in power supply Plus a 5 volt and 9 volt buck supply.
Fuses for everything
Nice case and labeled front and rear panel.

BUT It seems to me there is nothing that make these radios U.S. reliably legal.
I think its time for the company to solve all the problems before selling any more units . Unless I can be convinced that I am wrong I will be selling my radio as soon as I test it.
I think the advertising for the radio is very misleading. It seems that the longer the radio has been produced the more problems appear. NOT what the initial advertising said. If it were possible I would ask for a refund but even a full refund doesnt come close to what I have invested.

Re: TX vs received frequency tweak help... #calibration #ubitx-help

Don - KM4UDX
 

I don't actually do CW -- so I'm playing conceptual catchup. 

If the uBITX screen shows -780hz relative to the external receiver received freq, and if this is typical, normal, and std,then I'm happy.

Total newbie asks typical stupid question....lingering question....I hate to ask this actually....

but this means that if uBITX display freq is X and I send CW,  then someone will have to tune to X+780hz to hear me, right?   So if two of us were to try and match logs, for example, my TX freq and their Receive freq would always be off by .78K. Wouldn't this be a problem? Or is it close enough for logging  with QRZ or LOTW, etc?  

Thanks so much for the guidance and education.

Don

Re: AGC Pre-Oders are in and built!

 

ALL pre-orders have shipped wooh!.

Tracking can  be found via your paypal transaction, if for any reason can not get to it let us know and we will forward the info to you.

We should have more up on the site in the next 24 hours.

73
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: ubitx ver 4 for sale

Carlos Fonseca - CT1GFQ
 

Hello.

Don’t forgot all.
 
I’m looking for a uBitx full mounted because I’m not good with DIY.....
Anyone more selling, in EU prefered?
 
73's de Carlos CT1GFQ
SKCC#466T www.skccgroup.com
REP#1406 www.rep.pt
https://www.youtube.com/user/carlosfonsecaalmada/videos
https://secure.clublog.org/logsearch/CT1GFQ
http://carlosfonseca-ct1gfq.blogspot.com/
 

From: Ian Reeve
Sent: Wednesday, March 6, 2019 8:07 PM
To: bitx20@groups.io
Subject: Re: [BITX20] ubitx ver 4 for sale
 
Thank-you Peter,I look forward to hearing from you. 73. Ian M0IDR


From: BITX20@groups.io <BITX20@groups.io> on behalf of Peter Russell <peter.russell@...>
Sent: Wednesday, March 6, 2019 7:10:22 PM
To: BITX20@groups.io
Subject: Re: [BITX20] ubitx ver 4 for sale
 
OK Ian, you were first in the queue.

I'll email you direct with details etc.

Peter.



On 06/03/2019 14:49, Ian Reeve wrote:
> Hello Peter, I would appreciate some pictures please. I am interested.
> Thankyou
>
> 73
>
> Ian
>
> M0IDR
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
> ------------------------------------------------------------------------
> *From:* BITX20@groups.io <BITX20@groups.io> on behalf of Peter Russell
> <peter.russell@...>
> *Sent:* Wednesday, March 6, 2019 1:51:51 PM
> *To:* BITX20@groups.io
> *Subject:* [BITX20] ubitx ver 4 for sale
> After serious deliberation, I have decided to sell my ubitx transceiver.
> I have done Raj's mods - the 45 Mhz filter inductors replaced by smd's,
> the new filter in front of the second mixer and the 2 resistors have
> been changed to increase the gain.
> I have also added the N6DT agc mod and a TDA2030 audio amp.
> It was changing the smd's that did it!
> I'm getting a bit too long in the tooth to be able to handle these
> little beggars, Apart from that, since I retired I don't have access to
> a spectrum analyser or any other form of sophisticated equipment.
> I have enjoyed putting this together - it's rekindled my interest in ham
> radio, but I do know my limitations.
> It comes in a pretty blue (Chinese) box complete with a Nextion 2.8 display.
> The receiver works very well and as far as I'm aware, the transmitter is
> ok, although I've never had the confidence to put it on the air.
> I'm asking £80 for it and that will include UK shipping.
> Photos available on request.
>
> Peter, G8FWY
>
> ---
> This email has been checked for viruses by AVG.
> https://www.avg.com
>
>
>
>
>




Sem vírus. www.avg.com

Re: New V5 with poor carrier suppression.

Mike
 

Thanks Bill!

  I adjusted mine to 11.055.3 and The carrier is greatly diminished!

Thanks for all who responded

73's

Mike WA3O