Date   
Re: PTT activates menu...

Biju Apkrcl
 

De VU2TDD

 This problem arises due to feedback from linier power amp. Keep away the PA and try

On Mon, 25 Nov 2019, 09:40 Russ KR0EHM, <russ@...> wrote:

I’m having exactly the same problem that I just noticed today but the is the first day I did some real SSB so held down the PTT.

I have the VU3SUA case but not the Nextion display. Do you have the case too? I read on another thread about the volume control being finicky with unintentional grounding because of case flex. I’m going to check that out on mine because I’ve noticed the volume control and mic cutting out on mine if I move it while it’s on.  I have a Uniden mic, the cheapo electret version from Amazon that fit the 4 pin CB XLR that came with the case.

if that’s not it then I hope for both of us my reply to bump your thread gets some attention!

here is the link to the other thread:
https://groups.io/g/BITX20/topic/59354776#72943

Re: PTT activates menu...

Russ KR0EHM
 

I’m having exactly the same problem that I just noticed today but the is the first day I did some real SSB so held down the PTT.

I have the VU3SUA case but not the Nextion display. Do you have the case too? I read on another thread about the volume control being finicky with unintentional grounding because of case flex. I’m going to check that out on mine because I’ve noticed the volume control and mic cutting out on mine if I move it while it’s on.  I have a Uniden mic, the cheapo electret version from Amazon that fit the 4 pin CB XLR that came with the case.

if that’s not it then I hope for both of us my reply to bump your thread gets some attention!

here is the link to the other thread:
https://groups.io/g/BITX20/topic/59354776#72943

Re: Troubleshooting uBitx - newbie #ubitx-help

neknosbig@...
 

Thanks everyone - once I slowed down and put everyone's comments together, I have it receiving quite well now.  I skipped the enclosure PCBs and just ugly wired everything.  Next step will be to put a microphone together and test TX on both the mic and the key. -Ken/N7ELF

Re: AUDIO FILTER

howard winwood G4GPF
 

just integrated a sotabeams af filter in my ubitx v5, you need the lm386 amp circuit sotabeams show in their instructions to provide audio to the speaker.
the original lm386 on the main ubitx board provides the input to the sotabeams filter.
this means you now have 2 volume controls, one controls the input to the filter, i.e set level, the other controls the final audio output.
just ordered a dual coax (concentric) 10k pot prom China, as I do not have room for two separate pots.

Re: V5 Rcv cuts out

 

Hi,

If the relay passes only small signals and nothing else, then it must have some kind of contact maintenance current -- even high quality ones need this.

Here is a service bulletin for one of their transceivers needed adding on because they forgot to do this:  https://www.qsl.net/wb4kdi/Kenwood/TS-430S/Service%20Bulletins/asb0902.html  The bulletin has info on both cleaning the contacts and then setting up the circuit.

The Icom IC-730 also needed a circuit added on for the pre-amp relay which went out too because it switched only small signal and had no maintenace current.

I'm sure such a circuit could be added on to the ubitx if desired.

73,


Mark.

Re: V5 Rcv cuts out

andy@...
 

I should have said it cuts out but greatly reduced signal. Signals are not completely gone. If signals completely dissappeared i would suspect something else.

Re: AUDIO FILTER

 

I have a version 4 and ran my audio feed directly into the sota beams dsp and then added an audio amplifier following the dsp. Version 4 has notoriously low audio output on its own. So, I suspect when using the dsp with version 5, you may need to insert the dsp in the audio chain prior to the final audio amp to prevent overdrive clipping.

David Posthuma
WD8PUO

 


From: bitx20@groups.io on behalf of Dan Pflugrath <dpflugrath@...>
Sent: Sunday, November 24, 2019 2:57 PM
To: bitx20@groups.io
Subject: Re: [BITX20] AUDIO FILTER
 
After watching a talk on DSP I am considering trying it in my bitx.  One caution is  the level of audio required on the input.   I currently run one bitx with the NESCAF which is an amazing filter for CW but had to feed it with the audio output from the bitx.  We may need a stage of amplification ahead of the sotabeams DSP filter

Re: AUDIO FILTER

Dan Pflugrath
 

After watching a talk on DSP I am considering trying it in my bitx.  One caution is  the level of audio required on the input.   I currently run one bitx with the NESCAF which is an amazing filter for CW but had to feed it with the audio output from the bitx.  We may need a stage of amplification ahead of the sotabeams DSP filter

Re: AGC problems

Justin Phillips K5AXL
 

May not be related but have a look at:

https://groups.io/g/BITX20/topic/52738727#72893

V5 Rcv cuts out

andy@...
 

uBitx V 5.0 rcv cuts out. Click the PTT and it comes back. May stay or cut out again. 
Poor relay suspected. hfd27/012-s is used for all.
Using relay for small signal is not always ideal as contacts actually do better when actually passing some current. This is an issue when using for switching low level audio as well.
   I use 80 meters mostly so assuming its relTed to one relay.
Some hardware will "exercise" the relays by rapidly switching them on and off to "clean" them. 
I have recovered relays on the bench with a 555 and driving them on and off at a high rate for awhile to recover them.
Old ts430 and 440 relays suffered the same woes especially if radio sits for a year or so at a time and not used.
I suspect old stock and vertually no current to get contacts working.  This is not uncommon.
Is there better relays? Omron? 
VE6KP ANDY

Re: Band pass filter

Preston
 

I got the inductor put in today but I'm still experiencing a very high noise floor. I'll probably have to get out of town and try it away from so many people.


On Sun, Nov 17, 2019, 5:35 PM harry latterman via Groups.Io <harrylatterman=yahoo.com@groups.io> wrote:
On Sunday, November 17, 2019, 4:26:34 PM MST, Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io> wrote:


A one micro-Henry inductor.
Any of these should do:
    https://www.mouser.com/Passive-Components/Inductors-Chokes-Coils/Fixed-Inductors/_/N-wpczZ1yzvvqx?P=1z0wrifZ1z0z819Z1z0t1roZ1y972db


On Sun, Nov 17, 2019 at 03:04 PM, Preston wrote:
what is a  1µH  and where do I get one?

Re: Ubitx v6

M0OOZ
 

In my opinion, the bitx40 represents the all time best version. All attempts at additional circuitry detract. Indeed, with each additional circuit, the performance reduced 180dB in terms of both function and usability. 

The demise of bitx40 production, is very sad, as this radio is awesome. 

Seeing as bitx40 uses the same components, I don't see why the board is retired and now sold only by Sunil @ non preferred prices. 


May the peace be with you

M0OOZ

On Fri, 22 Nov 2019, 17:11 Ashhar Farhan, <farhanbox@...> wrote:
I'll buy one!

On Fri 22 Nov, 2019, 4:02 PM CiccioSamui, <Cicciosamui@...> wrote:
Stay bold the ubitx v6 is coming..... 
With agc preampifier cw filter and much more.... 

Re: Ubitx v6

CiccioSamui
 

On Sat, Nov 23, 2019 at 07:49 PM, Richard Spohn wrote:
Ciccio, PLEASE use your name for this version of the radio. It is not
a "uBitx6". IMHO only Farhan is entitled to use a new revision number
for this radio. - Rich

 
it seems to me that there is more concern in the name than in the project.
it was not my intention to remove author and paternity rights
I don't know I'm a little puzzled.
I thought we were talking about radio.

Re: Ubitx v6

Richard Spohn
 

Ciccio, PLEASE use your name for this version of the radio. It is not
a "uBitx6". IMHO only Farhan is entitled to use a new revision number
for this radio. - Rich

On 11/23/19, Mark - N7EKU <@N7EKU> wrote:
Hi Ciccio,

You misunderstood me!  I was just suggesting you could use your name as a
version because you are putting a lot of effort into it ☺

I salute your effort!

Mark



AGC problems

Mike WA0YCN
 

I thought I had the AGC board that came with my amateurradiokits Nextion Case wired correctly, but although it seems to be managing gain level, I’m not sure. I noticed that as I adjust the volume higher, the S meter level goes up (as if it was a volume level meter).  I have the audio input of the AGC board wired to the connector labeled AGC V on the audio amp.  That wouldn’t seem to be correct since that Is essentially the speaker output from the ubitx (which would vary based on volume level). The instructions provided for the board indicate that the audio input connection should be to the high side of the volume pot, which makes sense.  However, when I try connecting there, it mutes my audio. 


Would anyone be able to offer some assistance please?

Thanks. 


Mike

Re: Does anybody know how to calibrate CEC firmware ?

Russ KR0EHM
 

I am going to reassure myself of yesterday. Today was much better, and I think exploring the bands at different times and the full range of my antenna has helped.
I had more luck with WSPR and also finally got some CW spots on the RBN.  My CW spots seem to be 200hz off of what I’d expect. Is this within what would be expected or should I be able to see spot on spots?
Thanks to everyone here who reads and replies to newbs like me!

Re: Ubitx v6

Arv Evans
 

Resolution looks good now.
Thanks 

Arv. K7HKL
_-_


On Sat, Nov 23, 2019, 3:08 AM CiccioSamui <Cicciosamui@...> wrote:
ok this is the latest version of the project. the RF section is still missing.
also some connections have not yet been finished.
the link to the diagram below
https://drive.google.com/file/d/1ibuL8xJD72zfQZhnYpiMkiXWGO-9LlDL/view?usp=sharing

Re: µBitx v3 For Sale

VISWANATHAN R ELAYIDOM
 

Its available for 4k at Lamakkan hamfair 2019


On Sun, Nov 24, 2019, 12:09 AM ON7HC <herman.docx@...> wrote:

FOR SALE µBitx v3. Unbuild and unopenend package.
€75, Free shipping to Benelux countries (with tracking).
 
Shipping cost will be applied for other European countries.


73, Herman


--
Which is the latest version

µBitx v3 For Sale

ON7HC
 


FOR SALE µBitx v3. Unbuild and unopenend package.
€75, Free shipping to Benelux countries (with tracking).
 
Shipping cost will be applied for other European countries.


73, Herman

Re: Ubitx v6

CiccioSamui
 

On Sat, Nov 23, 2019 at 07:37 AM, Mike WA0YCN wrote:
Sforzo impressionante.  Non vedo l’ora di vedere di piu.
Grazie, è da maggio che ci sto lavorando insieme ad un mio amico, spero a gennaio di finire