Date   
Re: BITX QSO Afternoon/Night, Sunday, March 4, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Richie Chambless
 

I thought I heard KN4AIE calling, but some really strong stations are on 7.275 drowning everything else out.

Re: BITX QSO Afternoon/Night, Sunday, March 4, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

Worked Tom (VE3THR) as usual! He was anywhere between 4x4 and 5x8 here.
--
John - WA2FZW

Transmit/Receive offset

davidaker@...
 

I just got my ubitx up and going a couple of days ago.  On CW when I tune a frequency and then transmit, the frequency on Reverse Beacon shows a difference of about 900 kH.  Is there normal?
Thanks,
David
K0PD

Re: BITX QSO Afternoon/Night, Sunday, March 4, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

V Zecchinelli
 

I'm on but very quiet.


On 3/4/2018 3:07 PM, John P wrote:
I'm On 7277. Very quiet. Hardly even any noise. Anyone else out there?
--
John - WA2FZW

Re: BITX QSO Afternoon/Night, Sunday, March 4, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

I'm On 7277. Very quiet. Hardly even any noise. Anyone else out there?
--
John - WA2FZW

Re: ubitx order

V Zecchinelli
 

I think they are up to around January 4 order date.


On 3/4/2018 2:53 PM, davekn4ok via Groups.Io wrote:
Hi Group,

I ordered a ubitx Feb 11th and went with the DHL shipment.   Have not seen it yet and was wondering if anyone else is still waiting?

Dave KN4OK

ubitx order

davekn4ok@...
 

Hi Group,

I ordered a ubitx Feb 11th and went with the DHL shipment.   Have not seen it yet and was wondering if anyone else is still waiting?

Dave KN4OK

Re: BITX Adj power output

Jens / DH1AKY
 

Hi Don,

same as me: see my thread here https://groups.io/g/BITX20/message/39949 on the picture at the left there is a Chinese step-up-converter for PA power mounted. I don't have it powered yet because I first liked to get the BITX40 working without that.

73 Jens/DH1AKY

Re: New file uploaded to BITX20@groups.io

Dexter N Muir
 

I've mentioned this before, and I'm disappointed our coding gurus haven't picked up on it (or did I miss a lucid and valid rebuttal?):
How about a mouse driver?
A mouse has a scroll-wheel (and most can have their detent adjusted/removed to taste), and 2 or 3 buttons. Either tethered - hard-wired or plug-in (we're already accustomed to their use - the difference would be like the different 'feel' of a bug/paddle vs straight key, and a quick dab of the appropriate near-to-the finger button vs reach to the panel's distraction) - or rip it apart and use the bits.
Applicability universal if it fits - shouldn't take up too much space. Most are based on one or two devices, should be easily distinguishable.
Extra: More I/O freed.

73
Dex, ZL2DEX

Re: Is BITX20 Version 3 still worthwhile?

Jerry Gaffke
 

I'd recommend getting that kit going as originally documented, ,then adding mods as you see fit.
Neither the stock BItx40 or uBitx currently being sold by hfsignals has AGC.

Could try the Si5351/Nano based Raduino if you decide the original VFO is too unstable.
There are several different designs available through the forum now if you can't get one from hfsignals.
Primary advantages of vari-cap tuning are that it is smaller, lighter, and cheaper, but might be less stable.

Nothing else jumps out at me as needing a change, though I have never messed with that particular version.

For those trying to follow the discussion, here's one place that Sunil's V3 Bitx20 is documented:
   http://golddredgervideo.com/kc0wox/bitxver3/bitx20version3.htm
Likely something more authoritative posted by Sunil somewhere.

Jerry, KE7ER


On Sun, Mar 4, 2018 at 10:11 am, <jim.farrant@...> wrote:
I purchased a Version 3 kit from Sunil in 2008 with the DL4YHF frequency counter, but a change of job and two house moves has left the project untouched.  Retirement now gives me time to go back to it, but catching up on the messages in this group I can see that things have moved on!

Is building the Version 3 still a worthwhile project, or would I be better to scrap the PCBs and build the latest version?  [A lot of the components that I accumulated for the earlier job appear unaltered in the circuit diagrams for the latest version].

I can see that some refinements to the original, [such as vari-cap tuning] could be incorporated without too much trouble, but I don't know if other improvements such as the AGC are compatible with the original design.

I would be grateful for any advice, thank you

Re: No detent rotary encoder

Jose Matos
 

Thank you for your support 
I will try take off the detent like the KEN VA3ABN instructions or buy one Clarostat model
best Regards
73
José
CT1FKN
PS: UBitx is a great nice radio......

On Air

R S
 

I just finished making my 16 pin assembly and turned my ubitx on.  Receiving on 40 meters very well and very very quiet background noise.  S9 (determined by an ear tuned to it) from the state of Washington into North Carolina using a 10 wire 160m - 6m Inverted V at 70 feet-single coax fed.  SWR is dead on throughout 40 meters using my MFJ 269C Pro analyzer.

I wired a 4 pin mic and may not have the TX right causing it not to TX.  It does break the receive while TX and the TX indicator light on the Raduino does light.  No signal indicated on the watt meter, set at 20 watts.  I may have wired the key and mic wrong.  I used two mono jacks for key and speaker and each of those the ring is to ground.  Not using the speaker jack at all yet.  so, more studying to do before I make a change.

Will be listening, if nothing else, tonight on the ubitx at 7.277 MHz. and will reply here with signal report about your transmissions, if it is allowed here.

Thanks for all your help folks,
Glad this group is here.
Ron KJ4FFG in North Carolina

Is BITX20 Version 3 still worthwhile?

james766560
 

I purchased a Version 3 kit from Sunil in 2008 with the DL4YHF frequency counter, but a change of job and two house moves has left the project untouched.  Retirement now gives me time to go back to it, but catching up on the messages in this group I can see that things have moved on!

Is building the Version 3 still a worthwhile project, or would I be better to scrap the PCBs and build the latest version?  [A lot of the components that I accumulated for the earlier job appear unaltered in the circuit diagrams for the latest version].

I can see that some refinements to the original, [such as vari-cap tuning] could be incorporated without too much trouble, but I don't know if other improvements such as the AGC are compatible with the original design.

I would be grateful for any advice, thank you

Jim M0GJD

Re: No detent rotary encoder

Vince Vielhaber
 

You will have to modify the code. To get one of these to work on another project, I had to take only one in fifty pulses. Anything less and it was impossible to fine tune.

Vince.

On 03/04/2018 11:01 AM, Jose Matos via Groups.Io wrote:
Thank you Jack

Maybe like this
one: https://www.ebay.es/itm/Rotary-Encoder-400P-R-6mm-Incremental-Optical-Shaft-Working-Measurement-5-2-Y7Y6/222680935869?hash=item33d8d16dbd:g:BFgAAOSwy~BZ7060
but dont this have a high encoder rate (400) too high for the raduino code?
73
José

Re: No detent rotary encoder

Jack, W8TEE
 

With a human turning the encoder shaft, I'm pretty sure that the Nano could easily keep up. However, I would think one with that granularity (i.e., 360 degrees / 400 steps per revolution = 0.9 degrees per move) would be a little fussy to use without modification to the software. Think about it. It's common to have a one detent move on a "detent" encoder to be associated with a 1KHz frequency change. Therefore a 9 degree rotation would cause a 9KHz change. Even if you were at the 40M band start (i.e., 7.0 MHz), a single revolution puts you at 7.4MHz; outside the band in the US. A minor software change can fix this, but I would think it would need to be changed or you would need to work with lower increments.

Jack, W8TEE



From: Jose Matos via Groups.Io <ct1fkn@...>
To: BITX20@groups.io
Sent: Sunday, March 4, 2018 11:01 AM
Subject: Re: [BITX20] No detent rotary encoder

Thank you Jack

Maybe like this one: https://www.ebay.es/itm/Rotary-Encoder-400P-R-6mm-Incremental-Optical-Shaft-Working-Measurement-5-2-Y7Y6/222680935869?hash=item33d8d16dbd:g:BFgAAOSwy~BZ7060
but dont this have a high encoder rate (400) too high for the raduino code?
73
José



Virus-free. www.avast.com

Re: No detent rotary encoder

Ken
 

I just uploaded a 2 page PDF  Encoder Adjust Detent. Go to files section and search on detent.

73 Ken VA3ABN

On Sun, Mar 4, 2018 at 9:44 AM, Jose Matos via Groups.Io <ct1fkn@...> wrote:
Hi DR OMs

Anyone can give me some info where can I find a Rotary encoder with NO detent because in ebay I only found
rotary encoders WITH detent ( 20 /30 detent per rotation) and my uBitx encoder is broken.

best 73

José


New file uploaded to BITX20@groups.io

BITX20@groups.io Notification <BITX20+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20@groups.io group.

File: Encoder Adjust Detent.pdf

Uploaded By: Ken

Description:
How to adjust encoder detent

You can access this file at the URL:
https://groups.io/g/BITX20/files/Encoder%20Adjust%20Detent.pdf

Cheers,
The Groups.io Team

Re: troubleshooting no TX SSB #ubitx #ubitx-help

Jerry Gaffke
 


If you don't have a low pass filter for 160 meters between the rig and your dummy load,
then the scope will be showing any second harmonic coming out of the final.
That could be why it looks "weird", and you would not be legal to transmit without an appropriate filter.
The rig only has filters suitable for use down to 80 meters.

Yes, 3v peak is kind of anemic, could be anything between the mike and the IRF510's.
Or the 10x switch on your scope probe, that would fully explain this.
I'd recommend you concentrate on 80m, where your scope should work well.
While transmitting CW, what is the RF pk-pk signal voltage you see at Q90,911,92,94 base or gate?

Check current into PA-PWR while transmitting SSB with no audio at the mike, should be around 200ma.
If anywhere near, leave the IRF510 bias adjustments at RV2,RV3 as they are.

There is considerable variance on output power for these rigs, would be interesting to someday figure out why. 
Increasing power is best done by increasing drive at RV1 or adjusting the gain of the mike amp at Q6.
But be sure your transmitted signal remains clean, overdriving the final will make it non-linear.
Though yours is more than an order of magnitude lower than it should be, so something else is wrong here.

Jerry, KE7ER


On Sun, Mar 4, 2018 at 07:47 am, John wrote:
Well end of this week my TDA2822L and the sockets arrived so I could continue with my search.
I measured the antenna output with my scope parallel at my dummyload in the frequency ranges that I am allowed to use as General.
I measured from 160 meters to 15 meters. Strongest output is at the lower bands at 160 meters I have an amplitude of about 5V only the signal looks weird (hence I guess they mention you can not use it that low). Although at 2MHz it is almost a sinewave.
At 80 meters it is a sinewave with CW key down and an amplitude if about 3.2V. At the end of 80 meters output is a little higher.
At 60 meters 5.332 output us about 3.6V to end up with about 2.6V at 5.405.
40 meters give a fairly flat 3V drom low to upper frequency. 
At 30m (which would be the edge of my scope) I get a little over 2V.
I continued measuring and have about 2.4 at 20m.
At 17m about 1.8V.
At 15 m about 1.8V too.
These are all peak values.

They seem a little low to me. As I understand a 4V peak value would give about 160mW.
But at least there is some RF arriving at my dummyload. I also tested with voice and that seems to be working too, but with a little lower values.

I was using for this test a switched power supply 12V 5A. Output voltages is about 12.3V.

So everything seems to be working only the output is a little low. Could this be a bias issue? Haven't touched those settings yet.

John

Re: No detent rotary encoder

Ken
 

Someone earlier wants detent-less encoder.

On Sun, Mar 4, 2018 at 11:37 AM, Praba Karan <vu3dxr@...> wrote:
what is the issue with detents?

On Sun, Mar 4, 2018 at 9:40 PM, Ken <chase8043@...> wrote:
I've been able to open the ones with detents and adjust the spring for no clicks. There are sites that show you how to do it.

73

Ken VA3ABN.

On Sun, Mar 4, 2018 at 11:01 AM, Jose Matos via Groups.Io <ct1fkn@...> wrote:
Thank you Jack

Maybe like this one: https://www.ebay.es/itm/Rotary-Encoder-400P-R-6mm-Incremental-Optical-Shaft-Working-Measurement-5-2-Y7Y6/222680935869?hash=item33d8d16dbd:g:BFgAAOSwy~BZ7060
but dont this have a high encoder rate (400) too high for the raduino code?
73
José





--
D.Prabakaran 
VU3DXR


Re: No detent rotary encoder

Praba Karan
 

what is the issue with detents?

On Sun, Mar 4, 2018 at 9:40 PM, Ken <chase8043@...> wrote:
I've been able to open the ones with detents and adjust the spring for no clicks. There are sites that show you how to do it.

73

Ken VA3ABN.

On Sun, Mar 4, 2018 at 11:01 AM, Jose Matos via Groups.Io <ct1fkn@...> wrote:
Thank you Jack

Maybe like this one: https://www.ebay.es/itm/Rotary-Encoder-400P-R-6mm-Incremental-Optical-Shaft-Working-Measurement-5-2-Y7Y6/222680935869?hash=item33d8d16dbd:g:BFgAAOSwy~BZ7060
but dont this have a high encoder rate (400) too high for the raduino code?
73
José





--
D.Prabakaran 
VU3DXR