Date   
Re: 2 meter bitx possible?

n5ib_2
 

It would be tough.
One important factor is that in moving from HF to VHF, at least here in USA, the spectral purity requirements are ratcheted up by an order of magnitude - from 43 dB down from the fundamental when below 30 MHz, to 54 dB for VHF.

N5IB

Re: JackAl Board Debut

W2CTX
 

On May 24, 2018 at 1:02 PM Richard E Neese <kb3vgw@...> wrote:

https://www.ebay.com/itm/STM32-Board-STM32F407ZGT6-4-3-Touchscreen-2-4GHz-RF-IR/172949104559?hash=item284491e7af:g:CP0AAOSw4nhZ8gzx

will this board work with your firmware ? I was thinking with all the pinouts I can do alot

Re: JackAl Board Debut

Richard E Neese
 

https://www.ebay.com/itm/STM32-Board-STM32F407ZGT6-4-3-Touchscreen-2-4GHz-RF-IR/172949104559?hash=item284491e7af:g:CP0AAOSw4nhZ8gzx

will this board work with your firmware ? I was thinking with all the pinouts I can do alot

Re: RF power chain mods and improvements..

Jerry Gaffke
 

This post says the uBitx is using either the 45m15a (2 pole) or 45m15b (4 pole) for the 45mhz filter.
   https://groups.io/g/BITX20/message/33203
This post says it's the 2 pole 45m15a from WTL
  https://groups.io/g/BITX20/message/33260

I can't find a WTL data sheet, but here's one from Fox, their 45m15a is toward the bottom of page 2:
    https://www.mouser.com/ds/2/160/filters-15543.pdf
It's +/- 7khz on the 3dB bandwidth, +/- 28 khz for an 18 dB stopband
So we're going from roughly 3dB to 18 db while transitioning across 28-7.5=20.5 khz.
If that were linear (it's not), a 2khz chunk of that skirt would have a variance of (18dB-3dB)*2khz/20.5khz = 1.46dB
Might be less, if the attenuation we need is on a part of the skirt where it's changing a bit more slowly. 

My hearing is shot from chainsaws and tractors and such.  
But audio sounded about the same to me most anywhere on the skirt

I'll try to take some measurements later today.

Jerry



On Thu, May 24, 2018 at 07:55 am, Jerry Gaffke wrote:
I haven't measure the filter bandpass.
But just listening to it, it sounded ok to my ears, even when going way down the skirt.
And as I recall, I had to crank it over more than 2k khz before it seemed to be attenuating noticeably.
Busy now, but will take another look at that today.
Do you have a datasheet for the filter being used that you can point me to?

Jerry

Re: Firmware Questions

Ralph Mowery
 

You should build the radio and see if it works first.  Then save the original configuration to a file.  This is so that if you start to do a calibration and something goes wrong you can start from the beginning again.  To use the new firmware with an s-meter you will have to install a hardware modification to make that work.  

You may or may not have to do a calibration on the radio as it is suppose to be calibrated at the 'factory'.  

Go here and read a lot about the ubitx.

Look at the kd8cec firmware.  It will have a couple of modifications that make the radio more convenient to use and info about an s-meter circuit and automatic volume control.



On Thu, May 24, 2018 at 12:14 PM, Curt M. <Kc3hjp@...> wrote:
Hi guys, getting ready to assemble my new uBitx. There’s a ton of information on the site but I’m afraid I may miss something if I don’t as a question or two. I take it that once I power the radio on I’m going to have to do some sort of calibration. I say this because I think I read where if you upgrade firmware some of the other firmwares my not have the ability to do this initial calibration. I was reading some stuff online while I was just about to goto sleep so maybe I misinterpreted what I read. 

So I guess my question is and I expect that it will be debatable but what seems to be the best firmware to use and what do I have to do with calibration? It would be nice to have something with a S meter and I’m not sure that I’ll use the radio on digital modes as far as I know. I have other radios for that.  I think the stock firmware does not have an S meter on the display. 

With my Bix40 I installed the front end protection diodes and a capacitor which I believe was to take care of some harmonics. After that I just used the radio. I stopped upgrading firmware after the release of firmware that was supposed to take care of the pop when keying up. I think the firmware after that was going to require some hardware mods and I didn’t see the benefit of doing that since I had a radio that operated very well. I see me using the uBitx and probably not modifying any further. 
_._,_


Re: Firmware Questions

Doug W
 

I very, very, very strongly suggest you first build the radio and use it with the stock firmware.  The stock firmware is perfectly functional and should you run into any problems or issues with your radio you'll have one less variable to troubleshoot.
--
www.bitxmap.com

Re: Power of rf #ubitx #ubitx-help

Daniel Conklin <danconklin2@...>
 

You might try checking out the thread related to this:  https://groups.io/g/BITX20/message/48158

Re: CW Transmit Frequency VS Sidetone setting #radiuno #ubitx #ubitxcw #firmware

Daniel Conklin <danconklin2@...>
 

In the CEC firmware manager there is a field to change the CWL, CWU displayed frequency, and there is also a field to change the side tone frequency.  You can also adjust the CW BFO separately from the SSB BFO.  I suspect all of those settings are interactive.  I haven't played with them much yet, but as I was reading your posts I wondered if you could set the side tone to -800 HZ.  I might try playing with all of the CW settings later this evening.
Dan, W2DLC

Firmware Questions

Curt M.
 

Hi guys, getting ready to assemble my new uBitx. There’s a ton of information on the site but I’m afraid I may miss something if I don’t as a question or two. I take it that once I power the radio on I’m going to have to do some sort of calibration. I say this because I think I read where if you upgrade firmware some of the other firmwares my not have the ability to do this initial calibration. I was reading some stuff online while I was just about to goto sleep so maybe I misinterpreted what I read. 

So I guess my question is and I expect that it will be debatable but what seems to be the best firmware to use and what do I have to do with calibration? It would be nice to have something with a S meter and I’m not sure that I’ll use the radio on digital modes as far as I know. I have other radios for that.  I think the stock firmware does not have an S meter on the display. 

With my Bix40 I installed the front end protection diodes and a capacitor which I believe was to take care of some harmonics. After that I just used the radio. I stopped upgrading firmware after the release of firmware that was supposed to take care of the pop when keying up. I think the firmware after that was going to require some hardware mods and I didn’t see the benefit of doing that since I had a radio that operated very well. I see me using the uBitx and probably not modifying any further. 

Re: Rarduino board

Gordon Gibby <ggibby@...>
 

Hi thanks, Arv!


For the folks here it would likely be child's play to adopt their code to this board.   Pick which output from the Si5351 board you want and program for that.   no need to put in the op amp if you aren't trying to do the swr stuff that I was trying ( so far with only mediocre success at tiny signal levels --- but I may try jerry's pre-biased shottky idea some time )   and use this to provide DDS output.


It was my first try at DipTrace after encouragement here and was pleasantlyl surprised I made only one known goof.   I have repaired that in my stored files.    


I'm not up to selling boards etc, but i'll gladly ship the gerber zip or the source diptrace file to anyone who wants and they can handle it any way they wish.   I used pcbway I think.    I know there are much much better options of boards & kits out there however!!!


gordon




From: BITX20@groups.io <BITX20@groups.io> on behalf of Arv Evans <arvid.evans@...>
Sent: Thursday, May 24, 2018 12:04 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Rarduino board
 
Gordon

That is a herculean effort, and very impressive.  It is not often that one sees both
hardware and supporting code described at this level of detail.  For others, Gordon's
.pdf shows a slightly different code layout from the Raduino, and thus is a good read
if you are contemplating design and construction of your own Raduino or a similar
controller for BITX or other radios.

Arv  K7HKL
_._


On Thu, May 24, 2018 at 9:26 AM, Gordon Gibby <ggibby@...> wrote:

I did not make the stock Raduino, but I have gerber files for something that does basically the same thing.   You can read about it here:


http://arrl-nfl.org/wp-content/uploads/2018/05/KX4ZDDSApplicationNote.pdf


I'm sure it is rather pedestrian compared to some of the other folks here but I had fun getting it to work.   


Gordon




From: BITX20@groups.io <BITX20@groups.io> on behalf of Ralph Mowery <rmowery42@...>
Sent: Thursday, May 24, 2018 11:06 AM
To: BITX20@groups.io
Subject: [BITX20] Rarduino board
 
I thought I had saved a message that someone had some blank boards for the Raduino board.  Can not find it.

Could whoever has those blank boards contact me off list at:

rmowery28146@...

de ku4pt


Re: RF power chain mods and improvements..

Rahul Srivastava
 

Yes Jerry..!! Ditto... There is a limit to how much we can derive out of generic components.

Rahul VU3WJM

Re: Rarduino board

Arv Evans
 

Gordon

That is a herculean effort, and very impressive.  It is not often that one sees both
hardware and supporting code described at this level of detail.  For others, Gordon's
.pdf shows a slightly different code layout from the Raduino, and thus is a good read
if you are contemplating design and construction of your own Raduino or a similar
controller for BITX or other radios.

Arv  K7HKL
_._


On Thu, May 24, 2018 at 9:26 AM, Gordon Gibby <ggibby@...> wrote:

I did not make the stock Raduino, but I have gerber files for something that does basically the same thing.   You can read about it here:


http://arrl-nfl.org/wp-content/uploads/2018/05/KX4ZDDSApplicationNote.pdf


I'm sure it is rather pedestrian compared to some of the other folks here but I had fun getting it to work.   


Gordon




From: BITX20@groups.io <BITX20@groups.io> on behalf of Ralph Mowery <rmowery42@...>
Sent: Thursday, May 24, 2018 11:06 AM
To: BITX20@groups.io
Subject: [BITX20] Rarduino board
 
I thought I had saved a message that someone had some blank boards for the Raduino board.  Can not find it.

Could whoever has those blank boards contact me off list at:

rmowery28146@...

de ku4pt


Re: RF power chain mods and improvements..

Rahul Srivastava
 

Yes Alison,

I realise the extra gain issue that is why I mentioned we need to go full throttle on 10mtrs. Well these schemes will only result in loss on lower bands. I feel your approach is much more practical.

73

Rahul VU3WJM


Re: UBitx and case for sale

Fr Richard R <rickocr2005@...>
 

Sorry, my time is NOT open to outside things is what I meant...........

Fr Richard
WB8YXF




On Thursday, May 24, 2018, 11:41:14 AM EDT, Fr Richard R via Groups.Io <rickocr2005@...> wrote:


I have a new UBitx and case (from Amateur Radio Kits, Black) for sale.  The UBitx has new never been opened, parts bag still sealed.  The case is also new and never been opened, all parts still in original container.  I also have extra new TDA chips as the one on the board is the WX; I have Voltage Regulators of various types, new, in their case; a new HI-Per-Mite filtering kit, never been opened or assembled;  and a new Resister Kit with hundreds of new resistors!
Everything you need to build the UBitx and make some mods!

As it turns out I will be unable to take the time to assemble these items as things have changed in my life and my time.

I am asking $220 for all which includes shipping.  I do not wish to sell separate.  In CONUS only, please.  I take paypal to my email address.

I purchased several supplies to get ready to build these kits, many were suggested by members of this group, and I thank you all for your patience and assistance.  My Church obligations have increased thus my time is open to outside things like kit building.

Fr Richard
WB8YXF


UBitx and case for sale

Fr Richard R <rickocr2005@...>
 

I have a new UBitx and case (from Amateur Radio Kits, Black) for sale.  The UBitx has new never been opened, parts bag still sealed.  The case is also new and never been opened, all parts still in original container.  I also have extra new TDA chips as the one on the board is the WX; I have Voltage Regulators of various types, new, in their case; a new HI-Per-Mite filtering kit, never been opened or assembled;  and a new Resister Kit with hundreds of new resistors!
Everything you need to build the UBitx and make some mods!

As it turns out I will be unable to take the time to assemble these items as things have changed in my life and my time.

I am asking $220 for all which includes shipping.  I do not wish to sell separate.  In CONUS only, please.  I take paypal to my email address.

I purchased several supplies to get ready to build these kits, many were suggested by members of this group, and I thank you all for your patience and assistance.  My Church obligations have increased thus my time is open to outside things like kit building.

Fr Richard
WB8YXF


Re: Rarduino board

Gordon Gibby <ggibby@...>
 

I did not make the stock Raduino, but I have gerber files for something that does basically the same thing.   You can read about it here:


http://arrl-nfl.org/wp-content/uploads/2018/05/KX4ZDDSApplicationNote.pdf


I'm sure it is rather pedestrian compared to some of the other folks here but I had fun getting it to work.   


Gordon




From: BITX20@groups.io <BITX20@groups.io> on behalf of Ralph Mowery <rmowery42@...>
Sent: Thursday, May 24, 2018 11:06 AM
To: BITX20@groups.io
Subject: [BITX20] Rarduino board
 
I thought I had saved a message that someone had some blank boards for the Raduino board.  Can not find it.

Could whoever has those blank boards contact me off list at:

rmowery28146@...

de ku4pt

Re: Raduino CAD Files

W3JDR
 

OK, I think it's fixed...sorry!

Power of rf #ubitx #ubitx-help

حمد المزين <hamad.kalid@...>
 

Hello everyone i faced problem with power on my ubitx i measure tge power with swr the maximum was 6 watt and on the 10m it was 0.7 watt !!!! How can increase the power ?

Re: Raduino CAD Files

Kees T
 

The Files section works but I see 2 page 2s

73 Kees k5BCQ

Re: Raduino CAD Files

W3JDR
 

I also uploaded the files to folder "W3JDR" in the files section.