Date   
Re: Harmonic performance - SSB vs CW

ajparent1/KB1GMX <kb1gmx@...>
 

Kees,

Why not an external board that takes RF inputs RF out to connector and has
Relay for TR, the four filters 4 more relays for switching and accepts 
the Raduino signals needed:

TX-V+  to signal transmit receive and DC to relays
TX-A, TX-B,TX-C  (filter select)

FYI if those three filter selects could be encoded for 3:8 filter selection or
2:4 decode for filter selection  Its a minor code change in the Raduino 
to do that.   Other schemes are possible as well.

Tt be bold and suggest...   Make the board the width of the uBitx and 
the right half is the filters and the left has a set of four or more
filters to insert between T2 and the power amp path to replace the 9section
low pass used.  That would help the harmonic issue and fix the spur issue.
The only issue is that as a single board there must be no shared ground
plane and any shared ground or control signals be isolated for rf.


Allison



Re: New Warning on uBITx.net

Bill Bates
 

I like it, as a Christian I am continually reminded not to pass judgment too quickly & most importantly to listen patiently to BOTH sides of the argument 😊 before doing anything, be slow to speak & quick to listen, bear with one another's weaknesses, we could all do with a little slack when it comes to being critical or too quick to criticize 😊. Bill G6ATO


From: Doug W
Sent: ‎08/‎08/‎2018 03:11 PM
To: BITX20@groups.io
Subject: Re: [BITX20] New Warning on uBITx.net

On Wed, Aug 8, 2018 at 04:39 AM, Timothy Fidler wrote:
 If I bought a S+W revolver in the US and used standard S and W  ammo and the cylinder blew out I would expect a new one or a refund. It is called "fitness for purpose" and is often used in the courts.
So to finish your analogy for you, you bought a low cost black powder kit and expect it to work exactly like an expensive complete model from a major manufacturer.

As to your courtroom argument, I agree it is fun to play lawyer many actors and actresses make a nice living at it.  Let's keep the game going.  I'll play defense since Jack Nicholson and pals are probably busy.  The scene opens to me standing in front of a big monitor highlighting the following phrase from the site where you bought your kit  "The HF Signals kits are supplied as-is without any promise that they will work to any particular specification."  Then I laugh and sit down.  It would be a short movie.
 
--
www.bitxmap.com

Re: Antenna Analizer #off_topic

Dennis Zabawa
 

I have an ELEGOO display that I am working with at the moment.  Some of the Chinese brand names are truly strange!

Re: Antenna Analizer #off_topic

 

I've been looking at the AA-30.ZERO every since it came out and am quite interested in it. It will be interesting to see where this thread goes. I too am thinking a Nextion display would be a nice addition to it.

Joel
N6ALT

Re: reverse polarity protection (ubitx.net)

Mike Yancey
 

I usually prefer the P-FET solution - prices have come down for these, around a buck per P-FET.
And not only the price, but more & more P-FETs with very low V-forward drop.

No fuse to replace (if you're 'wrong') and nearly no voltage drop (when correctly connected).

Also: consider Power Poles. Using Power Poles makes it *very* hard to mal-connect.

Mike Yancey, KM5Z
Dallas, Texas, USA

Re: Antenna Analizer #off_topic

hirosmb <hirosmb@...>
 

Yes, it is!, Allison.

I like the attitude of this Ukrainian company bcoz of releasing such a fancy device for us.

// hiro, JJ1FXF



2018/08/08 23:28、ajparent1/KB1GMX <kb1gmx@...>のメール:

For 90$ and rig expert has a proven track record of making antenna analysers its a great deal.

I may pull the trigger on that one.

Allison

Re: Antenna Analizer #off_topic

hirosmb <hirosmb@...>
 

Dennis,

What about using the Nextion LCD for your project?

Nextion LCD presents more flexibility for Arduino, I guess.

I got this AA-30.ZERO bcoz I supposed that I could measure inductance of coils.

If the uBitX’s spurious issue won’t go as most of us expecting, I am thinking of mod to switch its LPF coils for  a single band transceiver.

Are there any AA-30.ZERO reflector or blog if you know?

// hiro, JJ1FXF



2018/08/08 22:10、Dennis Zabawa <kg4rul@...>のメール:

I have one and am working on an Arduino sketch to interface it to an LCD graphic display.  I hope to package it in a 3D printed case as a battery powered,  handheld device.

Re: Harmonic performance - SSB vs CW

F1BFU - Fr - 79
 

Please look at the K5BCQ site (qsl.net) for an LPF / BDF filter unit with a switch or another with automatic switching.
BPF2D.JPG
6bandfiltera.JPG

Gilles F1BFU / FR

Le mer. 8 août 2018 à 16:23, Kees T <windy10605@...> a écrit :
OK, where do we go from here on the uBITX .....what are the plans ? As they say "whatareyouupto"

1) The simplest solution I can think of is a small board, about the size of the existing 4 LPFs with a rotary 2P 6T switch (Mouser or about $2 on eBay, etc) to select the specific LPF. Wired to the IN and OUT points on the board with RG-174 .....and all existing board wiring isolated. Use the existing components to rebuild the 4 LPFs (Possibly eliminate the 60m capability and improve the 80m response) on the new board.  

2) A more expensive solution would be to just bypass everything from T11 to K3 and run those coax cables to the outside where there is a manually switched set of LPFs (might be 5 or 6 LPFs......your design or ?)

3 An even more expensive solution would be #2 with automatic band selection, relay switching, etc.

What think you ?

73 Kees K5BCQ  

Re: Antenna Analizer #off_topic

ajparent1/KB1GMX <kb1gmx@...>
 

For 90$ and rig expert has a proven track record of making antenna analysers its a great deal.

I may pull the trigger on that one.

Allison

Re: Harmonic performance - SSB vs CW

Kees T
 

OK, where do we go from here on the uBITX .....what are the plans ? As they say "whatareyouupto"

1) The simplest solution I can think of is a small board, about the size of the existing 4 LPFs with a rotary 2P 6T switch (Mouser or about $2 on eBay, etc) to select the specific LPF. Wired to the IN and OUT points on the board with RG-174 .....and all existing board wiring isolated. Use the existing components to rebuild the 4 LPFs (Possibly eliminate the 60m capability and improve the 80m response) on the new board.  

2) A more expensive solution would be to just bypass everything from T11 to K3 and run those coax cables to the outside where there is a manually switched set of LPFs (might be 5 or 6 LPFs......your design or ?)

3 An even more expensive solution would be #2 with automatic band selection, relay switching, etc.

What think you ?

73 Kees K5BCQ  

Re: need a new pc ??

Howard Fidel
 

Have you posted the design? It sounds interesting.

Howard

On 8/7/2018 11:44 PM, Doug W wrote:
On Tue, Aug 7, 2018 at 07:49 PM, Howard Fidel wrote:
If you have an interesting project for it that can't be done with an Arduino, I'd like to hear about it.
I missed responding to that part of your post.  I am currently running it as a WSPR beacon in my detached garage.  I am using the shield from TAPR.  I can remote into the ZeroW with my phone via VNC and maintain control.  The RF used to knock out the wifi but I separated the shield with jumper wires and it works fine.  I am not saying you couldn't run WSPR from an Arduino, but I think you'd be hard pressed to get the same functionality for $10.
 
--
www.bitxmap.com


Re: Antenna Analizer #off_topic

hirosmb <hirosmb@...>
 

bob,

It’s a new type of Arduino which seems very exciting to me.

Thanks for your input.

// hiro, JJ1FXF



2018/08/08 21:04、bobh_us <rwhinric@...>のメール:

hiro,

I have one.  It is on my project TODO: for this winter.
I’d like to add a wireless adapter for a phone or M5stack.com display.

bob
wm6h

Re: One question only...

Ralph Mowery
 

When I was working part of my job was the calibration of instruments for a company that made polyester material. We had equipment that was sent off on a schedule to check it met standards.  Our on line instruments were verified by those.

You have to know the limitations of the equipment.  I had a good discussion with a production engineer on this.  He cold not understand why the computer readout that was showing 3 decimal places of temperature at about 300 deg C was off by 2 whole numbers.  All this was coming from a probe that had 2 RTDs and 2 thermocouples  in the same 1/2 inch tube.  He wanted to know which one was correct.  I told him to take his choice as they all were.  The TC and rtd were only rated at 2 deg C at that temperature by the makers.  Then each went through a sending unit  that was calibrated to 1/2 of a percent or less, then to the computer unit that had about the same error.  When all the errors were added together we were lucky to get with in 1 % , mostly 2 %.  However we could read to 3 decimal places.

The whole point is that with most parts used in the uBITX and other ham grade equipment is only 5 % or maybe even less, it is pointless to measure a filter cutoff at 12 MHz to within a couple of cycles or a db down.  You may be able to build one that way, but not mass produce them.

I found the filter in my uBITX was too sharp for me and the audio quality on transmit was not what I wanted.  I Changed the capacitors in the filter area  with some standard components.  I can, but did not measure to 10 hz or less, but did get a general overall curve that met my standards, and my friends I talk to all the time said it sounded very good to them.

de ku4pt


On Wed, Aug 8, 2018 at 1:34 AM, m5fra2 via Groups.Io <m5fra2@...> wrote:

Alison,

 

I should explain, it used to be my job, the repair and re-cal of scopes and spectrum analysers. It is different in a commercial/safety critical environment but without decent calibration you are working blind. Agreed, for amateur use there is a need to know where you are, roughly, and it all goes with knowing how to use the gear. Not saying that any of the tests done on the LPFs are wrong or that people do not know what they are doing but I think all users should be aware of the issues when using such gear.

 

Colin – M5FRA

 

Re: New Warning on uBITx.net

Doug W
 

On Wed, Aug 8, 2018 at 04:39 AM, Timothy Fidler wrote:
 If I bought a S+W revolver in the US and used standard S and W  ammo and the cylinder blew out I would expect a new one or a refund. It is called "fitness for purpose" and is often used in the courts.
So to finish your analogy for you, you bought a low cost black powder kit and expect it to work exactly like an expensive complete model from a major manufacturer.

As to your courtroom argument, I agree it is fun to play lawyer many actors and actresses make a nice living at it.  Let's keep the game going.  I'll play defense since Jack Nicholson and pals are probably busy.  The scene opens to me standing in front of a big monitor highlighting the following phrase from the site where you bought your kit  "The HF Signals kits are supplied as-is without any promise that they will work to any particular specification."  Then I laugh and sit down.  It would be a short movie.
 
--
www.bitxmap.com

Re: uBITX portable build #ubitx

Bob KB1TEK
 

Great Job, Dan!

I have something related in the works.....

Hope to share it soon.

Re: New Warning on uBITx.net

p.gould1@sky.com <p.gould1@...>
 

To Bill G6ATO & John N3ODE. Well said! I probably had more enjoyment building a snazzy enclosure than possibly anything I can remember. Just built the V4 ubitx and yes the rx audio is horrible to say the least, but it works!! It appears to work better at night which suggests to me that it may be the ubitx does require a better than average antenna to unleash it's potential. At the moment I use a folded dipole, 12 metres long and very low, about 7 m running down to about 4m no tuner no balun and centre fed with co-ax. And I've managed 1500 miles in the early evening with my other 2 watter. By the by, my thanks to Dave G4ADY for suggesting a firmware update for keying problems, worked a treat! 73 to everyone Paul M6FEU
--------------------------------------------

On Wed, 8/8/18, Bill Bates <billy.bates@...> wrote:

Subject: Re: [BITX20] New Warning on uBITx.net
To: BITX20@groups.io
Date: Wednesday, 8 August, 2018, 13:50

My
thoughts exactly ! Less is more, so much more fun to get
contacts o a few watts than shop bought kit & a hundred
watts 😊, Bill G6ATOFrom:
@JTURN
Sent:
‎08/‎08/‎2018 01:09
PM
To:
BITX20@groups.io
Subject:
Re: [BITX20] New Warning on
uBITx.net

As a tech class amateur I cannot
justify a full featured radio with the limited bandwidth
available to me.  I want to upgrade to general class which
will open all bands and a dramatic amount of
bandwidth. 

This unit has allowed me to dip my toe
into HF and learn a bit more of the theory which I lacked
working UHF and VHF FM for 25 years.  I am hooked on QRP
operation and will learn much more using this radio in low
power for discovery of good antenna systems. 

Simple is beautiful and a unit with
one button, one knob, and a tuner is quite pretty to
me. 

John N3ODE

Re: Antenna Analizer #off_topic

Dennis Zabawa
 

I have one and am working on an Arduino sketch to interface it to an LCD graphic display.  I hope to package it in a 3D printed case as a battery powered,  handheld device.

Re: Harmonic performance - SSB vs CW

William R Maxwell
 

No Bill, he hasn't been banned by me and he is not in the trash bin. Odd thing is that direct emails between us are getting through, just not anything from Glenn via the groups.io. You blokes best keep on responding to his posts, otherwise I won't know that he has made them :(

Bill, VK7MX


On 7/08/2018 11:59 PM, Bill Cromwell wrote:
Hi,

Check to see if you (accidentally) banned him from your inbox. Our screens are busy places and it is easy enough to accidentally bump the wrong thing. Been there - done that.

Check your 'spam bin' and 'trash bin' or whatever your mail system calls it. You can correct it there if you find Glenn's posts.

73,

Bill  KU8H

On 08/07/2018 04:03 AM, William R Maxwell wrote:
Can anybody explain why I am not receiving Glenn's posts on this subject
but I am receiving the responses he receives, such as this from Colin.
Yet, if  I go to the group page to view Colin's reply, I can step back
to find Glenn's post. Why should they not be appearing as emails, as
they had previously, since we moved to groups.io

Bill, VK7MX




Re: New Warning on uBITx.net

Bill Bates
 

My thoughts exactly ! Less is more, so much more fun to get contacts o a few watts than shop bought kit & a hundred watts 😊, Bill G6ATO


From: n3ode@...
Sent: ‎08/‎08/‎2018 01:09 PM
To: BITX20@groups.io
Subject: Re: [BITX20] New Warning on uBITx.net

As a tech class amateur I cannot justify a full featured radio with the limited bandwidth available to me.  I want to upgrade to general class which will open all bands and a dramatic amount of bandwidth. 

This unit has allowed me to dip my toe into HF and learn a bit more of the theory which I lacked working UHF and VHF FM for 25 years.  I am hooked on QRP operation and will learn much more using this radio in low power for discovery of good antenna systems. 

Simple is beautiful and a unit with one button, one knob, and a tuner is quite pretty to me. 

John N3ODE
 

Re: New Warning on uBITx.net

Gordon Gibby <ggibby@...>
 

Hi,  good point.   My basic concern for the GROUP is that grandstanding, cutting, demeaning, or even nasty statements about other people have no place.   You'll drive people like me (and likely many others) away.   


The goal is to help people, and to share knowledge.   People are going to make mistakes --- and you may have to gently explain their mistake to them, and even more than once!   But even so, being kind and gracious when explaining their boo-boo  is the mark of a true giant.  (Ah, there have been MANY times that I've fallen short!)


It is a two-way street on the harmonics problems....I would not have expected that the little kit had these problems....but I was keenly aware that it was built inexpensively -- but by a genius I felt --- whose web site plainly states:  (on one of its pages) 


"The HF Signals kits are supplied as-is without any promise that they will work to any particular specification. That said, thousands of BITX transceivers supplied by HF Signals work across the world. There is an active and very informative forum for learning and getting help that is entirely driven by the builder community. Join us on https://groups.io/g/bitx20   "


So for people like me who have several of these, now I'm aware of the issues and it isn't that hard for me to cut a trace and add a cable and plug in the filter output that I wish, or add relays or whatever --- that's the spirit of KIT HOOD!!     For people who don't have those skills (yet)  this is a chance to grow --- my first radio (HW-16) took MONTHS to get working right....horrible key clicks, etc...


For the MANUFACTURER --- well I bet they realize quite well that their sales could plummet and they really need to take advantage of the incredible detective work that has been done here, with the problem discovered, and then analyzed and figured out --- and multiple possible solutions also in construction.    I suspect a lot of work on their part,  is ongoing right now to assuage this problem.   For the people whom I'm mentoring RIGHT NOW --- we'll do workarounds and figure out improvements and they will learn evenmore, tho I'm sure they will be a tiny bit downcast that their new little jewel has a problem we need to work on....but that is the nature of learning.   


Cheers,


Gordon Gibby KX4Z






From: BITX20@groups.io <BITX20@groups.io> on behalf of Scott McDonald via Groups.Io <ka9p@...>
Sent: Wednesday, August 8, 2018 7:32 AM
To: BITX20@groups.io
Subject: Re: [BITX20] New Warning on uBITx.net
 
A basic thought could be that a professional radio man would read the statements on Farhan’s website that this is a kit, offered AS IS, not warrantied to any specification, and would not take it on board, eh?

The radio and the open collaboration of the people on this reflector to teach others and make it better has been to me one of the most amazing and positive amateur radio experiences I’ve had.  

Cheers, Scott KA9P

Make something good happen!

On Aug 8, 2018, at 4:05 AM, Timothy Fidler <engstr@...> wrote:

Boll_ks. there is no fix . there is a maybe fix in the  works. Some people who use or try to  this kit are professional radio men on ships and the like and they don't want their professional blotter compromised by a prosecution from the SMA / FCC and the like .. or even an investigation.  Your statement lacks any level of basic thought IMHO.

Timothy E. Fidler : Engineer BE Mech(1) Auckland , NDT specialist AINDT UT /RT3 , MT2 
Telephone Whangarei   022  691 8405
e: Engstr@...



----- Original Message -----

To:
<BITX20@groups.io>
Cc:

Sent:
Wed, 8 Aug 2018 09:53:37 +0100
Subject:
Re: [BITX20] New Warning on uBITx.net


Bit OTT considering a fix was sorted within a couple of days.

 

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of Mike Woods
Sent: 08 August 2018 09:37
To: BITX20@groups.io
Subject: [BITX20] New Warning on uBITx.net

 

I felt that I had no choice but to post a warning for potential uBITx purchasers and existing constructors that there were serious issues with emissions purity.  The following warning now appears on the first (permanently fixed) post:

WARNING:  Issues have been identified recently with the emissions purity of the µBITx.  It is recommended that you study recent posts on this website and avoid operations that could breach emissions requirements.

A reminder that uBITx.net has no association with HF Signals.  It is purely an information site.

I am sorry that the situation has resulted in requiring such a warning.   I have also updated the strengths and weaknesses page with a similar message.

73 Mike ZL1AXG ubitx.net

--
Mike Woods
mhwoods@...