Date   
Re: Simple vfo sketch

Laurence Oberman
 

I have a signal Generator using the same DDS chip and Arduino setup I
built from ideas from Jacks book.
I use it all the time.
This is my sketch

On Tue, Jan 15, 2019 at 12:14 AM MVS Sarma <mvssarma@...> wrote:

Hi,
Farhan already published his antenna analyser (ANTUINO), where there is a free running osc on one of the clocks of his ANTUINO.
All the best
Sarma vu3zmv

On Tue, 15 Jan 2019, 5:40 am Don Richards <ve3ids.don@... wrote:

I have built this version of the raduino,

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

It works quite well with my HW 101 in receive. It needs a little more amplitude to drive the transmitter properly, that mod is in progress.

My question to the group is, has anyone written a sketch for the raduino that is a simple RF generator that could be used as a signal generator or for a simple vfo for an old crystal transmitter, ie, one that simply generates the actual frequency that it displays on the LCD and still uses the tuning pot rather than an encoder?

I don't know nearly enough to create this, hoping that some of the talent that frequents this group has done this and can share.

Thanks and 73
Don ve3ids

Need a replacement Raduino.

Billy Shepherd <dis60cd@...>
 

I was messing around with the voltage reg and sent burned the board. It's the latest version. Anyone know how to get a replacement?

Re: Simple vfo sketch

Curt
 

AA8V and others have done nice work in buffering a DDS for tube (valve) radio use.  He provided a design in QST - and I see info at his website (I will warn you his vintage projects are dreadfully neat !). 

https://faculty.frostburg.edu/phys/latta/ee/ee.html

a square wave is certainly bad when being used as a source to measure filters and the like.  it would seem to add to the burden of filtering it in driving a transmitter - unless the tuned circuits in the path handle it (they might?). 

73 Curt

Re: JackAl Voltage Chart

Jerry Gaffke
 

And a third: 
  Design and build your own gear.
  Then it's certain to be zero-defect.

To be honest, I was wondering for a moment if I was 
taking a snarkily comic remark too seriously.

Jerry


On Tue, Jan 15, 2019 at 10:35 AM, Jerry Gaffke wrote:
Another possible strategy:  Sit on your hands till the Alpha 0.002 release of JackAl rolls out.

Re: JackAl Voltage Chart

Gordon Gibby <ggibby@...>
 

Mr. Wright. please go away


On Jan 15, 2019, at 13:35, bill wright via Groups.Io <chief6226@...> wrote:

Don't know why a commons sense comment turns snarky.  If you are putting out crap
even if it is an experimenter source code, save the bugs until they are fixed.
As stated before, someone will NOT get the word.
Bill kd5yyk



From: Jack Purdum via Groups.Io <jjpurdum@...>
To: BITX20@groups.io
Sent: Tuesday, January 15, 2019 12:27 PM
Subject: Re: [BITX20] JackAl Voltage Chart

Jerry:

Exactly. Also, JackAl is an Open Source, experimenters platform, not just a product. It's meant to be dinked around with and we hope that's what buyers intend to do. There are still about a dozen free pins, 780K of flash, and 225K of SRAM left unused in JackAl, so there are plenty of idle resources. Hopefully, people with share their discoveries.

Jack, W8TEE

On Tuesday, January 15, 2019, 1:21:05 PM EST, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:


If you want something that claims to have zero defects, I suggest paying more than $50 for it.
Check out the offerings from Lockheed Martin or Loral.

Jerry


On Tue, Jan 15, 2019 at 10:16 AM, bill wright wrote:
what ever happened to zero defects?.. Known bugs released will
continue to screw things up because someone will NOT get the word.
Bill kd5yyk
 


Re: JackAl Voltage Chart

K5ESS
 

Zero Defects.   Ah yes.  Harkens back to the 60’s when McDonnell Douglas had a “Zero Defects” program.  They had big all hands meetings where execs exhorted all to have zero defects in their work and passed out Zero Defects coins to everyone.  It was a short lived program when it was realized that this was not the way to achieve high quality.  Ultimately they discovered Juran and Deming and launched into another quality improvement program.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of bill wright via Groups.Io
Sent: Tuesday, January 15, 2019 12:17 PM
To: BITX20@groups.io
Subject: Re: [BITX20] JackAl Voltage Chart

 

what ever happened to zero defects?.. Known bugs released will

continue to screw things up because someone will NOT get the word.

Bill kd5yyk

 


From: Jack Purdum via Groups.Io <jjpurdum@...>
To: BITX20@groups.io
Sent: Tuesday, January 15, 2019 7:46 AM
Subject: Re: [BITX20] JackAl Voltage Chart

 

Mornin' Christopher:

 

I hate releasing software with a known bug in it, even when it is one that doesn't really impact the functionality of the product. The bug is in the EEPROM that saves the setup information. An easy fix is to simply hard-code the values, but that requires programming which scares a lot of people. I know it's going to be a flat-forehead mistake on my part, so I'm fairly sure I'll get it fixed soon or have a viable work-around within a day or two.

 

 

Jack, W8TEE

 

 

On Tuesday, January 15, 2019, 1:06:17 AM EST, Christopher Miller <djmalak2k6@...> wrote:

 

 

Why not remove them, release the source and then release a new version /after/ you fix the bugs?

 

If I recall correctly this person also attacked people from posting off topic on their thread promoting their product. Its a little disappointing in my humble opinion.

 

KF4FTR

 

Re: JackAl Voltage Chart

Jack, W8TEE
 

Where do I say that I'm going to release it before I fix the bugs?

Jcak, W8TEE

On Tuesday, January 15, 2019, 1:35:20 PM EST, bill wright via Groups.Io <chief6226@...> wrote:


Don't know why a commons sense comment turns snarky.  If you are putting out crap
even if it is an experimenter source code, save the bugs until they are fixed.
As stated before, someone will NOT get the word.
Bill kd5yyk



From: Jack Purdum via Groups.Io <jjpurdum@...>
To: BITX20@groups.io
Sent: Tuesday, January 15, 2019 12:27 PM
Subject: Re: [BITX20] JackAl Voltage Chart

Jerry:

Exactly. Also, JackAl is an Open Source, experimenters platform, not just a product. It's meant to be dinked around with and we hope that's what buyers intend to do. There are still about a dozen free pins, 780K of flash, and 225K of SRAM left unused in JackAl, so there are plenty of idle resources. Hopefully, people with share their discoveries.

Jack, W8TEE

On Tuesday, January 15, 2019, 1:21:05 PM EST, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:


If you want something that claims to have zero defects, I suggest paying more than $50 for it.
Check out the offerings from Lockheed Martin or Loral.

Jerry


On Tue, Jan 15, 2019 at 10:16 AM, bill wright wrote:
what ever happened to zero defects?.. Known bugs released will
continue to screw things up because someone will NOT get the word.
Bill kd5yyk
 


Re: JackAl Voltage Chart

Jerry Gaffke
 

Another possible strategy:  Sit on your hands till the Alpha 0.002 release of JackAl rolls out.
Jerry


On Tue, Jan 15, 2019 at 10:27 AM, Jack Purdum wrote:
Exactly.

Re: JackAl Voltage Chart

bill wright
 

Don't know why a commons sense comment turns snarky.  If you are putting out crap
even if it is an experimenter source code, save the bugs until they are fixed.
As stated before, someone will NOT get the word.
Bill kd5yyk



From: Jack Purdum via Groups.Io <jjpurdum@...>
To: BITX20@groups.io
Sent: Tuesday, January 15, 2019 12:27 PM
Subject: Re: [BITX20] JackAl Voltage Chart

Jerry:

Exactly. Also, JackAl is an Open Source, experimenters platform, not just a product. It's meant to be dinked around with and we hope that's what buyers intend to do. There are still about a dozen free pins, 780K of flash, and 225K of SRAM left unused in JackAl, so there are plenty of idle resources. Hopefully, people with share their discoveries.

Jack, W8TEE

On Tuesday, January 15, 2019, 1:21:05 PM EST, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:


If you want something that claims to have zero defects, I suggest paying more than $50 for it.
Check out the offerings from Lockheed Martin or Loral.

Jerry


On Tue, Jan 15, 2019 at 10:16 AM, bill wright wrote:
what ever happened to zero defects?.. Known bugs released will
continue to screw things up because someone will NOT get the word.
Bill kd5yyk
 


Re: JackAl Voltage Chart

Jack, W8TEE
 

Jerry:

Exactly. Also, JackAl is an Open Source, experimenters platform, not just a product. It's meant to be dinked around with and we hope that's what buyers intend to do. There are still about a dozen free pins, 780K of flash, and 225K of SRAM left unused in JackAl, so there are plenty of idle resources. Hopefully, people with share their discoveries.

Jack, W8TEE

On Tuesday, January 15, 2019, 1:21:05 PM EST, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:


If you want something that claims to have zero defects, I suggest paying more than $50 for it.
Check out the offerings from Lockheed Martin or Loral.

Jerry


On Tue, Jan 15, 2019 at 10:16 AM, bill wright wrote:
what ever happened to zero defects?.. Known bugs released will
continue to screw things up because someone will NOT get the word.
Bill kd5yyk
 

Re: JackAl Voltage Chart

Jack, W8TEE
 

That's not what he's saying. What he's suggesting is remove the features that aren't working correctly and release it that way, fix the bugs, and then put the fixed code back in. Well, as it turns out, Al found what the issue was and I'm working on the fixes. Hopefully they won't take too long and this one fix will fix both bugs.

Jack, W8TEE

On Tuesday, January 15, 2019, 1:16:57 PM EST, bill wright via Groups.Io <chief6226@...> wrote:


what ever happened to zero defects?.. Known bugs released will
continue to screw things up because someone will NOT get the word.
Bill kd5yyk



From: Jack Purdum via Groups.Io <jjpurdum@...>
To: BITX20@groups.io
Sent: Tuesday, January 15, 2019 7:46 AM
Subject: Re: [BITX20] JackAl Voltage Chart

Mornin' Christopher:

I hate releasing software with a known bug in it, even when it is one that doesn't really impact the functionality of the product. The bug is in the EEPROM that saves the setup information. An easy fix is to simply hard-code the values, but that requires programming which scares a lot of people. I know it's going to be a flat-forehead mistake on my part, so I'm fairly sure I'll get it fixed soon or have a viable work-around within a day or two.


Jack, W8TEE


On Tuesday, January 15, 2019, 1:06:17 AM EST, Christopher Miller <djmalak2k6@...> wrote:


Why not remove them, release the source and then release a new version /after/ you fix the bugs?

If I recall correctly this person also attacked people from posting off topic on their thread promoting their product. Its a little disappointing in my humble opinion.

KF4FTR


Re: JackAl Voltage Chart

Jerry Gaffke
 

If you want something that claims to have zero defects, I suggest paying more than $50 for it.
Check out the offerings from Lockheed Martin or Loral.

Jerry


On Tue, Jan 15, 2019 at 10:16 AM, bill wright wrote:
what ever happened to zero defects?.. Known bugs released will
continue to screw things up because someone will NOT get the word.
Bill kd5yyk
 

Re: JackAl Voltage Chart

bill wright
 

what ever happened to zero defects?.. Known bugs released will
continue to screw things up because someone will NOT get the word.
Bill kd5yyk



From: Jack Purdum via Groups.Io <jjpurdum@...>
To: BITX20@groups.io
Sent: Tuesday, January 15, 2019 7:46 AM
Subject: Re: [BITX20] JackAl Voltage Chart

Mornin' Christopher:

I hate releasing software with a known bug in it, even when it is one that doesn't really impact the functionality of the product. The bug is in the EEPROM that saves the setup information. An easy fix is to simply hard-code the values, but that requires programming which scares a lot of people. I know it's going to be a flat-forehead mistake on my part, so I'm fairly sure I'll get it fixed soon or have a viable work-around within a day or two.


Jack, W8TEE


On Tuesday, January 15, 2019, 1:06:17 AM EST, Christopher Miller <djmalak2k6@...> wrote:


Why not remove them, release the source and then release a new version /after/ you fix the bugs?

If I recall correctly this person also attacked people from posting off topic on their thread promoting their product. Its a little disappointing in my humble opinion.

KF4FTR


Re: low output only on 40m

jim
 

Couple 'o questions ...SSB or CW  and How is power being measured?  broadband watt meter ?

If so ..All emissions from the xmitter are being summed together (dc to daylight) ie fundamental + harmonics + spurs + ?

Jim

On Tuesday, January 15, 2019, 9:30:55 AM PST, Bill Cromwell <wrcromwell@...> wrote:


Hi Evan,

Here is a contrary report for you. The forty meter output on my uBitx is
close to the same as 80 amd 30 meters and close to 10 watts. I have the
red and brown power supply wires connected together and run all of my
radios on 12 volt batteries (~13 volts at no-load, full charge). Due to
tolerance stacks among all the various parts used each of these radios
will be at least a little different from all others. If any parts are
out of tolerance that is going to be more so.

Mine is a V3 with the non "WX" audio IC socketed. I am running the CEC
software but that has nothing to do with RF power out. Board version might.

73,

Bill  KU8H

On 1/15/19 12:10 PM, Evan Hand wrote:
> This 40m output is very low compared to others, however ALL reports that
> I have seen always seem to have the 40m output much lower than 20m. 
> Does anyone know the reason for the drop on 40m compared to 20m?  Is it
> related to spurs being measured as part of the power out?
>
> Trying to learn and understand.
>
> Evan
> AC9TU
>

--
bark less - wag more



Re: low output only on 40m

Bill Cromwell
 

Hi Evan,

Here is a contrary report for you. The forty meter output on my uBitx is close to the same as 80 amd 30 meters and close to 10 watts. I have the red and brown power supply wires connected together and run all of my radios on 12 volt batteries (~13 volts at no-load, full charge). Due to tolerance stacks among all the various parts used each of these radios will be at least a little different from all others. If any parts are out of tolerance that is going to be more so.

Mine is a V3 with the non "WX" audio IC socketed. I am running the CEC software but that has nothing to do with RF power out. Board version might.

73,

Bill KU8H

On 1/15/19 12:10 PM, Evan Hand wrote:
This 40m output is very low compared to others, however ALL reports that I have seen always seem to have the 40m output much lower than 20m. Does anyone know the reason for the drop on 40m compared to 20m?  Is it related to spurs being measured as part of the power out?
Trying to learn and understand.
Evan
AC9TU
--
bark less - wag more

Re: low output only on 40m

Curt
 

Evan

learn - yeah me too! 

if you convert the spurs to absolute power, relative to the carrier power - you can add them all up and see they are quite small.  power in dBm is 10 log (power in mw).  and convert something like a spur that is 20 dB down to a ratio of 0.01  (factor of 100).  so a 1 watt signal with 2 spurs 20 dB down, the power in the spurs is something like 0.02 watts ! 

but keep asking yourself and others questions - and not latching onto your first thought on what may be causing an issue [don't research the web to see how I have resembled this in the past on several projects!]

Allison

thanks for what to look for.  I never did build that RF probe or PHSNA yet (I will get the built someday and may not need them then ....) -- but I can do a simple sweep with my power meter and dummy load to see what is going on (I would be doing it except for being at work).  it seems that issue is after (on transmit) the two sets of 45 MHz filters it now has.  [yeah I cracked 2 SMT caps making this mod - but they were tombstone installed - so I realize they are delicate - I may have used leaded ones if my friend who kitted the filter told me the cap value ... our spur fix is this xtal filter (with 2 matching transformers) + Gordon's board of relays - we will have data on 23 units some day]

other than the response of the LPF, the only other thing I see that offers potentially narrow bandwidth are those chokes feeding the PA transistors - and that seems highly unlikely unless a hole bunch of turns were added to it. 

out of the box my ubitx was weaker on 40m - and I just brought it down further.  its nice on every other band.  [yes I blamed it on the xtal filter before I checked all the other bands.  ditto for snow and ice on my elevated vertical coil -- always check with a 50 ohm dummy load, or a simpler antenna not impact by ice's dielectric loading!] 

73 Curt

Re: Tracing receive signal for low signal

jim
 

Nothing specific ..Just be sure the voltage does not change when going from receive to transmit ..decreasing voltage due to current draw will increase spur/harmonic/cruft generation ..

Spur/harmonic measurement ...Back in the old days, hams used a "Grid Dip Meter" with the switch in the "diode" position as an "absorption wavemeter"

Jim

On Tuesday, January 15, 2019, 4:57:20 AM PST, Dave Space <davesspacebar@...> wrote:


Only running one supply and it's basically just an old wall wart adapter that can run at 12v.  Supplies help a lot?  Have any suggestions on supplies?

Re: low output only on 40m

Bill Cromwell
 

Hi,

Did you run this sweep through the filters with a spectrum analyzer or a wobbulator> Or did you just use the transmitter itself? Just because the filter labeled 40 and 30 meters works on 30 meters does NOT mean the attenuation curve is right for 40 meters. I think Allison mentions counting the turns in her latest post. She has posted about this exact thing before.

73,

Bill KU8H

On 1/15/19 11:41 AM, Curt via Groups.Io wrote:
Ted
thanks for communication - I know slightly more about symptom now --
first, it likely can't be what I thought - LPF - as this LPF also is used on 30 meters!  my 30m power is okay.
I just ran a sweep across all the bands into a dummy load -- every band except 40m is producing a lively output (my power meter is reading 10 watts on 160m * down to 4 watts on 10m -- its got a QRP scale, but it was calibrated a couple decades ago).  So I am convinced I have a substantial dip (reading less than 2 watts now on 40m).
since I am using a dummy load - I will get some data on the width of this notch.  it is almost like a choke isn't working around 7 MHz.
brief history: my ubitx has always been weaker on 40m.  I will confess it has one modification - an extra 45 MHz xtal filter placed on the other side of its IF amplifier.  this network made the 40m outage worse.  I saw a tip from Farhan to reduce R26 from 470 to 220 ohms to compensate for this filter loss - I made this mod.  but I can't blame it directly -- I got nice output on all other bands.
we have 22 other ubitx from the same or recent lot in our club -- maybe mine is acting different that the population -- we are still gathering data from builders.
the funny thing - these kind of problems always increase education, getting 'me' to examine places I would not be compelled to examine. let's see if I can learn anything, and get this thing fixed.
* yes I realize I have no low pass filtering of the second harmonic when operating at 1.8 MHz ... but my 160m vertical presents a dreadful match at 80m.  a nearby RBN receiver conveys I got at least 40 dB rejection by its non-report on 80m!  know your antenna before doing this - but several of us in NA operating a stock ubitx on top band.
73 Curt
--
bark less - wag more

Re: low output only on 40m

Evan Hand
 

This 40m output is very low compared to others, however ALL reports that I have seen always seem to have the 40m output much lower than 20m.  Does anyone know the reason for the drop on 40m compared to 20m?  Is it related to spurs being measured as part of the power out?

Trying to learn and understand.

Evan
AC9TU

Re: low output only on 40m

ajparent1/kb1gmx
 

Its not the first time I've seen the wrong toroids installed and 40 was messed up.

Make sure the toroids have something like 15 turns of wire on them.
Last one I'd seen had the same number of turns as the 10m toroids (about 9 turns).

Also of a cap in the circuit gets cracked it will have a similar effect.

Allison