Date   
Re: uBitx not receiving well on CWU or CWL

John (vk2eta)
 

Hello Mike,

In CEC firmware the CW BFO can be set differently to the SSB BFO.

See the menu item "Set CW RX BFO" in the rig's settings.

It may be way off.

Cheers, John (VK2ETA)

Re: Mag Loop for HOA's??

jsternmd
 

Perfectly understandable…. Just write the book fast J

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jack Purdum via Groups.Io
Sent: Tuesday, June 25, 2019 4:53 PM
To: BITX20 <bitx20@groups.io>
Subject: [BITX20] Mag Loop for HOA's??

 

All:

 

There are several publishers who have expressed interest in publishing the new Projects book. While I was not able to contact each of them, I was told that releasing details now about projects that are to be published in the book would lessen their interest in publishing it. So we find ourselves in a rock-hardplace situation: Releasing the info now lessens the chance to get the book published but also delays implementation for those who have an interest in it.

 

I know this sounds harsh, but the book publishing is the only way we're going to recoup any of the money we've spent on all of the projects, which has not been a trivial amount. In other words, releasing details on the Double-Double now pretty much puts the kibosh on all of the other projects in the book, too. Therefore, we will put the D-D on the back burner for now until we finish the book.

 

I really am sorry about this, but please view this as a delay, not a refusal...

 

 

Jack, W8TEE

Re: Ubitx occasionally hanging in transmit while receive led is on. Have to hit cw key a few times to get it unstuck. Ideas? #ubitx

Mike Short
 

I take pliers and break the component apart and remove pins one at a time. 

Re: Mag Loop for HOA's??

Art N4EZZ
 

Jack,

I certainly understand.

As much as I sympathize with the write fast comment, please, take the
time to do it right.

I have plenty of other projects in some state of planning or
construction so I can keep causing trouble until the book is finished.


Art N4EZZ <n4ezz@...>
GnuPG key ID 0x6712DD0E
=============================
"Democracy is two wolves and a lamb voting on what to have for lunch.
Liberty is a well-armed lamb contesting the vote!"
BENJAMIN FRANKLIN

On 6/25/19 2:52 PM, Jack Purdum via Groups.Io wrote:
All:
There are several publishers who have expressed interest in publishing the new Projects book. While I was not able to contact each of them, I was told that releasing details now about projects that are to be published in the book would lessen their interest in publishing it. So we find ourselves in a rock-hardplace situation: Releasing the info now lessens the chance to get the book published but also delays implementation for those who have an interest in it.

I know this sounds harsh, but the book publishing is the only way we're going to recoup any of the money we've spent on all of the projects, which has not been a trivial amount. In other words, releasing details on the Double-Double now pretty much puts the kibosh on all of the other projects in the book, too. Therefore, we will put the D-D on the back burner for now until we finish the book.
I really am sorry about this, but please view this as a delay, not a refusal...

Jack, W8TEE



Re: Mag Loop for HOA's??

JP JO
 

Jack et al,
I agree. Don't write the book fast because I cannot read fast. Write it slow so even this Air Force Vet can understand.

JP
KA3BWP

Sent by me

On Jun 25, 2019, at 5:16 PM, Art N4EZZ <n4ezz@...> wrote:

Jack,

I certainly understand.

As much as I sympathize with the write fast comment, please, take the
time to do it right.

I have plenty of other projects in some state of planning or
construction so I can keep causing trouble until the book is finished.


Art N4EZZ <n4ezz@...>
GnuPG key ID 0x6712DD0E
=============================
"Democracy is two wolves and a lamb voting on what to have for lunch.
Liberty is a well-armed lamb contesting the vote!"
BENJAMIN FRANKLIN

On 6/25/19 2:52 PM, Jack Purdum via Groups.Io wrote:
All:
There are several publishers who have expressed interest in publishing the new Projects book. While I was not able to contact each of them, I was told that releasing details now about projects that are to be published in the book would lessen their interest in publishing it. So we find ourselves in a rock-hardplace situation: Releasing the info now lessens the chance to get the book published but also delays implementation for those who have an interest in it.

I know this sounds harsh, but the book publishing is the only way we're going to recoup any of the money we've spent on all of the projects, which has not been a trivial amount. In other words, releasing details on the Double-Double now pretty much puts the kibosh on all of the other projects in the book, too. Therefore, we will put the D-D on the back burner for now until we finish the book.
I really am sorry about this, but please view this as a delay, not a refusal...

Jack, W8TEE




Has anybody gotten KD8CEC's SWR meter to work and can share how?

Mark Hatch
 

Hi,

SWR was one of the final aspects of the Nextion 5" work that I wanted to check (also need to check WSPR). Built the SWR bridge from kitsandparts (great tutorial on winding Toroids there), balanced it has instructed and then followed Ian's instructions for connecting it. Well the good news is that there is no apparent bugs I introduced into the Nextion software regarding display of SWR.  But the bad news is that the meter is pegged as if I am seeing SWR>9 into a dummy load.

Certainly could have done something wrong in assembling the SWR bridge, however, the fact that I got it balanced makes me think maybe not... But before I grab my AC RF meter and do the calculations by hand, thought I would ask if someone has been down this path before....

73
Mark
AJ6CU 

Re: Mag Loop for HOA's??

William R Maxwell
 

Could you check that item number please Jack? Doesn't find a match on eBay.

73 Bill VK7MX

Re: uBitx not receiving well on CWU or CWL

Balasubramanyan Cp
 

OM John, Thanks. THANKS to John again.
73s

On Tue, Jun 25, 2019 at 11:58 PM John (vk2eta) <vk2eta@...> wrote:
Hello Mike,

In CEC firmware the CW BFO can be set differently to the SSB BFO.

See the menu item "Set CW RX BFO" in the rig's settings.

It may be way off.

Cheers, John (VK2ETA)

Re: Mag Loop for HOA's??

MadRadioModder
 

That capacitor design is a nice engineering solution to a complex problem.  The cost of vacuum variables and their relative fragile package put them out of reach of the average ham for something like this loop antenna.  Nicely done!

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of David Posthuma
Sent: Tuesday, June 25, 2019 1:25 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Mag Loop for HOA's??

 

In an article I wrote for Elecraft in 2001 about miniature magnetic loop antennas, I portrayed a working model that covered 15m-60m but added 80m with the use of an optional 4-inch capacitor made from RG8 coax that would bridge across the main piston-capacitor. BTW, piston capacitors work well and can provide quite broad coverage. See below…

 

 

David A Posthuma, WD8PUO

1 (616) 283-7703

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of Jack Purdum via Groups.Io
Sent: Tuesday, June 25, 2019 2:00 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Mag Loop for HOA's??

 

 Art:

 

Al had a vacuum variable cap (VVC) with a different range and he was able to get it to work on 80M-20M, but the problem is setting the limit switches for a VVC. The pillow blocks and threads cost about $30 then add in the micro switches and the VVC. Al had an air cap that would work for 40-30-20M, so that's what we tried as it was less expensive. Also, the likelihood of someone having a usable air VC lying around unemployed is more likely that a VVC. I will be using a VVC on mine since I have a very small VVC I just picked up in Dayton that will be easy to mount yet have the range for 80-20M. The problem is on the low end of the cap range. His air cap won't go low enough for 80M without some kind of kludge with another cap.

 

BTW, stupid me: There's no need to move the stepper and cap inside the loop, which you probably shouldn't do anyway. The tubing leads can be bent slightly to shed water away from the leads' entry points into the box.

 

As I mentioned before, Al and I are making this a chapter in the new book and we are also writing an article on it, so we need to save some info for those. Let me talk to Al and see if we can give you the general dimensions of the loops and their spacing which would be enough to get going.

 

Jack, W8TEE

 

On Tuesday, June 25, 2019, 1:22:03 PM EDT, Art N4EZZ <n4ezz@...> wrote:

 

 

Jack,

When might we get some more details, dimensions, schematics, BOM, code?
If there is more information available I must have missed it. I would
like to start stocking up on parts.

In reference to Field Day you mentioned 40 and 20 meters, will this
design extend to 80?

Thanks, I do appreciate all that you and Al are doing to encourage
interest in building things for Ham radio.

If Al doesn't like the "luggable double double" why don't you call it
the "JackAl Mag Double" or even shorter "AJ Mag Double".

Art N4EZZ <n4ezz@...>
GnuPG key ID 0x6712DD0E
=============================
In any given circuit, the most expensive part will always sacrifice
itself to protect the fuse.

On 6/25/19 9:20 AM, Jack Purdum via Groups.Io wrote:
>  I don't know much about their loop, but as I recall, everything is sealed inside a plastic housing. That would suggest a "No". Given that their loop costs around $400, it would be significantly cheaper to build the Double-Double. The main expenses for the loop are the copper tubing (figure 4 10' sections plus some fittings) and the AD9850 module (DDS). The PCB will cost under $10 and most parts are inexpensive except for the DDS. It's something to think about.
> Jack, W8TEE
>
>    On Tuesday, June 25, 2019, 11:01:12 AM EDT, ke6bgn@... <ke6bgn@...> wrote: 

>  Jack,
> Do you think this controller would be able to be used with the MFJ loops fairly easily? If so, this could be an excellent alternative to the manually driven setup that the factory setup provides.
>


Virus-free. www.avg.com

--

…_. _._

Re: Mag Loop for HOA's??

Jack, W8TEE
 

I think it does. Just type in 123554326786 into the search bar. It's not an item number, it's the eBay posting number.

Jack, W8TEE

On Tuesday, June 25, 2019, 7:09:52 PM EDT, William R Maxwell <wrmaxwell@...> wrote:


Could you check that item number please Jack? Doesn't find a match on eBay.

73 Bill VK7MX

Re: Mag Loop for HOA's??

Jack, W8TEE
 

Thanks, Art...it's appreciated!

Jack, W8TEE

On Tuesday, June 25, 2019, 5:16:24 PM EDT, Art N4EZZ <n4ezz@...> wrote:


Jack,

I certainly understand.

As much as I sympathize with the write fast comment, please, take the
time to do it right.

I have plenty of other projects in some state of planning or
construction so I can keep causing trouble until the book is finished.


Art N4EZZ <n4ezz@...>
GnuPG key ID 0x6712DD0E
=============================
"Democracy is two wolves and a lamb voting on what to have for lunch.
Liberty is a well-armed lamb contesting the vote!"
      BENJAMIN FRANKLIN

On 6/25/19 2:52 PM, Jack Purdum via Groups.Io wrote:
> All:
> There are several publishers who have expressed interest in publishing the new Projects book. While I was not able to contact each of them, I was told that releasing details now about projects that are to be published in the book would lessen their interest in publishing it. So we find ourselves in a rock-hardplace situation: Releasing the info now lessens the chance to get the book published but also delays implementation for those who have an interest in it.
>
> I know this sounds harsh, but the book publishing is the only way we're going to recoup any of the money we've spent on all of the projects, which has not been a trivial amount. In other words, releasing details on the Double-Double now pretty much puts the kibosh on all of the other projects in the book, too. Therefore, we will put the D-D on the back burner for now until we finish the book.
> I really am sorry about this, but please view this as a delay, not a refusal...
>
> Jack, W8TEE

>
>
>
>



Re: Mag Loop for HOA's??

Jack, W8TEE
 

Actually, we have 12 of the 17 chapters written in at least rough draft state. (Obviously, the easy ones are done. Some tougher ones remain, but Al's done some pretty cool stuff!)

Jack, W8TEE

On Tuesday, June 25, 2019, 5:04:20 PM EDT, jsternmd <jsternmd@...> wrote:


Perfectly understandable…. Just write the book fast J

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jack Purdum via Groups.Io
Sent: Tuesday, June 25, 2019 4:53 PM
To: BITX20 <bitx20@groups.io>
Subject: [BITX20] Mag Loop for HOA's??

 

All:

 

There are several publishers who have expressed interest in publishing the new Projects book. While I was not able to contact each of them, I was told that releasing details now about projects that are to be published in the book would lessen their interest in publishing it. So we find ourselves in a rock-hardplace situation: Releasing the info now lessens the chance to get the book published but also delays implementation for those who have an interest in it.

 

I know this sounds harsh, but the book publishing is the only way we're going to recoup any of the money we've spent on all of the projects, which has not been a trivial amount. In other words, releasing details on the Double-Double now pretty much puts the kibosh on all of the other projects in the book, too. Therefore, we will put the D-D on the back burner for now until we finish the book.

 

I really am sorry about this, but please view this as a delay, not a refusal...

 

 

Jack, W8TEE

Re: uBitx not receiving well on CWU or CWL

Mike Kilpatrick
 

Thanks John VK2ETA and everyone else. 
Of course! So obvious really. 
Just a case of an old timer not being able to see the wood because of the trees! 
All fine now the CW Rx BFO has been tweaked. 
This radio is a great learning experience for me and a real credit to Ashar, Ian and all you very helpful people on this forum. 
Ham radio being what it should be, great stuff!


On 26 Jun 2019, at 09:14, Balasubramanyan Cp <bsnvu2yc73s@...> wrote:

OM John, Thanks. THANKS to John again.
73s

On Tue, Jun 25, 2019 at 11:58 PM John (vk2eta) <vk2eta@...> wrote:
Hello Mike,

In CEC firmware the CW BFO can be set differently to the SSB BFO.

See the menu item "Set CW RX BFO" in the rig's settings.

It may be way off.

Cheers, John (VK2ETA)

uBITX V5 IS 2 kc low and birdies all around 10 MHz

jsternmd
 

My UBitx v5 (firmware 5.1) recently received.  I checked PA bias and BFO are fine.  I found that stations are reading 2.000 kc lower.  I tried the Master Clock alignment but there are loud birdies at 9999.000 and 9998.000 with antenna coax pulled off or if connected to dummy load.  I have a Rigol siggen clocked by external GPSDO and set it to various frequencies away from the birdies and confirmed the UBitx reads a 10.000.000 MHZ at 9.998.000.   I went to Menu:Setup Calibrate but it seems to be tied to only a 10MHz signal.  Also when I press the encoder button, it switches to TX and speaker is silent.... how do you zero-beat in TX??? Do I need another receiver loosely coupled to the UBitx?   I have a v3 board which I will swap in to see how that behaves but any advice on the v5 board greastly appreciated.

Jerry NY2KW
 

Re: uBITX V5 IS 2 kc low and birdies all around 10 MHz

Evan Hand
 

Check on this thread, as the calibration procedure changed from the v4 to v5 software.

https://groups.io/g/BITX20/topic/30236125

Note that the new process with HFSignals' firmware does go into transmit mode, and that you need a receiver and a dummy load (or else antenna) connected to the uBitx.  Then zero beat the signal against the other receiver tuned to 10 MHz.

The alternative is to use a frequency counter loosely coupled to the uBitx and adjust for 10MHz.

So what you are describing is normal operation as supplied by HFSignals

73 and enjoy!
Evan

Re: uBITX V5 IS 2 kc low and birdies all around 10 MHz

jsternmd
 

Thanks Evan… Are all of these loud birdies scattered around near main MHz boundaries expected?  Many are lounder than an S9 signal.  I have my Flex 6700 and can switch rigs and antenna with single switch.  I tune in S9 stations on my Flex and they sound much quieter than many of these birdies.  I just hooked up my v3 board using same harness, encoder, pots etc.  First it is spot-on 10.000,000 MHz and while it has some birdies nothing as many or as loud as the v5 board.  I wonder what others think when they tune around the non-ham frequencies.

 

Jerry NY2KW

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Evan Hand
Sent: Tuesday, June 25, 2019 8:32 PM
To: BITX20@groups.io
Subject: Re: [BITX20] uBITX V5 IS 2 kc low and birdies all around 10 MHz

 

Check on this thread, as the calibration procedure changed from the v4 to v5 software.

https://groups.io/g/BITX20/topic/30236125

Note that the new process with HFSignals' firmware does go into transmit mode, and that you need a receiver and a dummy load (or else antenna) connected to the uBitx.  Then zero beat the signal against the other receiver tuned to 10 MHz.

The alternative is to use a frequency counter loosely coupled to the uBitx and adjust for 10MHz.

So what you are describing is normal operation as supplied by HFSignals

73 and enjoy!
Evan

uBITX v5 Tuning Related Emmisions #ubitx-help

giant
 

I noticed that when tuning I generate interference on other bands. I was listening on my VHF/UHF handheld attached to an antenna a few feet away from my HF dipole. Both run from my attic to my basement via LMR400 about 6" apart. I will try to take down the actual frequencies at some point over the next few days and try the UHF/VHF with the attic antenna vs duck antenna.

Is this a known issue? Is there anything I should check? Could it be coming from the board/raduino instead of the antenna?

Re: Has anybody gotten KD8CEC's SWR meter to work and can share how?

Mark Hatch
 

Nothing is wrong with the SWR meter, works perfectly as advertised once I fixed a bad solder joint. :-)

Not sure if I will leave it in,  saw one report of output loss. But I will confirm for myself when I get a moment...

73
Mark

Re: Ubitx occasionally hanging in transmit while receive led is on. Have to hit cw key a few times to get it unstuck. Ideas? #ubitx

Mark Hatch
 

I just had this very same problem and had a ground loop. Had two inputs to the second nano (KD8CEC's SWR meter from a Stockman bridge) and had not connected the ground wire for the bridge.Not only did it stay in transmits, but at one point even rebooted!

73
Mark
AJ6CU

Re: uBITX V5 IS 2 kc low and birdies all around 10 MHz

Evan Hand
 

I have been traveling for business for the last few months, so have not really used my uBitx much.  I built 2 v4 boards because of an issue with the first board (solder splash on the BFO mixer stage), so most is with the v4.  They changed the v5 SSB filter to 11.059 MHz to reduce the birdies caused by one of the Nano crystals.  I did have some birdies until I adjusted the calibration and BFO.  I would start with the BFO using a free audio spectrum analyzer program like:
http://www.techmind.org/audio/specanaly.html

I connect a mic to the PC and run the program and tune to a frequency with only static.  I then adjust the BFO so that the signal on the SA fits between 500 to 3khz.  Seems to be the best way to set it in my experience.

After I did that the birdies seemed to reduce, though not totally go away.

I also found that the uBitx is more susceptible to power supply noise.  Try testing with a battery to see if they go away.

Again, I have not used my v5 recently, so may still have them, just not on the frequencies that I was using at the time.

73
Evan
AC9TU