Date   
Re: Antuino fix

David Wilcox
 

Mike,

It worked for me and Farhan responded telling me my parts were on the way.

David J. Wilcox K8WPE’s iPad

On Jul 30, 2019, at 9:08 AM, Michael Aiello <n2htt.mike@...> wrote:

What is the email address for the parts request? hfsignals@... does not seem to be a good email address.
Thanks and 73
Mike N2HTT

Re: Cool cheap oscilloscope for troubleshooting

 

Very odd, not found any malware. McAfee and Malwarebytes.

Raj

At 31-07-19, you wrote:
The links you provided are full of Malware !!! I have to re-do my windows 10 machine because of the malware.....
Please use caution on clicking links....

Graham VE3WGW

CLKn frequencies for uBITx v5

Ravi Miranda
 

Hi,

I'm still trying to understand how the frequencies (3 of them)
interact and produce the final output.

Could I ask if some of you could send the frequencies (preferably
nn.nnnnnn) of CLK0, CLK1 and CLK2 for 14MHz (USB) and 7MHz(LSB) so
that I can compare the ones generated by my set.

I understand that the BFO may differ due to the characteristics of the
QER filter, but I can make allowances for that.

What do others think?

Kind regards,

Ravi/M0RVI

--
I'm here to add more value to the world than I'm using up.

Re: Cool cheap oscilloscope for troubleshooting

Don--AE4DW
 

No malware indication here either..not sure exactly what link is suspected as being the culprit, but sounds like there was already an existing "infection"..

Re: Cool cheap oscilloscope for troubleshooting

Don--AE4DW
 

As far as the scope options itself goes, I now realize Tom was referring to the JYE and clones I referenced when he mentioned 200 khz bandwidth, lol. Comparing specs, yes, that little matchbox unit seems to leave the JYE in the dust to some extent. The good thing is, for a 30 dollar investment and a definite impulse buy, you don't get too frustrated by limitations. I might need to read up on Tom's recommendation and try one out.

Re: Cool cheap oscilloscope for troubleshooting

Roy Appleton
 

"Of all the cheap oscilloscopes we have tested, we are the most impressed with this DSO188. Despite the small dimensions, the scope is easy to operate and the oscillogram is easy to interpret. It is easy to live in practice with a service life of about ninety minutes with one battery charge.
The only unfortunate thing about this beautiful device is that the DSO188 cannot be used to reliably measure the numerical values of the input signal. The manufacturer should have omitted this option, because a measurement function that is 'for reference only' is not very useful in practice. "

Roy 
WA0YMH

On Tue, Jul 30, 2019, 1:50 AM Tom, wb6b <wb6b@...> wrote:
Hi,

Anyone looking for a low cost scope to trouble shoot (a least audio and low frequency such as encoders) parts of their UBitx, these little oscilloscopes were on sale. I bought one. It only has a 1 Mhz bandwidth, but that is better than the 200 Khz bandwidth on many of the other cheap tiny scopes. 

So far I've liked it and have use it for observing some pulse width modulate signals where the frequency and duty-cycle readouts were handy. It is totally isolated when running on its battery. That is a nice feature. 

I have another radio with an intermittent causing both the transmit power and receive signal strength to abruptly change. Am planning to make an RF detector probe with a diode and capacitor and just leave this little scope attached to various points in the RF chain to see where I see the signal change in step with the change in my transmit power or S meter on receive (particularly the background noise floor on the S meter). This little scope won't take up a bunch of room while doing these measurements and may provide me with a little more interesting information than a DVM. 

https://www.banggood.com/DSO188-Pocket-Digital-Ultra-small-Oscilloscope-1M-Bandwidth-5M-Sample-Rate-Handheld-Oscilloscope-Kit-p-1315186.html?rmmds=home-mid-relatedViewed&cur_warehouse=CN

Here is a review on a site that specializes in trying out low cost Chinese electronic gizmos. Not sure if my later model is calibrated better than the one he tested, but did not strike me as really bad. 

https://chinese-electronics-products-tested.blogspot.com/p/dso188-matchbox-scope-tested.html

Tom, wb6b

----

----

Re: Cool cheap oscilloscope for troubleshooting

Ashhar Farhan
 

An easy way to extend the upper frequency range of an oscilloscope is to use a 'down converter' - a diode mixer driven by a VFO, like a direct conversion receiver. The mixer output is fed to the oscilloscope.
About ten years ago, I wrote in a blog post that serious homebrewing needs a good scope. I must revise my claim. You need a spectrum analyzer of some sort. The reason is that our work is frequency domain.  Our circuit blocks are filters, mixers, amplifiers and oscillators. All of them have inputs and outputs specified in terms of frequencies.
It is this realization that led to the development of antuino. But that is a separate post..

On Wed 31 Jul, 2019, 6:10 PM Roy Appleton, <twelveoclockhigh@...> wrote:
"Of all the cheap oscilloscopes we have tested, we are the most impressed with this DSO188. Despite the small dimensions, the scope is easy to operate and the oscillogram is easy to interpret. It is easy to live in practice with a service life of about ninety minutes with one battery charge.
The only unfortunate thing about this beautiful device is that the DSO188 cannot be used to reliably measure the numerical values of the input signal. The manufacturer should have omitted this option, because a measurement function that is 'for reference only' is not very useful in practice. "

Roy 
WA0YMH

On Tue, Jul 30, 2019, 1:50 AM Tom, wb6b <wb6b@...> wrote:
Hi,

Anyone looking for a low cost scope to trouble shoot (a least audio and low frequency such as encoders) parts of their UBitx, these little oscilloscopes were on sale. I bought one. It only has a 1 Mhz bandwidth, but that is better than the 200 Khz bandwidth on many of the other cheap tiny scopes. 

So far I've liked it and have use it for observing some pulse width modulate signals where the frequency and duty-cycle readouts were handy. It is totally isolated when running on its battery. That is a nice feature. 

I have another radio with an intermittent causing both the transmit power and receive signal strength to abruptly change. Am planning to make an RF detector probe with a diode and capacitor and just leave this little scope attached to various points in the RF chain to see where I see the signal change in step with the change in my transmit power or S meter on receive (particularly the background noise floor on the S meter). This little scope won't take up a bunch of room while doing these measurements and may provide me with a little more interesting information than a DVM. 

https://www.banggood.com/DSO188-Pocket-Digital-Ultra-small-Oscilloscope-1M-Bandwidth-5M-Sample-Rate-Handheld-Oscilloscope-Kit-p-1315186.html?rmmds=home-mid-relatedViewed&cur_warehouse=CN

Here is a review on a site that specializes in trying out low cost Chinese electronic gizmos. Not sure if my later model is calibrated better than the one he tested, but did not strike me as really bad. 

https://chinese-electronics-products-tested.blogspot.com/p/dso188-matchbox-scope-tested.html

Tom, wb6b

----

----

Re: FS: QRP Gear

MadRadioModder
 

No… Quite the opposite.  I didn’t realize the moderator allowed it.  Most groups won’t.   Very good to know… I have rooms of stuff to sell and if its free (!) to advertise here…  At least thanks for setting the precedent.  I guess your closing should have been tipped me off (DUH!).

 

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of N8DAH
Sent: Tuesday, July 30, 2019 8:28 PM
To: BITX20@groups.io
Subject: Re: [BITX20] FS: QRP Gear

 

People sell qrp gear here from time to time. I am in a pinch and need to sell some gear. I didn't realize this was news or you took personal offense....
--
David

 N8DAH
Kit-Projects.com

Shop is open!


Virus-free. www.avg.com

--

…_. _._

Re: Cool cheap oscilloscope for troubleshooting

Jack, W8TEE
 

My club has a small knot of members who enjoy building stuff. Like everyone else, most of them can't justify the expense of $250 for a decent oscilloscope. One of our "serious" builders in the club upgraded his scope and donated his old scope to the club. Now anyone can use the club's scope for a project. So far, there's not been enough members wanting to use it at the same time to be a problem. This is now a benefit of being a member..access to some pretty decent test equipment. That same member gave a presentation on how to use the scope and it was well-received.

I guess my point is: Instead of spending $25-$50 on a device and may or may not be sufficient to get the job done, consider acquiring a scope for the club. A new scope good to 100MHz is about $250, but hamfest, Craigs List, and other places have good used scopes at reasonable cost. Depending upon the size and makeup of your club, it might be a viable solution.

Jack, W8TEE

On Wednesday, July 31, 2019, 10:43:48 AM EDT, Ashhar Farhan <farhanbox@...> wrote:


An easy way to extend the upper frequency range of an oscilloscope is to use a 'down converter' - a diode mixer driven by a VFO, like a direct conversion receiver. The mixer output is fed to the oscilloscope.
About ten years ago, I wrote in a blog post that serious homebrewing needs a good scope. I must revise my claim. You need a spectrum analyzer of some sort. The reason is that our work is frequency domain.  Our circuit blocks are filters, mixers, amplifiers and oscillators. All of them have inputs and outputs specified in terms of frequencies.
It is this realization that led to the development of antuino. But that is a separate post..

On Wed 31 Jul, 2019, 6:10 PM Roy Appleton, <twelveoclockhigh@...> wrote:
"Of all the cheap oscilloscopes we have tested, we are the most impressed with this DSO188. Despite the small dimensions, the scope is easy to operate and the oscillogram is easy to interpret. It is easy to live in practice with a service life of about ninety minutes with one battery charge.
The only unfortunate thing about this beautiful device is that the DSO188 cannot be used to reliably measure the numerical values of the input signal. The manufacturer should have omitted this option, because a measurement function that is 'for reference only' is not very useful in practice. "

Roy 
WA0YMH

On Tue, Jul 30, 2019, 1:50 AM Tom, wb6b <wb6b@...> wrote:
Hi,

Anyone looking for a low cost scope to trouble shoot (a least audio and low frequency such as encoders) parts of their UBitx, these little oscilloscopes were on sale. I bought one. It only has a 1 Mhz bandwidth, but that is better than the 200 Khz bandwidth on many of the other cheap tiny scopes. 

So far I've liked it and have use it for observing some pulse width modulate signals where the frequency and duty-cycle readouts were handy. It is totally isolated when running on its battery. That is a nice feature. 

I have another radio with an intermittent causing both the transmit power and receive signal strength to abruptly change. Am planning to make an RF detector probe with a diode and capacitor and just leave this little scope attached to various points in the RF chain to see where I see the signal change in step with the change in my transmit power or S meter on receive (particularly the background noise floor on the S meter). This little scope won't take up a bunch of room while doing these measurements and may provide me with a little more interesting information than a DVM. 

https://www.banggood.com/DSO188-Pocket-Digital-Ultra-small-Oscilloscope-1M-Bandwidth-5M-Sample-Rate-Handheld-Oscilloscope-Kit-p-1315186.html?rmmds=home-mid-relatedViewed&cur_warehouse=CN

Here is a review on a site that specializes in trying out low cost Chinese electronic gizmos. Not sure if my later model is calibrated better than the one he tested, but did not strike me as really bad. 

https://chinese-electronics-products-tested.blogspot.com/p/dso188-matchbox-scope-tested.html

Tom, wb6b

----

----

Re: FS: QRP Gear

Arv Evans
 


Topic and focus of this group is BITX designs, builds, modifications, support, and operation...but
there is probably room for limited deviation from the theme and for individual sales of personal
QRP equipment  Maybe we could assume or hope that by selling your non-BITX rigs you are
accumulating funds to buy a BITX?  Mentioning your for-sale QRP item or related equipment
web site is probably not a bad thing unless the opportunity is abused.  The moderators do
review what is being posted in an attempt to insure that the group stays relatively on-topic
and is of value to BITX designers, builders, and operators.

This BITX group includes a very diverse group of members from almost every country and
background.  Please keep this in mind when posting because we would not want to offend
any of our members. 

Arv  K7HKL
_._




On Wed, Jul 31, 2019 at 8:54 AM MadRadioModder <madradiomodder@...> wrote:

No… Quite the opposite.  I didn’t realize the moderator allowed it.  Most groups won’t.   Very good to know… I have rooms of stuff to sell and if its free (!) to advertise here…  At least thanks for setting the precedent.  I guess your closing should have been tipped me off (DUH!).

 

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of N8DAH
Sent: Tuesday, July 30, 2019 8:28 PM
To: BITX20@groups.io
Subject: Re: [BITX20] FS: QRP Gear

 

People sell qrp gear here from time to time. I am in a pinch and need to sell some gear. I didn't realize this was news or you took personal offense....
--
David

 N8DAH
Kit-Projects.com

Shop is open!


Virus-free. www.avg.com

--

…_. _._

Re: FS: QRP Gear

 

I have been on here a long time both as a user of the bitx rigs and maker of bitx related items as my site shows. I would not normally post here for selling items outside of the bitx but I am in a real tight spot atm due to a few issues beyond my control and need to move a few items fast.

I have sold most of the items and will go back to my normal bitx related posts please don't get the wrong idea.

 As Arv has said its been generally ok to sell items qrp related from time to time but don't abuse that or it may become a issue where they block, delete or mute it in the future.
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: FS: QRP Gear

twowindsbear@...
 

Are you the owner of  this site: Kit-Projects.com?  Why don't you also list your used equipment on the Gear/Used Gear page at the site?

Re: FS: QRP Gear

 

I would but having done that in the past with other items didn't work. I have found selling them via qrz works better then the hope someone will stumble on them on my store front. Most people come to my site for the AGC and other bitx items.

Again I had to move the items quickly and posting here and on other qrp groups got the job done.
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: Cool cheap oscilloscope for troubleshooting

Robert D. Bowers
 

One of my dream purchases for radio is a functional spectrum analyzer that is reasonably accurate.  I use a dongle right now as a 'poor man's spectrum analyzer", although it has some serious limitations - like taking things in a 1mhz 'bite' at a time, plus compression of the signal makes db measurements only an estimate at best.  It works for checking for deviation or for spotting unwanted signals, but not that well.

The bottom end of my dongle is also around 25mhz... I have some parts to cobble together an up-converter, but haven't had the time to work on that (first I need to get my old HF rig going again).

I know that there are some kits out now (plus units from China) that work, but their price is outside of my reach.  Maybe things will get better!

Bob

N4FBZ

On 7/31/19 10:43 AM, Ashhar Farhan wrote:
An easy way to extend the upper frequency range of an oscilloscope is to use a 'down converter' - a diode mixer driven by a VFO, like a direct conversion receiver. The mixer output is fed to the oscilloscope.
About ten years ago, I wrote in a blog post that serious homebrewing needs a good scope. I must revise my claim. You need a spectrum analyzer of some sort. The reason is that our work is frequency domain.  Our circuit blocks are filters, mixers, amplifiers and oscillators. All of them have inputs and outputs specified in terms of frequencies.
It is this realization that led to the development of antuino. But that is a separate post..

On Wed 31 Jul, 2019, 6:10 PM Roy Appleton, <twelveoclockhigh@...> wrote:
"Of all the cheap oscilloscopes we have tested, we are the most impressed with this DSO188. Despite the small dimensions, the scope is easy to operate and the oscillogram is easy to interpret. It is easy to live in practice with a service life of about ninety minutes with one battery charge.
The only unfortunate thing about this beautiful device is that the DSO188 cannot be used to reliably measure the numerical values of the input signal. The manufacturer should have omitted this option, because a measurement function that is 'for reference only' is not very useful in practice. "

Roy 
WA0YMH

On Tue, Jul 30, 2019, 1:50 AM Tom, wb6b <wb6b@...> wrote:
Hi,

Anyone looking for a low cost scope to trouble shoot (a least audio and low frequency such as encoders) parts of their UBitx, these little oscilloscopes were on sale. I bought one. It only has a 1 Mhz bandwidth, but that is better than the 200 Khz bandwidth on many of the other cheap tiny scopes. 

So far I've liked it and have use it for observing some pulse width modulate signals where the frequency and duty-cycle readouts were handy. It is totally isolated when running on its battery. That is a nice feature. 

I have another radio with an intermittent causing both the transmit power and receive signal strength to abruptly change. Am planning to make an RF detector probe with a diode and capacitor and just leave this little scope attached to various points in the RF chain to see where I see the signal change in step with the change in my transmit power or S meter on receive (particularly the background noise floor on the S meter). This little scope won't take up a bunch of room while doing these measurements and may provide me with a little more interesting information than a DVM. 

https://www.banggood.com/DSO188-Pocket-Digital-Ultra-small-Oscilloscope-1M-Bandwidth-5M-Sample-Rate-Handheld-Oscilloscope-Kit-p-1315186.html?rmmds=home-mid-relatedViewed&cur_warehouse=CN

Here is a review on a site that specializes in trying out low cost Chinese electronic gizmos. Not sure if my later model is calibrated better than the one he tested, but did not strike me as really bad. 

https://chinese-electronics-products-tested.blogspot.com/p/dso188-matchbox-scope-tested.html

Tom, wb6b

----

----

Attachments:

Re: Cool cheap oscilloscope for troubleshooting

Doug Hall
 

Jack's point is well made. I'm all for saving money, but of all the places to cut corners test equipment is not one of them. The biggest flaw in the $25-$50 'scopes is not their lack of features or low bandwidth, it is their lack of measurement accuracy. And when you think about it, measurement accuracy is the reason we buy test equipment in the first place. 

You can buy a new Rigol DS1102E for $300. That's a dual channel 1 gigasample per second, 100 MHz bandwidth 'scope with two decent X10 probes and a host of features such as FFT (use it as a spectrum analyzer), PC connectivity, USB, on-screen help, and math features. Talk your club or a few of your buddies into going in with you if you can't justify $300. But a decent oscilloscope is worth what you pay for it. 

Speaking of Rigol equipment, several years ago I saved my toy money and bought a Rigol DSA-815 spectrum analyzer with a tracking generator. For the money you can't beat it. Besides measuring stuff like spectral purity and TX IMD3 you can also measure filters and tune duplexers, check coaxial cable loss, and a host of other things. 

73,
Doug K4DSP


On Wed, Jul 31, 2019 at 08:03 AM, Jack Purdum wrote:
 
I guess my point is: Instead of spending $25-$50 on a device and may or may not be sufficient to get the job done, consider acquiring a scope for the club. A new scope good to 100MHz is about $250, but hamfest, Craigs List, and other places have good used scopes at reasonable cost. Depending upon the size and makeup of your club, it might be a viable solution.
 
Jack, W8TEE

Re: Cool cheap oscilloscope for troubleshooting

SAM R BURNES
 

Another option is the Digilent Analog Discovery 2 Package. A computer connected device (see at: https://store.digilentinc.com/ham-radio-workbench-bundle/).

By using the code “HamRadioWorkbench2019” in your cart prior to checkout one can save $100.00.

Not associated with them in any way, just passing on the info.

73,

Sam
WY8V


On Jul 31, 2019, at 1:51 PM, Doug Hall <k4dsp.doug@...> wrote:

Jack's point is well made. I'm all for saving money, but of all the places to cut corners test equipment is not one of them. The biggest flaw in the $25-$50 'scopes is not their lack of features or low bandwidth, it is their lack of measurement accuracy. And when you think about it, measurement accuracy is the reason we buy test equipment in the first place. 

You can buy a new Rigol DS1102E for $300. That's a dual channel 1 gigasample per second, 100 MHz bandwidth 'scope with two decent X10 probes and a host of features such as FFT (use it as a spectrum analyzer), PC connectivity, USB, on-screen help, and math features. Talk your club or a few of your buddies into going in with you if you can't justify $300. But a decent oscilloscope is worth what you pay for it. 

Speaking of Rigol equipment, several years ago I saved my toy money and bought a Rigol DSA-815 spectrum analyzer with a tracking generator. For the money you can't beat it. Besides measuring stuff like spectral purity and TX IMD3 you can also measure filters and tune duplexers, check coaxial cable loss, and a host of other things. 

73,
Doug K4DSP

On Wed, Jul 31, 2019 at 08:03 AM, Jack Purdum wrote:
 
I guess my point is: Instead of spending $25-$50 on a device and may or may not be sufficient to get the job done, consider acquiring a scope for the club. A new scope good to 100MHz is about $250, but hamfest, Craigs List, and other places have good used scopes at reasonable cost. Depending upon the size and makeup of your club, it might be a viable solution.
 
Jack, W8TEE

Re: bitx and ubitx encoder replace ment

Sascha Bohnet | DL5SMB
 

Thanks Robert, that was the push into the right direction.Now I was able to disassemble it and removed the detent.
I am building my second uBITX at the moment and am really excited to try out this encoder. Hopefully this weekend i will be ready to test the function.

AMP FOR UBITX

bill steffey NY9H
 

FINALLY GIVING UP MY TT 405 AMP ... ON EBAY


WORKED GREAT WITH MY UBITX !!!

BILL NY9H

Re: CLKn frequencies for uBITx v5

Jerry Gaffke
 

Ravi,

Take a look at this old post:
    https://groups.io/g/BITX20/message/44515

Jerry, KE7ER


On Wed, Jul 31, 2019 at 04:53 AM, Ravi Miranda wrote:
I'm still trying to understand how the frequencies (3 of them)
interact and produce the final output.

Re: AMP FOR UBITX

Skip Davis
 

So your thinning out the crowd of equipment you have? Are you making room for the K4? Nice to see you are active on the reflectors.

Skip Davis, NC9O

On Jul 31, 2019, at 19:11, bill steffey NY9H <Ny9h@...> wrote:

FINALLY GIVING UP MY TT 405 AMP ... ON EBAY


WORKED GREAT WITH MY UBITX !!!

BILL NY9H