I had the same problem when transmitting with the mike (not CW) ?which I couldn't resolve with the solutions proposed in the posts I could find.
I resolved the issue by installing a capacitor between the red wire (PTT) and the yellow wire (ground) on the Arduino plug. ?Unsure of the value however the red square caps read:
WIMA
0.1
100-
RD or RQ (not clear)
Yves vk2auj/ve2auj
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DIGITAL FREQUENCY READOUT
MAYBE I AM MISSING SOMETHING, BUT ARE ALL uBITX V4.3 RADIOS HAVE A ONE KHZ LOW READOUT. FOR EXAMPLE, IF I HAVE A STATION ON 7.150 SELECTED, IT READS OUT 7.149 FOR CLEAR RECEPTION. IS THIS NORMAL?
WILLIAM
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Re: Tool advice: contemporary oscilloscopes and Spectrum Analyzers
That's a very good deal for somebody, and a very kind offer.
20mhz of BW is good enough to debug stuff at 40 and 80 meters,
and maybe a little higher too if you know what to expect.
Suitable scope probes are $5 from the Chinese suppliers.
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On Wed, Nov 7, 2018 at 06:13 PM, Gwen Patton wrote:
If anyone is in the Philadelphia area and would like an old BK Precision 2-channel CRO, drop me an email. I'm willing to give it away. But you buy your own probes, I bought probes for it that I'm using with the Rigol now.
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Hmm.
Sounds like some future uBitx v5 may prove interesting.
The QSX looks promising too, but not very hackable.
Jerry
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On Wed, Nov 7, 2018 at 05:58 PM, Ashhar Farhan wrote:
You will have to connect the sound card. There isnt any DSP in the ubitx, yet...
- f
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Re: Tool advice: contemporary oscilloscopes and Spectrum Analyzers
I had gotten an old CRO on ebay for $40, delivered, but it was only two channels and 20mhz bandwidth, too low for anything except audio stuff. I gather this one might have been used for automotive sound system work. Instead, I have a?Rigol DS1054Z that I got on Amazon for about $350. They're at $375 on Amazon right now. I lucked out, and it had a big bundle of features on it, including all the analyzer stuff they usually sell you as a separate unlock code. It's only a 50mhz unit, but I got the unlock code that bumped it up to 100mhz, and it has the benefit of being a 4-channel. I also have an Digilent Analog Discovery 2, a nice device for portable and educational use, and I backed the Espotek Labrador development project, which resulted in a simple $29 w/free shipping 2-channel DSO with a bunch of other features, suitable for plugging onto a breadboard for project development. Here's the feature list from the website:
about Labrador:?Labrador is an all-in-one tool for electronics students, makers and hobbyists. Just plug your Labrador board into a PC (Windows/Mac/Linux), Raspberry Pi or Android device via a MicroUSB cable, load up the software and you instantly have the following engineering tools at your disposal:
- Oscilloscope (2 channel, 750ksps)
- Arbitrary Waveform Generator (2 channel, 1MSPS per channel)
- Power Supply (4.5 to 15V, 0.75W max output, with closed-loop feedback)
- Logic Analyzer (2 channel, 3MSPS per channel, with serial decoding)
- Multimeter (V/I/R/C)
It's a useful little gadget that the developer is still improving with more features in the software. The only problem I had with it was the abysmal serial support in recent versions of Linux. The thing worked fine in 14.04, but starting with 16.04 the drivers wouldn't see the thing when you plugged it in. Since my bench machine was an old laptop with Linux installed, that was a bit of an issue. So I bit the bullet, and bought the Rigol and a small Asus Win10 machine for the bench. They work quite nicely now. If anyone is in the Philadelphia area and would like an old BK Precision 2-channel CRO, drop me an email. I'm willing to give it away. But you buy your own probes, I bought probes for it that I'm using with the Rigol now. Gwen, NG3P
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You will have to connect the sound card. There isnt any DSP in the ubitx, yet... - f
On Wed, 7 Nov 2018, 00:14 M. LeBlanc < mm@... wrote:
Hello,
I heard about one or several other QRP kits that come with FT8 in the radios OS.? Is FT8 something that can be worked in to a Micro-Bitx with a phone or PC For time and display but without a sound-card interface?
Thanks,
Misha VE9GIS FN76
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Re: Harmonics and Relay Replacement
Ben, NO5K, ran some Smith Charts on a "pristine" V3.0 board (thanks Gene, WB4KTF) followed by ONLY changing the the relays to AXICOM relays .....same fixture setup, 50 ohm antenna termination, same cables, same test gear. The harmonic attenuation plots show somewhat better harmonics reduction with the AXICOM relays but the rolloff (a filter characteristic) is basically the same between the two as you would expect them to be. The Smith Charts are basically the same between the two relays (Original and AXICOM) and tell the story. It's not the relays themselves in my opinion. It's the coupling from board layout, coupling between relays, coupling across relays, and wire routing ......resulting in wide swings from reflected capacitive impedance to reflected inductive impedance in the filter frequencies (.....like in filter passband frequencies, filter roll off frequencies, and filter stop band frequencies) and presenting that reflected waveform back into the PA section.? ? As I mentioned earlier the AXICOM relays DO show improvement but it's not the whole story. The attached charts are small, but can be expanded. The goal is to get the general idea.?? 73 Kees K5BCQ  ? AXICOM RELAYS  ORIGINAL uBITX RELAYS
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Re: Tool advice: contemporary oscilloscopes and Spectrum Analyzers
If he is only interested in HF stuft, then he can build the specan over ten evenings. On the other hand, if he is interested in VHF and UHF, then the Rigol DS815 with tracking generator is best. He will also need a variable attenuator, a fixed power attenuator, a dozen cables and an audio tone generator, an RF two tone generator. These accessories are all easily build at home. About 5 years ago, when the specan bug bit me (while doing the Minima), I looked around for a used specan. I finally located one in bangalore for 100,000 rupees (about 1500 usd). I was almost ready to put down that money when I decided to try building one for a month before buying one. I ended up building the specan. I did ultimately buy the Rigol specan too as I needed UHF coverage for building the exseedsat. If there is sufficient interest, we all can pool efforts to produce a kit for the specan. We should shoot for an $100?bag of parts and PCB. The unfortunate challenge of building the specan is that it needs extensive shielding. Hence a particular layout, with shields, is mandatory. This maybe out of thr capability of thr current 'paint by numbers' team of HF Sigs. Happy Diwali to all! - f
On Thu, 8 Nov 2018, 07:06 Richard Spohn < wb2gxm@... wrote: I recently passed up the Rigol line in favor of a Hantek 2-channel
200-mhz scope that is priced under $300.? -- Rich WB2GXM
On 11/7/18, iz oos <and2oosiz2@...> wrote:
> Hi, a friend wants to replace his 30+Y old stuff. I said experienced hams
> use Rigol stuff, which good models would you suggest that do not cost a leg
> to be used with modern and vintage PA/rigs?
>
>
>
>
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Re: Tool advice: contemporary oscilloscopes and Spectrum Analyzers
I recently passed up the Rigol line in favor of a Hantek 2-channel
200-mhz scope that is priced under $300. -- Rich WB2GXM
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On 11/7/18, iz oos <and2oosiz2@...> wrote: Hi, a friend wants to replace his 30+Y old stuff. I said experienced hams
use Rigol stuff, which good models would you suggest that do not cost a leg
to be used with modern and vintage PA/rigs?
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Re: Boy Scout activity event
Jack, imho, CW is surprisingly alive and well, and how many years or
dfecades since its requirement was removed? I believe that, outside
of the fact that in an emergency CW is the most reliable mode, that IT
IS FUN TO LEARN AND USE. It is a game, and the entire millenial
attitude towards smartphones is about games and using their "toy".
The fun of CW and achieving proficiecy in it keeps it alive. -- Rich
WB2GXM
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On 11/7/18, Jack Purdum via Groups.Io <jjpurdum@...> wrote: This is how I got started in ham radio in 1954. We did a field trip to
W8FTQ's QTH in Medina, OH, to hear his weekly schedule with his son...in
SOUTH AFRICA!! The hook was set and I've been licensed ever since.
That was then...this is now.
My experience with HT's is that young kids today have cell phones and, more
than once, I've been asked: "Why get a license when I can do the same thing
on my cell phone?" I point out that with ham radio, you can control things
yourself...you don't need a cell tower. I usually point out that the storm
in Sandy Hook, NJ, took out every mode of communications except ham radios.
In some cases, we were the only means of communication. Be prepared for
similar questions.
Another issue I've mentioned before: Our club had a GOTO station at Field
Day and we had a 13 year old who talked to a guy in CA and was so excited he
could barely contain himself. After about an hour at the radio, his mother
showed up and he literally burst telling her what he had just done. She
said: "It looks like a wonderful hobby, but where are you going to get the
thousands of dollars for the radio?" The boy looked like he had been
shot.This is where I would drag out a ?BITX, hold it up, and say: "Add a
battery, a $20 antenna, $130, a license, and you can start talking to the
world yourself."? I think a low-cost entry point is important to lawn-mowing
budget (scout-aged) people and their parents.
Your planned activity is a great one and I'm sure they'll have fun doing it.
That said, I would have some pictures of your rig at home and tell them
that, with it, you have made friends and talked with people all over the
world.
Now, if someone can just tell me how to sell learning CW to my club members,
I'll die a happy camper. You'd be amazed how many people have to re-arrange
their sock drawer on the very day I suggest for a CW class...
Jack, W8TEE
On Wednesday, November 7, 2018, 9:22:33 AM EST, Art Olson
<olson339@...> wrote:
I am looking for some ideas that can be used in a 30 minute window, or
less, to introduce ham radio to a dozen scouts. My idea is to employ a few
HTs in simplex mode, divide the the groups into 2 or 3 per team. Have each
team search for something ( not defined) using the HTs and clues to where
the something is located. Each team will have a licensed operator with them
during the activity. Also this will be an evening event in a church activity
building. Any ideas welcome. This is an opportunity to spark interest and
get involved for the scouts.
73
Art N2AJO
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Re: Boy Scout activity event
That QSL card game is a great idea. I would use it as part of training for people who don't yet have their ticket.
TKS
73
?
Sent:?Wednesday, November 07, 2018 at 4:51 PM
From:?"Anthony Luscre" <k8zt73@...>
To:[email protected]
Subject:?Re: [BITX20] Boy Scout activity event
Here is a link to an article I wrote for Ohio section Journal on ideas for school radio clubs-
?
On Wed, Nov 7, 2018 at 3:41 PM Art Olson via Groups.Io <olsonaj6927= [email protected]> wrote:
Want to thank everyone one for the great selections. I will take these and any others and see what interests them. Thanks Doug. For the suggestion. By the way all of these are great ideas and will get used over the next few months
?
Art
?
?
Can you talk to one or more of the scouts before the event?? The easiest way to connect with your audience is to know your audience and what matters to them.? There are several ideas already in this thread that sound like good ideas to me.? The problem is, I am willing to bet I am one of the younger people reading this and the last time I wore a neckerchief was around the time we were huddled around the TV watching the first space shuttle launch so what I think is interesting doesn't really matter.? What about taking some of these ideas and asking a few of the kids what they think?
--
?
?
?
?
--
Anthony Luscre
?
K8ZT
Assistant Ohio Section Manager for Education Outreach
ARRL - The National Association For Amateur Radio?
?
a@... (best for Education & Technology)
?
The Web Resource Hoarder-
Web Resource Hoarder Blog
?
K8ZT Radio Website-
My Radio Blog-?
?
?
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Re: Boy Scout activity event
Here is a link to an article I wrote for Ohio section Journal on ideas for school radio clubs-
On Wed, Nov 7, 2018 at 3:41 PM Art Olson via Groups.Io <olsonaj6927= [email protected]> wrote: Want to thank everyone one for the great selections. I will take these and any others and see what interests them. Thanks Doug. For the suggestion. By the way all of these are great ideas and will get used over the next few months
Art Can you talk to one or more of the scouts before the event?? The easiest way to connect with your audience is to know your audience and what matters to them.? There are several ideas already in this thread that sound like good ideas to me.? The problem is, I am willing to bet I am one of the younger people reading this and the last time I wore a neckerchief was around the time we were huddled around the TV watching the first space shuttle launch so what I think is interesting doesn't really matter.? What about taking some of these ideas and asking a few of the kids what they think?
--
-- Anthony Luscre
K8ZT Assistant Ohio Section Manager for Education Outreach ARRL - The National Association For Amateur Radio? ?
a@... (best for Education & Technology)
The Web Resource Hoarder- Web Resource Hoarder Blog
K8ZT Radio Website- My Radio Blog-?
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Re: Boy Scout activity event
Working a little DX can
be exciting for the scouts. Do you have any wiresX repeaters in
the
area. It can be a great show to listen to hams in So.Africa, New
Zealand, America all talking
together on a handheld on two meters. I set up a demo years ago
using a computer and a tran-
sceiver and they could read the morse code on the display (the
contact was Iowa to England)
A backup plan would be to use echolink.
On 11/7/2018 8:22 AM, Art Olson wrote:
I am looking for some ideas that can be used in a 30 minute
window, or less, to introduce ham radio to a dozen scouts. My idea
is to employ a few HTs in simplex mode, divide the the groups into
2 or 3 per team. Have each team search for something ( not
defined) using the HTs and clues to where the something is
located. Each team will have a licensed operator with them during
the activity. Also this will be an evening event in a church
activity building. Any ideas welcome. This is an opportunity to
spark interest and get involved for the scouts.
73
Art N2AJO?
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I still have three sets of components as described....$10 includes postage.
73
John
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Re: Boy Scout activity event
Want to thank everyone one for the great selections. I will take these and any others and see what interests them. Thanks Doug. For the suggestion. By the way all of these are great ideas and will get used over the next few months
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On Nov 7, 2018, at 12:47 PM, Doug W < dougwilner@...> wrote: Can you talk to one or more of the scouts before the event?? The easiest way to connect with your audience is to know your audience and what matters to them.? There are several ideas already in this thread that sound like good ideas to me.? The problem is, I am willing to bet I am one of the younger people reading this and the last time I wore a neckerchief was around the time we were huddled around the TV watching the first space shuttle launch so what I think is interesting doesn't really matter.? What about taking some of these ideas and asking a few of the kids what they think?
--
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Did anyone find out how to cure this problem? I am presently having the same with CEC ver 1.1
73 Roger ZL2RX
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Re: Harmonics and Relay Replacement
Well done Matthias, I will refuse to trade my ubitx for two 817 then :)
Il 07/nov/2018 20:19, "Matthias Zwoch" < zwoch@...> ha scritto: After mounting of Axicom relais we did some measurements at our local club. The pictures (sri for the quality) show the CW signal of uBitx 4.3
on 3,5-7-14-18-21-24 and 28 MHz and the filename lists the span. Only on 3.5 MHz there are some harmonics - but well down below 50dB. Forgot to take a foto on 10.1 MHz- but no harmonics there too. The frequency shown at the screeshot differs a bit - this happens because the wide span. Most measurements were made at the lower band edge.
We played also with SSB to watch the spurs. We found some. But also well below 50 dB down.
At the moment my uBItx has the relay fix and L7,L5,L1 are replaced by SMD and it is fully compliant with the RegTP rules.
73 Matthias DD7NT
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Re: Harmonics and Relay Replacement
After mounting of Axicom relais we did some measurements at our local club. The pictures (sri for the quality) show the CW signal of uBitx 4.3
on 3,5-7-14-18-21-24 and 28 MHz and the filename lists the span. Only on 3.5 MHz there are some harmonics - but well down below 50dB. Forgot to take a foto on 10.1 MHz- but no harmonics there too. The frequency shown at the screeshot differs a bit - this happens because the wide span. Most measurements were made at the lower band edge.
We played also with SSB to watch the spurs. We found some. But also well below 50 dB down.
At the moment my uBItx has the relay fix and L7,L5,L1 are replaced by SMD and it is fully compliant with the RegTP rules.
73 Matthias DD7NT
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Re: VK3YE AGC Not Doing It
http://ubitx.net/mod-tx-compression/
?
SSM 2167 for microphone compression.
?
?
Could work as a type of AGC too..
?
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Re: Boy Scout activity event
What games can I play on it?? ? ;-)
All kidding aside, Doug's right.? Need to figure out what they are interested in.
Though they may not know they'll be interested in something
if they have never heard, seen, or smelled it.
(A KW tube rig smells of frying dust and a hint of ozone, which might be novel.)
Maybe have a half dozen different things to expose them to briefly,
then go back and spend more time on whatever it is that they show interest in.
Jerry
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On Wed, Nov 7, 2018 at 09:47 AM, Doug W wrote:
What about taking some of these ideas and asking a few of the kids what they think?
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Yves Bernier VK2AUJ
Gwen Patton
Anthony Luscre
ekelley
