Re: Collins Amateur Radio Club - excellent BITX article
Dear Robert, Thank you. By the way please give your opinion about V5, 2018 MULTI BAND 10W QRP KIT. De? VU2UYC, Handle Balsun, from Kerala, INDIA. 73s
On Tue, May 7, 2019 at 11:48 AM Robert McClements < gm4cid@...> wrote: The attached April?Collins Amateur Radio Club Newsletter has a very comprehensive BITX article by?Vince Loschiavo N2AIE which he has posted to the FB group.
Though it worthwhile to post here, hope Vince doesn't mind.
73, Bob GM4CID
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Locked
Re: bad news and a bit of good news.
How does this topic, even remotely relate to the BitX subject?? Amazing.. Rich
-----Original Message-----
From: RICHARD
Sent: May 7, 2019 9:34 AM
To: "[email protected]"
Subject: Re: [BITX20] bad news and a bit of good news.
Take this topic some were else.? If you are so hard up, you do not need a hobby.? Sell all your radio gear and support your family.? Been there done that.
K6KWQ
Dick
?
Sent from for Windows 10
?
(Yeah, another book...)
Add to that the fact that insurance companies generally charge poor people extra for insurance (at least, in this hellhole of a state), and if the vehicle is lost, will only pay you the blue book value if you're lucky.? Been there.? An old pickup... you
probably will recover only a portion of your yearly premium.
The corporations assume that if you can't afford their rates, you can walk or take a bus (never mind that there are more poor people AWAY from the cities than within... and bus service doesn't cover most of this country)!
(The below is for the "blame game" people, Wayne, who seem to be very common in amateur radio and in certain.. buildings.? I would admit that maybe people don't understand how the rest of us are forced to live and assume that we've got extra money to
spare.? I'm only too used to hearing this stuff and I know how much it hurts!)
It's also hard to buy "extra" insurance when you don't have a nice income.? We've been where we had to make do with "potato and onion soup" for our meals over several days recently, in trying to have the money to pay our bills.? That is normal... and things
like food stamps help, although the program is based on 1960s data and doesn't begin to cover the cost of food today (add to that the sad fact that when poor people try to have a decent, balanced diet like everyone else, people judge them {wrongly} and will
attack them - even to their face in line!)
Another tidbit - the person being attacked might be disabled, and most very real disabilities are not 'visible'.? A recent news article was revealing - only 23.7% of people with disabilities have been able to hold a full time job for more than one year.?
The ADA isn't working as it should - it's being used more to provide tax breaks for corporations rather than getting people gainfully employed!? They may be trying to survive on very little - and having extra cash to buy more insurance... not a possibility.
Another tidbit - most homeless people are young families, not the lazy drunk or doper that is the stereotype.? People who are homeless and used drugs generally didn't start until after they became homeless - using drugs was a coping mechanism to deal with
the hellish stigma they experience.? The top ten reasons for homelessness - the first five are purely economic (job loss to downsizing or shipped overseas, hour or wage reduction if not outright wage theft, and so on).? Mental illness... if I remember right,
it was 7th.? Drug use or alcoholism was 9th or lower.
In other words, poverty is usually not the result of personal failings, but usually a social evil caused by structures and policies.? People who haven't been there don't understand how rough it can be.
I've noticed a tendency in some of the people on this blog to blame people who've had a hard time, and to make suggestions that they may not realize are insulting.? It's easy to blame the person who had the problem, and ignore the person who CAUSED the problem.
Anyway, Wayne... it sounds like you've got a pretty good support base - the reality of poverty in the USA is that's the only way most poor people survive.? I was worried about that.
I can suggest a lot of good books (and research articles) on this subject, but will only mention a couple:
The Poor Pay More by Caplovitz.? A dated book from the 60s, but what he writes is still very true and accurate today.? I've personally witnessed it numerous times in the last 20 years.
Blaming the Poor by Dr. Susan Greenbaum.? A recent publication, it explores the reality of poverty and how we got to where we are in this country today.
Funny thing is that most working poor don't realize that they ARE poor (until they get hit with something like a burned truck).? It's not shameful to be poor, what IS shameful is that the things that would lessen the problem are strenuously fought against.
Bob
On 5/7/19 4:58 AM, Wayne Leake wrote:
?Insurance on older vehicles costs more than the vehicle is worth, and usually has a high deductible.
?The truck is a 1983
?Had it since 2004.
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Re: Kit-Projects ND6T Ubitx AGC
On Tue, May 7, 2019 at 06:48 PM, Adrian Chadd wrote:
It's likely divided by four so the s curve entries can be bytes (1024/4 = 256), rather than 10 bit entries.
Makes sense. Thanks Chadd
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Locked
Re: bad news and a bit of good news.
... and particularly if the hobby they choose benefits the Nation (as Ham Radio does)!
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Re: Best location for an audio amp for a V4
I placed mine right at the output (wiper) of the volume control. I built mine from an LM380. I also placed a switchable 200 Hz wide CW filter between that point and my new audio amp. A throw of a toggle engages or disengages the new filter and a fixed resistor compensates for the gain difference so that it remains constant whether in or out. I opened R71 to save wasted energy. I am pleased with the results and cannot believe that I could improve upon it.
Your amplifier needs to have the output jacks isolated from ground since the output is bridged. Be very careful to do that. My only objection to it otherwise is the 10% distortion rating. Really? Is it actually that bad? Does it get into the rest of the radio, too? Might need some industrial-duty filtering. Let us know. The saved current drain and improved efficiency sure sounds tempting.
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Locked
Re: bad news and a bit of good news.
Thanks for proving my point, and exposing the sheer greed and
blind selfishness that has infected so much of this nation for
others to see.
We're just as deserving as you are.? Poor people have rights too
(NEVER forget that) - including the right to have a "hobby" if
they so choose.
On 5/7/19 12:34 PM, RICHARD wrote:
toggle quoted message
Show quoted text
Take this topic some were else.? If you are
so hard up, you do not need a hobby.? Sell all your radio gear
and support your family.? Been there done that.
K6KWQ
Dick
?
Sent from for Windows 10
?
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So, just to keep everything updated:
Today I played around a little bit more and inserted some serial.prints to check out which functions are
being calculated and where the program stops.
In the following screenshot you can see that the power measurement function seems to be working.
However I am not able to print the status of the progress variable, though I don't understand why.
It is defined as "2" at the beginning of the sketch and should therefore be? either a "2" or a "FAILED" I think.
There are some further declarations in the second page which define which number refers to which status.
It seems as if the variable does not get the new value?
(// Bool stuff
#define WORKING??? 0
#define DONE?????? 1
#define SUCCESS??? 1
#define FAIL?????? 2
#define NOPWR????? 3)
Sascha
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Re: Kit-Projects ND6T Ubitx AGC
It's likely divided by four so the s curve entries can be bytes (1024/4 = 256), rather than 10 bit entries.
-a
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Re: Kit-Projects ND6T Ubitx AGC
Tim, I can definitely see it respond on the oscope and the audio volume stays pretty consistent until about S9+40, maybe +50. I'll take? better look in the next day or two.
By density, do you mean some actual signal to modulate the carrier? I have a two-tone oscillator kit I haven't gotten around to building yet. I could put some test setup together with it, the KX-3 and some attenuators I don't yet have.? Qualitative measurements are nice, but I like real measurements better.
If the bias is controlling the gain then the board is doing it's job as intended. But as far as drive for the S-Meter the voltage I get is a bit low.? At S9 it is only 84 out of 1024 as measured by the raduino's ADC, not a lot of resolution then between S0 and S9 especially since the CEC firmware (for some reason) divides that by 4. I'll have to look at why Dr. Lee's doing that.
-- digger AB3XU
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Best location for an audio amp for a V4
I have a V4, and although it has enough output wattage for headphones, the volume pumped out of the speakers (even when running a 16ohm speaker) is a little wimpy.
So i bought the AdaFruit 2130 (?.? My first guess was to just put it just in front of the speaker and adjust its gain. Figured I didn't need to take a chance on blowing my ear drums out by putting it in front of the wiring that goes thru the headphones and then (if nothing plugged in) to the speaker.
Is there any better suggestions or experiences?
Mark
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Thanks for posting this.? I am looking forward to this one.? I'm not embarrassed to admit that I ordered whatever I didn't have already after you posted a preview picture somewhere.? This completes the mystery as I wasn't sure on the encoder and was holding off on that.? I am also happy for the confirmation that I guessed right on everything else.
I'm not guaranteeing these are the best prices (or the right parts for that matter) but following are links to some of what I ordered in case it helps anyone...
--
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Yes you will be surprised. Our builder group has meetings once a month. Maybe 10-12 may show up for a meeting.
When we hold a buildathon, everyone comes out of the woodwork. Our buildathon last weekend attracted 26 people that normally don't attend the meetings.
73
Ken VA3ABN
On Tue, May 7, 2019 at 3:57 PM Jack Purdum via Groups.Io <jjpurdum= [email protected]> wrote:
It really isn't when you compare it to commercial units (e.g., MFJ is $45, but does have a cheap hand key). QRP Guys has one for $20. Some kits sell for $12, but they don't have much in the way of features. My hope is that a club will build a few as "loaners" for members or to teach a class. (The audio is loud enough for a classroom.)? Al and I started the Greater Cincinnati Builders Group in hopes that we would get enough people to join that we might make use of some quantity discounts. To our surprise, we have 58 members drawing from 3 states...several from as far as Lexington! You might consider starting a group in your area. You might be surprised at how many people enjoy building stuff.
Jack, W8TEE
On Tuesday, May 7, 2019, 2:42:02 PM EDT, Matthew Pitts via Groups.Io <daywalker_blade_2004= [email protected]> wrote:
Jack, To be honest, that's not a bad price to start with. Matthew N8OHU On May 7, 2019 1:59:39 PM EDT, "Jack Purdum via Groups.Io" <jjpurdum= [email protected]> wrote: >All: >A number of you wanted a BOM for the Morse Code Tutor so that you can >order parts now before the schematic and source code are available. >This gives you an idea of the parts in the project: > >The attached BOM prices this out at around $19 not including a case. >You can lower the price by buying in small quantities and sharing in a >build. >Jack, W8TEE > > > -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
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It really isn't when you compare it to commercial units (e.g., MFJ is $45, but does have a cheap hand key). QRP Guys has one for $20. Some kits sell for $12, but they don't have much in the way of features. My hope is that a club will build a few as "loaners" for members or to teach a class. (The audio is loud enough for a classroom.)? Al and I started the Greater Cincinnati Builders Group in hopes that we would get enough people to join that we might make use of some quantity discounts. To our surprise, we have 58 members drawing from 3 states...several from as far as Lexington! You might consider starting a group in your area. You might be surprised at how many people enjoy building stuff.
Jack, W8TEE
On Tuesday, May 7, 2019, 2:42:02 PM EDT, Matthew Pitts via Groups.Io <daywalker_blade_2004@...> wrote:
Jack, To be honest, that's not a bad price to start with. Matthew N8OHU
On May 7, 2019 1:59:39 PM EDT, "Jack Purdum via Groups.Io" <jjpurdum= [email protected]> wrote: >All: >A number of you wanted a BOM for the Morse Code Tutor so that you can >order parts now before the schematic and source code are available. >This gives you an idea of the parts in the project: > >The attached BOM prices this out at around $19 not including a case. >You can lower the price by buying in small quantities and sharing in a >build. >Jack, W8TEE > > > -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
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Nothing is really critical, other than I'm expecting to see about 9-12V coming into the system. I used the buck converter as it is a little more efficient than a 7805 regulator and I do want someone to be able to power it from a car's 12V power outlet (i.e., the old cigarette lighter).
Jack
On Tuesday, May 7, 2019, 2:44:04 PM EDT, Dennis <dennis@...> wrote:
Hi Jack,
I noticed on eBay when looking at the audio amp that there are available ones with built in volume control. Might make things simpler and save on freight for one pot.
73
Dennis, W7DRW
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Re: Low power output on ubitx
Ok thank for the fast answer, i would make the things you say and then i post in thd next hours again, for the first time i say very much thanks,?
Greetz DD1FK
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Hi Jack,
I noticed on eBay when looking at the audio amp that there are available ones with built in volume control. Might make things simpler and save on freight for one pot.
73
Dennis, W7DRW
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Jack,
To be honest, that's not a bad price to start with.
Matthew N8OHU
toggle quoted message
Show quoted text
On May 7, 2019 1:59:39 PM EDT, "Jack Purdum via Groups.Io" <jjpurdum@...> wrote: All:
A number of you wanted a BOM for the Morse Code Tutor so that you can
order parts now before the schematic and source code are available.
This gives you an idea of the parts in the project:
The attached BOM prices this out at around $19 not including a case.
You can lower the price by buying in small quantities and sharing in a
build.
Jack, W8TEE
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
|
All:
A number of you wanted a BOM for the Morse Code Tutor so that you can order parts now before the schematic and source code are available. This gives you an idea of the parts in the project:
The attached BOM prices this out at around $19 not including a case. You can lower the price by buying in small quantities and sharing in a build.
Jack, W8TEE
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I have a uBITX? v3 2017? 908/02 for sale.? Audio IC is in socket. No modifications or software updates.?
I do not have time continue with the uBITX mods and updates.? It is in good working order and just quick
wired to the main board.? No case.? Tested on both CW and SSB.? I have adjusted the BFO frequency for
good audio on receive and transmit.??I made contacts on 80m CW, 40m CW & SSB, and 30 m CW.
13.8 volt power supply????????????????????????
????mHz???????????????????????????????????????????????????????? Power output in watts
?? 3.535??????????????????????????????????????????????????????????????? 11.0
?? 7.030????????????????????????????????????????????????????????????????10.0
?10.115???????????????????????????????????????????????????????????????? 6.0
?14.030???????????????????????????????????????????????????????????????? 6.0
?18.075???????????????????????????????????????????????????????????????? 3.0
?21.030???????????????????????????????????????????????????????????????? 2.0
?24.900???????????????????????????????????????????????????????????????? 2.4????
?28.030???????????????????????????????????????????????????????????????? 1.8
I am asking $90 including shipping within the CONUS.??Only postal money order or bank check.
My email and address info is current on?my QRZ.com page.? Thank you.
73, Rod WA9GQT???????
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Re: Low power output on ubitx
Are you using electret mic as the mic pin is having dc bias voltage? Generally we provide a 1nF? cap across the electret. That filters rf induced on the mic cable.
Reg ver 3 drawing 650mA on Rx with volume control at minimum, please check whether the audio amp is landing into oscillation. You could place a 1nF at? Vol mid pin close to the tda2822 and gnd. If the chip is too hot oscillation could be suspected.? Once the Rx? current comes down to expected standard, you can adjust the mos fet currents one? by one after making the gate bias as zero at first stage.
Perhaps you might have already exercised all above steps.
? He k once whether the bias regulator output is dropping down not allowing needed Id? for the IRF510s.
Hope to see you solving out the issues. Regards? sarma? ?u3zmv
I have V3 and i have an idea to rise up the output with an mic amplifier but i want look for an simple homebrew mic amp, but i think the problem is the voltage on mic cable for the amp, i read here in the forum of an simple 2N3906 amp directly after the mic capsuale and without any voltage from battery, only the voltage on the mic line should work, but i have built this and my first usage of it have no output, anything wrong in the circuit i solder or it is the voltage on the mic line that is not enoug.. but i think an mic amp is the first what i need..
My power output with cw is more than ssb on 80m i habe test, on other band i dont have testing cw against ssb power output. But it look like anything is wrong..
How can this less power output have any reason, which reasons there to look when receive is 160mA and ptt only 450mA and with adjust the rv2 and rv3 to each 100mA to the 450mA so i have made, the ubitx have 650mA pttonly by 12V and with say Haaaallloooo it have 1A but only 4-5W on Dummy on 80m and on Dipole 80m it have onmy 4W too..?
There is the mic amp i look for the next step to rise up power in ssb mode.. but the mic amp should be self made because i have not much money for buy an mic amp module in online shop, and i have many items at home like Transistor,R,C,L,ICs and many messuaring Tools so it should be an ubitx mic amp for homebrew and the circuit i only found of this kind doesnt work..
If any Ideas for an mic amp shematic for the ubitx 3 or any help to me to become more power i would be proud!
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digger AB3XU
Don, ND6T
sdr freak