Date   
Re: Taa-Daa

Richard Spohn
 

Guess you won't listen to me but I am totally into through-hole, I do
not like SMD at all. -- Rich WB2GXM

On 11/29/19, Jack, W8TEE via Groups.Io <jjpurdum=yahoo.com@groups.io> wrote:
Mornin' Jim:
Al and I have talked about this at length and, given what we read over the
past 24 hours, I'm almost certain we will do SMD boards. I doubt we will do
two versions of the boards and I also doubt that we will release the Gerber
files. Al and I have invested 17 months and many 12 hour days working on the
book and we know that our expected hourly wage will be somewhere around
$0.50/hour. QRP Guys will be selling the boards at reasonable cost and it's
one way that we might get some revenue from people who don't pay for the
book. (My last two publishers agree that for every book I sell, 3 are ripped
off through torrent sites.)
For those who may not have seen it, if you haven't tried working with SMD
devices, I encourage you to spend $2 and buy a practice kit. This one is
eBay 172645304752


Our boards will use the 1206 sized SMD, which you can see their size in the
above photo. I also think this video: How to Solder SMD Components!

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How to Solder SMD Components!

In this video, I will show you how to solder SMD components using soldering
iron as well as using hot air. In la...
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 is very good in showing what SMD are and how to solder them. As to the
cost, a 2000 SMD resistor assortment with 50 values is less than $10. Caps
are a little more expensive, but $10 still buys 320 pieces with about 16
different values. Electronic Parts Online Store - Tayda Electronics sells
quantity 1 1206 resistors for $0.01 each and they are fairly fast


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Electronic Parts Online Store - Tayda Electronics


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in shipping products as they have a warehouse in CO.

So, it's going to be SMD's. We'll know more about the costs when we start to
get estimates on the boards, as their size will vary. We will also
investigate boards with the SMD parts in place, which will leave only
"large" pieces (e.g., IDC connectors, voltage regulators, etc.) left to do
on the boards. That's a little riskier, since we have no idea which products
will be the "most built". More on that much later.

Jack, W8TEE




On Friday, November 29, 2019, 1:50:11 AM EST, Jim Pruitt
<jpruitt67@...> wrote:

Hello Jack.

Are you taking a poll?  You might actually make a Groups.io poll asking
your question.  Yes,  I know, there will be lots of people that think they
are participating in the poll by posting their comment and why they chose
that particular thing but a poll would make it easier for you.

My vote is for smt pc boards but you might also consider making 2 versions,
one through hole and the other as smt.  I know that would be more work but
would appease both.  I am almost 71 years old and have no fear of smt (well,
some fear anyway as I currently have a project -RadioBerry that uses a
LFPGA144 Intel chip and a AD9866 QFN64 and no option to drag solder--and do
not like drag soldering).  I well know that many parts are no longer
available in through hole.  Many that are available are not stocked by
DigiMouse or have a 10,000 minimum order (OK, usually 1000 but that is still
more than most of us can afford--even if we had an outlet for the extra
999).  If we as a group start finding that projects are only available in
smt versions then it might force us as a whole to embrace or at least try
smt.  The other option would be to make the gerbers available (for the smt
version) and tell us we can submit out orders to JLCSteeedPCBWay and request
assembly (of the smt parts) and how to place that order since the smt parts
would not normally be included in a board order but these outfits do
assembly and preassembly...at a price.

I think if the various projects use SOCI8 chips that it would be easier for
us old farts to figure out that it aint that bad!  I would not layout a
board for the RadioBerry and its LFCSP144 (or whatever that 144 pin fpga is
called) on a 5/8" square then we would all run in terror!

In summary, I vote for smt if both are not an option.  Even if it is an
option I would still buy the smt version over the through hole because I
know how hard it is getting to find many through hole parts.

Thank you.

Jim Pruitt
WA7DUY


On 11/28/2019 1:41 PM, jjpurdum via Groups.Io wrote:


While they are editing the book, Al and I will be making PCB's for all but
the most trivial of the projects. One thing we go back and forth about is
whether to do the boards for through-hole or SMD parts. We both want to do
SMD, but we also know a lot of people are afraid of SMD's. My feeling: If,
at my age, I can work with SMD's, anyone can. Also, the cost is
significantly lower, too. On the other hand, a lot of hams won't even try to
use an SMD board. It's not going to be a major revenue source for us anyway,
so we're wondering what people actually want. Manufacturing an SMD board is
a little less expensive and, ceteris paribus, can be a little smaller. I
would be interested in hearing what the group thinks on the matter.
Jack, W8TEE

On Thursday, November 28, 2019, 2:03:37 PM EST, Gwen Patton
<@NG3P> wrote:

It all looks wonderful, Jack! I'm looking forward to a couple of those,
but mostly the luggable double-double. I want to build one, and mount it so
I can hoist it on a mast held by a drive-on mast mount in my van. That way,
I can operate from the van out in the field, from parks and such, and not
have to get out in the weather. I have lots of radios I can take (and
usually do), but I need to get or build a reasonable amp that can run off
power from the van easily and safely. Maybe a 50W. With the remote control,
that loop looks like exactly what I need, along with some of the wires I can
hang from the same mast (when I'm not using the loop, of course).
I repurposed an Acer Chromebook CB3-111 for field use. I replaced the
ChromeOS with GalliumOS, a distro of Linux based on Xubuntu. It works great,
and I just got JS8Call working on it this morning. I've got FLDigi and FLRig
installed, Qtel, a very well done Echolink client, and some various and
sundry other programs, like a flavor of NEC for antenna modeling (which I
still need to learn how to use), and a decent logger. I can tether it to my
phone via WiFi and get on the Internet, and access QRZ for lookups -- my
battery selection was such that I can also power the phone, and once I get a
cable built for it, the Chromebook as well. It'll streamline my field ops a
lot, reducing what I need to carry to do some serious operating!
I can't wait for that book to come out! It looks great, and you and Al
deserve some serious applause for it.
73, Gwen, NG3P
On Thu, Nov 28, 2019 at 1:44 PM jjpurdum via Groups.Io
<jjpurdum=yahoo.com@groups.io> wrote:

All:
Most of you are aware that Al (AC8GY) and I are working on a sequel to the
Projects book titled Microcontroller Projects for Amateur Radio. We changed
the title because we have not limited ourselves to the Arduino family of
processors, but include the STM32F1, ESP32, and the Teensy 4.0 controllers.
All can be (and, for the book, are) programmed in the Arduino IDE using C.
Today, Al and I finished writing the narrative for the last chapter of the
book.

We have signed with the ARRL to publish the book, and one reason for
signing with them is that they had enough faith to sign a contract with us,
but allow us to finish all of the projects before submitting the chapters.
That way, Al and I could work in the absence of a publisher breathing down
our necks. That's the good news. The bad news is that, despite us beating
our Jan 1, 2020, deadline, they are putting the new License manual ahead of
us in the production queue. (Boo !) I asked if it would be ready by FDIM and
they said no. That was a huge disappointment, but it is what it is. I'm
still hopeful it will be out before the end of the second quarter of next
year. Still, we feel like a 15 month stone has been lifted off our backs.

Anyway, what follows are some photos of most of the projects. I'll keep
everyone posted on publishing details when I know them.

Jack, W8TEE Al, AC8GY

two channel DSP (there's a preprocessor project, too)
Signal generator, up to 30MHz.

All kinds of test functions (i.e., different wave forms at various
voltages)

30W mini DL with watt meter (almost fits in a shirt pocket)

Old computer PS redesigned for powering the projects.

Morse Code Tutor (the subject of my FDIM presentation this year)

Antenna tuner with SWR display and scan function (very useful for trimming
antennas)

Our Mag loop with remote controller (tested to 100' and used in Field
Day).






--

-+-+-+-+-
Jenny Everywhere's Infinite: Quark Time
http://quarktime.net




Re: Taa-Daa

Richard Spohn
 

OH MY YES! I AM A FAN AND A BUYER! No sweat on the wait, Jack, gives
me time to save $$ for parts! Will you be including sources for the
enclosures and graphics that you used for these prototypes? THANK YOU
and HAPPY HOLLANDAISE! 73 - Rich WB2GXM

On 11/28/19, Jack, W8TEE via Groups.Io <jjpurdum=yahoo.com@groups.io> wrote:
All:
Most of you are aware that Al (AC8GY) and I are working on a sequel to the
Projects book titled Microcontroller Projects for Amateur Radio. We changed
the title because we have not limited ourselves to the Arduino family of
processors, but include the STM32F1, ESP32, and the Teensy 4.0 controllers.
All can be (and, for the book, are) programmed in the Arduino IDE using C.
Today, Al and I finished writing the narrative for the last chapter of the
book.

We have signed with the ARRL to publish the book, and one reason for signing
with them is that they had enough faith to sign a contract with us, but
allow us to finish all of the projects before submitting the chapters. That
way, Al and I could work in the absence of a publisher breathing down our
necks. That's the good news. The bad news is that, despite us beating our
Jan 1, 2020, deadline, they are putting the new License manual ahead of us
in the production queue. (Boo !) I asked if it would be ready by FDIM and
they said no. That was a huge disappointment, but it is what it is. I'm
still hopeful it will be out before the end of the second quarter of next
year. Still, we feel like a 15 month stone has been lifted off our backs.

Anyway, what follows are some photos of most of the projects. I'll keep
everyone posted on publishing details when I know them.

Jack, W8TEEAl, AC8GY

two channel DSP (there's a preprocessor project, too)
Signal generator, up to 30MHz.

All kinds of test functions (i.e., different wave forms at various
voltages)

30W mini DL with watt meter (almost fits in a shirt pocket)

Old computer PS redesigned for powering the projects.

Morse Code Tutor (the subject of my FDIM presentation this year)

Antenna tuner with SWR display and scan function (very useful for trimming
antennas)

Our Mag loop with remote controller (tested to 100' and used in Field Day).







Re: Book TOC

Bill Cromwell
 

I have the Arduino book and will watch for the new book.

73,

Bill KU8H

On 11/29/19 2:30 PM, Jack, W8TEE via Groups.Io wrote:
The book you found is the one I wrote about 5 years ago. Note that it's title is /*Arduino *Projects for Amateur Radio/. Because that book did fairly well, and there has been a real advance in some of the microcontrollers, we are not limiting ourselves to the Arduino family of microcontrollers this time. Instead, we are limiting it to those that can be programmed within the Arduino (free) IDE. Therefore, the new book is titled/*Microcontroller *Projects for Amateur Radio/. This time we have projects that use touch screen displays and the STM32F1, ESP32, and Teensy 4.0 microcontrollers. We do things in this book that simply were not possible in the first book simply because the resource depth and clock speed wasn't there.
Sorry for the confusion!
Jack, W8TEE
On Friday, November 29, 2019, 1:06:28 PM EST, Arv Evans <arvid.evans@...> wrote:
Jack
I am confused (my normal state!).  Your email says the book is not yet in publication but
It is already available in paperback and via Kindle.
https://www.amazon.com/Arduino-Projects-Amateur-Radio-Purdum/dp/0071834052
Arv
_._
On Fri, Nov 29, 2019 at 10:38 AM Jack, W8TEE via Groups.Io <jjpurdum=yahoo.com@groups.io <mailto:yahoo.com@groups.io>> wrote:
The book is not in print yet. In fact, it will be published by the
ARRL and they say it won't be done until the second quarter of 2020.
The title will be/Microcontroller Projects for Amateur Radio/.
Amazon will likely carry it, but we're encouraging people to support
the ARRL directly if possible.
Jack, W8TEE
On Friday, November 29, 2019, 12:24:15 PM EST, John Faivre
<@WA9SGD <mailto:@WA9SGD>> wrote:
What is the title of the new book? I looked on amazon and didn’t see
anything with those projects
--
thanks
John Faivre WA9SGD
--
Jack, W8TEE
--
Jack, W8TEE
--
bark less - wag more

Re: Book TOC

Jack, W8TEE
 

The book you found is the one I wrote about 5 years ago. Note that it's title is Arduino Projects for Amateur Radio. Because that book did fairly well, and there has been a real advance in some of the microcontrollers, we are not limiting ourselves to the Arduino family of microcontrollers this time. Instead, we are limiting it to those that can be programmed within the Arduino (free) IDE. Therefore, the new book is titled Microcontroller Projects for Amateur Radio. This time we have projects that use touch screen displays and the STM32F1, ESP32, and Teensy 4.0 microcontrollers. We do things in this book that simply were not possible in the first book simply because the resource depth and clock speed wasn't there.

Sorry for the confusion!

Jack, W8TEE

On Friday, November 29, 2019, 1:06:28 PM EST, Arv Evans <arvid.evans@...> wrote:


Jack

I am confused (my normal state!).  Your email says the book is not yet in publication but
It is already available in paperback and via Kindle.


Arv
_._


On Fri, Nov 29, 2019 at 10:38 AM Jack, W8TEE via Groups.Io <jjpurdum=yahoo.com@groups.io> wrote:
The book is not in print yet. In fact, it will be published by the ARRL and they say it won't be done until the second quarter of 2020. The title will be Microcontroller Projects for Amateur Radio. Amazon will likely carry it, but we're encouraging people to support the ARRL directly if possible.

Jack, W8TEE

On Friday, November 29, 2019, 12:24:15 PM EST, John Faivre <wa9sgd@...> wrote:


What is the title of the new book? I looked on amazon and didn’t see anything with those projects
--
thanks
John Faivre WA9SGD

--
Jack, W8TEE


--
Jack, W8TEE

Re: Adjusting pa bias (RV3) blows one of the final #ubitx

Harry Latterman
 

Why do you have the + VDC wire hooked to the negative power post???



On Friday, November 29, 2019, 11:00:08 AM MST, srivatsa KS <srivatsak.s@...> wrote:


Thanks for the suggestions guys. Much appreciated. I de-soldered RV3 and discovered 2 pins broken . Probable while adjusting the bias the pins below suddenly came in contact during last mile of the turn and bleu the finals. 



I had a Bourne 10k single turn lying around my shack which i used. I also replaced the blows IRF 510 today .


Rx only consumes 150ma. TX no modulation takes 350mA. Adjusted pa bias 100mA from each IRF510. So max consumption(no modulation) is 550-560ma . 
While speaking to mic there is no significant increase in current. Max 600-650mA. Output power measured on my swr meter is 2-3watt max with me shouting into the PTT on 40m . Is this normal?

Re: Book TOC

Arv Evans
 

Right.  I did a Google search for "Microcontroller Projects for Amateur Radio" and that is what the search returned.
_._


On Fri, Nov 29, 2019 at 11:24 AM N8DAH <Dherron@...> wrote:

Arv,

 That is his 1st book. He is talking about his next book in this post with the title "Microcontroller Projects for Amateur Radio"

73
--
David

 N8DAH
Kit-Projects.com

Shop is open!

CEC 5" Enhanced Nextion Files #images

Ron
 

Need help with the CEC Nextion Enhanced 5" file.
I downloaded both the HMI and TFT ready to go file and no matter whether I compile the file
In the Nextion editor or use an SD card to install the TFT card I get a 1" image on the display.

Am I the only one seeing this or am I doing something wrong.
It is a genuine Nextion Enhanced display.

Am I doing something wrong or have the files been messed with?
Thanks for any help.
W4DNQ

Re: Book TOC

 

Arv,

 That is his 1st book. He is talking about his next book in this post with the title "Microcontroller Projects for Amateur Radio"

73
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: Book TOC

Arv Evans
 

Jack

I am confused (my normal state!).  Your email says the book is not yet in publication but
It is already available in paperback and via Kindle.


Arv
_._


On Fri, Nov 29, 2019 at 10:38 AM Jack, W8TEE via Groups.Io <jjpurdum=yahoo.com@groups.io> wrote:
The book is not in print yet. In fact, it will be published by the ARRL and they say it won't be done until the second quarter of 2020. The title will be Microcontroller Projects for Amateur Radio. Amazon will likely carry it, but we're encouraging people to support the ARRL directly if possible.

Jack, W8TEE

On Friday, November 29, 2019, 12:24:15 PM EST, John Faivre <wa9sgd@...> wrote:


What is the title of the new book? I looked on amazon and didn’t see anything with those projects
--
thanks
John Faivre WA9SGD

--
Jack, W8TEE

Re: Taa-Daa

Jack, W8TEE
 

Thanks, Dennis...your comments are sincerely appreciated. We also know that there are some really bright people out there, both EE and software types, and we're hoping that they will get involved and improve/enhance the projects in the book. We see the book as a springboard for that kind of activity. Should be fun!

Jack, W8TEE

On Friday, November 29, 2019, 11:28:10 AM EST, Dennis Beverage <sodypop@...> wrote:


What an achievement you guys have done.  Personally, I think you are making about the most important contribution to QRP radio that has come along since Farhan’s Bitx development.  Essentially, you will be providing QRP amatures with a complete guide book for development of all the tools/equipment needed for QRP shack development projects.  Enough to keep us all busy for a good while.  And, maybe, ARRL will see this as an important recruitment tool for newbies who simply cannot afford today’s retail transceiver products.  ARRL has announced a whole new on-line magazine aimed primarily at new members.  

I will be purchasing your book and follow up products and encouraging others to do so as well to show our appreciation for the efforts of both of you.

Thanks for all you do for all of us.
--
Sodypop🤠
KJ6VGB


--
Jack, W8TEE

Re: Book TOC

Jack, W8TEE
 

The book is not in print yet. In fact, it will be published by the ARRL and they say it won't be done until the second quarter of 2020. The title will be Microcontroller Projects for Amateur Radio. Amazon will likely carry it, but we're encouraging people to support the ARRL directly if possible.

Jack, W8TEE

On Friday, November 29, 2019, 12:24:15 PM EST, John Faivre <wa9sgd@...> wrote:


What is the title of the new book? I looked on amazon and didn’t see anything with those projects
--
thanks
John Faivre WA9SGD

--
Jack, W8TEE

Re: #ubitx-help µBitx wiring - one stupid question #ubitx-help

Cory King
 

Those connectors act as a switch.  When the headphone jack is plugged in, it breaks a circuit and routes it to the cable instead of a terminal.  That way you can have a speaker that turns off when you plug in the headphones.


For what it’s worth, I dumped the jacks that came with the kit and got ones that have solder lugs on them.  Much easier to soldering. Use the data sheet on the site for wiring diagrams.

https://www.mouser.com/ProductDetail/kobiconn/mj-354w/?qs=vRcuMSi6Zy4UStENlEUnuA%3D%3D&countrycode=US&currencycode=USD

Re: Book TOC

John Faivre
 

What is the title of the new book? I looked on amazon and didn’t see anything with those projects
--
thanks
John Faivre WA9SGD

Re: Adjusting pa bias (RV3) blows one of the final #ubitx

srivatsa KS
 

Thanks for the suggestions guys. Much appreciated. I de-soldered RV3 and discovered 2 pins broken . Probable while adjusting the bias the pins below suddenly came in contact during last mile of the turn and bleu the finals. 



I had a Bourne 10k single turn lying around my shack which i used. I also replaced the blows IRF 510 today .


Rx only consumes 150ma. TX no modulation takes 350mA. Adjusted pa bias 100mA from each IRF510. So max consumption(no modulation) is 550-560ma . 
While speaking to mic there is no significant increase in current. Max 600-650mA. Output power measured on my swr meter is 2-3watt max with me shouting into the PTT on 40m . Is this normal?

Re: Taa-Daa

Dennis Beverage
 

What an achievement you guys have done.  Personally, I think you are making about the most important contribution to QRP radio that has come along since Farhan’s Bitx development.  Essentially, you will be providing QRP amatures with a complete guide book for development of all the tools/equipment needed for QRP shack development projects.  Enough to keep us all busy for a good while.  And, maybe, ARRL will see this as an important recruitment tool for newbies who simply cannot afford today’s retail transceiver products.  ARRL has announced a whole new on-line magazine aimed primarily at new members.  

I will be purchasing your book and follow up products and encouraging others to do so as well to show our appreciation for the efforts of both of you.

Thanks for all you do for all of us.
--
Sodypop🤠
KJ6VGB

Re: Adjusting pa bias (RV3) blows one of the final #ubitx

Jerry Gaffke
 

Any particular "car lamp"?
There's headlights, tail lights, brake lights, dash lights, turn signals, ...
There's incandescent, halogen, LED, ...

My guess is that you are thinking of something like an 1157 incandescent light.
    https://www.amazon.com/SYLVANIA-1157-Miniature-Contains-Bulbs/dp/B0031HAN92

This has two different filaments, try the thinner tail light filament first.
If the voltage drops too much at the required current then try the thick brake light filament.
Could get a little bit more ummph by running both filaments in parallel.

Seems an incandescent light is well suited to this sort of thing since the resistance goes up drastically when it's hot.
So it has little effect at low currents, but severely restricts high currents.
An 1157 plus jumper cables to a 12v source is a quick and easy current limited power supply.
Assuming you are happy with a rough current limit of something under 1 Amp.

I have never tried it.

Jerry, KE7ER



On Fri, Nov 29, 2019 at 07:21 AM, Lawrence Galea wrote:
Apart from the suggestions by our friends, best is to use a current limited supply so that if it goes above the setting it will protect the set or use a car lamp in series with the supply which will also provide some protection.
As suggested a multi-turn pot is better to adjust the bias.
Happy weekend
Lawrence

Re: Adjusting pa bias (RV3) blows one of the final #ubitx

Lawrence Galea
 

Apart from the suggestions by our friends, best is to use a current limited supply so that if it goes above the setting it will protect the set or use a car lamp in series with the supply which will also provide some protection.
As suggested a multi-turn pot is better to adjust the bias.
Happy weekend
Lawrence

On Fri, Nov 29, 2019 at 5:00 AM srivatsa KS <srivatsak.s@...> wrote:
Hi,

I'm trying to adjust pa bias on my ubitx v4 since 2days. Initial current consumption with both preset (RV3 and RV2) in clockwise position is 150mA. I turn bot preset fully clockwise.
I start with RV3 turning slowly anti-clockwise. Current with PTT on is 350ma to start with. As i start to turn the preset RV3. Some point of time current shoots up very fast and i stop.  By now the final is very hot.  At this point I don't have to press PTT,   current consumption in Recieve is 350ma. One of the Irf510(Q94) gets very hot in recieve itself. Most likely it's gone for toss. This the second time in frying it in past 2 days. Plese help!  Am i doing it the right way? I know the preset needs to be turned very slowly and I'm doubly sure I'm doing it extremely slow. Not sure what is wrong :( 

This doesn't happen with the other irf510 (Q95).  RV2 has is lesser gradient and can be easily turned easily to get a 100m amp more. 

Shouldn't RV3 have similar current gradient on Q94 as RV2 has on Q95 ?

Re: Adjusting pa bias (RV3) blows one of the final #ubitx

Jerry Gaffke
 

Raj is probably right about replacing the pot.

However, this is puzzling:
>  At this point I don't have to press PTT, current consumption in Recieve is 350ma.

I'd guess that you just blew Q94, and current will remain at 350 ma even after turning RV3 fully clockwise and/or turning power off and then back on.
If current during receive is 150ma initially, it should always be close to that when PTT is not pressed.

The TX power rail into pin 3 of U2 is 12v only when PTT is pressed for transmit, TX should be 0v when not pressed for receive.
So the gate (middle terminal) at Q94 should also be 0v during receive, and Q94 turned fully off (even though there is still 12v at Q94 drain).
If Q94 is conducting (and getting hot) when Q94 gate is 0v, then Q94 is blown and must be replaced.

There should be no current into the Q94 drain when RV3 is fully clockwise with PTT pressed.
That current increases at some point (around 3 or 4 volts at the gate of Q94) as you turn RV3.
If this is the case, then Q94 is probably ok.
.

Jerry, KE7ER

 

On Thu, Nov 28, 2019 at 11:03 PM, Raj vu2zap wrote:
If one of the bias adjust pot is slightly skewed then one of the leads below is cut
that is why you are not able to adjust bias. I recommend Bourn's multiturn preset
that is vertical for best results.

Raj

 

At 29/11/2019, you wrote:
Hi,

I'm trying to adjust pa bias on my ubitx v4 since 2days. Initial current consumption with both preset (RV3 and RV2) in clockwise position is 150mA. I turn bot preset fully clockwise.
I start with RV3 turning slowly anti-clockwise. Current with PTT on is 350ma to start with. As i start to turn the preset RV3. Some point of time current shoots up very fast and i stop. By now the final is very hot. At this point I don't have to press PTT, current consumption in Recieve is 350ma. One of the Irf510(Q94) gets very hot in recieve itself. Most likely it's gone for toss. This the second time in frying it in past 2 days. Plese help! Am i doing it the right way? I know the preset needs to be turned very slowly and I'm doubly sure I'm doing it extremely slow. Not sure what is wrong :(

This doesn't happen with the other irf510 (Q95). RV2 has is lesser gradient and can be easily turned easily to get a 100m amp more.

Shouldn't RV3 have similar current gradient on Q94 as RV2 has on Q95 ?

Re: Taa-Daa

Jack, W8TEE
 

Mornin' Jim:

Al and I have talked about this at length and, given what we read over the past 24 hours, I'm almost certain we will do SMD boards. I doubt we will do two versions of the boards and I also doubt that we will release the Gerber files. Al and I have invested 17 months and many 12 hour days working on the book and we know that our expected hourly wage will be somewhere around $0.50/hour. QRP Guys will be selling the boards at reasonable cost and it's one way that we might get some revenue from people who don't pay for the book. (My last two publishers agree that for every book I sell, 3 are ripped off through torrent sites.)

For those who may not have seen it, if you haven't tried working with SMD devices, I encourage you to spend $2 and buy a practice kit. This one is eBay 172645304752

Inline image

Our boards will use the 1206 sized SMD, which you can see their size in the above photo. I also think this video: How to Solder SMD Components!

 
is very good in showing what SMD are and how to solder them. As to the cost, a 2000 SMD resistor assortment with 50 values is less than $10. Caps are a little more expensive, but $10 still buys 320 pieces with about 16 different values. Electronic Parts Online Store - Tayda Electronics sells quantity 1 1206 resistors for $0.01 each and they are fairly fast


in shipping products as they have a warehouse in CO.

So, it's going to be SMD's. We'll know more about the costs when we start to get estimates on the boards, as their size will vary. We will also investigate boards with the SMD parts in place, which will leave only "large" pieces (e.g., IDC connectors, voltage regulators, etc.) left to do on the boards. That's a little riskier, since we have no idea which products will be the "most built". More on that much later.

Jack, W8TEE




On Friday, November 29, 2019, 1:50:11 AM EST, Jim Pruitt <jpruitt67@...> wrote:


Hello Jack.

Are you taking a poll?  You might actually make a Groups.io poll asking your question.  Yes,  I know, there will be lots of people that think they are participating in the poll by posting their comment and why they chose that particular thing but a poll would make it easier for you.

My vote is for smt pc boards but you might also consider making 2 versions, one through hole and the other as smt.  I know that would be more work but would appease both.  I am almost 71 years old and have no fear of smt (well, some fear anyway as I currently have a project -RadioBerry that uses a LFPGA144 Intel chip and a AD9866 QFN64 and no option to drag solder--and do not like drag soldering).  I well know that many parts are no longer available in through hole.  Many that are available are not stocked by DigiMouse or have a 10,000 minimum order (OK, usually 1000 but that is still more than most of us can afford--even if we had an outlet for the extra 999).  If we as a group start finding that projects are only available in smt versions then it might force us as a whole to embrace or at least try smt.  The other option would be to make the gerbers available (for the smt version) and tell us we can submit out orders to JLCSteeedPCBWay and request assembly (of the smt parts) and how to place that order since the smt parts would not normally be included in a board order but these outfits do assembly and preassembly...at a price.

I think if the various projects use SOCI8 chips that it would be easier for us old farts to figure out that it aint that bad!  I would not layout a board for the RadioBerry and its LFCSP144 (or whatever that 144 pin fpga is called) on a 5/8" square then we would all run in terror!

In summary, I vote for smt if both are not an option.  Even if it is an option I would still buy the smt version over the through hole because I know how hard it is getting to find many through hole parts.

Thank you.

Jim Pruitt
WA7DUY


On 11/28/2019 1:41 PM, jjpurdum via Groups.Io wrote:
While they are editing the book, Al and I will be making PCB's for all but the most trivial of the projects. One thing we go back and forth about is whether to do the boards for through-hole or SMD parts. We both want to do SMD, but we also know a lot of people are afraid of SMD's. My feeling: If, at my age, I can work with SMD's, anyone can. Also, the cost is significantly lower, too. On the other hand, a lot of hams won't even try to use an SMD board. It's not going to be a major revenue source for us anyway, so we're wondering what people actually want. Manufacturing an SMD board is a little less expensive and, ceteris paribus, can be a little smaller. I would be interested in hearing what the group thinks on the matter.

Jack, W8TEE

On Thursday, November 28, 2019, 2:03:37 PM EST, Gwen Patton <ardrhi@...> wrote:


It all looks wonderful, Jack! I'm looking forward to a couple of those, but mostly the luggable double-double. I want to build one, and mount it so I can hoist it on a mast held by a drive-on mast mount in my van. That way, I can operate from the van out in the field, from parks and such, and not have to get out in the weather. I have lots of radios I can take (and usually do), but I need to get or build a reasonable amp that can run off power from the van easily and safely. Maybe a 50W. With the remote control, that loop looks like exactly what I need, along with some of the wires I can hang from the same mast (when I'm not using the loop, of course).

I repurposed an Acer Chromebook CB3-111 for field use. I replaced the ChromeOS with GalliumOS, a distro of Linux based on Xubuntu. It works great, and I just got JS8Call working on it this morning. I've got FLDigi and FLRig installed, Qtel, a very well done Echolink client, and some various and sundry other programs, like a flavor of NEC for antenna modeling (which I still need to learn how to use), and a decent logger. I can tether it to my phone via WiFi and get on the Internet, and access QRZ for lookups -- my battery selection was such that I can also power the phone, and once I get a cable built for it, the Chromebook as well. It'll streamline my field ops a lot, reducing what I need to carry to do some serious operating!

I can't wait for that book to come out! It looks great, and you and Al deserve some serious applause for it.

73,
Gwen, NG3P

On Thu, Nov 28, 2019 at 1:44 PM jjpurdum via Groups.Io <jjpurdum=yahoo.com@groups.io> wrote:
All:

Most of you are aware that Al (AC8GY) and I are working on a sequel to the Projects book titled Microcontroller Projects for Amateur Radio. We changed the title because we have not limited ourselves to the Arduino family of processors, but include the STM32F1, ESP32, and the Teensy 4.0 controllers. All can be (and, for the book, are) programmed in the Arduino IDE using C. Today, Al and I finished writing the narrative for the last chapter of the book.

We have signed with the ARRL to publish the book, and one reason for signing with them is that they had enough faith to sign a contract with us, but allow us to finish all of the projects before submitting the chapters. That way, Al and I could work in the absence of a publisher breathing down our necks. That's the good news. The bad news is that, despite us beating our Jan 1, 2020, deadline, they are putting the new License manual ahead of us in the production queue. (Boo !) I asked if it would be ready by FDIM and they said no. That was a huge disappointment, but it is what it is. I'm still hopeful it will be out before the end of the second quarter of next year. Still, we feel like a 15 month stone has been lifted off our backs.

Anyway, what follows are some photos of most of the projects. I'll keep everyone posted on publishing details when I know them.

Jack, W8TEE
Al, AC8GY

two channel DSP (there's a preprocessor project, too)
Inline                                                           image
Signal generator, up to 30MHz.
Inline                                                           image

All kinds of test functions (i.e., different wave forms at various voltages)
Inline                                                           image

30W mini DL with watt meter (almost fits in a shirt pocket)
Inline                                                           image
Old computer PS redesigned for powering the projects.
Inline                                                           image
Morse Code Tutor (the subject of my FDIM presentation this year)
Inline                                                           image
Antenna tuner with SWR display and scan function (very useful for trimming antennas)
Inline                                                           image
Our Mag loop with remote controller (tested to 100' and used in Field Day).

Inline                                                           image




--

-+-+-+-+-
Jenny Everywhere's Infinite: Quark Time
http://quarktime.net


--
Jack, W8TEE

Re: Receive noise in just built version 5

Ian Reeve
 

The pay will almost certainly be a switch mode,server pay are normally quiet and I suggest making sure the bfo etc is correctly aligned.


From: BITX20@groups.io <BITX20@groups.io> on behalf of Morris Ford <morrishford@...>
Sent: Friday, November 29, 2019 12:51:03 PM
To: BITX20@groups.io <BITX20@groups.io>
Subject: Re: [BITX20] Receive noise in just built version 5
 
Thanks for your response. I really don't know about the power supply being a switcher. It is a supply salvaged from a HP server. I'll check on what type it is. I think I will connect the radio to a battery to see if any background noise goes away.

Morris
K7LSV


On Thu, Nov 28, 2019 at 11:47 AM Alberto via Groups.Io <albertopetruccelli=yahoo.com.ar@groups.io> wrote:
Do you have switching power supply ???

Rgds


El jue., 28 de nov. de 2019 a la(s) 12:16, howard winwood G4GPF
<winwoodh@...> escribió:
Do the BFO tune, you will find the difference amazing.