Date   
Re: New for pi-day, the Rasberry Pi 3 B+

ajparent1/KB1GMX
 

For performance the Asus Tinkerboard has it seriously beat.  Not only faster 1800mhz but twice the ram 2gb.
All the sam IO and hardware still there and same form factor so it fits in the same places.

I know this as I have both RPI 3B and Tinkerboards.  

The problem is faster currently means more power needed.  

Allison

Re: Watch out forGROUP.IO STOPPING emails

Robert Alexander
 

That has happened to me also.

 

Robert (N5RHA)

 

 

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of Ronald Pfeiffer via Groups.Io
Sent: Thursday, March 15, 2018 10:05 AM
To: BITX20@groups.io
Subject: [BITX20] Watch out forGROUP.IO STOPPING emsils

 

Less than 8 hours in New England with no internet access and Group.io

stops sending you emails! 

 

Was not aware it happened but after a while I figured since I was no longer

getting BIT20 emails I went to the website.  Clicked on the "UNBOUNCE"

and started getting emails again.  But the later they stopped.  I just went to the

webpage to find out again I was "BOUNCED".  I "UNBOUNCED" again.

 

Will see how long I stay "UNBOUNCED"!

 

rOn

Re: RD transistors, unobtanium?

ajparent1/KB1GMX
 

RD series are still available.  Local suppliers may be the issue but here in USA its widely
available.  They work ok for 12V only designs.

Regarding IRF530, it can be used and does work at 30mhz but impedance matching
is harder due to the high input capacitance compared to the IRF510.   I have driven a
IRF530 at 6M, nice 35w output at 28V but the input matching was 6M only.  Like most
of the 100V mosfets they work much better with higher applied voltages on the drain. 


Allison

Re: Raduino oscilators. 33mhz and 57mhz. Documentation says one thinng, but this is what I measured.

Michael Shreeve
 

This BFO calculate code may be all that is needed but do isn't it possible that Ashhar also may use a master clock calibration routine when he aligns uBITX raduinos in the factory ? 

Re: RD transistors, unobtanium?

Vince Vielhaber
 

I seem to recall the IRF-520 being the closest IRF sub for the IRF-510. Never tried it tho. Last time I ordered 510s I also ordered 520s just in case.

Vince.

On 03/15/2018 12:25 PM, ajparent1 wrote:
RD series are still available. Local suppliers may be the issue but
here in USA its widely
available. They work ok for 12V only designs.

Regarding IRF530, it can be used and does work at 30mhz but impedance
matching
is harder due to the high input capacitance compared to the IRF510. I
have driven a
IRF530 at 6M, nice 35w output at 28V but the input matching was 6M
only. Like most
of the 100V mosfets they work much better with higher applied voltages
on the drain.


Allison

Re: Officially done with my uBITX!

 

Michael,

The pics should tell the whole story, oh, and there was a file involved.

Joel
N6ALT

Re: Raduino oscilators. 33mhz and 57mhz. Documentation says one thinng, but this is what I measured.

Don, ND6T
 

My Raduino reference was not when it arrived, and my BFO certainly was not (for my ears, at least). It worked OK but I enjoy being able to tune in any of the WWV stations at their correct frequency and be able to listen on either sideband without adjustment. It also reinforced my understanding of how it works. As I have said before, works for me. Your experience may differ. Looking forward to our next uBITX to uBITX QSO, by the way! -Don

Re: RD transistors, unobtanium?

Ashhar Farhan
 

The RD16 is no longer manufactured. The RD15 is no longer recommended for new designs. We have seen how things panned out for the TDA2822. I would vote to avoid devices that will soon be out of stock. There are the RD06 devices though that are available.and will continue to be available for a while.
The strongest reason to switch away from the IRF series was their declining gain. The IRF510 second sources are still being manufactured. 

On 15 Mar 2018 10:00 pm, "Vince Vielhaber" <vev@...> wrote:
I seem to recall the IRF-520 being the closest IRF sub for the IRF-510. Never tried it tho.  Last time I ordered 510s I also ordered 520s just in case.

Vince.



On 03/15/2018 12:25 PM, ajparent1 wrote:
RD series are still available.  Local suppliers may be the issue but
here in USA its widely
available.  They work ok for 12V only designs.

Regarding IRF530, it can be used and does work at 30mhz but impedance
matching
is harder due to the high input capacitance compared to the IRF510.   I
have driven a
IRF530 at 6M, nice 35w output at 28V but the input matching was 6M
only.  Like most
of the 100V mosfets they work much better with higher applied voltages
on the drain.


Allison


--
  Michigan VHF Corp.   http://www.nobucks.net/   http://www.CDupe.com/
                          http://www.metalworkingfun.com



Soldering gun or iron

Fr Richard R <rickocr2005@...>
 

I know this is a basic basic question, though it has been a long time since I have done kits or even soldering of this type.  My uBix is arriving today, hopefully!
So which soldering gun or iron should I purchase......?  Please forgive for such a noob question.

Fr Richard
WB8YXF


Re: New for pi-day, the Rasberry Pi 3 B+

Jerry Gaffke
 

The 8 bit Atmel processors are 20 or 30 years out of date, but a big community of users to get help from.
The $2 Blue Pill ARM STM32F103's seems the current best bang/buck.
But something small and stupid is a very good place to start if you really want to know what a computer is.
As I mentioned in my previous post, the  AVR Core section of the ATMega640 datasheet is about 6 pages long.
Figuring out an ARM would be somewhat more difficult. 

The Asus Tinkerboard could be interesting to folks here as an alternative to the RPi's for standalone digital.
Though most of my projects don't need that much processing power.
And many are just fine with an 8 bit ATMega.

The RPi-zero might be a good choice for a standalone rig with digital modes.
A brief google search suggests it can be throttled back to well under 100ma,
making it less than the uBitx receiver and thus perhaps good enough.
    https://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-zero-power
That supply current will rise considerably when you give it a job doing FFT's.
Far less processing power than a Tinkerboard, but less battery power too.
Oh, and $5.

Good time to be a geek.
I remember back in the late 70's, trying to build a Z80 system from scratch.
Never got completed.
Minimalist kits were $1k+ in 1978 dollars, and considerably less powerful than these ATMega's.

Jerry, KE7ER


On Thu, Mar 15, 2018 at 09:07 am, ajparent1 wrote:
For performance the Asus Tinkerboard has it seriously beat.  Not only faster 1800mhz but twice the ram 2gb.
All the sam IO and hardware still there and same form factor so it fits in the same places.

I know this as I have both RPI 3B and Tinkerboards.  

The problem is faster currently means more power needed.  

Allison

Re: Officially done with my uBITX!

 

Hi Denis,

Yes a Bitx40 would fit with room to spare, in fact I've used much smaller cases for my Bitx40 and my Bitx60.

Joel
N6ALT

Re: Raduino oscilators. 33mhz and 57mhz. Documentation says one thinng, but this is what I measured.

Jerry Gaffke
 

I understood "trivial" to mean "easy" in that context without a second thought.
Not so sure what "us" means though.


On Thu, Mar 15, 2018 at 09:02 am, Michael Shreeve wrote:
I would have to think he is using the incorrect word. By "trivial" perhaps he means "easy" ? Trivial , to us, would mean unimportant. Not sure how easy it would be to do this, but I'm thinking this is what he meant.

Re: Officially done with my uBITX!

Joe Puma
 

I used to install car stereos and alarms in the 80’s. Give me a dermal or a small jig saw, some plastic and a FILE and I can make the straitest bezel opening for your bezibox you would swear it was machine cut. 

Good job Joel
 



On Mar 15, 2018, at 1:00 PM, Joel Caulkins <caulktel@...> wrote:

Michael,

The pics should tell the whole story, oh, and there was a file involved.

Joel
N6ALT<IMG_3142.JPG><IMG_3141.JPG>

Re: RD transistors, unobtanium?

Henning Weddig
 

Accorfding to the internet site

http://www.mitsubishielectric.com/semiconductors/php/oSearch.php?FOLDER=/product/highfrequency/siliconrf/discrete

the RD16HFF1 and also other RD transistors are still manufactured, the latest data sheet is from July 2017

Henning Weddig
DK5LV

Am 15.03.2018 um 18:04 schrieb Ashhar Farhan:

The RD16 is no longer manufactured. The RD15 is no longer recommended for new designs. We have seen how things panned out for the TDA2822. I would vote to avoid devices that will soon be out of stock. There are the RD06 devices though that are available.and will continue to be available for a while.
The strongest reason to switch away from the IRF series was their declining gain. The IRF510 second sources are still being manufactured. 

On 15 Mar 2018 10:00 pm, "Vince Vielhaber" <vev@...> wrote:
I seem to recall the IRF-520 being the closest IRF sub for the IRF-510. Never tried it tho.  Last time I ordered 510s I also ordered 520s just in case.

Vince.



On 03/15/2018 12:25 PM, ajparent1 wrote:
RD series are still available.  Local suppliers may be the issue but
here in USA its widely
available.  They work ok for 12V only designs.

Regarding IRF530, it can be used and does work at 30mhz but impedance
matching
is harder due to the high input capacitance compared to the IRF510.   I
have driven a
IRF530 at 6M, nice 35w output at 28V but the input matching was 6M
only.  Like most
of the 100V mosfets they work much better with higher applied voltages
on the drain.


Allison


--
  Michigan VHF Corp.   http://www.nobucks.net/   http://www.CDupe.com/
                          http://www.metalworkingfun.com




UBitX Transmit Problem Fixed

Guy N7BIR <sgbridge@...>
 

Jerry,
Thanks so much for your expertise and guidance.  I ended up replacing Q90 and R84 on my uBitX. I’m now lighting up my  Elecraft SWR meter again!
We’re really blessed on this List to have guys like you and Jack and all the others who are really adept in hardware and software to offer your guidance and knowledge. Thanks again,

Guy N7BIR 

New file uploaded to BITX20@groups.io

BITX20@groups.io Notification <BITX20+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20@groups.io group.

File: ubitx_I2C4L_V3_00R.zip

Uploaded By: Jim Sheldon

Description:
W0EB/W2CTX latest firmware release for I2C equipped uBITX transceivers. Old file deleted and reposted with bug fixes. This version works on ANY I2C enabled Raduino card with an I2C 2 line x 16 character display if you follow the instructions and works especially well on our "RadI2Cino" card (available from W0EB - email via the email listed on QRZ please, not on the group forum for details on the RadI2Cino) This is the FOUR line display version with fully implemented CAT and interrupt driven CW - swappable paddle selection, Iambic A and B keyer modes. Completely rewritten alignment mode that has proven to be quite accurate as well.

You can access this file at the URL:
https://groups.io/g/BITX20/files/ubitx_I2C4L_V3_00R.zip

Cheers,
The Groups.io Team

New file uploaded to BITX20@groups.io

BITX20@groups.io Notification <BITX20+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20@groups.io group.

File: ubitx_I2C2L_V3_00R.zip

Uploaded By: Jim Sheldon

Description:
W0EB/W2CTX latest firmware release for I2C equipped uBITX transceivers. Old file deleted and reposted with bug fixes. This version works on ANY I2C enabled Raduino card with an I2C 2 line x 16 character display if you follow the instructions and works especially well on our "RadI2Cino" card (available from W0EB - email via the email listed on QRZ please, not on the group forum for details on the RadI2Cino) This is the TWO line display version with fully implemented CAT and interrupt driven CW - swappable paddle selection, Iambic A and B keyer modes. Completely rewritten alignment mode that has proven to be quite accurate as well.

You can access this file at the URL:
https://groups.io/g/BITX20/files/ubitx_I2C2L_V3_00R.zip

Cheers,
The Groups.io Team

Re: UBitX Transmit Problem Fixed

Joe Puma
 

Jerry is a godsend, I’m convinced. 😇



On Mar 15, 2018, at 1:31 PM, Guy N7BIR <sgbridge@...> wrote:

Jerry,
Thanks so much for your expertise and guidance.  I ended up replacing Q90 and R84 on my uBitX. I’m now lighting up my  Elecraft SWR meter again!
We’re really blessed on this List to have guys like you and Jack and all the others who are really adept in hardware and software to offer your guidance and knowledge. Thanks again,

Guy N7BIR 

Re: Soldering gun or iron

Doug W
 

Kind of like asking what car you should buy or shovel or rifle or whatever.  We can be much more helpful if you know your goals.  Are you on a limited budget and this is the only thing you plan to ever build and need the cheapest way to just get this done or do you have so much spare cash you light Cuban cigars with $100 bills and want the best tools that will last for generations?
Personally my go to iron is a supposedly 60w adjustable pencil type iron that I keep planning to upgrade but I like it and it gets the job done.  I have this one https://www.amazon.com/gp/product/B00Y9UW2XA  that was around $15.  It isn't available anymore but there are tons of similar Chinese ones on Amazon.  While you're at it I would suggest picking up one of the copper scrubby looking tip cleaners.

Re: Encoder details from various suppliers

Michael Shreeve
 

Humm, cool, one detail I hadn't looked at. Narrows the choices a little more. And also is one more detail the Chinese don't offer.

On Wed, Mar 14, 2018 at 5:24 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
Of all of those links, only the last one is any good. All of the others do not have a threaded shaft, which most people will want. I've probably purchased 50 KY-40 encoders and all have worked well. I haven't used them all, so there may be a bad one lurking in the pile, but so far, so good. These do have a detent, but another post here showed how to make it "detentless". Personally I like the detent as it stops on a dime and there is no coasting.

Jack, W8TEE



From: Michael Shreeve <shreevester@...>
To: BITX20@groups.io
Sent: Wednesday, March 14, 2018 8:14 PM
Subject: [BITX20] Encoder details from various suppliers

I've looked at encoders which I believe are used in the uBITX .  Perhaps you need one, they can be blown up with incorrect hookups, or physically just bad. Or perhaps your doing a special project and need one. 
Of course, the encoder supplied with a uBITX is kind of a special animal. 
It has the following specs. or close to it. There are a couple of important details, one the Number of Detent, and the Important spec is "without" and  , a few do not have switches and a few details like that. The link for a table showing these specs is here. http://www.alps.com/prod/info/E/HTML/Encoder/Incremental/EC11/EC11_list.html
And here is the encoder I believe to be almost exactly what we use in the Raduino . http://www.alps.com/prod/info/E/HTML/Encoder/Incremental/EC11/EC11E1534408.html
Now, if you try to get encoders, its really tough on ebay. Most of the details are left out. And, my experience with some listings is that if they give the details, it will be a very expensive item.  Here for example. 
https://www.ebay.com/itm/EC11E1534408-Encoder-incremental-Mounting-THT-15imp-revol-10mA-5VDC-ALPS/173093360266?epid=1539365104&hash=item284d2b128a:g:4-sAAOSw8W5aWJz2 From England,  GPB 8.99 $12.67 US Dollars for ONE ! 
Most of the ebay listings are like this one. Cheap, but no details.
https://www.ebay.com/itm/EC11E1534408-Encoder-incremental-Mounting-THT-15imp-revol-10mA-5VDC-ALPS/173093360266?epid=1539365104&hash=item284d2b128a:g:4-sAAOSw8W5aWJz2 And, you will be very disappointed because one of the most important details is the encoder is the "number of detents" which should say "without". Detents are the physical click you feel when you turn it, uBITX encoders are smooth, no detents, and Alps says "without" to describe this feature. Encoders with Detents are terrible for the uBITX.  And most likely the ones supplied by Ebay will have detents. 

 And Amazon doesn't give any details either. 
I am told these would be like the ones the uBITX uses. https://www.amazon.com/gp/product/B00KD42D0I/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1#customerReviews
But, I'm not sure how the person who referred this to me knew that. Definitely not from the listing. Was he just  lucky ? 







--
Michael Shreeve N6GRG