Date   
Re: Got my Excellway case from China today.

Marcu
 

On 1 May 2018 at 12:56, walt hodges <walt.r.hodges@...> wrote:
I must be having a senior moment, but I can't locate on ebay.  help please.

On Mon, Apr 30, 2018 at 9:48 PM, Bo Barry <wn4ghv@...> wrote:
Sorry, they were on eBay.



Re: Nano Capability with 2.8" TFT Displays

Jerry Gaffke
 

Sounds interesting, $8 is a great price.
I assume it's something like this, 320x240 of RGB dots, qvga:  
    https://www.buydisplay.com/default/serial-spi-2-8-tft-lcd-module-display-320x240-optional-touch-screen

Will definitely require a special connector, I hope they are less than $8.
Down that webpage some under interfaces, they have several flavors of "8080 parallel interface".
Which sounds fun and retro, but I think I'll stick with SPI.

Could do plots and store a few fonts from the Nano, but that would be very limiting.
I'd simply spec a new processor, something between a $2 Blue Pill and a RasberryPi.
Better yet, let the builder choose the processor, run everything off of spi and i2c buses to minimize wires.
Forget 5v, most of the rest of the world did long ago.
If you do make a reasonably powerful processor possible, there are folks here that will use it.

A few possible projects we've already seen mentioned in the forum:
    panadapter, usable as a very low end spectrum analyzer
    sweeperino like device to plot filters
    A basic 100khz bw scope, with RF mixer so can see transmitted signal
    vector impedance analyzer  ;-)

If the processor has the muscle to support digital modes,
a display like that makes it possible to run stand-alone.

Jerry, KE7ER


On Mon, Apr 30, 2018 at 07:31 pm, Kees T wrote:
The subjects are too difficult to sort so I'll start another thread. 

There are really nice serial interface 2.8" TFTs with touchscreens out there for pretty low prices ($8-$9). I would like to know just what you can do with an existing Nano or a Protoneer (much faster and way more storage). Seems like we have enough pins coming off the existing controller to support an SPI (4 pins). May need a small board between the existing Raduino  and the TFT (level shifters, etc). What functions could you support with firmware ? In other words what capabilities could be added if you don't worry about DSP, FFTs, etc. and other microcontroller intensive stuff. 

Keep it simple and minimal..... starting with the existing uBITX and a 2.8" TFT with a SPI interface. What would you suggest ?

73 Kees K5BCQ

Re: VK2AUJ's µBITX project

John Sharpe
 

Nice project Yves, welcome to the Bitx world.

I now have a Bitx40 and a uBitx. A lot of the fun is reading all the mods and ideas posted on this group and trying them out.

73s, john VK2VOL



On 1 May 2018, at 12:55 pm, Yves vk2auj <yves.bernier@...> wrote:

Just had to build one of these www.hfsignals.com/index.php/ubitx/.. I used to have a KX3, but what I really wanted was a lunch box radio I could just leave on the ground outside.
The Manly Warringah Radio Society (MWRS) is the radio club I belong to in Sydney Australia!

Yves vk2auj

Re: Got my Excellway case from China today.

Doug W
 

holy cow.  if that quality sells for that much I really need to free up some time.

Re: BITX20 at Dayton Hamvention?

Hans Summers
 

Hi Jack, all

> Hans and Ashhar will both be at the FDIM conference just 
> before the Hamvention starts, in Fairborn, OH. I'm fairly certain 
> there will also be a fair number of µBITX users at that 
> conference, too.

QRP Labs has a table at vendor evening at FDIM (Thursday 17-May-2018) and also a booth at the Dayton hamvention, #6414. I hope to have a good selection of QRP Labs kits on show and for sale. 

73 Hans G0UPL

Re: U1 fried

Tom, wb6b
 

I concur with the resistor suggestion. Here is how I wired my speaker jack.

The lowest value resistors I had was 15 ohms, so I used that. Going lower may be better. Also, I used two resistors so if a monaural plug is plugged into the jack it will not short out the sound.



Tom, wb6b

Re: Antenna

Tom, wb6b
 

Hi,

I want to get on 80M for a local net and don't have the room for a half wave. I found this antenna -- a non-resonate end fed -- that can work with a 71ft wire. Bought the 9:1 transformer kit as I don't need the power handling of the assembled antenna matching transformer. Time will tell if this works out to be a good antenna.

This antenna may still require an antenna matching unit at the transmitter, as it was designed with the assumption that many transceivers have a matching unit built in. 

Tom, wb6b

http://palomar-engineers.com/antenna-products/baluns-and-ununs/1-8-30-mhz-balunsununs/hf-high-power-balunsununs/hf-91-transformers/450-50-ohm-9-1-Balun-or-Unun-Core-Kit-1-8-30-MHz-250-watts-PEP-end-fed-antenna-p75163123

http://palomar-engineers.com/ferrite-application-experts-2/Antenna-Products-c21444163#!/Bullet-End-Fed-500-Watt-Antenna-Complete-1-8-61-MHz-Choose-55-203-feet/p/74356626/category=25706168


Re: Got my Excellway case from China today.

Gary Anderson
 

I bet some find it hard to stomach buying $27 plastic panels for a $10 plastic case when debating a few bucks differences in micro-controllers.
That said, my building brother, I too get anxious on cutting holes.  We don't know what tools you have, and given the question, assume not a mill or a drill press.
What I would do is cover the front side of the plastic panel with blue 3M painters tape. Scribe the centerline for the holes directly on the 'inside the box' portion of the plastic where it won’t be seen. I use center drills to start the holes (they are cheap), if you don't have center drills, use a small drill bit.  Once the initial undersized holes are cut, flip the piece over and drill from the 'outside the box' side so if you get a chip out it won't be seen. Best to start small and step up to one drill bit less than size. When drilling, secure the plastic panel over a scrap piece of softwood, and make this a "pine board project."  With thin plastic and drilling with hand tools, I find that the final drill bit size is best done by hand. I have an old pcb hand nibbler tool ($10?)  for cutting somewhat square holes with patience.    Just slightly undercut the rectangle for the LCD with the nibbler, remove the tape and finish out with a bastard file and sand paper.  If all goes wrong, you can still try 2 more cases or spend the $27.  Also search this forum for good ideas on printing a full face 'label' which might cover up the sins of a nonperfect cut. Stain grade or paint grade? My wood working Grandfather taught me very early in life that a coat of paint covers a multitude of sins. Nothing ventured, nothing learned. Maybe someone else has some tips.

Re: ND6T AGC implementation for uBIT-X

marjannorm
 

Hi,
can you please put me down for two each?   Many thanks
Norm Lee. Vk5gi
28/170 Main Road
McLaren Vale.     SA.       5171
Australia

Re: ND6T AGC implementation for uBIT-X

f1apy - Jacques
 

Hello Kees,

Are you planned to ship outside US ?

if yes, please 1 pcb of each for me.

vy’ 73s de Jacques – F1APY

 

Re: Antenna

Nigel G4ZAL
 

My 66ft EFHW is resonant on 40 thro' 10 including 30m (SWR is just above 1.5:1 on 30m) it is strung up with a dogleg around mid length. 
What appeals to me is that it is simply fed at one end and only has a single 2metre counterpoise.
I found it best with the feedpoint elevated above ground (1.5 metres in my case).

I estimate it is a few db down when compared to a dipole and seems to be borne out in real life when observing signal reports on FT8 - it is a compromise antenna after all.

All in all, it's decent performer with minimal visual impact (essential according to SWMBO (She Who Must Be Obeyed)) !

I plan to extend it to 80m with a loading coil as per some of the linked designs in the above posts. 

Nigel

Re: Got my Excellway case from China today.

Giancarlo
 

Hi all,

I believe it is an expensive solution and if you do include the handling and shipping charges it cost as a metal professional box, plus there is no screening being all plastic.

A not too expensive solution could be to use laminated PCB material, with pieces soldere together. As an example you can see some picture of the complex and superperforming transceiver Pic-A-Star designed by Peter, G3XJP.  http://www.g3vpx.net/picastar/picastartphotos.htm.

73

Gian
I7SWX

Re: Got my Excellway case from China today.

Vic WA4THR
 

Good tips on working with the plastic case. Another is to use a small rotary disk cutter like a Dremel and I have a Dremel-clone that I picked up at a yard sale for $5 that works great. I was able to cut against a full-size printing of the panel layout that I taped to the back. Still, I cut the large square holes slightly undersized and used a flat file to trim them up. The result was I could make a nice friction-fit for the LCD display without needing extra hardware or bezels. Regular drill bits adjusted larger with a round rat-tail file worked for controls and connectors. I found the Baggood case very easy to work with compared to the metal cases I used years ago, but watch that you don't get too energetic as it could crack, but you could always make a replacement panel out of another piece of flat plastic or aluminum if needed.

=Vic=

Re: ND6T AGC implementation for uBIT-X

David Wilcox
 

I hate to be a sour pus but just think of the deterioration of all the parts in those unused rigs.  Especially the electrolytics.  I would hate to pay the cost of just keeping them all functional.

I will put extra sugar on my cereal in the morning.  Maybe that will fix my attitude.  Ha!

Dave K8WPE

On Apr 30, 2018, at 9:14 AM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

Wonder how much is tied up in this shack (W9EVT)?

<W9EVTShack.jpg>

Jack, W8TEE



On Monday, April 30, 2018, 8:59:02 AM EDT, Bo Barry <wn4ghv@...> wrote:


It's an international fact that hams are called a cheap gang, but when you go into their shack you are usually impressed with their vast collection. My memories of constantly repairing equipment for hams and only getting a thank you kinda confirms the title tho.  So let's just say we always get the biggest bang for our bucks. Bo W4GHV since '54
<W9EVTShack.jpg>

Re: ND6T AGC implementation for uBIT-X

alans77@...
 

Please put me down for 2 click boards too. I have already signed up for 2 AGC boards.
73
Alan N4AYE

Re: ND6T AGC implementation for uBIT-X

Ken
 

Hi Kees

If you're maintaining a list of people wanting kits, then I'll have 4 of each please.

73

Ken VA3ABN

On Mon, Apr 30, 2018 at 9:53 PM, Kees T <windy10605@...> wrote:
Ken,

As many as required.

We need to build and test a few when the boards arrive (plenty of volunteers) and then we'll let er' rip. Status will be posted here.
Assuming I can get 100% yield on the shear that's 160 AGC and 320 Click boards initially, more as needed after that. With the DHL shipping I'll have to figure out what the board cost is to me and go from there. You will be surprised, it will be quite low. What drives overall kit prices up is US/DX postage, PayPal fees, and packaging. Quantity is what makes it cheap.

73 Kees K5BCQ 


Re: ND6T AGC implementation for uBIT-X

pat griffin
 

I'm on the late bus.  If this is the place to get on the list, I would like two AGC boards, please.

Thanks es 73,

Pat AA4PG


Pat Griffin
http://www.cahabatechnology.com



From: BITX20@groups.io <BITX20@groups.io> on behalf of alans77 via Groups.Io <alans77@...>
Sent: Tuesday, May 1, 2018 3:51 AM
To: BITX20@groups.io
Subject: Re: [BITX20] ND6T AGC implementation for uBIT-X
 
Please put me down for 2 click boards too. I have already signed up for 2 AGC boards.
73
Alan N4AYE

USB and LSB swapped in KD8CEC version 1,.073 beta release

Frank PA7F
 

Hi all,

After upgrading from KD8CEC 1.061 to 1.073 beta and attempting to calibrate the CW RX BFO I find that USB and LSB have been swapped. Anyone notice this?
Please take no offense if this has been reported before.

73, Frank
PA7F

Re: Got my Excellway case from China today.

MVS Sarma
 

for cutting rectangular windows in plastc , I resort to lamination cutter sold in India at just fraction of a $. I keep the too dawing across the 4 lines of the rectancge -say lcd mounting window.  After a while i could push out the small piece from the plastic.
 here is a link to show how a liminaTE CUTTER LOOKS

https://4.imimg.com/data4/CT/VC/ANDROID-6477868/product-500x500.jpeg


Regards
MVS Sarma
 

On Tue, May 1, 2018 at 2:30 PM, Vic WA4THR via Groups.Io <vhklein@...> wrote:
Good tips on working with the plastic case. Another is to use a small rotary disk cutter like a Dremel and I have a Dremel-clone that I picked up at a yard sale for $5 that works great. I was able to cut against a full-size printing of the panel layout that I taped to the back. Still, I cut the large square holes slightly undersized and used a flat file to trim them up. The result was I could make a nice friction-fit for the LCD display without needing extra hardware or bezels. Regular drill bits adjusted larger with a round rat-tail file worked for controls and connectors. I found the Baggood case very easy to work with compared to the metal cases I used years ago, but watch that you don't get too energetic as it could crack, but you could always make a replacement panel out of another piece of flat plastic or aluminum if needed.

=Vic=


Re: Antenna

Kelly Jack
 

Summary of Steve Ellington's video presentation on efhw on youtube.

  • First half up to minute 38 is a bit of a history on how the efhw arose, starts with the zepp. Talks about longwires fed by 9:1 unun. EFHW stuff starts at 38 min and you could probably skip to here and not miss much. Quite easy to watch at 2 times speed.
  • Steve mentions that he is not an EE or considers himself to be an antenna expert rather someone who has been experimenting with antennas for a long time.
  • Steve dissects a myantennas efhw 8010. See attached snippet from the video.
  • Grounding methods are discussed. Recommendation is to ground at the transformer and again at the radio end for max measured current. Note he uses a version for 20m for this test. See snippet pic for his summary.
  • Uses same 20m version to compare with a dipole version and compares radiated rf. Note that this is not far field.  Steve finds EFHW equal to the dipole version in this test.
  • Beyond just an EFHW Steve shows how to add 160M (and 60M and 6M).  Requires an extensive ground system which sort of defeats one of the attractions of the EFHW.  See pic. The schematic drawing in the video does not have a cap that was needed so I have added it.  Blue lines represent the cap which Steve says needs to be 0.0015pf (this does not seem right to me). Note this cap and schematic is only required for the extra bands.  Potentially 60M and 60M could be reached with a tuner??  I don't know.
  • 75M option.  As constructed the antenna resonated in the lower end of he 80M band. Add a cap (250pf - 500pf) at the half way point to resonate at 75M without impacting the other bands.
  • Compensating coil. The antenna resonates most bands at the upper end of the bands, ie phone end.  if you want the CW end of the bands add a coil, 5 turns of 14ga enamel copper wire on 1 inch coil 72 inches from the transformer.  See snippet (from another video).
I do recommend watching the video and others on Steve's channel, I find Steve to have a personable style, a more scientific method than most when it comes to antennas and he has other radio videos that I have found useful.  IC7300 seems to be a theme also. And there is a video on an interesting monoband antenna called a folded counterpoise which is a 160M antenna that uses a full length counterpoise folded back on itself a couple of times underneath an inverted L wire instead of a ground screen. Not really what people are after in this thread but interesting nonetheless.  I have no association with Steve or his channel.

Regards




Simon
VK3ELH