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Date

Re: Got my Excellway case from China today.

 

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.? .

73

Gian
I7SWX


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: ND6T AGC implementation for uBIT-X

 

Hello Kees,

Are you planned to ship outside US ?

if yes, please 1 pcb of each for me.

vy¡¯ 73s de Jacques ¨C F1APY

?


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: Got my Excellway case from China today.

 

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: Antenna

 

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







Re: U1 fried

 

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: BITX20 at Dayton Hamvention?

 

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 ?BITX 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: Got my Excellway case from China today.

 

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


Re: VK2AUJ's ?BITX project

 

¿ªÔÆÌåÓý

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?.. 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: Nano Capability with 2.8" TFT Displays

 

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: Got my Excellway case from China today.

 

Try here:

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: Antenna

 

Thanks for the summary.
I'm on a cell phone link, makes youtube even harder to deal with.
From what I saw, he was not terribly concise.
But did seem to know what he was doing, spoke of modelling his antenna before settling on the inverted L.

Jerry


On Mon, Apr 30, 2018 at 07:46 pm, Kelly Jack wrote:
Jerry,

Re youtube videos- I agree the information rate can be low. One thing I usually do is speed up the playback rate to increase this and save time. Also some skipping through the intro to get to the meat. Some utubers are worse than others at getting to the point and some just talk slow.?

Of Steve's videos the ones I found most interesting / useful were the one on winding the toroids, the one experimenting with grounding options and a more recent one where he discusses using a different ferrite mix to handle more power. The titles of the videos should point people in the right direction.

No idea if Steve has found something better but I see he still seems to be experimenting with it as a new video went up a couple of days ago.

I'll try to watch the long one again shortly as given it was a presentation he gave and only a month old I presume it contains most of what the other videos have.

Regards



Simon VK3ELH?


Re: Got my Excellway case from China today.

 

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.



VK2AUJ's ?BITX project

 

¿ªÔÆÌåÓý

www.mwrs.org.au
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: ND6T AGC implementation for uBIT-X

 

Hi Kees,

Please put me down for one of each of the boards.? W0DF


Re: Got my Excellway case from China today.

Bo Barry
 

Sorry, they were on eBay.


Re: Antenna

 

On Mon, Apr 30, 2018 at 05:51 pm, Jerry Gaffke wrote:
I sat through the 8:17 minute April 1 2016 Steve Ellington video on the myantennas EFHW-8010.
Wow, now I remember why I mostly avoid youtube, maybe 10 seconds worth of? information in all of that.
Anyways,he has the matchbox about 5' up in the air, the wire then goes
straight up to 55 feet and then over, and he was planning to rip out his other antenna to make room?
for a second EFHW-8010 so he could swap patterns.? Which is to say that he likes it.
Oh, and on long 80m CW transmit sessions at 500 Watts he sees his SWR creep up suggesting
the transformer was maybe overheating, not an issue on the other bands.??
And he's very fond of LMR-600 coax.

Maybe Simon could give us an executive summary on his other dozen or so videos,
especially the one that's an hour and a quarter long.?
Did Steve E. ever manage to build something he liked better than the EFHW-8010?
What's a good video to start with for somebody wanting to build one from scratch?
Any tidbits not typically found in other material on EFHW's?

Jerry, KE7ER
?


On Mon, Apr 30, 2018 at 04:50 pm, Kelly Jack wrote:
There is a youtube channel by a ham called Steve Ellington that looks at various aspects of the efhw including construction and the myantennas version. Search "EFHW" and the channel came up in a number of the results.


?Jerry,

Re youtube videos- I agree the information rate can be low. One thing I usually do is speed up the playback rate to increase this and save time. Also some skipping through the intro to get to the meat. Some utubers are worse than others at getting to the point and some just talk slow.?

Of Steve's videos the ones I found most interesting / useful were the one on winding the toroids, the one experimenting with grounding options and a more recent one where he discusses using a different ferrite mix to handle more power. The titles of the videos should point people in the right direction.

No idea if Steve has found something better but I see he still seems to be experimenting with it as a new video went up a couple of days ago.

I'll try to watch the long one again shortly as given it was a presentation he gave and only a month old I presume it contains most of what the other videos have.

Regards



Simon VK3ELH?


Re: ND6T AGC implementation for uBIT-X

Bo Barry
 

Kees I'm still using your great VIA antenna analyzer. Fortunately a friend of yours helped with the soldering! ?I've since got the necessary equipment and am much better at it. ? The Fox Delta analyzer is good too.
Bo W4GHV?


Re: ND6T AGC implementation for uBIT-X

 

Robert,

I responded to your note....let me dig it out and send it again (offline).

73 Kees K5BCQ

-------------------------------------------------------------------------------------------------
Others,

Yes, there seems to be much interest and I'm looking forward to it .....I think.

Don and Ion are quite pleased too.?

I won't "push the button" until May 2nd since they are on "Labour Day Holiday" through May 1st. That will allow me to check for errors and read your comments.

73 Kees K5BCQ