Re: hacking bitx40 for 20 metre
#bitx40
Reduce the value of frontend coil and caps by half. Change the LO to 26MHz or 2MHz , later might be too low and result in higher spurii..
Rahul VU3WJM
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I'm going to step up to the 5" soon as I can afford it. I have the 3. 2 inch right now. Kevin Rea K6REA
On Sun, Jul 29, 2018, 10:03 AM Joel Caulkins < caulktel@...> wrote: I'm using the 3.2 and feel it's just big enough, a little bigger would be better if you're going to use your fingers otherwise a stylus would be better on the smaller displays.
Joel
N6ALT
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Re: uBitX SSB transmit oscillations on 20m only
#ubitx
Thanks, Raj. I have tried most of those. It seems like I have audio feedback not induced RF. In transmit I hear low volume audio from the speaker or headphones on all bands but especially above 14MHz. It is odd that an apparent audio "leak" is sensitive to the transmit frequency, that it is strongest on 20m.
I have read that the BitX designs use the audio stages in a unique way. My problem acts like the audio from the microphone goes into the receiver audio stream, that the receiver is not shut down -muted - when the T/R relay goes into transmit as it is on all transceivers I have worked on.
Although I have an oscilloscope I have not yet figured out where to probe in that dense board to try to find the problem.
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Re: #ubitx #ubitx-help Not able to set up extension switches using CEC firmware
#ubitx
#ubitx-help
Tom, the Arduino website says the Nano has a pull up value of 100 megohms. I need to find a way to wipe and reset the processor to see if the pins go back to the original value.?
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On Wed, Jul 25, 2018 at 03:48 PM, Tom, wb6b wrote:
That is interesting. Maybe the processor chip is an outlier, with an exceptionally high internal pull-up value. You could connect your own pull-up, like 22k ohms from +5 volts and the function switch, and see if that helps.
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Re: [VK3 Event] Bring your Bitx/uBitx - Melbourne QRP by the Bay 28 July
Looks fun, I wish I was there.
Joel
N6ALT
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I'm using the 3.2 and feel it's just big enough, a little bigger would be better if you're going to use your fingers otherwise a stylus would be better on the smaller displays.
Joel
N6ALT
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Re: End Fed antennas w/ uBITX
#ubitx
Jack,
Well it could be worse...? My other half will not permit guy wires.? ?Towers are ok though!
Rules around this house are simple, keep it in your room, nothing that will dim the lights
in the town (or the house) and absolutely no guy wires.
Easy, no!? I have my esthetic preferences.? No wires dangling in the nice grassy back lawn.
Hence End Fed Half Waves, and a tower with all my VHF antennas which also
supports one end of the EF-quad.? Down back in the trees is the 160M dipole,
the low (maybe 10-12ft high) NVIS 75M wire, and the K6STI 10M loop hanging
from a very high oak limb.? Buried coax feeds for each.
A great antenna for most any use and especially for 20/15/10? is the?
the VE7CA? (QST september 2001) triband 2 element wire beam.? IT also
scales well for 40/20 as a dual band.? He also cooked a WARC version.
Any sort of pole bamboo or those light 6m or longer fiberglass "breem/crappi/panfish"
pole work well for a 20M dipole of light wire like 22 or 24 hookup wire (dipole or endfed).
One will do for an inverted V for 40M, just try to keep the ends high.
Why for is your EFHW crappy?? ?Least its a full size antenna. Everything smaller
will be poorer.? The best is the Wireman 534.. here is a description:
'Invisible' Toughcoat 'Silky' 26 AWG, 19 strand 40% copper-clad steel (OD 0.020")
with the same jacket as 531 (Nominal OD, 0.050" including 0.015" jacket, but super
small for that 'low profile' antenna or pocket 'weekender' long wire. Weighs less
than one pound per 1000 feet! Not recommended for 160 meters.Break strength 25 lbs
Its the best wire I've found for being very difficult to see at 30ft.? Its also less inclined
to snag or knot up.? No they didn't pay me but I've used enough!
Alas, people think those tuned loops are efficient... not.? They are compact though.
FYI the best height is at least one loop diameter or higher.? The big selling feature
is the bidirectional null as it really helps with noise.
My idea of a QRP antenna, Mosley TA33JR, the JR version will tolerate 300W
and that should be enough for a 5W radio.? I had one up for a few years until
its aging parts (it had to be at least 30 years old) fractured from corrosion and
work hardening from years of wiggling in the breeze.? I can say even at 32ft
it was a force!? ?ON4UNs famous antenna had a casualty so maybe that is
his new one.? ?HE really took rule oen and two to heart, higher and more metal,
lots of metal!
Allison
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Also Amazon?https://www.amazon.ca/s/ref=nb_sb_ss_i_2_7?url=search-alias%3Daps&field-keywords=nextion+display&sprefix=nextion%2Caps%2C162&crid=E998P067SHCK
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Re: End Fed antennas w/ uBITX
#ubitx
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From: [email protected] [mailto: [email protected]] On Behalf Of m5fra2 via Groups.Io Sent: Sunday, July 29, 2018 8:32 AM To: [email protected]Subject: Re: [BITX20] End Fed antennas w/ uBITX ? Maybe it was a bit off topic? ? From: [email protected] <[email protected]> On Behalf Of ieand@...
Sent: 29 July 2018 10:30
To: [email protected]
Subject: Re: [BITX20] End Fed antennas w/ uBITX ? I really fail to see a serious problem with this thread. Sure if ppl don't like a bit of controversy and vigorous discussion then by all means hide the thread but personally? I have learned more from this thread than any other I can remember in the bitx20 group.
Now Ill just have to build a couple efhw? antennas and and do some hands on testing.
Ian? -- ¡_. _._
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Re: End Fed antennas w/ uBITX
#ubitx
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On Sun, Jul 29, 2018 at 7:02 AM Jerry Gaffke via Groups.Io <jgaffke= [email protected]> wrote: Looking at the website in my chrome browser, the bottom of each message shows
? ? "Reply",? ? "Like",? ?and? ?"More",? ? the? "More" expands to? "All Posts By This Member",? and "Report This Message".
No "Mutes this Topic" that I can find.
Perhaps I've missed it somehow, let me know if that's the case as it would be quite handy.
Perhaps you are using some email reader that allows you to reject a thread.
Unfortunately, not everyone does.
Regardless of whether I can kill a thread, I think the ability to move a discussion that
large numbers of forum members would just as soon not see would be a real plus on occasion.
Unlike an email exchange (also an alternative), anyone with any interest at all could follow
the conversation in that other forum.? Or sample it occasionally when they have time to kill.
Jerry?
On Sun, Jul 29, 2018 at 03:45 AM, Ken Hansen wrote:
At the bottom of every message is a series of links, one of which 'mutes this topic' for the subscriber.
Ken
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On Jul 28, 2018, at 9:43 AM, Jerry Gaffke via Groups.Io <jgaffke=[email protected]> wrote:
If everyone had a means to hide certain threads when browsing the forum,
that should also work well enough. Unfortunately, that is not the case.
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Re: End Fed antennas w/ uBITX
#ubitx
What was her problem with it, isn't she a fan of orange?
Vince - K8ZW.
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On 07/29/2018 09:58 AM, Jack Purdum via Groups.Io wrote: I think everyone here knows that, when working QRP, the antenna system
is a HUGE factor in one's success, or lack thereof. The good news: I'm
fortunate in one manner, in that I am surrounded by 80' trees on almost
3 acres. The bad news: The XYL will not abide ANY antenna that is
visible. She voted this one down:
Inline image
My antenna situation poses a true dilemma (i.e., two choices, both bad),
in that I really enjoy QRP work, but with my crappy EFHW, I really need
more power to be effective. So, any time I see an antenna article that
might even hint at being stealthy, I'm reading it. Indeed, I would like
to see more posts about people who are successfully using their ?BITX
with stealthy antennas. When JackAl is done, a mag loop and controller
are in my future.
Jack, W8TEE
On Sunday, July 29, 2018, 9:44:16 AM EDT, Jerry Gaffke via Groups.Io
<jgaffke@...> wrote:
Any *Bitx* owner has to deal with antennas if they wish to get on the air.
Often the antenna can be more of an obstacle than the *Bitx*.
Yes, opinions will vary about what is a suitable subject for discussion
here.
An example of definitely in: Spurs and transmit power levels across
the various bands on a uBitx.
Definitely out: Even the most oblique reference to US politics.
I just violated my own rule there, let's hope this thread doesn't blow
up again.
Jerry
On Sun, Jul 29, 2018 at 06:32 AM, <m5fra2@...> wrote:
Maybe it was a bit off topic?
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Michigan VHF Corp.
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I got my 2.8 inch Nextion from robotshop.ca
they also have the 3.2 inch ?
Only took 2 days for it to arrive.
AL? VE3RRD
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Re: End Fed antennas w/ uBITX
#ubitx
Thin black wire is really hard to see. ?I struggle to get the sun in just the right position to be able to shoot photographs of people can at least SEE my 3 antennas.... ?
300ohm window line is fairly ?hard to see, also. ?
I have made insulators from quarter inch plastic stiff tubes before.... left over from medical supplies.?
braided fishing line can be had up to 80 pounds strength, and it¡¯s flat impossible to see, if you buy dark green. ? I use bright orange to even have a prayer of finding it ?after I shoot it over trees.
Run it to a balun at the back of your house. Instant near zero-loss center fed , off center-fed, whatever you want Antenna.
If you want vertical, run it along side the trunk of a good tree. ? Or put in a really proud flagpole! ?
Gordon. ?
On Jul 29, 2018, at 10:40, Jerry Gaffke via Groups.Io < jgaffke@...> wrote:
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Jack,
It's unfortunate she had you take down that other antenna.
If it's high enough the neighbors won't even see it, especially on a cloudy day.
? ??
So, exactly what do you have in the way of a crappy EFHW, and what matching network?
Why is it crappy?
Then I'll know what not to do.
If you want stealth, that's a good way to go.
Some skinny wire, perhaps galvanized steel for strength, and a matchbox on the side of the house
are much harder to see than coax going up to the middle of a dipole.
Jerry
On Sun, Jul 29, 2018 at 06:58 AM, Jack Purdum wrote:
I think everyone here knows that, when working QRP, the antenna system is a HUGE factor in one's success, or lack thereof. The good news: I'm fortunate in one manner, in that I am surrounded by 80' trees on almost 3 acres. The bad news: The XYL will not
abide ANY antenna that is visible. She voted this one down:
?
My antenna situation poses a true dilemma (i.e., two choices, both bad), in that I really enjoy QRP work, but with my crappy EFHW, I really need more power to be effective. So, any time I see an antenna article that might even hint at being stealthy, I'm
reading it. Indeed, I would like to see more posts about people who are successfully using their ?BITX with stealthy antennas. When JackAl is done, a mag loop and controller are in my future.
?
Jack, W8TEE
?
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Re: KD8CEC - Nextion Display - IAN questions
Kevin,
You just tap on the display digits to get to that screen.
Joel
N6ALT
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Re: uBITx V3 Stuck in Transmit
#ubitx
I had a similar problem in that when I keyed the transmitter it would stay on. But was intermittent. I found I could tap the relay and it would turn off. Although sometimes it would continue to transmit with a high swr. I tried chokes but the relay was bad. I could tap on the relay with screwdriver handle and it would go back to normal. Also weirdly it had no power on 30meters.?
A new relay fixed all the problems. It was less than a dollar out of china.
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Re: End Fed antennas w/ uBITX
#ubitx
Jack, It's unfortunate she had you take down that other antenna. If it's high enough the neighbors won't even see it, especially on a cloudy day. ? ?? /g/BITX20/message/24965So, exactly what do you have in the way of a crappy EFHW, and what matching network? Why is it crappy? Then I'll know what not to do. If you want stealth, that's a good way to go. Some skinny wire, perhaps galvanized steel for strength, and a matchbox on the side of the house are much harder to see than coax going up to the middle of a dipole. Jerry
On Sun, Jul 29, 2018 at 06:58 AM, Jack Purdum wrote:
I think everyone here knows that, when working QRP, the antenna system is a HUGE factor in one's success, or lack thereof. The good news: I'm fortunate in one manner, in that I am surrounded by 80' trees on almost 3 acres. The bad news: The XYL will not abide ANY antenna that is visible. She voted this one down:
?
My antenna situation poses a true dilemma (i.e., two choices, both bad), in that I really enjoy QRP work, but with my crappy EFHW, I really need more power to be effective. So, any time I see an antenna article that might even hint at being stealthy, I'm reading it. Indeed, I would like to see more posts about people who are successfully using their ?BITX with stealthy antennas. When JackAl is done, a mag loop and controller are in my future.
?
Jack, W8TEE
?
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Re: uBITX HF transceiver and blue MBITX metal case.
Dear Sunil, Thank you so much for the info and pics of case assembly,interface pcb etc.Exactly what I required to complete the USB link from the session to the outside world.Having such fun assembling the rig and the only difference is that I have used the
pcb for the Jack ports.Cheers. Ian M0IDR
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Sunil, thank you very much for the collection of photos!
Roy
WA0YMH
On Sun, Jul 29, 2018, 1:07 AM Sunil Sankaranarayanan < vu2mtm@...> wrote:
Ian,
? ? ? ? Looks like you have the uBitx case from Sunil Lakhani VU3SUA / ? Attached are the pix for wiring up the Ubitx and the additional boards in the Case. It is documented at various places by VU3SUA. I have downloaded all the pix and put it into a single folder and that should help you.
73
Sunil Sankaranarayanan VU2MTM
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Re: hacking bitx40 for 20 metre
#bitx40
I'm sure others will chime in but I remember Ryan Flowers doing a lot of experimenting with different bands on the BITX40 on his blog.? Search his site for 20M.? I think Don did a band conversion too.
--
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Re: End Fed antennas w/ uBITX
#ubitx
I think everyone here knows that, when working QRP, the antenna system is a HUGE factor in one's success, or lack thereof. The good news: I'm fortunate in one manner, in that I am surrounded by 80' trees on almost 3 acres. The bad news: The XYL will not abide ANY antenna that is visible. She voted this one down:
My antenna situation poses a true dilemma (i.e., two choices, both bad), in that I really enjoy QRP work, but with my crappy EFHW, I really need more power to be effective. So, any time I see an antenna article that might even hint at being stealthy, I'm reading it. Indeed, I would like to see more posts about people who are successfully using their ?BITX with stealthy antennas. When JackAl is done, a mag loop and controller are in my future.
Jack, W8TEE
On Sunday, July 29, 2018, 9:44:16 AM EDT, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
Any *Bitx* owner has to deal with antennas if they wish to get on the air.
Often the antenna can be more of an obstacle than the *Bitx*.
Yes, opinions will vary about what is a suitable subject for discussion here.
An example of definitely in:? ?Spurs and transmit power levels across the various bands on a uBitx.
Definitely out:? Even the most oblique reference to US politics.
I just violated my own rule there, let's hope this thread doesn't blow up again.
Jerry
On Sun, Jul 29, 2018 at 06:32 AM, <m5fra2@...> wrote:
Maybe it was a bit off topic?
?
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Bruce W4BRU
Joel Caulkins/N6ALT
MadRadioModder
_Dave_ AD0B