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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Re: uBITX HF transceiver and blue MBITX metal case.
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: End Fed antennas w/ uBITX
#ubitx
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
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On Sun, Jul 29, 2018 at 06:32 AM, <m5fra2@...> wrote:
Maybe it was a bit off topic?
?
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Re: End Fed antennas w/ uBITX
#ubitx
Maybe it was a bit off topic? ?
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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: 2 uBitx available for donation to club
VFW post 3115 Amateur Radio Club -W?VFW
4801 West Douglas Avenue
Wichita, KANSAS 67209
The 1st and Oldest VFW sponsored Amateur Radio Club in the USA.. ¿ªÔÆÌåÓý Veterans and their families. Plus the community.
Training, Licensing, Equipment, Public Service,
Available for service veterans and their families at the post is:
Complete HF station 50ft Tower Tribander, 2 repeaters VHF & UHF open to all.
Donations of radio equipment or check are gladly accepted. A donation letter will be returned as were are 501c3 non-profit.
Many of our veterans are disabled and living on fixed income.
We are looking for equipment as well for the ROBERT DOLE VETERANS HOSPITAL in Wichita which our members donate hundreds of hours every year.
Thank you for reading this-
Larry W8LM
ARRL Life member - Licensed 52 years
Past President, 2 Terms VFW post 3115 Amateur Radio Club- W?VFW, Wichita, KANSAS
Volunteer Examiner Team Leader, 10 years. Over 300 licensed.
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Re: uBITX HF transceiver and blue MBITX metal case.
Hi, Jim
With regard to the demise of RS-232, it's important to remember that these same UARTS support RS-422 and RS-485 multi-drop. These protocols are still in wide use (particularly RS-485) in industrial settings because of robustness, simplicity and economy as compared with (for example) Ethernet in the same setting. USB is strictly point-to-point and, while offering good bandwidth, is greatly distance limited compared with 422/485.
?USB is also generally lacking the fully isolated solutions that are often required between "unfriendly" components.
For example, if you want to control something slightly smart up on a tower 500 ft away, isolated and slew rate limited RS-422 is the way to go. USB won't work and copper Ethernet's distance limit rules it out.. Fiber would be nice but gets pricy and complex - and you still likely need power wires.
In short, while most common applications of RS-232 can be replaced by USB (as long as you have some real smarts at both ends), the RS-422/485 applications are still out of reach.
Just my opinions, of course.
73,
Paul K2AYZ
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Re: End Fed antennas w/ uBITX
#ubitx
Looking at the groups.io 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?
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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
?
On Jul 28, 2018, at 9:43 AM, Jerry Gaffke via Groups.Io <jgaffke@...> 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: KD8CEC - Nextion Display - IAN questions
actually, i want to add a button on the front of my rig to get to that screen.
kevin
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Re: KD8CEC - Nextion Display - IAN questions
Hi Ian, I am using the software version 1.095 on my ubitx I was wondering if there was a way to get to this particular screen, or is this a screen from the next version ? thanks, kevin rea lancaster, calif. k6rea 
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Re: uBitX SSB transmit oscillations on 20m only
#ubitx
Bruce,
I dont know if you fixed this problem. Here are some ideas.
Try a shielded wire for microphone inside the enclosure. You MUST use shielded wire for the mic cable outside as it may pick up TX RF.
Solder a 1000pf cap across the socket.
Formula I followed in the 70s for mic mixers was to insulate the jack from chassis. You could screw on an acrylic sheet
piece to your panel and mount the mic jack on it.. but you need to enlarge the chassis hole so that the jack does not ground.
Raj
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At 28/07/2018, you wrote: First a correction. The distorted output is on 20m not 40m. Now that's embarrassing! A form of ham dyslexia perhaps?
Audio feedback? Although I had gone through all the bands with no distorted output, I have been mostly comparing 20m with 40m. Distortion-feedback on 20m, clean on 40m. I just went back through all the bands and noticed that I hear a little audio from my speaker as I go up the bands. 80m, 60m, and 40m are good with a clean signal on the 'scope, nothing from the speaker. 20m is badly distorted with feedback and garbled audio from the speaker. 17m and up (in frequency) clean signal but faint audio from the speaker.
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Re: hacking bitx40 for 20 metre
#bitx40
Fairly healthy rebuild wouldn¡¯t you say?
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has anybody hacked the bitx40 for 20 meter. i have not yet purchased a bitx40 . i only want one band, so ubitx is a bit ottp. But i prefer 20 m to 40 m what coils need rewinding and how many turns. What change to the raduino sketch.
terry gm4dso
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Re: Digital / Audio connector names?
Already answered : Search kf2510 (in this group and on ebay)
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hacking bitx40 for 20 metre
#bitx40
has anybody hacked the bitx40 for 20 meter. i have not yet purchased a bitx40 . i only want one band, so ubitx is a bit ottp. But i prefer 20 m to 40 m what coils need rewinding and how many turns. What change to the raduino sketch.
terry gm4dso
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Which model of Nextion are people using?
73
Ken VA3ABN
On Sun, Jul 29, 2018 at 6:32 AM, hirosmb <hirosmb@...> wrote: I bought it at eBay.
Spec:
// hiro, JJ1FXF
Hi All
Could someone possibly point me to a link to purchase the Nextion TFT and spec sheets?
73
Ken VA3ABN
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Re: End Fed antennas w/ uBITX
#ubitx
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@...> 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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Good to hear, Ken.
I got the 2.4¡± one but feel it¡¯s too small.
I¡¯m planning to buy a little bigger one.
// hiro, JJ1FXF
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Thanks Hiro, exactly what I was looking for.
73
Ken VA3ABN
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Thanks Hiro, exactly what I was looking for.
73
Ken VA3ABN
On Sun, Jul 29, 2018 at 6:32 AM, hirosmb <hirosmb@...> wrote: I bought it at eBay.
Spec:
// hiro, JJ1FXF
Hi All
Could someone possibly point me to a link to purchase the Nextion TFT and spec sheets?
73
Ken VA3ABN
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Michael, Now that you are on frequency you can adjust again the BFO. BFO frequency differs from unit to unit depending on the filter passband. If the pitch on receive is too low you should increase your BFO frequency, or lower it if the pitch is too high. From your IF shift required I guess your pitch is low. Play with BFO (carrier) frequency a little and see if you can get the sound you like. My RV1 setting is about 90% and I get 12 W on 80, 10 W on 40, 7 W on 20. Power out drops to 1.2W at 28.4 MHz. All those powers are CW, key down, not SSB, measured into a dummy load using the power meter on a MFJ antenna tuner. This has been discussed a lot and is the result of components used. You can try some of the hardware mods and find what works for you. Mine is stock, running at 12.8 V provided by a linear, 6 A capable power supply. On SSB my power was low, so I had to increase the microphone amplifier gain. I did not measure the carrier suppression, so I have no reference number for you. I hope this help. 73, Ion VA3NOI -- Ion VA3NOI
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Paul Galburt - K2AYZ
Raj vu2zap
Ion Petroianu, VA3NOI