On Thu, Sep 19, 2024 at 01:15 PM, Bob Brown wrote:
Are these values tweekable in hw_settings.ini?
The scale data in the hw_settings.ini file contains the maximum performance available in the given band.
It is worth using the data provided by the manufacturer.
But if you like variety and modify these, you will either improve or degrade the output level.
Important: always have a copy of the original data!
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Gyula HA3HZ
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Re: Discord communication
Can you send the updated link?
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Are these values tweekable in hw_settings.ini?
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...just wondering: has someone tryed installing SDRPlay sw in the sBitx?
The sw "should" be binary compatible, but SDRPlay removed the images and stopped development.
However the last versions are still available in the net (the Internet never forgets...):
That doesn't mean it will actually work on different hw of course.
But it would be really nice if a double-channel version of sBITX could do diversity with SDRuno...
Sci-fi I guess...
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I read this group by the web page and have all emails disabled;
which is a provision under the "Subscription" menu option.
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On Wed, Sep 18, 2024 at 10:22 PM, Jeff Duce wrote: I can post to both, but I prefer discord to an email list server.
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On Wed, Sep 18, 2024 at 10:03 AM, HA3HZ wrote:
sBitx_log file import into cqrlog without GRID
sBitx_log file import into cqrlog without GRID
the title and the question are incorrect,
because I want to transfer the content from sbitx_log in .adif format,
which is correct sBitx_log file EXPORT into cqrlog
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Gyula HA3HZ
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I'm also interested in CW improvements?to the straight key response (since I sometimes use an external keyer).? ?I tried looking at devfarhan and modem_cs but I couldn't really figure out what improvements have been made.
Can someone summarize any improvements made over, say, the last year, that would improve the CW response to the straight key?? ?I last tried that months ago and my impression from V3 code was that it still had some delays.? ?Does it still check only every 10-20 times per second, and is this adequate???
Sorry for the multiple questions, but figuring all this out is tedious. THANKS for any direction and wisdom, Gordon KX4Z
On Wed, Sep 18, 2024 at 8:02?PM Dan Romanchik KB6NU via <cwgeek= [email protected]> wrote: I got my sBitx yesterday and got it on the air today.? I've made three contacts with it already on 30m CW, but I'm glad to hear that someone is working on the keyer. Right out of the box, the keying is very rough.
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Is there a thread here that will show me how to get this dev code, so I can try it out?
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From: Drew
Demarco
Sent: Thursday, September 19, 2024 2:24 AM
Subject: [BITX20] Max pwr on sbitx v3
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I'm confused is? the max pwr on the v3 25w or 40w
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Re: Renewed attempt to hack together a workable PA #uBITX V6
#ubitx
Will do.? The individual W8DIZ amps are very flat from 1-30 MHz. The spice model as I posted has a 0.5 dB drop from about 14 to 30 MHz for the pair. I'm cautiously optimistic, especially since this effort is based on advice from Allison.? I've finally learned enough to understand at least some of what she was trying to teach. Hihi
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73, Andy
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I'm confused is? the max pwr on the v3 25w or 40w
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I got my sBitx yesterday and got it on the air today.? I've made three contacts with it already on 30m CW, but I'm glad to hear that someone is working on the keyer. Right out of the box, the keying is very rough.
?
Is there a thread here that will show me how to get this dev code, so I can try it out?
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I can post to both, but I prefer discord to an email list server.?
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With respect, Jeff, you'll not get BITX20 community review if you post something to a discord group most here don't use.? Why not post it here?
?
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On Tue, Sep 17, 2024 at 12:10 PM, Jeff Duce wrote:
...? I want to go over my design a couple more times and I'll probably post it on the discord for community review...
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Re: Renewed attempt to hack together a workable PA #uBITX V6
#ubitx
Please post a linearity plot when you complete it. ?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com
email:??bill@... ?
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On Sep 18, 2024, at 2:27?PM, AndyH <awhecker@...> wrote:
? I've decided not to use the K9HZ amp due to its size, and to stick with the QRP-Labs 10 W board with it's much smaller heatsink requirement.? I'm looking for a fairly flat 10 W output from 80 to 10 that will easily fit into the existing uBITX case.
?
I think I'll use two stages of slightly modified W8DIZ 2N5109/2SC5551A amps to replace the Q90 and Q911/912 stages.? The attached LTspice model is my current best guess.? The total gain is about 34 dB, with an output of about 1.6-1.65 V peak, slightly above the 1.58 V peak for a 14 dBm input to the QRP-Labs amp.? There appeared to be some gain interactions when adding the second stage - it took a couple of rounds of tweaking to get the gain back in line.? The R14/15/16 pad might need to move up from 3 dB to 4.? We'll see how well hardware mimics spice.
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73, Andy
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<2n5109_Amp_20Bb_3dBpad_transformer_2InSeries.asc>
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Re: Renewed attempt to hack together a workable PA
Sorry...I broke the thread.
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I've decided not to use the K9HZ amp due to its size, and to stick with the QRP-Labs 10 W board with it's much smaller heatsink requirement.? I'm looking for a fairly flat 10 W output from 80 to 10 that will easily fit into the existing uBITX case.
?
I think I'll use two stages of slightly modified W8DIZ 2N5109/2SC5551A amps to replace the Q90 and Q911/912 stages.? The attached LTspice model is my current best guess.? The total gain is about 34 dB, with an output of about 1.6-1.65 V peak, slightly above the 1.58 V peak for a 14 dBm input to the QRP-Labs amp.? There appeared to be some gain interactions when adding the second stage - it took a couple of rounds of tweaking to get the gain back in line.? The R14/15/16 pad might need to move up from 3 dB to 4.? We'll see how well hardware mimics spice.
?
73, Andy
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With respect, Jeff, you'll not get BITX20 community review if you post something to a discord group most here don't use.? Why not post it here?
?
?
On Tue, Sep 17, 2024 at 12:10 PM, Jeff Duce wrote:
...? I want to go over my design a couple more times and I'll probably post it on the discord for community review...
|
Re: Renewed attempt to hack together a workable PA #uBITX V6
#ubitx
I've decided not to use the K9HZ amp due to its size, and to stick with the QRP-Labs 10 W board with it's much smaller heatsink requirement.? I'm looking for a fairly flat 10 W output from 80 to 10 that will easily fit into the existing uBITX case.
?
I think I'll use two stages of slightly modified W8DIZ 2N5109/2SC5551A amps to replace the Q90 and Q911/912 stages.? The attached LTspice model is my current best guess.? The total gain is about 34 dB, with an output of about 1.6-1.65 V peak, slightly above the 1.58 V peak for a 14 dBm input to the QRP-Labs amp.? There appeared to be some gain interactions when adding the second stage - it took a couple of rounds of tweaking to get the gain back in line.? The R14/15/16 pad might need to move up from 3 dB to 4.? We'll see how well hardware mimics spice.
?
73, Andy
?
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Re: ubitx audio amp problem discovered
I'm still playing with the subject mic amp and think I can present the best I've been able to come up with in LTspice.? This will be the version I'll build and test once I'm back from the scope rescue mission at the end of the month.? The LTspice schematic/model is attached.
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The original Q6 amp had a bit of distortion into a 1K Ohm load, with a 50 mV peak input signal resulting in +332.6 mV and -383.0 mV. The LTspice FFT showed the 10 kHz input to be at -32 dB with the 20 kHz harmonic at -58 dB.
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The attached model shows that R63 is retained, R64 changes from 1K to 130 Ω, and C62 changes from 47 uF to 0.047 uF.? This combo provides between 140 and 147 mV peak on the positive swing, and between 140-144 mV on the negative side? (it seems to vary between different spice runs. Not sure why.)? LTspice FFT shows the primary 10 kHz signal is now -20 dB and the 20 kHz harmonic is down 47 dB to -67.? The 10uF cap in the buffer provides a much better frequency response than a 1uF.
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FWIW...
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73, Andy, KG5RKP/MM
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Re: uBITX Digital Adapter Board pinouts
Sorry if this is a dumb question, but why do you need this? The ubitx already has cat control and picking off audio is not very difficult. I added a cheap sound card to mine and it does digital modes just fine.
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On Wed, Sep 18, 2024 at 10:03 AM, HA3HZ wrote:
I have another question, the text shown in the picture appears in the comment field in the wsjt-x log. I don't remember what switch I turned on at that time or what I did, but that seems like useless information. How can I remove it without having to delete it every time?
I found the answer to my question. If someone else has a similar problem, check "Special operating activity to comments" on the wsjtx/settings/reporting page, if it is marked, it must be deleted. If it is still present (like mine), you need to find the line shown in the picture in the wsjts.ini file, delete it and save it, then restart wsjtx.
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Gyula HA3HZ
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HA3HZ
Bob Brown
Jens/HB9JOI
Dan Romanchik KB6NU
K9HZ