Re: no icon on sbitx on touch screen...help....
The desktop icon is created by copying a file with .desktop extension in the folder/home/pi/Desktop. That file is already in the /home/pi/sbitx folder.? 1. Press ctrl-alt-T to open the terminal. 2. Type : cp /home/pi/sbitx/sBitx.desktop /home/pi/Desktop Press enter 3. Reboot
hello,?? from? in3izq?? danilo...?? have a? little? problem with my? sbitx . during? first test, i? don't know? how is happen ,?? have lost? icon of sbitx and? fldigi? on? touch screen . when?? sbitx? on , i have?? only icon? of raspberry ,? and other? 2 on screen.? Need reload all software of? sbitx? on sd ? when i? start? sbitx? i have? only
icon? of raspy,?? not? screen with? schematic of radio and other.? sorry? for my? english. i hope? in? your message.? tnx in advance? and? best regard ? danilo in3izq?
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Re: Ubitx version 3 heatsink
Please let us know how that works out. I've wanted to do the same thing to mine.
Max
On Saturday, September 3, 2022, 07:23:03 PM CDT, Tech Guy <tech48055@...> wrote:
Can both IRF 510s be mounted to one heatsink if mica insulators are used? I¡¯m thinking about doing a separate 24v supply to the finals.
John N4HNO?
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Re: Ubitx version 3 heatsink
Wasn't there some sort of problem doing that? Capacitance between the heat sink and the IFR510 maybe? I vaguely remember some sort of issue doing that.
Max
On Saturday, September 3, 2022, 07:23:03 PM CDT, Tech Guy <tech48055@...> wrote:
Can both IRF 510s be mounted to one heatsink if mica insulators are used? I¡¯m thinking about doing a separate 24v supply to the finals.
John N4HNO?
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Can both IRF 510s be mounted to one heatsink if mica insulators are used? I¡¯m thinking about doing a separate 24v supply to the finals.
John N4HNO?
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The red line on the spectrum display is controlled with the pitch control. That marks the cw/rtty/psk31 decoder's central frequency.
On Sun, Sep 4, 2022, 3:06 AM Steve Beckman < n3sb@...> wrote: Pete - exiting the sbitx application and stopping fldigi, then restarting sbitx will often make the ?? question marks go away.
While sbitx is running, use Alt-Tab to switch over to fldigi to see if the CW signal is centered on fldigi's receive passband.?
73, Steve. N3SB?
-------- Original message -------- Date: 9/3/22 5:24 PM (GMT-05:00) Subject: Re: [BITX20] More Updates #sBitx #sbitx-k3ng
On second thought, I'm not sure I am correct as it seems hard to make it decode under either code with much reliability. So please disregard until you have nothing better to work on. ;-) My internal decoder has been good enough for lots of years and should continue for a while longer. Pete WK8S
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Re: Daylight Radio PTO -- 3D printed inductor forms
Dear Ashhar,
I was able to scale the part to 110% of the stl file you send me and the nuts fit perfectly.? CURA will allow you to scale the part before you slice it.?? So, it took a couple of tries and I ended up with scalling X,Y, and Z by 110% and then sliced it and my part was able to
fit the nuts really well.?? Yes some of the nuts seem to be a slightly different size but by adjusting the size, you should be able to come up with a good match.
Take care and have fun.?? I am getting close to wiring up my receiver.?
73 Dave WA5DJJ
SUPER QRSS/WSPR GRABBER https://www.qsl.net/wa5djj/
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Re: Daylight Radio PTO -- 3D printed inductor forms
Dear Dean,
On the other? PTO stl files I had to increase the part by 10% on all dimensions.??? Now the nuts fit perfectly.?? In CURA you can arbitrarily increase or decrease a parts size by a percentage before you slice it.?? Then slice it and print it.? then judge from there if you need to increase it or decrease it? until the brass nuts fit.?? That may also change the size of the turns used but you can adjust that after you get the PTO oscillator built by taking turns of the 30 turn end of the coil.?? (on my other one it was about 4 or 5 turns.?
I didn't need to raise my mechanism up so I did not use the part your printing.
Take care and have fun.?? Good luck.
73 Dave WA5DJJ
SUPER QRSS/WSPR GRABBER
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Pete - exiting the sbitx application and stopping fldigi, then restarting sbitx will often make the ?? question marks go away.
While sbitx is running, use Alt-Tab to switch over to fldigi to see if the CW signal is centered on fldigi's receive passband.?
73, Steve. N3SB?
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-------- Original message -------- From: "PeteWK8S via groups.io" <pmeier@...> Date: 9/3/22 5:24 PM (GMT-05:00) Subject: Re: [BITX20] More Updates #sBitx #sbitx-k3ng
On second thought, I'm not sure I am correct as it seems hard to make it decode under either code with much reliability. So please disregard until you have nothing better to work on. ;-) My internal decoder has been good enough for lots of years and should continue for a while longer. Pete WK8S
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On second thought, I'm not sure I am correct as it seems hard to make it decode under either code with much reliability. So please disregard until you have nothing better to work on. ;-) My internal decoder has been good enough for lots of years and should continue for a while longer.
Pete WK8S
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Re: Daylight again mixer noise
put it in clear epoxy and sell it as modern art?!?
dg9bfc sigi
Am 03.09.2022 um 16:15 schrieb barry
halterman:
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The joke for today folks!
Here is a picture of my pile of parts.? I am somewhat
embarrassed to show my shoddy workmanship.The BFO is to the
left, off the main board. In this picture the crystal filter
output is not connected to the mixer (I was troubleshooting).
On Sat, Sep 3, 2022, 12:46 AM
Ashhar Farhan < farhanbox@...>
wrote:
It could be oscillations as well. Can you post
a picture of your build?
On Sat, Sep 3, 2022, 9:41
AM barry halterman < kthreebo@...>
wrote:
Josh, with the input to the mixer
disconnected and the BFO quenched, there is no
noise. Ashhar pointed out that what I am hearing is
phase noise from the BFO. If I am experiencing phase
noise, that phase noise is above all but the
strongest received signal.
?
Barry
?
?
Sent from for Windows
?
?
Hello
I would like to start building this rig . But don't
have a 3d printer . Is there anyone that is making
the pto form and cores ? I would like to get a few
sets thanks .
?
On
Fri, Sep 2, 2022 at 4:02 PM, Joshua Blanton
The basic design of
the mixer should be very quiet - many
low-noise VHF receivers use similar
constructs in their front-ends.? Are you
certain that your noise isn't coming in
from somewhere else (a noisy power
supply rail, bad bypass caps/poor power
bypassing, or a bad part)?? If you don't
have *any* input into the mixer (no BFO
and no IF) it should be quite silent -
but you might need to terminate both
inputs with caps to ground.? It seems
possible that this circuit could
oscillate, depending upon the layout -
is that a possibility that you've
considered?? I have read many warnings
about J310 oscillations at VHF, which
can be hard to find with slower
oscilloscopes.? Long leads are not your
friend with this particular piece of the
circuit.
I haven't built this
mixer yet, so I'm speaking theoretically
- but it looks like a textbook cascode
mixer circuit.
?
On Fri, Sep 2, 2022
at 10:38 AM barry halterman <kthreebo@...>
wrote:
I am curious as to
how much mixer noise I should be
hearing from the second mixer. Should
the noise (hiss) be stronger than
normal band noise? I might be looking
into something that is not fixable and
the nature of the beast.
--
Chris Mannon
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Good day Goody,
Just want to report that under the latest and current version of your code the CW decoder does not work. Just lots of random letters and ? marks no matter how carefully I tune. I wondered at see this so I rebooted to Farhan code and it started decoding. This does not impact me much as I have a slow but working decoder between my ears. It gets enough right to get by. :-)
Everything seems to work correctly as far as I could tell.
Pete WK8S
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Re: Replacement encoder for uBitx V6
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Re: Replacement encoder for uBitx V6
Try this one??Mouser has plenty in stock, only $2.68 each.
Max KG4PID
On Saturday, September 3, 2022, 03:30:40 PM CDT, K4LXY <k4lxy.cw@...> wrote:
I just got a second uBitx V6 and unlike my earlier one, the encoder has steps. Any suggestions about a smooth encoder replacement? ?I don't need the push switch as I'm using N8ME firmware.
Tnx
73 Howard K4LXY
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Re: Replacement encoder for uBitx V6
Want to trade? I'm serious. Mine is smooth but I think I'd like one that has the detents. My hands shake a lot and I have a hard time sometimes getting the frequency I want.
There was a Bourns (spelling) part number given some time ago that should work. Maybe a search on this forum will turn up something.
Sorry I couldn't of more help.
Max KG4PID
PS You can contact me if you're interested. callsign at yahoo dot com
On Saturday, September 3, 2022, 03:30:40 PM CDT, K4LXY <k4lxy.cw@...> wrote:
I just got a second uBitx V6 and unlike my earlier one, the encoder has steps. Any suggestions about a smooth encoder replacement? ?I don't need the push switch as I'm using N8ME firmware.
Tnx
73 Howard K4LXY
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Glad to hear, David.?
I just picked up a second one an am trying some other mods - minimally a Sotabeams DSP to see how it compares to the Hi-Per-Mite filter. ?The DSP has an LED for when you are in the passband, so it may eliminate the need for a zero beat indicator, and an audio limiter may be less important. ?While I wait for the DSP, I cut the trace from the volume control to the audio amp and installed headers so that I can easily plug the DSP in (in the meantime, I installed a jumper). ?Unlike the Hit-Per-Mite, it requires audio amplication on the output.
The N8ME firmware is a huge improvement over the stock, at least on CW. ?I was going to install a Nextion display but I'm not sure I want to - the N8ME is great, and I don't see that the Nextion setup adds much other than a fancier (and maybe harder to use) display.
Feel free to email me privately if I can be of more help.
73 Howard K4LXY
73 Howard K4LXY
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Re: Daylight again mixer noise
Brian, yes. I have been thinking that I might have a bad J310. ? Ashhar, here are some readings from my build. The VFO RF voltage into the first mixer is 2.4Vp-p. Disabling the first makes no difference in the amount of noise. BFO output is 3.48vp-p. ? Jack, the board is painted a reddish color to mask the blood. Guts are out of the picture completely. ? ? ? Sent from for Windows ?
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From: BrianSent: Saturday, September 3, 2022 11:42 AM To: [email protected]Subject: Re: [BITX20] Daylight again mixer noise ? It could also be a faulty J310 (ESD damage??).
Years ago when when JFET's were the latest, I built a transceiver that was lots of noise and weak signals. Years later I pulled the transistors to use in a new project and found that the gates were all leaky. They sort of worked and the dc voltage measurements were normal.
73 Brian.
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Replacement encoder for uBitx V6
I just got a second uBitx V6 and unlike my earlier one, the encoder has steps. Any suggestions about a smooth encoder replacement? ?I don't need the push switch as I'm using N8ME firmware.
Tnx
73 Howard K4LXY
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Re: Daylight Radio PTO -- 3D printed inductor forms
Dean, looking good.. If you seem? to have some extra play between the screw and nut, wrap the screw with a layer of Teflon pipe thread tape. It takes some of the wobbling out. ? Sent from for Windows ?
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From: Dean SoulelesSent: Saturday, September 3, 2022 1:26 PM To: [email protected]Subject: Re: [BITX20] Daylight Radio PTO -- 3D printed inductor forms ? Scaling up by 10% worked perfectly.? Nice snug fit - easily able to insert the nut with fingers.
Now to wind it up and test!
73,
Dean
KK4DAS
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Re: no icon on sbitx on touch screen...help....
How to Easily Create Desktop Shortcuts on Raspberry Pi OS?
--
Gyula HA3HZ
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Re: Daylight Radio PTO -- 3D printed inductor forms
Scaling up by 10% worked perfectly.? Nice snug fit - easily able to insert the nut with fingers. Now to wind it up and test! 73, Dean KK4DAS 
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HA3HZ