Re: sBitx v2 Spectrum / Waterfall
Mark, Unfortunately, no. The current implementation (see rx_process in sbitx.c) has 2048 bins spread over 25 khz. So, each bin is about 42 Hz.? There are no signals that are narrower than this so make narrower spectrum will serves little purpose. If you tune in a cw signal you can see the spread over at least 3 bins. We can take the samples and run another fft to get finer bin size but it will only be of cosmetic significance. - f
Pardon my ignorance on SDR processing.
It seems that when you select the narrower bandwidths the FFT bin frequency size stays the same.? IOW, say there are 200 bins at 25 kHz bandwidth, each bin represents 125 Hz. When you change to 2.5 kHz bandwidth, each bin still represents ?125 kHz, each bin just gets wider on the screen. Would it be possible to change the bin width to 12.5 Hz so that there is more resolution when you select a narrower bandwidth?
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73,
Mark, N8ME
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sBitx v2 Spectrum / Waterfall
Pardon my ignorance on SDR processing.
It seems that when you select the narrower bandwidths the FFT bin frequency size stays the same. ?IOW, say there are 200 bins at 25 kHz bandwidth, each bin represents 125 Hz. When you change to 2.5 kHz bandwidth, each bin still represents ?125 kHz, each bin just gets wider on the screen. Would it be possible to change the bin width to 12.5 Hz so that there is more resolution when you select a narrower bandwidth?
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73,
Mark, N8ME
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Re: Sbitx v2 Function Knob
Art,
ok, good to know that root-cause was found and you are waiting for replacement.
Hope that you will have V2 back in full order soon and you will enjoy it.
- P
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Re: Sbitx v2 Function Knob
Petr?
Yes did that also. The switch is faulty. Ashhar is going to have sales send a new pcb.?
Thanks for your suggestion.?
73
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On Apr 23, 2023, at 09:55, Petr Ourednik <indians@...> wrote:
?Art,
one more thing > did you tried to swap the flat ribbon cable (grey one) connecting the encoders pcb and RSPi?
You could isolate where the issue is...
-P
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Re: pictures and videos of sbitx v2
Hmm¡ that might be cool. ?Can you try both?
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Re: Sbitx v2 Function Knob
Art,
one more thing > did you tried to swap the flat ribbon cable (grey one) connecting the encoders pcb and RSPi?
You could isolate where the issue is...
-P
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Re: Sbitx v2 Function Knob
Art,
I know that maybe you all tried already but in case > it all looks like disconnected or not detected Vol encoder in V2.
As you confirmed on last vid that swapped encoders PCB from DE unit work it means that the rest of V2 is ok (happy to say)
so did you tried to re-heating the soldered pins of Vol encoder to avoid cold-joint on the PCB?
Also checking the tracks on PCB from encoder to socket could help.
Just 2c help trial...
- P
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Re: Sbitx v2 Function Knob
Ashhar
I removed the pcb with the two switches from my dev unit and plugged it into my V2. The vol level can now be adjusted.?
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On Apr 23, 2023, at 07:33, Art N2AJO <olson339@...> wrote:
? Ashhar
Attached?
On Apr 23, 2023, at 01:58, Ashhar Farhan <farhanbox@...> wrote:
? That seems unlikely, given that they are all given a good spin. Can I see a video ? On Sun, Apr 23, 2023, 11:14 AM HA3HZ < gyula@...> wrote: I would suspect a hardware error, connection contact, if there is no feedback.
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Gyula HA3HZ
<Video.mov> <Video_1.mov>
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Re: ptt ubitx v6 ext amplifier
#v6
I don't expect it does.? I think the manufacturer is rather generous(?) with his power output claims.
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Re: pictures and videos of sbitx v2
Good idea, I was thinking of a pseudo oscilloscope showint modulatio? in place of the spectrum display?
Hi Ashhar,
It¡¯s really minor but it would be nice if there was an easy to see indication of transmit while in digital mode.? The only indication is audio and FR sliders switch to SWR and Watts but you really have to look to see it.? On the original GUI, it was better because the waterfall indicated a relative bar which expanded as power was increased.? I do not see that same presentation in the web interface.
Is it possible to change the cyan background around the frequency display to red during transmit?
Just a suggestion, Scott
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Re: pictures and videos of sbitx v2
Hi Ashhar,
It¡¯s really minor but it would be nice if there was an easy to see indication of transmit while in digital mode. ?The only indication is audio and FR sliders switch to SWR and Watts but you really have to look to see it. ?On the original GUI, it was better because the waterfall indicated a relative bar which expanded as power was increased. ?I do not see that same presentation in the web interface.
Is it possible to change the cyan background around the frequency display to red during transmit?
Just a suggestion, Scott
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Re: Sbitx v2 Function Knob
Ashhar
Grist video trying to adjust vol leveli using the function button. Second video shows me using my keyboard to manually adjust the vol level. So believe the software is functioning correctly?
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On Apr 23, 2023, at 07:33, Art N2AJO <olson339@...> wrote:
? Ashhar
Attached?
On Apr 23, 2023, at 01:58, Ashhar Farhan <farhanbox@...> wrote:
? That seems unlikely, given that they are all given a good spin. Can I see a video ? On Sun, Apr 23, 2023, 11:14 AM HA3HZ < gyula@...> wrote: I would suspect a hardware error, connection contact, if there is no feedback.
--
Gyula HA3HZ
<Video.mov> <Video_1.mov>
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Re: Sbitx v2 Function Knob
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Show quoted text
On Apr 23, 2023, at 01:58, Ashhar Farhan <farhanbox@...> wrote:
? That seems unlikely, given that they are all given a good spin. Can I see a video ? On Sun, Apr 23, 2023, 11:14 AM HA3HZ < gyula@...> wrote: I would suspect a hardware error, connection contact, if there is no feedback.
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Gyula HA3HZ
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Re: ptt ubitx v6 ext amplifier
#v6
at 12-16V and 6-10A the PA cannot give 100W !!
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Unfortunately, I can't.? The amp is an XTD-PA100 (made in China),
which I purchased from ebay.? I've included the blub on it
although I don't know that It will be of any help.? Perhaps there
are others who have purchased the same item who have more
information.
?PA100 100w 3~30Mhz
Shortwave Power Amplifier HF Amplifier RF
w/Case????????????????????
Note:
This is a universal version that supports all radios. It
comes with no filters or trigger lines. You need to make the
trigger line by yourself. If you need a trigger line, please
contact us to purchase separately.
????????????????
Description:
- This product is a debugged finished product, directly
connected to the radio, the power supply can work, with its own
transceiver switching, the circuit is AB linear amplifier for
ssb ,cw, am, fm power amplification.
- Suitable for FT817 KX3/KN-Q10,KN850,KN990/?Xiegu X5105 G90S G1M
- Can be used as general wireless radio, short wave
transmission, RF drive? linear amplifier
Features:
- Frequency range: 3-30mhz
- Power supply voltage :12v-16v
- Current: 6-10 A
- Maximum input power: 10w
- Maximum output power: 100w
- Weight :240g
- Input and output interface£º SMA-K
- Amplifier gain: 10- 18DB
Package List£º
- 1 x 3~30Mhz 100w Shortwave Power Amplifier
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Re: ptt ubitx v6 ext amplifier
#v6
I have this schematic which is for a 70W amp.? I think it MAY be the same as for the 100W amp.? The only difference may be some component changes. 
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Re: ptt ubitx v6 ext amplifier
#v6
Unfortunately, I can't.? The amp is an XTD-PA100 (made in China), which I purchased from ebay.? I've included the blub on it although I don't know that It will be of any help.? Perhaps there are others who have purchased the same item who have more information.
?PA100 100w 3~30Mhz Shortwave Power Amplifier HF Amplifier RF w/Case????????????????????
Note: This is a universal version that supports all radios. It comes with no filters or trigger lines. You need to make the trigger line by yourself. If you need a trigger line, please contact us to purchase separately.
????????????????
Description:
- This product is a debugged finished product, directly connected to the radio, the power supply can work, with its own transceiver switching, the circuit is AB linear amplifier for ssb ,cw, am, fm power amplification.
- Suitable for FT817 KX3/KN-Q10,KN850,KN990/?Xiegu X5105 G90S G1M
- Can be used as general wireless radio, short wave transmission, RF drive? linear amplifier
Features:
- Frequency range: 3-30mhz
- Power supply voltage :12v-16v
- Current: 6-10 A
- Maximum input power: 10w
- Maximum output power: 100w
- Weight :240g
- Input and output interface£º SMA-K
- Amplifier gain: 10- 18DB
Package List£º
- 1 x 3~30Mhz 100w Shortwave Power Amplifier
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Re: ptt ubitx v6 ext amplifier
#v6
Can you send a schematic of the amp?
It seems I have the worst of both worlds.? I have a uBTIX ver 6 and the amplifier I purchased DOES NOT have an opto-coupler.? Since I'm completely at sea regarding construction techniques, could someone tell me if its possible to use an opto-coupler by installing it between C150/R150 and the output jack I installed on the rear of the uBTIX?
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Re: ptt ubitx v6 ext amplifier
#v6
It seems I have the worst of both worlds.? I have a uBTIX ver 6 and the amplifier I purchased DOES NOT have an opto-coupler.? Since I'm completely at sea regarding construction techniques, could someone tell me if its possible to use an opto-coupler by installing it between C150/R150 and the output jack I installed on the rear of the uBTIX?
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Re: Sbitx v2 Function Knob
That seems unlikely, given that they are all given a good spin. Can I see a video ?
On Sun, Apr 23, 2023, 11:14 AM HA3HZ < gyula@...> wrote: I would suspect a hardware error, connection contact, if there is no feedback.
--
Gyula HA3HZ
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Re: Sbitx v2 Function Knob
I would suspect a hardware error, connection contact, if there is no feedback.
--
Gyula HA3HZ
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Mark Erbaugh
Raj vu2zap
HA3HZ