My uBITX had been working just ok for it and I went to turn it on this morning and I'm stuck on 20 Meters. I'm using a 2.8" Nextion display. I try to use the band up and band down buttons and the do not work. I try direct entry and that does not work. Not sure what else to try -- '72
Aaron K5ATG
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Thanks for the invite guys. My sBitx v2 came on Wednesday, and superb at the moment. Just a problem with Morse decoding, it worked great at first, now I can't seem to see any at all??? Message not delivered | | There was a problem delivering your message to?[email protected]. Contact the remote server administrator for details. |
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When I look at the data sheet for the IRFZ24, the typical Ton/Toff
delay times add up to about 40 nsec, which I think translates
roughly to about 25 MHz.? That seems to me to be a bit marginal.? I
assume that the factory outgoing tests assure that shipped units
meet the 40 watt power spec on all bands, but since there is no
maximum Ton/Toff delay times spec'd by the manufacturer I wonder if
the folks who have had to replace their PA FETS might get units that
don't actually give full output.
Or is my math (or understanding) wrong?
Thanks for any clarification.
73 es take care,
Dave?? AB7E
On 6/15/2023 11:23 AM, Shirley Dulcey
KE1L wrote:
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The IRFZ24 transistors are spares for the final
output stage, just in case you damage them. Unless something
goes wrong you won't need them.
On Thu, Jun 15, 2023 at
2:09?PM Randy N3PUT < randy@...>
wrote:
I
just received my sBitx-v2 ! There is a bag of parts, power
cord, 3.5mm jack and two transistors...I think? They are
listed in the parts list as IRFZ24N
What are they for? Be nice I'm new.
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Re: sBitx Issue After Upgrade
#sBitx
Works great now. Thanks.?
--
Bob AA4FJ
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The IRFZ24 transistors are spares for the final output stage, just in case you damage them. Unless something goes wrong you won't need them.
On Thu, Jun 15, 2023 at 2:09?PM Randy N3PUT < randy@...> wrote: I just received my sBitx-v2 ! There is a bag of parts, power cord, 3.5mm jack and two transistors...I think? They are listed in the parts list as IRFZ24N
What are they for? Be nice I'm new.
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I just received my sBitx-v2 ! There is a bag of parts, power cord, 3.5mm jack and two transistors...I think? They are listed in the parts list as IRFZ24N
What are they for? Be nice I'm new.
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Okay, I did it! It turned out great, about 30 watts at 100% drive for most bands except 12 and 10 meters are about 20 but that¡¯s perfect for me. Thanks for these cool radios.
Joel
N6ALT
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Re: uBitx V6 power connector
I don't know what the original connectors are or if these will be "more reliable" but the price is right and they are sold as sets:? ?
Many similar online options to choose from. I have replaced a couple of my original connectors with "connector sets" like these.? Can't remember which eBay vendor I got mine from but using the matching parts has worked fine for me. Good luck. Bob WB8BEL
From: "Ford Peterson" <ford@...> To: "BITX20" < [email protected]> Sent: Thursday, June 15, 2023 9:42:28 AM Subject: [BITX20] uBitx V6 power connector
The power connector has proven to be unreliable.? Readily available 5.5mm x 2.5mm connectors have too large a center pin and although the power works, it is unreliable and intermittent if unless you take great care to keep it aligned.?
Special order 5.5mm x 2.1mm standard connector is also unreliable and I can visually see that the center pin on the stock V6 is smaller than 2.1mm.
?
What is this connector?? Can somebody provide the technical spec?? Better yet, can somebody describe the connector that I can replace it with a more reliable design?
?
Thanks
?
Ford-N0FP
?
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Hi Farhan,
Okay I'll bite the bullet and give it a try. Thanks again.
Joel
N6ALT
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Joel, The way to do that is to just edit the text file hw_settings.ini. You don't need to know programming. In this file, there is one section for each band and for each band, there is an entry called scale. Bump up the scale by 20%, save the file and restart the sbitx, test the power output, you will have to tweak each band similarly. The txcal does this automatically as v2 monitors the power output. - f
On Thu, Jun 15, 2023, 7:13 PM Joel Caulkins/N6ALT < caulktel@...> wrote: On Sat, Jun 10, 2023 at 12:28 PM, Joel Caulkins/N6ALT wrote:
i am noticing is the power level is not consistent,
I am no longer having this problem on my DE after Farhan's latest update, 6/14/23, now power output seems very stable. I would still prefer a easier way to calibrate the power output for the DE similar to TXcal. Ultimately I would like both my V2 and my DE to have the same power outputs at selected drive levels. I realize I am at the mercy of those who can code, (I cannot), so thanks to all that contribute their skills, it keeps getting better.
Joel
N6ALT
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On Sat, Jun 10, 2023 at 12:28 PM, Joel Caulkins/N6ALT wrote:
i am noticing is the power level is not consistent,
I am no longer having this problem on my DE after Farhan's latest update, 6/14/23, now power output seems very stable. I would still prefer a easier way to calibrate the power output for the DE similar to TXcal. Ultimately I would like both my V2 and my DE to have the same power outputs at selected drive levels. I realize I am at the mercy of those who can code, (I cannot), so thanks to all that contribute their skills, it keeps getting better. Joel N6ALT
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The power connector has proven to be unreliable.? Readily available 5.5mm x 2.5mm connectors have too large a center pin and although the power works, it is unreliable and intermittent if unless you take great care to keep it aligned.?
Special order 5.5mm x 2.1mm standard connector is also unreliable and I can visually see that the center pin on the stock V6 is smaller than 2.1mm.
?
What is this connector?? Can somebody provide the technical spec?? Better yet, can somebody describe the connector that I can replace it with a more reliable design?
?
Thanks
?
Ford-N0FP
?
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Re: Try CEC V2 Beta without risking your currently running V1.2 system...
For Nextion:
Nano3_CECV2_R56_Nextion_LocalS.hex
For 16x2 LCD:
Nano3_CECV2_R56_LCD1602P_LocalS.hex
All at:
73
Mark
-- AJ6CU KD8CEC 2.0, Nextion Screens,? and open source uBITX Raduino boards for Arduino IOT, BLE, RP2040, Teensy 4.0, and Raspberry Pi Pico https://github.com/aj6cu
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sBITX V2 serial # 001 Current Status and question
#sbitx_v2
Hi all,?
After resolving my update woes (thanks Art N2AJO !!) I feel things are pretty stable.
I know that the rig should be capable of upwards of 40 Watts on the lower bands. I'm not seeing that at 100% drive.
Here is what I'm seeing, which I'm happy with, but would like to know if I need to tweak anything or look for a problem:
(Into a fairly resonant antenna on most bands but tuned to close to 1:1)
BAND? ? ? ? ? WATTS
80? ? ? ? ? ? ? ? ?15
40? ? ? ? ? ? ? ? ?18
30? ? ? ? ? ? ? ? ?20
20? ? ? ? ? ? ? ? ?21
17? ? ? ? ? ? ? ? ?12
15? ? ? ? ? ? ? ? ?12
12? ? ? ? ? ? ? ? ?10
10? ? ? ? ? ? ? ? ?11
I would say accuracy is + or - 2 Watts with this setup.
Sorry, I have misplaced my dummy load.
Anyway, is there anything I should be doing or looking at.? Otherwise, I'm enjoying the rig.
--Neil, W2NDG
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What programing language is being used for the development of the sBitx v1 and v2?
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Re: Try CEC V2 Beta without risking your currently running V1.2 system...
Hi, which is the correct files for ubitx V6?? Thanks.? Andrea? Inviata dal mio Xiaomi Mi 11 Lite NC.
Success!? I found the correct file I need (for uBitx V6) and downloaded it once again.? This time it uploaded to the nano? right away.? Tomorrow I will stick the new nano in the radio.? Thanks for all the suggestions and help!
73,
Jim
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Re: sBitx Issue After Upgrade
#sBitx
If you remember, I had reported self oscillations in the PA for a few microseconds at TX to RX and RX to TX transitions the PA as well as T/R switch are both switch on, creating a feedback loop. This was causing harmful self oscillations. The way to break this was to break the feedbacks loop, we are switching off the LPFs during the transitions. In the previous commit, I had skippee turning on the LPFs. This didn't matter in the v2 where the tr switch is connected on the antenna side of the LPFs, the DE's tr switch is on the PA side of the LPFs. To see what has changed between two updates, you can first list the commits with "git log", and then try "git diff check1 check2" where check1 and check2 are the first few letters of the checksums of the commits listed by git log. - f
Hi Ashhar,
That worked.? The radio changes between transmit and receive properly.? Thank you.
Where was the problem?? Something controlled by CAT?? Just curious.
Thanks again, Scott
?
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Re: sBitx Issue After Upgrade
#sBitx
Hi Ashhar,
That worked. ?The radio changes between transmit and receive properly. ?Thank you.
Where was the problem? ?Something controlled by CAT? ?Just curious.
Thanks again, Scott
?
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Aaron K5ATG
Shirley Dulcey KE1L
Joel Caulkins/N6ALT
Neil Goldstein
IK0XBC