Re: radio will transmit CW but not voice
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It isn¡¯t clear to me the procedure to get the radio tuned.? Since I have made it to that screen by holding in the select button and turning the radio on, what do I do from there.? Am I supposed to tune to WWV before doing that?? I would suppose I must need to do something on that configuration screen in addition to going through the BFO calibration.? I have googled lots and I cannot find anything that tells me what to do where I am looking for a tone at 10,000 kHz.? As I wrote previously if I turn the dial to around 65,000 and further there are several tones some of which overlap.? I just don¡¯t know what I am supposed to do.
?
Thanks,
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Split power for PA on uBITX v6
Has anyone spotted an easy way to split the v6 power amp (PA) supply from the rest of the 12 VDC circuit?? That was easy to do in my uBITX v3, at the 3-pin power connector.? But the v6 board has everything fed by a common DC input jack.? I suspect that there is a circuit trace I can cut somewhere, but I haven't figured out where.
A related question is the impact on spectral purity and other performance aspects if I feed the PA with 24 VDC instead of 12 VDC.? If jacking up the PA voltage would cause problems elsewhere, I could conceivably give up on the idea.
Thanks,
? Mark (AE7TO)
P.S.? I hope?Ashhar, his family, and uBITX team are all staying safe and healthy. These are difficult times.
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Re: radio will transmit CW but not voice
Andrew,
My v6 uBITX is not available at this time, so I can not verify. ?I believe it is part of the factory setup program and may be transmitting 10,000MHz signal or it could be that they have a 10MHz reference that they are feeding into the uBITX. ?
I only use the power up setup to adjust the touchscreen. ?I then power off the rig and use the long press of the encoder to get to the other calibration screens as Ashhar Farhan describes in his calibration video.?
If you have adjusted this value and saved it by pressing the encoder, the I would suggest you follow the instructions in his video to recalibrate your v6.?
73
Evan
AC9TU
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Gerard,
The INIT_USB_FREQ is an initial value that is used if the EEPROM value has not been set (0 value). ?I agree with Raj that 11055.5kHz would be a better starting point. ?I also agree that you would need to ask Dr Lee as to why he?
chose that value,
73
Evan
AC9TU
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Re: radio will transmit CW but not voice
It isn¡¯t clear to me the procedure to get the radio tuned.? Since I have made it to that screen by holding in the select button and turning the radio on, what do I do from there.? Am I supposed to tune to WWV before doing that?? I would suppose I must need to do something on that configuration screen in addition to going through the BFO calibration.? I have googled lots and I cannot find anything that tells me what to do where I am looking for a tone at 10,000 kHz.? As I wrote previously if I turn the dial to around 65,000 and further there are several tones some of which overlap.? I just don¡¯t know what I am supposed to do.
?
Thanks,
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At 02/05/2021, you wrote: Raj and all
I do not understand why this value on version 5 of KD8CEC for USB. You will have to ask the author! I am not familiar but there may be a reason. otherwise 12000.0 - 3.5 Khz = 11996.5 and 11059.0 -3.5 KHz = 11555.5 Raj
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Raj and all
I do not understand why this value on version 5 of KD8CEC for USB.The values should be close to that of the SSB filter. (11059000)
on the pgm 11056500
My mount works very well with version 234 of KD8CEC. There the USB value is 11996500, so very close to the SSB filter at 12MHZ
#define INIT_USB_FREQ? ?(11996500l) I can try to change it and recompile it cdt
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The V6 should be 11,055.5 as I checked with multiple V5 boards. Why
HFSignals leaves
it at 11,059.2 is a mystery to me.
Raj
At 02/05/2021, you wrote:
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hello,
Without being a specialist, I looked at the source codes of KD8CEC and
that of the V6.
Kd8CEC
?#define SECOND_OSC_USB (56058700l)
? #define SECOND_OSC_LSB (33945800l)
?
? //Not used, Just comment (Default)
? #define INIT_USB_FREQ?? (11056500l)
?
V6 Ubitx
#define INIT_USB_FREQ?? (11059200l)
unsigned long vfoA=7150000L, vfoB=14200000L, sideTone=800,
usbCarrier;
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hello, Without being a specialist, I looked at the source codes of KD8CEC and that of the V6. Can you explain the USB frequency difference between the KD8CEC software and the V6. It¡¯s not huge, but it¡¯s about 3KHZ.Same for BFO values, but I¡¯m not so sure.So, if I want to change the USB value in the KD8CEC program and set it to 11059200l as in the V6, how much do I have to change for the SECOND_OSC_USB and SECOND_OSC_LSB values?Maybe this could fix my interference issues?
Kd8CEC
?#define SECOND_OSC_USB (56058700l)
? #define SECOND_OSC_LSB (33945800l)?
?
? //Not used, Just comment (Default)
? #define INIT_USB_FREQ? ?(11056500l)
?
V6 Ubitx
#define INIT_USB_FREQ? ?(11059200l)
unsigned long vfoA=7150000L, vfoB=14200000L, sideTone=800, usbCarrier;
?
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The old phonestack/BITX20 URL is no longer valid.? I have changed that reference
which was at the bottom of each email to show "" which is
where the old web site has been moved to.
Arv _._
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The old phonestack/BITX20 URL is no longer valid.? I have changed that reference
which was at the bottom of each email to show "" which is
where the old web site has been moved to.
Arv _._
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hello,
I think I have found, but I will almost give my tongue to the cat!
If I load the Ubitx version of KD8CEC for model 234 with Smeter or not, I have no more problems.
Whether I take the one for V5 with Smeter or not the noise come back!!!
you will tell me, it is not the same SSB filter (I put 11059mhz quartz), yes, but the anomalies are due to frequency interactions.
look at the posts I had with Evan, we discovered that there was still a residual frequency of 12/15 kilohetz in the output of the SSB filter with version 234 of KD8CEC
I attach the used versions that fit into the Arduino with Xloader
Some Ideas?
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I have the HS code for toroids. Thanks to everyone for replying back . The HS code is 85051110? for? Ferrite cores . Best regards
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Christian,
For my tests the screen Nextion is completly deconnected. i know it can make some noise but is't? completly different in my case.
I have gained experience on this type of assembly
The noise comme from Q70
I isolated Q70 which is a SMD model on my construction.
it oscillates alone at 40 MHZ!!! so therefore parasitizes the upper stages by modulation effect
I changed it, it¡¯s the same.
So I will do a test with a good old 2N3906 as on my first proto.
cdt
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Re: BITX 4 Band with Linear Amplifier and AGC
Thank you for the kind reply and data. Greatly appreciated.?
There are several bom's for the bitx20. So i am trying to make sure i use the right one to order parts for the rest of the rig.
Thank you!!! mike
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Hallo,
do you use a Nextion Display?
73, Chris!
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Re: BITX40 and Data FT8/JT65 et al.
Zvika,
What value did you use for the DC block capacitors?
Thanks,
Stephen, KO4CVU
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Re: BITX 4 Band with Linear Amplifier and AGC
Attaching the required files
On Sat, May 1, 2021 at 10:20 AM Ashhar Farhan < farhanbox@...> wrote: Can you post us the schematic? The thing to do would be to draw them out in ltspice and measure it for yourself. I am sure someone here can set it up for you
On Sat 1 May, 2021, 9:52 AM Kj7OCO, < mcobb@...> wrote: Newbie here.....i bought some bitx 4 band boards from pcbway......Mr.?Wahyu Hidayanto says the board is essentially a bitx20 with of course some on-board band pass filters.?
I was looking for the BOM for this board..........or assume as Mr. Hidayanto says...........use the bitx20 BOM and the:
80M
L1 = L2 = 2.2uH
L3 = 4.7uH
C1 = C2 = 1.5nF
C3 = 680pF
?
40M
L1 = L2 = 1uH
L3 = 2.2uH
C1 = C2 = 820pF
C3 = 390pF
?
20M / 30M
L1 = L2 = 0.47uH
L3 = 1uH
C1 = C2 = 390pF
C3 = 180pF
?
15M / 17M / 10M
L1 = L2 = 0.33uH
L3 = 0.68uH
C1 = C2 = 180pF
C3 = 82pF
I assume i am on the right path?
How anyone built one of these?
Thank you for putting up with? fast learning newbie.
mike
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Re: BITX 4 Band with Linear Amplifier and AGC
Can you post us the schematic? The thing to do would be to draw them out in ltspice and measure it for yourself. I am sure someone here can set it up for you
On Sat 1 May, 2021, 9:52 AM Kj7OCO, < mcobb@...> wrote: Newbie here.....i bought some bitx 4 band boards from pcbway......Mr.?Wahyu Hidayanto says the board is essentially a bitx20 with of course some on-board band pass filters.?
I was looking for the BOM for this board..........or assume as Mr. Hidayanto says...........use the bitx20 BOM and the:
80M
L1 = L2 = 2.2uH
L3 = 4.7uH
C1 = C2 = 1.5nF
C3 = 680pF
?
40M
L1 = L2 = 1uH
L3 = 2.2uH
C1 = C2 = 820pF
C3 = 390pF
?
20M / 30M
L1 = L2 = 0.47uH
L3 = 1uH
C1 = C2 = 390pF
C3 = 180pF
?
15M / 17M / 10M
L1 = L2 = 0.33uH
L3 = 0.68uH
C1 = C2 = 180pF
C3 = 82pF
I assume i am on the right path?
How anyone built one of these?
Thank you for putting up with? fast learning newbie.
mike
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Raj vu2zap
Gerard
Sunil Lakhani
Christian Schwabedal
Satish Chandorkar
