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The old phonestack/BITX20 URL is no longer valid.?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The old phonestack/BITX20 URL is no longer valid.?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
|
BITX 4 Band with Linear Amplifier and AGC
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: radio will transmit CW but not voice
Hi,
I think you may find it easiest to use the firmware that has the "memory manager" software.? That way you can easily enter the default VFO and BFO calibration numbers, and then have a starting place to make later adjustments.
Unfortunately, I can't remember which firmware uses that software.? But I'm sure many here can help with that.
73,?? Mark
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Re: BITX40 and Data FT8/JT65 et al.
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Re: radio will transmit CW but not voice
No.? All the software you need is that provided by HF Signals.?
This may be different if you are using some other software than that provided
by HF Signals.? Some systems do provide separate EEProm data storage
that is not managed by the operating system but? is necessary for
normal operation.? For these there are several EEProm management
software packages that can edit what is stored in EEProm, or you can
simply write your own by following examples for Arduino coding.
Arv _._
By updating the EEPROM have I made irreparable changes?
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Re: radio will transmit CW but not voice
Most any audio amp that is capable of driving headphones or a speaker
can be used to trace audio through the uBITX circuitry.? Use a 0.1 mfd capacitor
as a probe to isolate the amplifier from DC.? Activate the PTT (Push-to-talk)
on your microphone and follow audio from the microphone, through the mike
amplifier in the uBITX, and on to the balanced modulator.? Audio at the mixer will
be clipped or distorted because of the mixer diodes.? This is normal.?
Add a diode to your external audio amplifier to monitor RF points.? This too
will sound distorted because you are using an AM detector to monitor DSB
and SSB, but it will tell you if you have modulation, or no modulation.?
If you do not have a suitable audio amplifier for audio signal tracing, one can
be easily built using an op-amp and a PP (Pull-Push) emitter follower using
one 2N3904 and one 2N3906.?
Arv
_._
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Raj vu2zap
Gerard
Sunil Lakhani
Christian Schwabedal
Satish Chandorkar
