Re: unboxing the ubitx v6
Evan:
The function can do away with the cascading if statement block several ways. You could use a switch/case statement block, but that still creates a jump table and redundant calls to digitalWrite(). See if this would work:
#define BAND15??? 0
#define BAND20??? 1
#define BAND40??? 2
#define BAND80??? 3
void setup() {
? Serial.begin(9600);
? setTXFilters_v5(BAND15);
}
void loop() {
? // put your main code here, to run repeatedly:
}
void setTXFilters_v5(int band)
{
? static int filterParameters[4][3] = {
??? {0, 0, 0},? // 15M
??? {1, 0, 0},? // 20M
??? {0, 1, 0},? // 40M
??? {0, 0, 1}?? // 80M
? };
? digitalWrite(TX_LPF_A, filterParameters[band][0]);
? digitalWrite(TX_LPF_B, filterParameters[band][1]);
? digitalWrite(TX_LPF_C, filterParameters[band][2]);
}
This version uses no cascading if statement block so it should execute slightly faster. I doubt that it will save any memory because of the static array I've added.
Jack, W8TEE
On Wednesday, January 6, 2021, 11:36:25 AM EST, Rafael Diniz <rafael@...> wrote:
Thanks a lot Evan!!
I'll set the arduido development environment here and test with
different filter settings. I'll create a fork of the firmware for playing.
Cheers,
Rafael
On 1/6/21 8:35 AM, Evan Hand wrote:
> On Tue, Jan 5, 2021 at 07:49 PM, Rafael Diniz wrote:
>
>? ? Btw, I noticed I get zero output on 6.9MHz, and full power on
>? ? 7100. Why?
>
> I believe it is due to this section of the v6.1 code where the low
> pass filter is selected:
>
> void setTXFilters_v5(unsigned long freq){
> ??
> ? if (freq > 21000000L){? // the default filter is with 35 MHz cut-off
> ? ? digitalWrite(TX_LPF_A, 0);
> ? ? digitalWrite(TX_LPF_B, 0);
> ? ? digitalWrite(TX_LPF_C, 0);
> ? }
> ? else if (freq >= 14000000L){ //thrown the KT1 relay on, the 30 MHz
> LPF is bypassed and the 14-18 MHz LPF is allowd to go through
> ? ? digitalWrite(TX_LPF_A, 1);
> ? ? digitalWrite(TX_LPF_B, 0);
> ? ? digitalWrite(TX_LPF_C, 0);
> ? }
> ? else if (freq > 7000000L){
> ? ? digitalWrite(TX_LPF_A, 0);
> ? ? digitalWrite(TX_LPF_B, 1);
> ? ? digitalWrite(TX_LPF_C, 0);? ??
> ? }
> ? else {
> ? ? digitalWrite(TX_LPF_A, 0);
> ? ? digitalWrite(TX_LPF_B, 0);
> ? ? digitalWrite(TX_LPF_C, 1);? ??
> ? }
> }
>
> Note that there is a small bug in the above, as the 60/80 meter filter
> will be selected if the frequency is set exactly at 7MHz.? Not sure
> that anyone would run that close to the band edge, but it does mean
> that taking any measurements you would want to be at least a few hertz
> above 7MHz.? I would have made the compare >=.? The same is true for
> 15m (21MHz).
>
> You need to also take into account the sidetone offset when testing
> CW, as the actual carrier is shifted by the sidetone value.? Since I
> do not have a v6 I am not sure how the CWL or CWU mode is handled.?
> All of my uBITX have been converted to KD8CEC firmware.? To be safe,
> the best bet is to set a test frequency of 1kHz or more above the
> 21MHz and 7MHz filter selection points.
>
> 73
> Evan
> AC9TU
>
--
Jack, W8TEE
|
Re: Optimize for 5 - 6 MHz range
So lets say, when operating at 6.1 MHz with the 40m band filter setting:
? ? TX_LPF_A = 0
? ? TX_LPF_B = 1
??? TX_LPF_C = 0 ?
The first harmonic will not be attenuated, so it might be good to add
another low pass filter, or modify the LPF_B, right? We'll use
auto-certification, as there is a special treatment for telecom in
Brazilian Amazon rain-forest (and many other parts of the world, too),
where there is no telecom infrastructure at all in many parts of the region.
Rafael
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Show quoted text
On 1/6/21 1:35 PM, Curt via groups.io wrote: I would check regulations in the intended country of use, in case
transcivers must be approved for that use. Possibly the existing low
pass filter may not be compliant for harmonics. While it may be
possible to do the component modification whether it can be used might
involve some expensive certified lab testing.
Curt
|
Re: unboxing the ubitx v6
Thanks a lot Evan!!
I'll set the arduido development environment here and test with
different filter settings. I'll create a fork of the firmware for playing.
Cheers,
Rafael
toggle quoted message
Show quoted text
On 1/6/21 8:35 AM, Evan Hand wrote: On Tue, Jan 5, 2021 at 07:49 PM, Rafael Diniz wrote:
Btw, I noticed I get zero output on 6.9MHz, and full power on
7100. Why?
I believe it is due to this section of the v6.1 code where the low
pass filter is selected:
void setTXFilters_v5(unsigned long freq){
??
? if (freq > 21000000L){? // the default filter is with 35 MHz cut-off
? ? digitalWrite(TX_LPF_A, 0);
? ? digitalWrite(TX_LPF_B, 0);
? ? digitalWrite(TX_LPF_C, 0);
? }
? else if (freq >= 14000000L){ //thrown the KT1 relay on, the 30 MHz
LPF is bypassed and the 14-18 MHz LPF is allowd to go through
? ? digitalWrite(TX_LPF_A, 1);
? ? digitalWrite(TX_LPF_B, 0);
? ? digitalWrite(TX_LPF_C, 0);
? }
? else if (freq > 7000000L){
? ? digitalWrite(TX_LPF_A, 0);
? ? digitalWrite(TX_LPF_B, 1);
? ? digitalWrite(TX_LPF_C, 0);? ??
? }
? else {
? ? digitalWrite(TX_LPF_A, 0);
? ? digitalWrite(TX_LPF_B, 0);
? ? digitalWrite(TX_LPF_C, 1);? ??
? }
}
Note that there is a small bug in the above, as the 60/80 meter filter
will be selected if the frequency is set exactly at 7MHz.? Not sure
that anyone would run that close to the band edge, but it does mean
that taking any measurements you would want to be at least a few hertz
above 7MHz.? I would have made the compare >=.? The same is true for
15m (21MHz).
You need to also take into account the sidetone offset when testing
CW, as the actual carrier is shifted by the sidetone value.? Since I
do not have a v6 I am not sure how the CWL or CWU mode is handled.?
All of my uBITX have been converted to KD8CEC firmware.? To be safe,
the best bet is to set a test frequency of 1kHz or more above the
21MHz and 7MHz filter selection points.
73
Evan
AC9TU
|
Re: Optimize for 5 - 6 MHz range
I would check regulations in the intended country of use, in case transcivers must be approved for that use. Possibly the existing low pass filter may not be compliant for harmonics. While it may be possible to do the component modification whether it can be used might involve some expensive certified lab testing.
Curt
|
FOR SALE Ubitx ver 3 in nice metal case
Gm group
i bought this as a unfinished kit.
I put it together fired it up, upgraded it to
the CEC software.
VERSION 3?
It has the real nice blue metal case with several?
adaptor boards for IO ports.
It works as it should.
it needs to be calibrated, especially on band pass.
I have only tried it on CW so it does NOT have?
a mic.
I will take 100.00 plus shipping in the US.
shipping will be around 20.00 or 25.00 because?
of the size??
it would be a nice candidate for the ver 6 upgrade?
board, lots of Room!
pics on request to my email.
72
Johnny AC?BQ?
|
Re: unboxing the ubitx v6
Hi Rafael, my basic kit is on the way as well and i'm also researching housing options.
I have a 3d printer and i'm planning to print what's missing of the enclosure.
Would you kindly measure the two plexiglass parts for me? So that i can see if they fit in any 3d printed model.
Thank You
|
Re: How long does shipping take?
Next DHL round? E-38911 Frontera.... Wikipedia shows:  But DHL ask: Pse supply the country and the ZIP Code ...its for cry and laugth... ? --- 73 de Erich
HB9FIH
HS0ZLS
|
Re: unboxing the ubitx v6
On Tue, Jan 5, 2021 at 07:49 PM, Rafael Diniz wrote:
Btw, I noticed I get zero output on 6.9MHz, and full power on 7100. Why?
I believe it is due to this section of the v6.1 code where the low pass filter is selected:
void setTXFilters_v5(unsigned long freq){
??
? if (freq > 21000000L){? // the default filter is with 35 MHz cut-off
? ? digitalWrite(TX_LPF_A, 0);
? ? digitalWrite(TX_LPF_B, 0);
? ? digitalWrite(TX_LPF_C, 0);
? }
? else if (freq >= 14000000L){ //thrown the KT1 relay on, the 30 MHz LPF is bypassed and the 14-18 MHz LPF is allowd to go through
? ? digitalWrite(TX_LPF_A, 1);
? ? digitalWrite(TX_LPF_B, 0);
? ? digitalWrite(TX_LPF_C, 0);
? }
? else if (freq > 7000000L){
? ? digitalWrite(TX_LPF_A, 0);
? ? digitalWrite(TX_LPF_B, 1);
? ? digitalWrite(TX_LPF_C, 0);? ??
? }
? else {
? ? digitalWrite(TX_LPF_A, 0);
? ? digitalWrite(TX_LPF_B, 0);
? ? digitalWrite(TX_LPF_C, 1);? ??
? }
}
Note that there is a small bug in the above, as the 60/80 meter filter will be selected if the frequency is set exactly at 7MHz.? Not sure that anyone would run that close to the band edge, but it does mean that taking any measurements you would want to be at least a few hertz above 7MHz.? I would have made the compare >=.? The same is true for 15m (21MHz).
You need to also take into account the sidetone offset when testing CW, as the actual carrier is shifted by the sidetone value.? Since I do not have a v6 I am not sure how the CWL or CWU mode is handled.? All of my uBITX have been converted to KD8CEC firmware.? To be safe, the best bet is to set a test frequency of 1kHz or more above the 21MHz and 7MHz filter selection points.
73
Evan
AC9TU
|
Re: unboxing the ubitx v6
Hi,
6.9MHz is outside the ham bands.
|
Optimize for 5 - 6 MHz range
Already read it is because of the LPF in the output. Has anyone already
modified the ubitx v6 to optimize for the 5 to 6MHz range for civil HF use?
Rafael
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On 1/5/21 10:49 PM, Rafael Diniz wrote: Thanks Rafael!
Btw, I noticed I get zero output on 6.9MHz, and full power on 7100. Why?
Rafael PU2UIT
On 1/5/21 10:23 PM, rafaelgcpp@... wrote:
For radio audio out to pc line in, a stereo cable will do. On the
other way around use two stereo plugs but leave the mid section of the
plug disconnected. The mid section on the mic input is the PTT, hence
a mono plug will put the radio in tx continuously. Using a regular
stereo cable can lead to erratic behavior, as the radio will
understand some low voltage as PTT pressed.
|
group, I need the parts list for the transmission step, at least uBITX v4. I need to order IRF510, LM78L05ACZ (U2 voltage regulator), 10K potentiometer (RV2 and RV3), which I intend to order from Mouser. 73's PY2PVB
Rubens Kamimura T¨¦cnico em Eletr?nica e Eletrot¨¦cnica CFT/CRT-SP: 80254934820 Cel. +55 (18) 9-9819-2225 WhatsApp
"Power from the 16db 2n3904 based driver stages falls off as the frequency goes up.
That may well be more of a factor than the IRF510's in your "much less on the higher bands".
I concur with Jerry and did follow Allison's lead that band performance upstairs can be improved by swapping 2N2222 cans for the original pre driver & driver 3904's with resistor halving as suggested.??
I've done that on one board and have been happy. On a separate board, I put in one 2N5109 for each pair of 3904's. That works especially well with 20v on the finals.? I'm getting around 20-25W SSB on 20 meters, and maybe 15 -20 on 80 & 40.??
Ted K3RTA?
|
Re: unboxing the ubitx v6
Thanks Rafael!
Btw, I noticed I get zero output on 6.9MHz, and full power on 7100. Why?
Rafael PU2UIT
toggle quoted message
Show quoted text
On 1/5/21 10:23 PM, rafaelgcpp@... wrote:
For radio audio out to pc line in, a stereo cable will do. On the
other way around use two stereo plugs but leave the mid section of the
plug disconnected. The mid section on the mic input is the PTT, hence
a mono plug will put the radio in tx continuously. Using a regular
stereo cable can lead to erratic behavior, as the radio will
understand some low voltage as PTT pressed.
|
Re: unboxing the ubitx v6
Rafael,
For radio audio out to pc line in, a stereo cable will do. On the other way around use two stereo plugs but leave the mid section of the plug disconnected. The mid section on the mic input is the PTT, hence a mono plug will put the radio in tx continuously. Using a regular stereo cable can lead to erratic behavior, as the radio will understand some low voltage as PTT pressed.
73 de PU1OWL
Rafael Pinto
|
Re: unboxing the ubitx v6
ok. I'm on air on the 40m band, the radio is wonderful
for data modes, apart of the PTT I can do over serial, for the audio
path, which cables should I use to connect to line-in and line out of a
sound card? Normal mono or stereo jacks, or something else?
Cheers,
Rafael
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Show quoted text
On 1/5/21 8:28 PM, Rafael Diniz wrote: Hi there,
I bougth a ubitx v6 basic kit, and I'm wondering what to do with the two
parts cut with the shape of the ubitx? It there a "case guide" on how
can I get my ubitx in a nice casing?
And btw, in the 12v jack, the positive is the center, and negative the
outer side of the jack, right?
Yay! I'll be on air soon.
Rafael PU2UIT
|
Hi there,
I bougth a ubitx v6 basic kit, and I'm wondering what to do with the two
parts cut with the shape of the ubitx? It there a "case guide" on how
can I get my ubitx in a nice casing?
And btw, in the 12v jack, the positive is the center, and negative the
outer side of the jack, right?
Yay! I'll be on air soon.
Rafael PU2UIT
|
|
|
Anyone interested in a pair of MRF101 power FETs. I have a pair of them, never used and in the original sealed packages from Mouser. One is the AN the other the BN version. Asking $40 for the pair shipping included to conus. I changed my plans for these devices, so they are surplus to my needs. Contact me off the group.io
|
On Tue, Jan 5, 2021 at 01:31 PM, Mark Erbaugh wrote:
Does Serial.available work?
Yes Serial.available and everything else I have tried works fine. Apparently serialEvent is going away.....deprecated since it is basically irrelevant....? see this from Arduino forum central Dean KK4DAS
|
Jon, I will assume that the path in your first post is correct.? Then the window should contain: D:\uBitx V5\uBITX_CEC_V1.200\uBITXV5\UBITXV5_CEC_V1.200_NX.hex You can check this by clicking on the box with the ellipsis (three periods) and verify that the file is found. For my file locations the window looks like this:  You will need to set the com port to match the one assigned by your setup, and set the baud rate to 38400.? I am not at my QTH, so cannot show you the actual settings for my computer. If you do change out the Nano, then you will need to recalibrate the uBITX.? The calibrations are stored in the EEPROM of the Nano.? Here is a video of how to do a stock calibration by Ashhar Farhan: You follow the same general steps with the KD8CEC software, the difference will be how to change the calibrations.? For me, I use the "yellow box" menu that comes up when you press the encoder.? You then need to go to the menu selection for "SETUP" and turn it on.? Press the encoder again, and then the BFO and Calibration settings are now listed as choices.? go through the three steps: 1 - Adjust the BFO to the lower side of the audio range (the 300 H line) to ensure that the lower frequency beats come through. 2 - Calibrate the rig to a known AM station (One of the WWV at 5MHz, 0r 10MHz works for me). 3 - Go back and readjust the BFO to center between the 300 and 3000 Hz bars. Between each setting you will need to press the PTT or the Encoder to save the stting, then power down the rig for 10+ seconds and restart to ensure the setting took.? Depending on the Nextion screen selected, the settings can be read on one of the screens.? That is a good way to verify that your change made it to the Nano. There is also a Memory Manager program that works with the KD8CEC firmware to save and restore the settings value. Hope this helps. 73 Evan AC9TU
|
On Tue, Jan 5, 2021 at 01:03 PM, Gary Anderson wrote:
You can use a programmer to load the sketch.
Hi Gary - Thanks.? I may give that a try.? I have used and Arduino ISP to restore a bootloader before so I should be able to figure it out.? It will interesting to see. Dean
|
HB9FIH
Rafael Pinto [PU1OWL]
