DR. J Please point me to the screen used for the board you handed out at the ham fest / I need the exact 3.5 board .
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need a replacement vfo for the BITX40
well after updateign firmware as stated before I lost 2 vfo? boards . so what I neeed is if anyone is not using thier vfo and moved over to a differaant vfo thay would be will to part with the original vfo ?
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Dave,
this is because semi QSK is ON.
Press the CW key down to automatically switch to CW,
Press PTT to automatically switch to SSB.
This behaviour will be disabled when you set semi QSK to OFF.
73 Allard PE1NWL
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On Wed, January 24, 2018 17:23, DaveC wrote: Hi all
Just completed the mods and installed V2.03 of the firmware on my BITX40,
a vast improvement over the original firmware and it's working well.
I only have one problem. When I first switched it on I could only get LSB
and USB when changing modes. When I keyed up the TX it switched to CWL and
now I can only get
CWL and CWU on the mode function.
Anyone have any ideas or a solution for it.
Dave G8PGO
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On Wed, Jan 24, 2018 at 08:09 am, Doug W wrote:
both have a .33 radius on the corners
On the panel it comes with that's more like 3 or 4.
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Re: Almost all of the firmware has been modified to fix known bugs and enhance CAT communications.
I ran across this video on YouTube last night, interesting work you are doing there. I am (im)patiently awaiting my uBITX with the same goal of creating a self-contained JT9/FT8 rig. Have you considered adding a GPS module to the Raspberry Pi for time synchronization "in the field"?
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Re: More digital lines on the Raduino..
With an I2C expander, the TX_A, TX_B, TX_C and CW_TONE lines could be implemented freeing up 4 digital I/O lines.
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Hello, I am very interested in purchasing one of these! Somebody here from Latin America that can give me some advice about the delivery in your countries? Should I opt for the DHL delivery? Thanks in advance for your reply! 73 de OA4CKN.
El 24 ene. 2018 11:00, "bill richardson" < ng1p.bill@...> escribió: I ordered mine on 15 December.. I have been told (yesterday)that in my case it should ship within the next two days. Sent from my iPhone there was a problem of no toroids, but they received some on the 1-13-2018
the Ubix should be shipped by the end of this month.
that's what they told me.
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Re: Oscilloscope for Beginners
I'd avoid anything with that low of a bandwidth. Shoot for a minimum of 100MHz bandwidth. Digital is nice, but if you're troubleshooting an analog circuit, such as the IF in a BitX, the signal is constant and will always be onscreen anyway.
Remember when buying used, most of those old Tek & HP scopes out there are more than 30 years old. Caps are beginning to dry out but if you can get one that has recently been re-capped, that's the way to go, but I'm a bit biased. 7 of my 8 scopes are Tek ranging from X-Y to 1GHz. The one non-Tek is a Motorola and the only reason I have it is because it's part of my service monitor.
Vince.
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On 01/23/2018 05:55 PM, V Zecchinelli wrote: It's only 20Mhz but would have some application. I have been using one
for years in robotics industry and has worked flawlessly for me.
Vince N1VIN
On 1/23/2018 4:45 PM, Guy N7BIR wrote:
While on the Circuit Specialists web site I came across this:
Hantek 20 MHz USB Oscilloscope for PC.
Is this something that could be used for radio troubleshooting? Have
never used a scope before and would appreciate your comments.
73,
Guy N7BIR _._,_._,_
--
Michigan VHF Corp.
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Re: Oscilloscope for Beginners - A story
I started collecting
Tek scopes (and quit) 30 years ago.? I still have several.? I
got 2 of the nice 50MHz dual trace that I fixed for sale.?
They had some matched transistor modules that would go out.? I
made a PCB and made some.
I put them in Craigs
list for $50, and no one bought them.? One sits in the corner
of the bathroom, the other ?
I even have a big
collection of probes, collecting Tek stuff is a sickness.
I started collecting
7904As, the top dog back then.? Then I would go to swap meets
and look for plugins.
I have 3 7904A.? I
paid from $400 to $1000 for them with some plugins.? They are
Real (not digital) 400 MHz tanks.
4 Chanel plugins
spaces, several Time Delay plugins spaces.? Every option you
could want.
I think 1 still works
mostly.? One is on the roll around cart.? It is really nice to
use them.? But any day you can turn them on and Zap.?? I
walked into the cold garage one morning, Zap.? A high voltage
problem.? Worked on it for a month and gave up.? I think the
HV multiplier shorted inside?? If you ever have seen schematics
of these things, they are so many parts.? The Tek Engineers
were geniuses.? I have had to Spice some circuits to try to
figure out HOW they DC coupled so many transistors in a row!
And if you are luck,
another $50 and you can find a manual online?
So, I gave up, if it
is not a simple fix, they seemed to consume all my time.
My Rigol sits all day
with its fan annoying me and it is TOO small.? It has too many
features and everything is too small.? It is really compact,
like lunch box sized.
But I finally
realized to give up on the shopping cart sized 7904As.? By the
way the A model is much more preferable to the older 7904.?
They are all spread over a garage that is now a museum to
them.
Tektronixs engineers
back then were the cream of the crop.? Not just any EE could
get a job with them.? They did amazing circuit design with
hundreds of transistors.
They invented their
own sockets, knobs, and switches!? I think a loaded 7904A went
for over $20K!!
73's
Mike, WA6ISP
On 1/23/2018 5:52 PM, Jerry Gaffke via
Groups.Io wrote:
I used a Tek 465 at
my first job, the 475's little brother.
And used Tek 2465's most of the 1980's.
I like an analog scope, the aliasing on these digital beasts can
really throw you.
I know exactly what an analog scope is doing.
On the other hand, we bought a cheap used 475 off the web about 10
years ago at work
for use in manufacturing.? Dim CRT, and didn't trigger right,
though sort of good enough.
But you are right, there are web resources out there to help
restore those old scopes.
And they are plenty good.? I'd be concerned about getting parts on
some of
the less common models.
The RIgol and Siglent scopes are a real bargain for what they
offer if you want to buy new.
I have an old Rigol DS1052E on my desk in front of me.
Jerry, KE7ER
On Tue, Jan 23, 2018 at 05:26 pm, John Backo wrote:
There is a large following and restoration business
on-line
for Tek scopes. I have always wanted to get a Tek 475A.
And, as noted, they are available for a reasonable price.
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
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Hi all
Just completed the mods and installed V2.03 of the firmware on my BITX40, a vast improvement over the original firmware and it's working well.
I only have one problem. When I first switched it on I could only get LSB and USB when changing modes. When I keyed up the TX it switched to CWL and now I can only get
CWL and CWU on the mode function.
Anyone have any ideas or a solution for it.
Dave G8PGO
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Re: #ubitx-help Strong Audio Tones in and outside audio receive passband
#ubitx-help
Bill :?
I am using "Spectroid" which is free. It works quite well and was very useful in setting the BFO frequencies on my BITX40?
running Raduino V2.03.
Cheers
Michael VE3WMB?
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I don't have the original in front of me but my design is as follows
outer layer is 193mm x 63mm x 1.5mm
inner layer is 183mm x 53mm x 3mm
both have a .33 radius on the corners
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Re: #ubitx-help Strong Audio Tones in and outside audio receive passband
#ubitx-help
?maybe he could measure those two oscillators with a communications receiver and come back with some numbers and we could verify your hypothesis?
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From: [email protected] <[email protected]> on behalf of Jerry Gaffke via Groups.Io <jgaffke@...>
Sent: Wednesday, January 24, 2018 11:07 AM
To: [email protected]
Subject: Re: [BITX20] #ubitx-help Strong Audio Tones in and outside audio receive passband
?
Farhan has said that the uBitx uses a low side BFO, below the crystal filter passband,
because with a BFO about 3khz higher on the high side of the crystal filter?
the harmonics of the 12mhz BFO beat with the harmonics of the 16mhz oscillator on the Nano
and create havoc.? ? I'd guess that you have an especially low 16mhz crystal on the nano,
and/or a pick of 12mhz crystals that happen to be especially high.
Your best bet might be to either replace the nano or replace the 16mhz crystal on the nano.
It might be possible to shield and filter the nano sufficiently somehow, but that would be tough.
Could be that hfsignals would consider replacing your Raduino, you might ask them.
Do you have somebody nearby you could swap out the Raduino with,
see if the problem follows the Raduino?
?
The ideal would be to buy or build an Arduino of some sort with the oscillator far removed from 16mhz.
That would allow us to choose high side second local oscillator injection (currently low side when operating LSB),
which might help improve opposite sideband rejection (we can choose the sharper 12mhz filter skirt)
and perhaps avoid some birdies.
Jerry, KE7ER
On Wed, Jan 24, 2018 at 12:49 am, John wrote:
2. Changes in tones frequency DO occur when:?
? ?2.1 The unit BFO frequency is changed (the most significant variation)
? ?2.2 When the calibration is changed (this changes the BFO frequency too)
? ?2.3 When I touch the pins of the SI5351 crystal
? ?2.4 When I touch the pins of the Arduino's crystal
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Re: #ubitx-help Strong Audio Tones in and outside audio receive passband
#ubitx-help
Farhan has said that the uBitx uses a low side BFO, below the crystal filter passband,
because with a BFO about 3khz higher on the high side of the crystal filter?
the harmonics of the 12mhz BFO beat with the harmonics of the 16mhz oscillator on the Nano
and create havoc.? ? I'd guess that you have an especially low 16mhz crystal on the nano,
and/or a pick of 12mhz crystals that happen to be especially high.
Your best bet might be to either replace the nano or replace the 16mhz crystal on the nano.
It might be possible to shield and filter the nano sufficiently somehow, but that would be tough.
Could be that hfsignals would consider replacing your Raduino, you might ask them.
Do you have somebody nearby you could swap out the Raduino with,
see if the problem follows the Raduino?
?
The ideal would be to buy or build an Arduino of some sort with the oscillator far removed from 16mhz.
That would allow us to choose high side second local oscillator injection (currently low side when operating LSB),
which might help improve opposite sideband rejection (we can choose the sharper 12mhz filter skirt)
and perhaps avoid some birdies.
Jerry, KE7ER
toggle quoted message
Show quoted text
On Wed, Jan 24, 2018 at 12:49 am, John wrote:
2. Changes in tones frequency DO occur when:?
? ?2.1 The unit BFO frequency is changed (the most significant variation)
? ?2.2 When the calibration is changed (this changes the BFO frequency too)
? ?2.3 When I touch the pins of the SI5351 crystal
? ?2.4 When I touch the pins of the Arduino's crystal
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Re: Almost all of the firmware has been modified to fix known bugs and enhance CAT communications.
Joel
first, thanks for using my firmware. Master calibration and BFO Calibration in version 0.27 are the still original source. I also experienced similar problems with uBITX at the beginning of the purchase. Maybe that's because of the wrong BFO Calibration value.This is because the BFO Calibration value is the largest that can affect the receive performance in the firmware source code. Updating the firmware does not initialize the wrong BFO because my firmware keeps the original source code eeprom areas. (include bfo calibration value) This is the same with the original source.
Please use one of the solutions below. (1 and 2 are initialization methods available to original firmware users)
1.BFO Menu Entry -> Set 11995000 -> Press PTT (Must) ? when you entry BFO Calibration Menu, perhap you see 11995000 value, Be sure to press the PTT button
2.uBITX Turn off -> while holding press the function key, turn on the Tun on uBITX -> Entrh Factory reset -> Press PTT according to the menu,
3.Execute uBITX Manager, Connect to uBITX -> Read Memory from uBITX -> Decode -> Check to Master calibration, BFO Calibratio Values ?Master Calibration : 0? (Factory Default) ?BFO Calibration : 11995000 (Factory Default)
4.Or I will send eeprom factory initialization firmware that I use when testing after firmware development. ?I delete the settings several times a day because I always factory reset eeprom before release considering various users. ?All settings will be the same when uBITX is received.
Ian KD8CEC
Hi Ian,
I have been using .027 for the last week or so and have had no problems until I tried to calibrate the frequency, the radio goes off into la la land and the only way to recover is to reload the firmware. I tried this many times and cant recover after calibration. Is this a problem anybody else is having? It seems the BFO goes way out after calibration because the signal becomes very bassy and very faint, barely can hear. Any ideas? In BFO calibration I cant get the sound right either.
Joel
N6ALT
-- Best 73 KD8CEC / Ph.D ian lee kd8cec@...
(my blog)
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I ordered mine on 15 December.. I have been told (yesterday)that in my case it should ship within the next two days. Sent from my iPhone
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On Jan 24, 2018, at 10:14 AM, wb7dmx@... wrote: there was a problem of no toroids, but they received some on the 1-13-2018
the Ubix should be shipped by the end of this month.
that's what they told me.
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I found the following on mine:
Outer 1.35
Inner 2.25
Groove on shell 2.45
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there was a problem of no toroids, but they received some on the 1-13-2018
the Ubix should be shipped by the end of this month.
that's what they told me.
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Doug,
I'm doing something similar, but without an original in front of me (it's still in transit). I would like to print mine, but of course I want it to fit when the case gets here. It looks like you have used a thickness of 1.45 mm for the outer layer, and 2.90 mm for the inner layer. Please confirm if those are the thicknesses of the original panel. Thanks,
Jake
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Any word on the cutoff for Round 2?? I ordered mine 21 December 2017 and paid for the DHL.? No word, yet, on when it's going to ship.
--
73 de W5NNH
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Allard PE1NWL
Arvo W0VRA
