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Re: #ubitx-help Strong Audio Tones in and outside audio receive passband #ubitx-help

Bill Bates
 

开云体育

Spectroid app loaded Michael & looks good ?, many thanks ?.

From: Michael Babineau
Sent: ?24/?01/?2018 17:40
To: [email protected]
Subject: Re: [BITX20] #ubitx-help Strong Audio Tones in and outside audio receive passband

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?

Re: #ubitx-help Strong Audio Tones in and outside audio receive passband #ubitx-help

Dave Bottom
 

For Audio Spectrum Analysis I use RTA Audio.??
There is a Free version and a inexpensive purchase version for both iOS and Android.
I've found it very useful.

Dave WI6R

On Wed, Jan 24, 2018 at 5:42 AM, Bill Bates <billy.bates@...> wrote:
I would be interested in recommended android apps for audio spectrum analysis, there are lots out there but what is a good one (preferably free ?) God bless, Bill. G6ATO
From: John
Sent: ?24/?01/?2018 08:54
To: [email protected]
Subject: [BITX20] #ubitx-help Strong Audio Tones in and outside audio receive passband

Hello group,

I need help after spending over a week trying to figure out an issue I have with my uBitx.?

First let me thank Farhan and team for such a great kit. I have built my uBitx around a manpack configuration (External side mounted heatsink, no connection at the back, room for an autotuner).

The issue I have is that I have strong audio tones inside and outside the passband on receive, typically up to 15khz.

I have attached an audio recording and took some audio spectrum snapshots made by placing the phone's microphone near the uBitx speaker. Using this method the dB value of the different FFT frequencies need to be taken with a grain of salt since there are not measured with an oscilloscope. Nevertheless the relative value are of interest here.

As you can see in the spectrums the tones are often near or above the level of the decoded signal which makes them impossible to ignore.

I have observed the following:

1. The tones frequency DO NOT change significantly with tuning up or down, or going through the menu items except when passing over the "CW Speed" option (this can be heard in the recording).

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

I have re-done the factory alignment and BFO adjustment several times and always come back to a +16 alignment number and a BFO frequency of 11,996.8Khz.

I have checked or tried the following:

A. Three different power supplies (one Lipo direct, one Lipo through a filtered 12V UBEC, a noise free 13.8V commercial power supply). No change except a small shift in tone frequency).

B. Checked the voltage on the Radiuno: 5.01VDC.

C. Added capacitors from the Radiuno 5V rail to ground (470uF, 0.1uf mica, no change), power supply rail to ground (470uF, no change), 1nF between casing of Arduino crystal to ground (produces a shift in tone, but no reduction in amplitude).

D. I tried a modified software where I would shift the frequencies of both the first and second oscillators by the same amount, thereby leaving the received frequency the same. The result was no change in tones frequency. So only a BFO frequency change produces a shift in tones.?

C. I noticed that when I shift the tones frequency (through BFO adjustment for example), the amplitude of the tones seem to follow the filters passband. This would indicate that they are produced before the sideband filter.

So I have thought of some mixing of the Arduino's crystal frequency with the BFO's one, but this seems to be contradicted by the fact that going over some menu items changes SOME tones.

Needless to say I am out of ideas right now, so your input is welcomed.

Best regards,

John (VK2ETA)





--
73 Dave WI6R
Re: #ubitx-help Strong Audio Tones in and outside audio receive passband #ubitx-help

Bill Bates
 

开云体育

Thanks for the reply Michael ?, God bless, Bill.

From: Michael Babineau
Sent: ?24/?01/?2018 17:40
To: [email protected]
Subject: Re: [BITX20] #ubitx-help Strong Audio Tones in and outside audio receive passband

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?

Re: #ubitx-help Strong Audio Tones in and outside audio receive passband #ubitx-help

Dave Bottom
 

开云体育

I have the same issue that oddly is getting worse over time with no change to the Radio other than firmware.

I’ve started replacing critical leads with shielded cable but agree that audio filtering might help if early enough. My headphones already roll off at 6000 so it way down but still annoying.

Work continues...

Dave WI6R

Sent from my iPhone

On Jan 24, 2018, at 8:54 AM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

John reports audio tones up around 15khz.
That is not in the normal SSB passband and may be perfectly normal for this rig.
Best solution here may be shielding and perhaps audio filtering.

Farhan's fix for interference between the 16mhz nano oscillator and the 12mhz bfo was to move the bfo down by perhaps 3khz.
The harmonics involved here are the 3rd and 4th respectively, to give 48mhz.
Moving the bfo down 3khz would only move the tones down by 12khz.
I don't think replacing the raduino is going to fix a 15khz tone.
If it is loud enough to be objectionable, this particular rig may have some sort of extra coupling between the two
due to loose wires or something.
?
The Bitx40 also had a 16mhz nano and 12mhz bfo, I don't recall this issue ever coming up,
so perhaps some sort of shielding or filtering is the answer.
The uBitx has the Raduino mounted directly on the main board, the nano very near the modulator/demodulator?
That's good and bad, we want the 12mhz clk0 connection to be very short.

So still some open questions here.

Re: k2zia w8tee tft lcd

Jack Purdum
 

Bigger is better...especially when the price is almost the same.

Jack, W8TEE


From: Richard E Neese <kb3vgw@...>
To: [email protected]
Sent: Wednesday, January 24, 2018 11:55 AM
Subject: Re: [BITX20] k2zia w8tee tft lcd

Wich one then DR Jack as I am building out the board but need the lcd. And the latest firmware
‘
?
Sent from for Windows 10
?
From: Jack Purdum via Groups.Io
Sent: Wednesday, January 24, 2018 11:54 AM
To: [email protected]
Subject: Re: [BITX20] k2zia w8tee tft lcd
?
That's a 2.4" display.
?
Jack, W8TEE
?
From: Richard E Neese <kb3vgw@...>
To: [email protected]
Sent: Wednesday, January 24, 2018 11:50 AM
Subject: Re: [BITX20] k2zia w8tee tft lcd
?


will this one work
?
?

Virus-free.


Re: k2zia w8tee tft lcd

Jack Purdum
 

Probably, but why spend 2x the price over the one I told you about?

Jack, W8TEE


From: Richard E Neese <kb3vgw@...>
To: [email protected]
Sent: Wednesday, January 24, 2018 12:21 PM
Subject: Re: [BITX20] k2zia w8tee tft lcd



will this one work k ?


Re: AE7EU Top Level PCB Mod

 

开云体育

Wow, beautiful, a piece of Artwork!



On 1/24/2018 9:44 AM, Diver Martin wrote:
I am liking how the mechanicals are shaping up.... ?missing a bunch of parts and made a digikey order for the remainder...

On Jan 23, 2018 8:48 PM, "Martin Held" <diver.martin@...> wrote:
Nick,

When I get the positions finalized, I'll post my gerber files most likely, or at the very least, post the drill file.? But not until I know they're correct... I'm building up the board now, which will take me a good chunk of my copious spare time...

On Tue, Jan 23, 2018 at 7:32 PM, <nickpullen@...> wrote:
Anychance someone has these PIN outs/possition in gerber files?
I would like to do my own full Mezanine board...
73, NIck



--
Martin Held - AE7EU

-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...
Re: blank panel for EF01 enclosure .stl #3d_printing

 

开云体育

I printed a front panel.? But I used a huge 4x20 I2C LCD, now not much room for controls.

I have Volume/SW and Rotary, have not put the jacks in yet.

I could make an STL of a Blank panel if it would be of use to anyone?

Or maybe put the 16x2 LCD centered?

I have a Hictop 3D printer from a kit.? I had to turn the part lengthwise.

It keeps the heat more even in the center of the build?

I have the heated plate turned all the way (200) and the extruder to about 125 for ABS.

The edges of long thin parts curl up.? I found turning up the bed helped this?

I have not tried PLA?? To much trouble to change.? I had problems with PLA melting on a hot day when in the car!

Lots of printers may not quite have the room?

73's

Mike


On 1/24/2018 9:25 AM, Arvo KD9HLC via Groups.Io wrote:
On Wed, Jan 24, 2018 at 09:13 am, Doug W wrote:
My comment about the radii was in response to Arvo...
And my reporting of the radius on my sample was not an endorsement of such radii design decisions.

The groove is around 2 deep.? I didn't try to measure the radius in the corresponding corners of the groove.

Mike, did you print a front panel? 

-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...
Re: AE7EU Top Level PCB Mod

chris gress
 

Hey its looking good chris

On 24 Jan 2018 17:44, "Diver Martin" <diver.martin@...> wrote:
I am liking how the mechanicals are shaping up.... ?missing a bunch of parts and made a digikey order for the remainder...

On Jan 23, 2018 8:48 PM, "Martin Held" <diver.martin@...> wrote:
Nick,

When I get the positions finalized, I'll post my gerber files most likely, or at the very least, post the drill file.? But not until I know they're correct... I'm building up the board now, which will take me a good chunk of my copious spare time...

On Tue, Jan 23, 2018 at 7:32 PM, <nickpullen@...> wrote:
Anychance someone has these PIN outs/possition in gerber files?
I would like to do my own full Mezanine board...
73, NIck




--
Martin Held - AE7EU

-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?
Re: AE7EU Top Level PCB Mod

Diver Martin
 

I am liking how the mechanicals are shaping up.... ?missing a bunch of parts and made a digikey order for the remainder...

On Jan 23, 2018 8:48 PM, "Martin Held" <diver.martin@...> wrote:
Nick,

When I get the positions finalized, I'll post my gerber files most likely, or at the very least, post the drill file.? But not until I know they're correct... I'm building up the board now, which will take me a good chunk of my copious spare time...

On Tue, Jan 23, 2018 at 7:32 PM, <nickpullen@...> wrote:
Anychance someone has these PIN outs/possition in gerber files?
I would like to do my own full Mezanine board...
73, NIck




--
Martin Held - AE7EU

-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

20180124_075658.jpg

Re: On-Off Switch on Volume Control will not turn on. #parts

Dave Bottom
 

开云体育

Here is a replacement with the same package style and size except a 6mm metal shaft making getting knobs of the same style much easier.

Sold on line and by independent electronics stores.

LKG (Philmore) p/n PC845

image1.jpeg

Dave WI6R

Sent from my iPhone

On Jan 23, 2018, at 5:03 PM, Doug W <dougwilner@...> wrote:

Try this?
Re: Oscilloscope for Beginners - A story

 

开云体育

The Rigol I got had about 17 hrs. on the meter.? It still was running all the options they turn off after 30 Hrs.


Then they want you to pay!

At the time they were $299 new, I bid $260 on eBay.? What a deal, and you get 4 new probes!? No tax and just a little shipping.

There are tons of information out there on the DS1054Z.??? Lots of reviews.? Only big complaints are too much on the screen and it is very small.? The encoders have small knobs, and you have to push just right or the encoder might move?? There is a hack out in the wild to change the options yourself, so you get 100 Mhz and special triggering functions, and deep memory.?? You do it at your own risk.? You can find info on lots of sites.? I doubt if their newer models have this "feature"?

I just wish it was a little bigger.? I hope it stays working now that I am bragging about it!

I really hated my $65 PC connected scope mentioned to start this thread.? Hantek had NO support and no Firmware

updates.? I had to carry a big 600V 1uf cap to AC couple it.? The triggering options were very minimal.

Like you I really like Real Analog scopes, but their day is gone.

73's

Mike, WA6ISP



On 1/24/2018 9:12 AM, Jerry Gaffke via Groups.Io wrote:
I've always had a soft spot for a good analog scope,
and John's post had me prowling around ebay some.
Anything moderately cheap is "parts only", refurbished you spend about
as much as you would for a new Rigol.

Unless you get a really good deal on one you know works,
I can't recommend an old used scope to the typical hobbyist.
Fixing those old scopes with all their custom parts can be non-trivial.

Jerry, KE7ER?


On Wed, Jan 24, 2018 at 08:24 am, Michael Hagen wrote:

So, I gave up, if it is not a simple fix, they seemed to consume all my time.

?


-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...
Re: Almost all of the firmware has been modified to fix known bugs and enhance CAT communications.

[email protected]
 

Cool! Did you hook up the PPS line? That would allow for time synchronization that far exceeds what is necessary for these modes, but might as well do it anyway as it is just one GPIO...
I have a Raspberry Pi based NTP server on my home network that uses the GPS+PPS method, been rock solid for years now. This also brings up other thoughts like automatically setting the gridsquare in WSJT-X.
Re: blank panel for EF01 enclosure .stl #3d_printing

 

On Wed, Jan 24, 2018 at 09:13 am, Doug W wrote:
My comment about the radii was in response to Arvo...
And my reporting of the radius on my sample was not an endorsement of such radii design decisions.

The groove is around 2 deep.? I didn't try to measure the radius in the corresponding corners of the groove.

Mike, did you print a front panel?
Re: k2zia w8tee tft lcd

 



will this one work k ?
Re: blank panel for EF01 enclosure .stl #3d_printing

 

Two clarifications to my last message
My comment about the radii was in response to Arvo, not a criticism of Mike's design.? If fact, Mike posted while I was still typing.? His aversion to the metric system aside, Mike's design chops far exceed what I cobbled together.
I am measuring with cheap tools and designing with a free CAD program.? This works for me.? I don't think I would recommend a $3 harbor freight caliper and tinkercad for mission critical or life support designs.
Re: Oscilloscope for Beginners - A story

 

I've always had a soft spot for a good analog scope,
and John's post had me prowling around ebay some.
Anything moderately cheap is "parts only", refurbished you spend about
as much as you would for a new Rigol.

Unless you get a really good deal on one you know works,
I can't recommend an old used scope to the typical hobbyist.
Fixing those old scopes with all their custom parts can be non-trivial.

Jerry, KE7ER?


On Wed, Jan 24, 2018 at 08:24 am, Michael Hagen wrote:

So, I gave up, if it is not a simple fix, they seemed to consume all my time.

?
Re: Almost all of the firmware has been modified to fix known bugs and enhance CAT communications.

 

I did it today.

We're planning to post it on the blog after the test.

I removed the usb connector and planted a sound card and gps in place. this is simple and funnfy work.

After installing the GPS, I got a very a funny thought.
I am going to experiment with various things this weekend.


2018-01-25 1:33 GMT+09:00 <al_91dak@...>:

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"?



--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
(my blog)

20180124_112544.jpg

Re: Oscilloscope for Beginners

 

Found this long time ago at
Enjoy!!!
==================================================
Hot Rod Oscilloscope? ?
by Dennis L. Feucht
?
With apologies to the '60s hit tune, "Hot Rod Lincoln"
?
You've heard the story of the bandwidth race,
Where 'scopes and counters were setting the pace;
Well that story is true, I'm here to say;
I was using a 545A.
?
It's got a graticule, all lit up,
That front-panel claptrap makes it look tough.
It's got plug-ins, uses 'em all;
It's got good risetime, and also fall.
?
With a dual-trace display at reasonable cost,
And forty-eleven knobs, you can really get lost;
It's got a dual-delayed timebase, but I ain't scared,
The trace is sharp; the probes are fair.
?
Pulled out a new project late one night,
The test equipment was burning bright,
I started driving a wideband amp,
To see which stage I needed to damp.
?
When all of a sudden in the blink of an eye,
A series of waveforms passed me by,
And I said, "Wow, that's a marvel to me!"
Pretty soon a square-wave was all I could see.
?
Now the boss was ribbing me for being behind,
So I thought I'd make the probes unwind,
Took the volts per div knob, and man alive!
I turned it up to a setting of 5.
?
Powered the wideband amp again,
And drove it with a function gen,
Set the amplitude knob to three or four,
The levels were hitting the ceiling and floor.
?
Now the transient response made no sense,
The scope display looked like a picket fence.
I slowed it down and was glad to know,
That it wouldn't alias like a DSO.
?
I tweaked the circuit here and there,
Replaced a cap and transistor pair;
Got the speed I needed with room to go;
Manufacturing would be glad to know.
?
Smoke was coming from out of the load
When I set the trigger to hf mode;
The power bandwidth was looking right;
Nearly approaching the speed of light.
?
The task was finished, the specs first-rate,
The customers called, said the amp worked great;
I got a promotion, moved out of L.A.,
And I credit success to that '45A!
?
======================================
Re: k2zia w8tee tft lcd

 

开云体育

Wich one then DR Jack as I am building out the board but need the lcd. And the latest firmware

‘

?

Sent from for Windows 10

?

From: Jack Purdum via Groups.Io
Sent: Wednesday, January 24, 2018 11:54 AM
To: [email protected]
Subject: Re: [BITX20] k2zia w8tee tft lcd

?

That's a 2.4" display.

?

Jack, W8TEE

?

From: Richard E Neese <kb3vgw@...>
To: [email protected]
Sent: Wednesday, January 24, 2018 11:50 AM
Subject: Re: [BITX20] k2zia w8tee tft lcd

?



will this one work

?

?


Virus-free.

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