Date   
Re: Sweeperino?

MadRadioModder
 

Yep, I missed this thing the first time around.  I had a look at the schematic and it’s perfect!  Just what I would have done. You saved me some work in reinventing the wheel!   NOW…Just need someone to make up boards…

 

MRM

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Ashhar Farhan
Sent: Wednesday, February 13, 2019 7:40 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Sweeperino?

 

Sweeperino is dated. The Antuino that I posted a few weeks ago is a far better device. It is almost a spectrum analyzer, a very good antenna analyzer and an SNA rolles into one. It uses ans Si5351 instead.

- f

 

On Thu 14 Feb, 2019, 3:27 AM Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io wrote:

The sweeperino used the $10 si570, Farhan got it  down to 4mhz, CMOS out version goes up to 160mhz, popular for over a decade.
The si514 is similar to the si570, 100khz-250mhz, came out later and doesn't have much of a following in the hobbyist community.
The si5351 (as used on the Raduino) is 4khz-225mhz, is only $1 and can provide multiple clocks. 
All three of the above operate from 3.3v.  (Probably don't want the 1.8v and 2.5v si570 variants, and be sure it's the CMOS out)

So you could start with a Raduino (already has the si5351) as MMR suggested.
Or start with a Nano, an si5351 breakout board (Adafruit/QRPLabs/Etherkit), and an i2c LCD display with pullups removed.
Then add some sort of detector (either an ad8307 or diode detector) that feeds an ADC input of the Nano..
You may be writing software for this (replace the sweeperino's si570 code with the uBitx's si5351bx routines).
If you don't want to write code, perhaps somebody in this forum already has or is willing to take it on.
Alternately, just follow Farhan's sweeperino recipe using his CMOS 3.3v si570, and use the Nano software he posted. 

Jerry


On Wed, Feb 13, 2019 at 12:22 PM, Michael Hagen wrote:

I looked at the schematic for Sweeperino.

When I go look at Mouser, the SI 517 is only for 3.3V.  And it starts at 10 MHz.

There is a 514?  Goes down to 100Khz.  I wonder if the Library works with that one too?

Both I2C.

Thanks for any info.

Mike, WA6ISP


Virus-free. www.avg.com

--

…_. _._

Re: Newb help with uBitx40

Vic WA4THR
 

After the uBitX came out, the Raduino design was modified and is the same hardware for both the uBitX and the BitX40, so the published instructions for connecting it on the HFSignals website are confusing, at best. You should have 2 wire harnesses, one with 8 wires and one with 5. You still connect one plug to the 8-pin header as shown, but the other plug now connects to the 16 pin header with the bent pins on top in your picture. You just plug into the 5 pins closest to the blue contrast pot with the yellow wire on the very end and leave the other pins not connected to anything.

=Vic=

Re: uBitx has a bit too crispy / semi-distorted audio even on low signal levels #ubitx #ubitx-help

 

Vic,

I suggest a preset for better result. For fixed start with 33 ohms and go up till you get satisfactory sound quality.
For me 39 was good enough. The output transistors should not get hot in idling condition.

Raj

At 14/02/2019, you wrote:
Raj, my uBitX v.4, just assembled after being purchased in June of last year, also has the slightly distorted audio into an 8 ohm speaker and I was looking at that biasing mod. Are you suggesting a 47ohm fixed resistor is enough to address this between D14-D15?

=Vic=

Re: Sweeperino?

Ricardo Suarez
 

Hello, Ashhar

Can tell us if you have posted the board of the antuino on any place?

Regards

Rick
LU9DA

El 14/2/2019 a las 01:40, Ashhar Farhan escribió:
Sweeperino is dated. The Antuino that I posted a few weeks ago is a far better device. It is almost a spectrum analyzer, a very good antenna analyzer and an SNA rolles into one. It uses ans Si5351 instead.
- f

On Thu 14 Feb, 2019, 3:27 AM Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io wrote:
The sweeperino used the $10 si570, Farhan got it  down to 4mhz, CMOS out version goes up to 160mhz, popular for over a decade.
The si514 is similar to the si570, 100khz-250mhz, came out later and doesn't have much of a following in the hobbyist community.
The si5351 (as used on the Raduino) is 4khz-225mhz, is only $1 and can provide multiple clocks. 
All three of the above operate from 3.3v.  (Probably don't want the 1.8v and 2.5v si570 variants, and be sure it's the CMOS out)

So you could start with a Raduino (already has the si5351) as MMR suggested.
Or start with a Nano, an si5351 breakout board (Adafruit/QRPLabs/Etherkit), and an i2c LCD display with pullups removed.
Then add some sort of detector (either an ad8307 or diode detector) that feeds an ADC input of the Nano..
You may be writing software for this (replace the sweeperino's si570 code with the uBitx's si5351bx routines).
If you don't want to write code, perhaps somebody in this forum already has or is willing to take it on.
Alternately, just follow Farhan's sweeperino recipe using his CMOS 3.3v si570, and use the Nano software he posted. 

Jerry


On Wed, Feb 13, 2019 at 12:22 PM, Michael Hagen wrote:

I looked at the schematic for Sweeperino.

When I go look at Mouser, the SI 517 is only for 3.3V.  And it starts at 10 MHz.

There is a 514?  Goes down to 100Khz.  I wonder if the Library works with that one too?

Both I2C.

Thanks for any info.

Mike, WA6ISP

Re: Winding toroids

Tom, wb6b
 

"FWIW here’s my method for measuring inductance."

Mike


That looks like a good setup.

On a related note. I have a number of cores that that are not color coded. As long as I can keep track of which is which they work as intended from the supplier (but the specs supplier are rather slim). However, I'd like to characterize these cores to match them up with the actual mixes and frequency performance so I can buy generic toroids. Is there any reasonably cost test device to characterize the core parameters vs frequency, the magnetic saturation points and such.

I'd been thinking about brewing up a fixture where I could just wrap a few turns of wire through the toroids hooked to a bridge where the tester would sweep the frequency over a wide range while measuring the impedance. This would characterize the permeability and such vs frequency. I could probably match that up with the published spec of common core.

The other issue would be the magnetic saturation point. That would give me an idea of what power levels the core would be good for. Possibility I'd add a second winding into the core and sweep a varying DC current while repeating the RF frequency tests to characterize the core with core parameters vs frequency vs current.

I don't know how well the DC layered over the RF will match proper measurements, but I don't want to have a multi hundred watt RF source in order to test a core.  

Maybe only a few simpler tests are enough to determine what the core mix is and then you match the physical dimensions to the standard core data sheets to know what you have. 

I assume this ground has already been covered by others.

Tom, wb6b

Re: Upgrades and backward compatibility

Scott McDonald
 

Hey thanks Jim, that’s good news for me.

With the amount of time and money we invest in new displays, duinos and even boxes, knowing that a board swap is quick and easy, and not necessarily requiring a computer, seems like a big advantage to me.

And it will be instructive to see what you did with the code.

Thanks again.

Scott ka9p


On Feb 13, 2019, at 6:56 PM, Jim Sheldon <w0eb@...> wrote:

Hi Scott,
Good news - we now have a preliminary version of the BITeensio software working on a V5 board - it was NOWHERE near as simple as everyone was thinking --- Ashhar Farhan is a very sloppy programmer and there were quite a few errors in his USB/LSB frequency selections/offsets ref the new IF frequency.   We believe we have it straight now, but it will take another day or two of testing before we know for sure.

He used an LM386 for the audio amp and they are known to be internally noisy -- this one is no exception, but it's livable and our Passband Tuning allows you to tailor it a bit.

We DO plan on having a menu item that will allow you to select either V4 and earlier or V5 boards so you should be able to switch the board between models but you most likely will have to re-calibrate it between boards for the first swap and again if you move it to a different V4 or V3 board as the crystal filters are all different.  The same would be true if you switch it between several of the V5 boards, you'd have to recalibrate it when you switch the board over so it won't be completely plug-and-play and that's due to the differences in the crystal filter's crystal frequencies.

Jim - W0EB

------ Original Message ------
From: "Scott McDonald via Groups.Io" <ka9p@...>
Sent: 2/11/2019 9:15:40 AM
Subject: Re: [BITX20] Upgrades and backward compatibility

Jim, how much work would it be to just add the IF selection and filter switch points as an option in the program so a Biteensio could just be moved back and forth between boards?

_,_

Re: Sweeperino?

Tom, wb6b
 

I think the link here is the one.

https://groups.io/g/BITX20/message/64772

Tom, wb6b

Re: Complainers?

ke6bgn@...
 

John,
I have read this post, and many others, from the start of the post, so at least in this case, I know what I did.
It was Andy that said "nice words", and I know it was in reference to the post that contained all of those statements I listed. I just happen to not agree with Andy that any of those statements, in the way they were used, were "nice words".

73 de RC KE6BGN.....

Re: Sweeperino?

Ashhar Farhan
 

The latest version is on https://github.com/afarhan/antuino

Please be warned that this is still 8n production hell. I would want some more gain post filter and probably a second filter with two crystals right before the AD8307.
- f

On Thu 14 Feb, 2019, 9:32 AM Tom, wb6b <wb6b@... wrote:
I think the link here is the one.

https://groups.io/g/BITX20/message/64772

Tom, wb6b

ubitx on FT-8 Digital modes ops

Prathap Naidu
 

Hi

Just sharing on FB the  ubitx on FT-8 digital modes

https://www.facebook.com/prathap.kumar.77312/videos/1978547122243903/

 

More videos will follow

Tnx 73

Pop

VU2POP

 

 

Re: SMD inductors for L5 and L7 replacement

Nigel G4ZAL
 

Have you been able to fit yours and confirm they clean things up Peter?

Nigel

Re: SMD inductors

Peter Russell <peter.russell@...>
 

Hello,

£1 will cover it if you are in UK.

Let me have your details and I'll get them out asap.

Please lets do this off list - I don't want to clutter things up.

Peter.

On 02/02/2019 10:41, a.vision via Groups.Io wrote:
Peter I'm in the UK and will be happy to take 10 off you please let me know when you have them and we can sort payment thank you
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Peter Russell <peter.russell@...>
Date: 02/02/2019 08:53 (GMT+00:00)
To: BITX20@groups.io
Subject: Re: [BITX20] SMD inductors
Thanks for that Sarma.
I've placed an order for 300 and I expect them around 11 february.
As I'll have a lot to spare, I'm quite willing to pass them on at cost
(plus postage) to anyone in UK who needs them.
I'll let you know when they arrive.
Peter G8FWY
On 02/02/2019 06:39, MVS Sarma wrote:
> I can't buy that large quantity  as it is not edible item. we cant use .
> But this is supposedly the part that RaAJ used.
>
>
https://www.ebay.com/itm/300pcs-inductor-coil-smd-680nH-2-4R-size-1210-B82422A3681K-EPCOS-/142986858930
>
> On Sat, Feb 2, 2019 at 11:12 AM Raj vu2zap <@Raj
> <mailto:@Raj>> wrote:
>
>     0603 does not work.
>
>     At 01-02-19, you wrote:
>      >Can someone help me with the part number and supplier ( UK ) for
>     the 680nH smd inductors used to replace L5 and L7.
>      >
>      >Just found some on Digikey but they were very small (0603) and
>     they wanted £12 for shipping!
>      >
>      >Peter G8FWY.
>
>
>
>
>
---
This email has been checked for viruses by AVG.
https://www.avg.com

Re: SMD inductors for L5 and L7 replacement

MVS Sarma
 

Good news. I need not repent that i wasted Peter's money. 
I exepect others to make adantage of 1 pound offer for 10 lot.

On Thu, 14 Feb 2019, 12:58 pm Nigel G4ZAL <nigel@... wrote:
Have you been able to fit yours and confirm they clean things up Peter?

Nigel

Re: SMD inductors

Vic WA4THR
 

I would also like 10, Mike. Let me know when and how to pay.

=VIc=

Re: SMD inductors for L5 and L7 replacement

Peter Russell <peter.russell@...>
 

No, not yet.

Been a bit busy on other projects.

But they are the specified ones.

Peter.

On 14/02/2019 07:28, Nigel G4ZAL wrote:
Have you been able to fit yours and confirm they clean things up Peter?
Nigel
---
This email has been checked for viruses by AVG.
https://www.avg.com

Re: Winding toroids

 

Hi,

The handbooks are full of good, accurate, descriptions on GDO's, on the physics of their operation, use, and construction.   My '72 handbook's construction project uses the traditional tube design, but by my '77 edition they have moved on to FET ones.  The newer FET ones included frequency counters and you could easily adapt those circuits to using a modern cheap counter.

However, old used ones and simply made ones are perfectly functional.  Dial calibration is not an issue if you have a general coverage receiver.  Once I have a dip obtained in my old Heathkit one, I simply zero in on the exact frequency with my receiver.  Even meters the have lost their coils are fine as you can just wind new ones and recalibrate the dial yourself.

GDO's are valuable because they are used "out of circuit" and so affect the measured circuit the least possible.  They also do the measurement at HF frequency rather than at quite low LF like LC meters do.  For component measurement, that means only one other component is involved so stray or unknown LC values cannot corrupt the measurement.

As clean a sine wave as possible is important for GDO's as this affects the accuracy and especially the sensitivity of the instrument.  Sensitivity is important so that the sensing coil can be a lightly coupled as possible so that it affects the measure circuit the least possible and so that the sharpest, most accurate, dip can be obtained.

73,


Mark.

Re: Winding toroids

Jim Strohm
 

Mike,

How do the results from your inductance measurement jig compare to the (NLA) AADE LC2 inductance meter, or another popular and commonly used inductance meter? 

73
Jim N6OTQ

Re: SMD inductors for L5 and L7 replacement

James Lawrie
 

Just a quick question are the smd inductors needed if one was to provide shielding around the installed toroids? Another quick question what would the results be if two 45 MHz were used back to back, would that solve or improve things?

Thanks,

Jim

On Feb 14, 2019, at 07:46, Peter Russell <peter.russell@...> wrote:

No, not yet.

Been a bit busy on other projects.

But they are the specified ones.

Peter.

On 14/02/2019 07:28, Nigel G4ZAL wrote:
Have you been able to fit yours and confirm they clean things up Peter?
Nigel
---
This email has been checked for viruses by AVG.
https://www.avg.com



Re: Winding toroids

Jerry Gaffke
 

A google image search for "grid dip oscillator circuits" shows zillions of variations,
I wouldn't know which is best without building them all. 
Any hints?

Anybody have any experience with the GDO described in the May 2003 QST?
    "A Modern GDO" by Alan Bloom, N1AL
Does it give a good dip across the range, relative to other designs?
The oscillator uses a single 75pf tuning cap a single tap coil, two MPF102 FET's.
on the coupled sources of two MPF102's..
Ten coils are described for a range of 440khz to 150mhz.
A 2n3904 rectifies the RF waveform for dip detection.

Here's a design from SM0VPO that claims deeper dips through the use 
of a wheatstone bridge arrangement.  Coils described for 1.7 to 180mhz.
    http://sm0vpo.altervista.org/use/gdo2.htm
Seems to get lots of google hits.

Given that we are using $0.10 transistors instead of $20 tubes,
it may make sense to build separate oscillators for each range:
    http://elm-chan.org/works/ddm/report_e.html

Jerry, KE7ER


On Thu, Feb 14, 2019 at 06:41 AM, Mark McNabb wrote:
The handbooks are full of good, accurate, descriptions on GDO's, on the physics of their operation, use, and construction. 

Re: Any Gerber Experts Round Here? #kicad #ubitx

Ben Holmes
 

Public apologies to Art... I didn't see this until today!
Must be getting senile! Sent the files to Art ...