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Re: Seperate group for uBITX ?

Vince Vielhaber
 

I'm glad it sounds good to you. I, for one, will not be subscribing to
the sub groups and I'd bet I'm not the only one. Then if/when it gets too
splintered and disorganized, I'll just unsubscribe.

Vince.

Sounds to me like a sub-group would be worth trying out? It sounds like it
was built for this exact use case.

A few key points from:
/g/GroupManagersForum/wiki/Subgroups

* Members of subgroups are also members of the main group.??

* Members of main groups are not necessarily members of a subgroup.??

Adding a sub-group results in a new mail alias. For example, if we added
"ubitx" we would have "[email protected]" for the main group and
"[email protected]". Subscribers can then optionally subscribe to the
sub-group. It sounds like a perfect solution to me.

Now, where's a moderator when you need one? :)

-David, KM4NKU
--
Michigan VHF Corp.

Re: Seperate group for uBITX ?

 

Sounds to me like a sub-group would be worth trying out? It sounds like it was built for this exact use case.

A few key points from: /g/GroupManagersForum/wiki/Subgroups

* Members of subgroups are also members of the main group.?

* Members of main groups are not necessarily members of a subgroup.?


Adding a sub-group results in a new mail alias. For example, if we added "ubitx" we would have "[email protected]" for the main group and "[email protected]". Subscribers can then optionally subscribe to the sub-group. It sounds like a perfect solution to me.

Now, where's a moderator when you need one? :)

-David, KM4NKU
Re: New to group.

 

Many folks are using the sketch by Allard, PE1NWL.?

He has done a great job on the code and documentation for this and it has a lot
of very useful features including dual VFO, RIT, SPOT (or fine tune for SSB), CW/USB/LSB
so I suggest you check it out. This code is completely backward compatible with Farhan's
original code so it can be loaded into the Raduino without any hardware changes. However,
to take advantage of the added features there are a few simple mods that are needed but are very well documented.

The code and all documentation ?is in GITHUB at :?



Cheers

Michael VE3WMB?
Re: Reverse polarity diode circuit

 

An option
Worried one day you will hook up power to your radio backwards and watch the magic smoke?? Stop worrying by adding this low loss reverse polarity protection board between your power line and QRP rig.

The RPP-SMT version was designed using larger surface mount parts.? Afraid of loosing the really small parts?? No worries! We will include 2 resistors, capacitors, and diodes in each kit!
? ? ?
? ? ?
? ?

RPP-SMT Specifications

Supply voltage input: Minimum 4V (Vgsth) Maximum 50V (Vdss)
Current Load:
Typical Voltage Drop across RPP @ 13.4VDC 1mV@60mA 130mV@820mA
? [email protected] [email protected] for 60seconds
4.25A Continuous


 7A Peak

Re: Si570 Output (Sweeperino) - 100 MHs Sine?!

 

I am confused, do the physical connections to the lcd need to be changed from what Ashhar described, or the listing of the connections in the code , or both, (and if so, exactly how?).
Re: Reverse polarity diode circuit

 

¿ªÔÆÌåÓý

Color coding? ?Years ago I bought a 7A SLA battery at a swap. Late at night I hooked the clips from a small QRP rig, red to red, black to black, RIGHT? and PUFF!?

The seller of the battery had used a RED pricing sticker AND put it right next to the NEGATIVE pole of the battery. ?You know the rest of the story. ?A neat QRP rig became a box of parts to help someone else repair theirs. ?I gave it away. ?The Chinese designer (who is still in business) had put no reverse polarity protection in his circuit.

Dave K8WPE

On Dec 12, 2017, at 2:07 PM, fr.beckenbauer@... wrote:

what happened to the idea of using color coded cables and plugs, or just plugs that aren't reversible if you want to go the extra mile?
Adding a full bridge rectifier to everything can really bite you in the ass when you aren't used to being careful of polarity, and then fry something that isn't protected. So using a diode, so that the device just doesn't do anything when you plug it in the wrong way, is the safest option.

Re: Seperate group for uBITX ?

chris gress
 

I only got a mobile phone to get my emails for this group I don't need a second group so i hope we stay as we are chris

On 13 Dec 2017 09:58, "Craig Thibodeaux" <km4yec@...> wrote:
As someone who has to stretch to learn anything 'new'....certified....I keep screaming not anything new in 'how' I get the new info I want.....

So on that note, please, no, new nothing. (now please give us new radios, more, more....)

I also have not looked into sub groups, as I ask myself why?

What I have pondered is this: hashtags.....

I have a group for emailing purposes for meetings for a local group.? It is new and it, I believe will serve me well in what I want it do.? What I discovered is that as admin I can set hashtags as mandatory, that is, every new topic created must be assigned at least one hashtag.? Another setting I choose was that only moderators could create hashtags.

That way for my limited purpose group, which will always be small, and have just a handful of messages.? Management controls the sorting. I will be able to sort and find what I want.? And hopefully so will everyone else.

I have only used the 'search' feature of sporadically with limited success.? I believe without digging deeper, hashtags are the what I would choose.

Re: Seperate group for uBITX ?

 

As someone who has to stretch to learn anything 'new'....certified....I keep screaming not anything new in 'how' I get the new info I want.....

So on that note, please, no, new nothing. (now please give us new radios, more, more....)

I also have not looked into sub groups, as I ask myself why?

What I have pondered is this: hashtags.....

I have a groups.io group for emailing purposes for meetings for a local group. ?It is new and it, I believe will serve me well in what I want it do. ?What I discovered is that as admin I can set hashtags as mandatory, that is, every new topic created must be assigned at least one hashtag. ?Another setting I choose was that only moderators could create hashtags.

That way for my limited purpose group, which will always be small, and have just a handful of messages. ?Management controls the sorting. I will be able to sort and find what I want. ?And hopefully so will everyone else.

I have only used the 'search' feature of groups.io sporadically with limited success. ?I believe without digging deeper, hashtags are the what I would choose.
Re: Seperate group for uBITX ?

 

Separate groups and lose the cross-pollination that happens between the BITX variants? I think I'm against it. Now, if this were web forum and I was the moderator, I?would support creating a different section just for the uBITX. But in web forums, people join the *whole* forum and then post in the topic that interests them the most. If a sub-group would do that, then maybe I'd support it. But I'd?really hate for people to have to join two entirely different groups for these closely related devices.
?
--
Ryan Flowers - W7RLF
Re: Si570 Output (Sweeperino) - 100 MHs Sine?!

 

Good job!

I'd guess the program was using that 56.32mhz frequency to (essentially, but perhaps not literally) calculate the exact frequency of the internal reference oscillator (using the contents of the factory programmed internal registers used for calibration) but not doing any kind of error checking on the ridiculous result it got. ?

My LVDS thing was apparently bogus.
I see now that your original post reported a 400mv 100mhz output.

Jerry


On Tue, Dec 12, 2017 at 09:04 pm, AndyH wrote:
IT'S WORKING!
Re: Si570 Output (Sweeperino) - 100 MHs Sine?!

 

excellent news!

- f

On Wed, Dec 13, 2017 at 10:34 AM, AndyH <ahecker@...> wrote:
IT'S WORKING!

?? ?The only difference I can see between the LVDS 3.3V Si570 variants Mouser stocks is the programmed start-up frequency (well...and freq stability and price).? I disregarded the freq because I figured the code would set it.? The device I bought has a 100 MHz startup.? In line 197 in the set-up section of code, the argument lists the device's start-up frequency.? I left the default 56.32 MHz.? That didn't work.
?si570 = new Si570(SI570_I2C_ADDRESS, 56320000);

When I changed the argument to the start-up for my Si570 (100 MHz), the chip woke up and is making fully controllable square waves.? \o/? (<-- simulated emoticon to celebrate the joy of controlled oscillation)

? ?I'm doing this to learn and I can confirm that learning is happening!? Thanks for the help, gents.? And thanks for yet another cool project, Mr. Farhan!

? ? 73 to all
? ? ?Andy


On Tue, Dec 12, 2017 at 08:18 pm, AndyH wrote:
I loaded the Razzies mod of your code.? The body of the sketch is identical to sweeperino-master.? The changes were to comment out the checks for the Si5351, and to change the set-up for the lcd from (12,11,10,9.8,7) to (12,11,7,8,9,10).? I'm using the Radiono library for the Si570.



The Si570 came from Mouser.? It has an LVDS output, 3.3VDC.? BBC000121G? (According to SiLabs, it's 121DG).? The startup freq is 100 MHz, address is 0x55.? I don't know the calibration frequency.


I agree, sir, that it doesn't appear that the code's talking to the Si570.? I broke the circuit down this afternoon and rebuilt it.? I also started from a fresh version of Arduino 1.6.12.? Behavior is the same.
Should I have ordered a pre-programmed device?? Or is there a better choice from the available versions???

Andy

On Tue, Dec 12, 2017 at 05:49 pm, Ashhar Farhan wrote:
andy,
the part is not responding to the arduino..which sketch are you using?
- f

On 13 Dec 2017 7:16 am, "AndyH" <ahecker@...> wrote:
Mike - I can confirm that the address is 55 hex.? I used the Si Lab part number look-up, and the I2C address scanner routine.? This is the specific part:


The only output I see is the clock + and clock - on pins 4 and 5.? In this circuit, Clock + (pin 4) is used and 5 is left floating.? Applying the Rigol's probe across 4 and 5 shows the same 100 MHz output as that seen from clock + and ground.? The Si 570 block diagram shows a crystal inside, but there doesn't appear to be a way to probe it from outside the case.? Is there a way to check the function of the part?? The software sets the the start-up frequency to 56.32 MHz, and later moves it to 14.5 MHz.

I thought this device outputs a square wave, and I expected the software to command the Si570 to change freqs when the display changes.? So far, neither of those things happens.? I don't know if I got a bad part, killed it somehow, or have a library problem.? I guess I'll start with libraries.? A number of others have built these things and I've not found any suggestion that they didn't 'just work'.??

Andy, KG5RKP


On Tue, Dec 12, 2017 at 03:02 pm, Michael Hagen wrote:

I have made several signal generators with 2 different PCBs I designed.? Both stand-alone with level shifting.

The big one uses the SI part with 8 Clocks, I call it "Lotsa Clocks".? It has optional I2C address bit.? And 8 Clocks.

I got all my SI parts from Mouser.? Mine respond at 0x60 or 0x61 ?? I have seen them run at the outputs with crystal not correctly connected.? I have stopped using the Tiny crystals because of soldering problems.

Check for 25 MHz small sin wave on the crystal pins.? One pin has a larger sin wave than the other.? I have made a sketch that runs one or the other or both SI parts on 0x60 and 0x61.? I have bought dozens of them, always have seen those 2 addresses?

73's

Mike, WA6ISP


On 12/12/2017 12:48 PM, AndyH wrote:
Hey folks,

? ?The executive summary is that I've assembled an Si570 generator for a Sweeperino (prereq for my scratch built ?BITX) and it's emitting a 400 mV p-p sine at 100 MHz.? I cannot adjust the frequency.? I have no idea what's happening.

? ?Details...? I verified details of the Mouser-sourced Si570 from the Sil Labs database.? The address is verified (0x55) and I can talk to the Si570 with an I2C scanner and Farhan's code (as well as the Razzie code).? Voltages are good, the layout was inspired by Farhan's build as well as the builds documented by Tony Fishpool and published in Razzie (June, 2016).? Adjusting the tuning pot makes the numbers change on the LCD. There's a light square wave on the Rigol display when the frequency is actually changing.? I can't collect this signal by probing the Arduino or the comms or power pins - its only present on the output of the Si570.

? ?Does this mean anything to the Si570 experts?
? ? Thanks,
? ? ?Andy, KG5RKP



-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...
Re: Si570 Output (Sweeperino) - 100 MHs Sine?!

 

IT'S WORKING!

?? ?The only difference I can see between the LVDS 3.3V Si570 variants Mouser stocks is the programmed start-up frequency (well...and freq stability and price).? I disregarded the freq because I figured the code would set it.? The device I bought has a 100 MHz startup.? In line 197 in the set-up section of code, the argument lists the device's start-up frequency.? I left the default 56.32 MHz.? That didn't work.
?si570 = new Si570(SI570_I2C_ADDRESS, 56320000);

When I changed the argument to the start-up for my Si570 (100 MHz), the chip woke up and is making fully controllable square waves.? \o/? (<-- simulated emoticon to celebrate the joy of controlled oscillation)

? ?I'm doing this to learn and I can confirm that learning is happening!? Thanks for the help, gents.? And thanks for yet another cool project, Mr. Farhan!

? ? 73 to all
? ? ?Andy


On Tue, Dec 12, 2017 at 08:18 pm, AndyH wrote:
I loaded the Razzies mod of your code.? The body of the sketch is identical to sweeperino-master.? The changes were to comment out the checks for the Si5351, and to change the set-up for the lcd from (12,11,10,9.8,7) to (12,11,7,8,9,10).? I'm using the Radiono library for the Si570.



The Si570 came from Mouser.? It has an LVDS output, 3.3VDC.? BBC000121G? (According to SiLabs, it's 121DG).? The startup freq is 100 MHz, address is 0x55.? I don't know the calibration frequency.


I agree, sir, that it doesn't appear that the code's talking to the Si570.? I broke the circuit down this afternoon and rebuilt it.? I also started from a fresh version of Arduino 1.6.12.? Behavior is the same.
Should I have ordered a pre-programmed device?? Or is there a better choice from the available versions???

Andy

On Tue, Dec 12, 2017 at 05:49 pm, Ashhar Farhan wrote:
andy,
the part is not responding to the arduino..which sketch are you using?
- f

On 13 Dec 2017 7:16 am, "AndyH" <ahecker@...> wrote:
Mike - I can confirm that the address is 55 hex.? I used the Si Lab part number look-up, and the I2C address scanner routine.? This is the specific part:


The only output I see is the clock + and clock - on pins 4 and 5.? In this circuit, Clock + (pin 4) is used and 5 is left floating.? Applying the Rigol's probe across 4 and 5 shows the same 100 MHz output as that seen from clock + and ground.? The Si 570 block diagram shows a crystal inside, but there doesn't appear to be a way to probe it from outside the case.? Is there a way to check the function of the part?? The software sets the the start-up frequency to 56.32 MHz, and later moves it to 14.5 MHz.

I thought this device outputs a square wave, and I expected the software to command the Si570 to change freqs when the display changes.? So far, neither of those things happens.? I don't know if I got a bad part, killed it somehow, or have a library problem.? I guess I'll start with libraries.? A number of others have built these things and I've not found any suggestion that they didn't 'just work'.??

Andy, KG5RKP


On Tue, Dec 12, 2017 at 03:02 pm, Michael Hagen wrote:

I have made several signal generators with 2 different PCBs I designed.? Both stand-alone with level shifting.

The big one uses the SI part with 8 Clocks, I call it "Lotsa Clocks".? It has optional I2C address bit.? And 8 Clocks.

I got all my SI parts from Mouser.? Mine respond at 0x60 or 0x61 ?? I have seen them run at the outputs with crystal not correctly connected.? I have stopped using the Tiny crystals because of soldering problems.

Check for 25 MHz small sin wave on the crystal pins.? One pin has a larger sin wave than the other.? I have made a sketch that runs one or the other or both SI parts on 0x60 and 0x61.? I have bought dozens of them, always have seen those 2 addresses?

73's

Mike, WA6ISP


On 12/12/2017 12:48 PM, AndyH wrote:
Hey folks,

? ?The executive summary is that I've assembled an Si570 generator for a Sweeperino (prereq for my scratch built ?BITX) and it's emitting a 400 mV p-p sine at 100 MHz.? I cannot adjust the frequency.? I have no idea what's happening.

? ?Details...? I verified details of the Mouser-sourced Si570 from the Sil Labs database.? The address is verified (0x55) and I can talk to the Si570 with an I2C scanner and Farhan's code (as well as the Razzie code).? Voltages are good, the layout was inspired by Farhan's build as well as the builds documented by Tony Fishpool and published in Razzie (June, 2016).? Adjusting the tuning pot makes the numbers change on the LCD. There's a light square wave on the Rigol display when the frequency is actually changing.? I can't collect this signal by probing the Arduino or the comms or power pins - its only present on the output of the Si570.

? ?Does this mean anything to the Si570 experts?
? ? Thanks,
? ? ?Andy, KG5RKP



-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...
Re: Ubitx only on preorder now

 

Unfortunately not....I am waiting for reply (about my orders) more than 72 hours.
Re: Si570 Output (Sweeperino) - 100 MHs Sine?!

 

All Si570's come pre-programmed for some power-up output frequency.
100mhz is a typical default, but whatever the power up frequency is, ?it is factory calibrated to be very accurate.
If you program the Si570 to a new frequency you can do so without knowing the original frequency,
but some ?programs will use knowledge of that start-up frequency and also read the power-up state of the Si570's registers
to glean the calibration information needed to?make the new output frequency more accurate.

If you can scan the Si570 and get a report back stating the i2c address, that sounds to me like the i2c interface is working.?

I'm not terribly familiar with the Sweeperino, so will defer to Farhan on this.
But looking at the schematic, am suspicious that it wants the CMOS output version of the Si570, not the LVDS version.
The description of the Sweeperino does not state what version of the Si570 is used.

Given that you have an LVDS version of the Si570, I'd ?put a 100 ohm resistor between the two
complementary LVDS output pins ?and expect about a 300mv pk-pk square wave on both of those pins.
(the datasheet says it will be 700mv differential).
That should then give an output you can use, though much smaller than a CMOS output.
What an LVDS output does with no differential load might be undefined.?

Jerry, KE7ER


On Tue, Dec 12, 2017 at 08:18 pm, AndyH wrote:
The Si570 came from Mouser.? It has an LVDS output, 3.3VDC.? BBC000121G? (According to SiLabs, it's 121DG).? The startup freq is 100 MHz, address is 0x55.? I don't know the calibration frequency.


I agree, sir, that it doesn't appear that the code's talking to the Si570.? I broke the circuit down this afternoon and rebuilt it.? I also started from a fresh version of Arduino 1.6.12.? Behavior is the same.
Should I have ordered a pre-programmed device?? Or is there a better choice from the available versions???
Re: Si570 Output (Sweeperino) - 100 MHs Sine?!

 

?

From page 2 of the supplied



Have you tried that, yet??


Sent from Yahoo Mail.




On Tuesday, December 12, 2017 11:18 PM, AndyH <ahecker@...> wrote:


I loaded the Razzies mod of your code.? The body of the sketch is identical to sweeperino-master.? The changes were to comment out the checks for the Si5351, and to change the set-up for the lcd from (12,11,10,9.8,7) to (12,11,7,8,9,10).? I'm using the Radiono library for the Si570.



The Si570 came from Mouser.? It has an LVDS output, 3.3VDC.? BBC000121G? (According to SiLabs, it's 121DG).? The startup freq is 100 MHz, address is 0x55.? I don't know the calibration frequency.


I agree, sir, that it doesn't appear that the code's talking to the Si570.? I broke the circuit down this afternoon and rebuilt it.? I also started from a fresh version of Arduino 1.6.12.? Behavior is the same.
Should I have ordered a pre-programmed device?? Or is there a better choice from the available versions???

Andy


On Tue, Dec 12, 2017 at 05:49 pm, Ashhar Farhan wrote:
andy,
the part is not responding to the arduino..which sketch are you using?
- f

On 13 Dec 2017 7:16 am, "AndyH" <ahecker@...> wrote:
Mike - I can confirm that the address is 55 hex.? I used the Si Lab part number look-up, and the I2C address scanner routine.? This is the specific part:


The only output I see is the clock + and clock - on pins 4 and 5.? In this circuit, Clock + (pin 4) is used and 5 is left floating.? Applying the Rigol's probe across 4 and 5 shows the same 100 MHz output as that seen from clock + and ground.? The Si 570 block diagram shows a crystal inside, but there doesn't appear to be a way to probe it from outside the case.? Is there a way to check the function of the part?? The software sets the the start-up frequency to 56.32 MHz, and later moves it to 14.5 MHz.

I thought this device outputs a square wave, and I expected the software to command the Si570 to change freqs when the display changes.? So far, neither of those things happens.? I don't know if I got a bad part, killed it somehow, or have a library problem.? I guess I'll start with libraries.? A number of others have built these things and I've not found any suggestion that they didn't 'just work'.??

Andy, KG5RKP


On Tue, Dec 12, 2017 at 03:02 pm, Michael Hagen wrote:
I have made several signal generators with 2 different PCBs I designed.? Both stand-alone with level shifting.
The big one uses the SI part with 8 Clocks, I call it "Lotsa Clocks".? It has optional I2C address bit.? And 8 Clocks.
I got all my SI parts from Mouser.? Mine respond at 0x60 or 0x61 ?? I have seen them run at the outputs with crystal not correctly connected.? I have stopped using the Tiny crystals because of soldering problems.
Check for 25 MHz small sin wave on the crystal pins.? One pin has a larger sin wave than the other.? I have made a sketch that runs one or the other or both SI parts on 0x60 and 0x61.? I have bought dozens of them, always have seen those 2 addresses?
73's
Mike, WA6ISP

On 12/12/2017 12:48 PM, AndyH wrote:
Hey folks,

? ?The executive summary is that I've assembled an Si570 generator for a Sweeperino (prereq for my scratch built ?BITX) and it's emitting a 400 mV p-p sine at 100 MHz.? I cannot adjust the frequency.? I have no idea what's happening.

? ?Details...? I verified details of the Mouser-sourced Si570 from the Sil Labs database.? The address is verified (0x55) and I can talk to the Si570 with an I2C scanner and Farhan's code (as well as the Razzie code).? Voltages are good, the layout was inspired by Farhan's build as well as the builds documented by Tony Fishpool and published in Razzie (June, 2016).? Adjusting the tuning pot makes the numbers change on the LCD. There's a light square wave on the Rigol display when the frequency is actually changing.? I can't collect this signal by probing the Arduino or the comms or power pins - its only present on the output of the Si570.

? ?Does this mean anything to the Si570 experts?
? ? Thanks,
? ? ?Andy, KG5RKP



-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...
Re: Si570 Output (Sweeperino) - 100 MHs Sine?!

 

I'm not aware of anything Raduino that would talk to an Si570

Jerry


On Tue, Dec 12, 2017 at 08:18 pm, AndyH wrote:
I'm using the Radiono library for the Si570.
Re: Si570 Output (Sweeperino) - 100 MHs Sine?!

 

I loaded the Razzies mod of your code.? The body of the sketch is identical to sweeperino-master.? The changes were to comment out the checks for the Si5351, and to change the set-up for the lcd from (12,11,10,9.8,7) to (12,11,7,8,9,10).? I'm using the Radiono library for the Si570.



The Si570 came from Mouser.? It has an LVDS output, 3.3VDC.? BBC000121G? (According to SiLabs, it's 121DG).? The startup freq is 100 MHz, address is 0x55.? I don't know the calibration frequency.


I agree, sir, that it doesn't appear that the code's talking to the Si570.? I broke the circuit down this afternoon and rebuilt it.? I also started from a fresh version of Arduino 1.6.12.? Behavior is the same.
Should I have ordered a pre-programmed device?? Or is there a better choice from the available versions???

Andy


On Tue, Dec 12, 2017 at 05:49 pm, Ashhar Farhan wrote:
andy,
the part is not responding to the arduino..which sketch are you using?
- f

On 13 Dec 2017 7:16 am, "AndyH" <ahecker@...> wrote:
Mike - I can confirm that the address is 55 hex.? I used the Si Lab part number look-up, and the I2C address scanner routine.? This is the specific part:


The only output I see is the clock + and clock - on pins 4 and 5.? In this circuit, Clock + (pin 4) is used and 5 is left floating.? Applying the Rigol's probe across 4 and 5 shows the same 100 MHz output as that seen from clock + and ground.? The Si 570 block diagram shows a crystal inside, but there doesn't appear to be a way to probe it from outside the case.? Is there a way to check the function of the part?? The software sets the the start-up frequency to 56.32 MHz, and later moves it to 14.5 MHz.

I thought this device outputs a square wave, and I expected the software to command the Si570 to change freqs when the display changes.? So far, neither of those things happens.? I don't know if I got a bad part, killed it somehow, or have a library problem.? I guess I'll start with libraries.? A number of others have built these things and I've not found any suggestion that they didn't 'just work'.??

Andy, KG5RKP


On Tue, Dec 12, 2017 at 03:02 pm, Michael Hagen wrote:

I have made several signal generators with 2 different PCBs I designed.? Both stand-alone with level shifting.

The big one uses the SI part with 8 Clocks, I call it "Lotsa Clocks".? It has optional I2C address bit.? And 8 Clocks.

I got all my SI parts from Mouser.? Mine respond at 0x60 or 0x61 ?? I have seen them run at the outputs with crystal not correctly connected.? I have stopped using the Tiny crystals because of soldering problems.

Check for 25 MHz small sin wave on the crystal pins.? One pin has a larger sin wave than the other.? I have made a sketch that runs one or the other or both SI parts on 0x60 and 0x61.? I have bought dozens of them, always have seen those 2 addresses?

73's

Mike, WA6ISP


On 12/12/2017 12:48 PM, AndyH wrote:
Hey folks,

? ?The executive summary is that I've assembled an Si570 generator for a Sweeperino (prereq for my scratch built ?BITX) and it's emitting a 400 mV p-p sine at 100 MHz.? I cannot adjust the frequency.? I have no idea what's happening.

? ?Details...? I verified details of the Mouser-sourced Si570 from the Sil Labs database.? The address is verified (0x55) and I can talk to the Si570 with an I2C scanner and Farhan's code (as well as the Razzie code).? Voltages are good, the layout was inspired by Farhan's build as well as the builds documented by Tony Fishpool and published in Razzie (June, 2016).? Adjusting the tuning pot makes the numbers change on the LCD. There's a light square wave on the Rigol display when the frequency is actually changing.? I can't collect this signal by probing the Arduino or the comms or power pins - its only present on the output of the Si570.

? ?Does this mean anything to the Si570 experts?
? ? Thanks,
? ? ?Andy, KG5RKP



-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...
Re: VFO Instability Ver3B #bitx20help

 

Farhan jee
?he is discussing regarding bitx20 ver3B. It is with discrete components and not SMD jee


regards
Sarma
?

On Wed, Dec 13, 2017 at 7:14 AM, Ashhar Farhan <farhanbox@...> wrote:
The vfo is drifting due to heating. The heat on the board is coming from the predriver, driver and the vfo output stage. If you replace the 2n3904 from smd to leaded, it will make the board run cooler.
The other, simpler thing to do, is make a simple, one fet vfo with a variable capacitor. Bill did that.
-?

On 12 Dec 2017 7:52 am, "Mvs Sarma" <mvssarma@...> wrote:
Imagine using a fet buffer for counter instead of present NPN transistor.
?The biasing mmethods change and we only need to have a 100k or so termination of gate.
?The dee cias could well be removed.

?try once and All the best
?regards
?sarma
?vu3zmv

?

regards
Sarma
?

On Tue, Dec 12, 2017 at 6:20 AM, <paulsmi55@...> wrote:
Well, I reduced the coupling out to the freq counter to around 20pf effective which was the lowest that would still feed adequate signal to the counter. But still I have the instability the moment I connect it up. The VFO is pulled down and sometime just runs at random frequencies. Wondering if there is something wrong with the buffer itself. I am going to try pick off a signal from the buffer stage Q6 output to the mixer and see if that perhaps works. Otherwise I may have to build another stage of buffering or maybe even try another counter. Really don't want to abandon my FLL-free VFO as it is very stable without the counter connected.



Re: Ubitx only on preorder now

 

We changed on the text on the buy page, where it said that it is now on back-order. we mentioned that the shipping would start after christmas.?
see here:

while ordering, if you read it that it was on back order, then it is on back order, if not, then you are going to get it shipped during this week. i guess a few hundred have already left the shipping.

i don't handle this stuff, nor is this really the forum to discuss commercials, but we are in a kind of an unusual situation here, so i keep asking the gang at hfsignals for updates and post them here. if you have any query related to shipping etc. it is best to write to hfsignals@.... they usually reply within 24 hours.

- f


On Wed, Dec 13, 2017 at 8:35 AM, William R Maxwell <wrmaxwell@...> wrote:

No, just directing your attention to where the cutoff was announced.


On 13/12/2017 1:13 PM, Ron Notarius WN3VAW wrote:
Excuse me?? Did you just blame me for not knowing something that wasn't posted on the website when I placed the order?

From: [email protected] [mailto:[email protected]] On Behalf Of William R Maxwell
Sent: Tuesday, December 12, 2017 7:46 PM
To: [email protected]
Subject: Re: [BITX20] Ubitx only on preorder now

The cutoff was several days ago, Ron. It was announced on this group, if you read back a few days.


On 13/12/2017 11:24 AM, Ron Notarius WN3VAW wrote:
Well, as someone who just ordered the uBITX yesterday morning, and who just joined the group this afternoon, it would be helpful to know when the cutoff is or was.
?
I would hate to find out now that I'm?on backorder.?
?
73, ron w3wn
From: [email protected] [mailto:[email protected]] On Behalf Of q q via Groups.Io
Sent: Tuesday, December 12, 2017 5:53 PM
To: [email protected]
Subject: Re: [BITX20] Ubitx only on preorder now

Look at the date/time the post/note was sent.

Did you order before that date and time?

If yes then you are in the que.

If no then you are on B/O.

My Bitx 40 has been a fun project and a great little rig to operate.

I'm sure the uBitx will be the same.

Bob?
N1ETS

?


Virus-free.



Re: Ubitx only on preorder now

 

¿ªÔÆÌåÓý

No, just directing your attention to where the cutoff was announced.


On 13/12/2017 1:13 PM, Ron Notarius WN3VAW wrote:

Excuse me?? Did you just blame me for not knowing something that wasn't posted on the website when I placed the order?

From: [email protected] [mailto:[email protected]] On Behalf Of William R Maxwell
Sent: Tuesday, December 12, 2017 7:46 PM
To: [email protected]
Subject: Re: [BITX20] Ubitx only on preorder now

The cutoff was several days ago, Ron. It was announced on this group, if you read back a few days.


On 13/12/2017 11:24 AM, Ron Notarius WN3VAW wrote:
Well, as someone who just ordered the uBITX yesterday morning, and who just joined the group this afternoon, it would be helpful to know when the cutoff is or was.
?
I would hate to find out now that I'm?on backorder.?
?
73, ron w3wn
From: [email protected] [mailto:[email protected]] On Behalf Of q q via Groups.Io
Sent: Tuesday, December 12, 2017 5:53 PM
To: [email protected]
Subject: Re: [BITX20] Ubitx only on preorder now

Look at the date/time the post/note was sent.

Did you order before that date and time?

If yes then you are in the que.

If no then you are on B/O.

My Bitx 40 has been a fun project and a great little rig to operate.

I'm sure the uBitx will be the same.

Bob?
N1ETS

?


Virus-free.


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