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Re: SI5351 simultaneous clock changes #ubitx-help

Jerry Gaffke
 

When I wrote that code, I assumed the output clock would be jumping around like crazy as the registers got loaded.
This chip is primarily out there to replace a bunch of the older fixed 4 pin crystal oscillators after all.
But amazingly enough, I found I could update the clock in 1hz increments and it swept cleanly in frequency just like an analog vfo.
Not so much as a runt clock pulse, no suggestion of any disruption when the frequency changed.

The only hint of this in the datasheet or AN619 is the statement in the upper right of the si5351 datasheet
stating "Glitchless Frequency Changes".
Nothing in the register descriptions says exactly when or how the clock frequency changes at the output pin.

My best guess is that the switch will occur when the 8'th register of that burst write occurs.
I don't really know.
You could do a Serial.write() plus a 5 second delay after each register write,
see when the frequency does change.

Could probably load up all the registers for both clocks up to that final register, 
then quickly write both final registers.  
Since the two final registers are not consecutive, you can't do a burst write.
Single register writes involve sending out the i2c address, register address, and data, about 30 i2c clocks.
Max i2c clock rate is 400khz (I think the Nano defaults to 100khz), so 30/400khz = 75us between the two clock updates.

Let us know what you find out.

Not obvious to me why you need to change the gain while transmitting.
Just shut down the transmitter for a few milliseconds when transitioning the power level.

Jerry, KE7ER





On Sun, Apr 1, 2018 at 10:56 pm, John wrote:
Taking a short-cut from reading the SI5351 datasheet and after going through Jerry's code in the ubitx_si5351 source, I believe that two clocks can be changed simultaneously.

The purpose of this is for using the 1st IF shift to produce a TX gain control. I would like to avoid shifting the transmit frequency even for a few micro seconds if I use two successive  calls to the si5351bx_setfreq() method. 

My understanding is that I can write the data to the two series of (8 + 1) registers, then do a clock enable for all the enabled clocks with  i2cWrite(3, si5351bx_clken) to affect the changes in two clocks at the same time. Since I would shift both by the same value, I would expect the result to be virtually simultaneous.

Am I correct or is there a better method?

Thanks and 73, John (VK2ETA)

Re: RD16HHF1 power curve flattening...some

John <passionfruit88@...>
 

Hello Jerry,

I understand the reasons why we are in the current configuration. It made sense.

These AD8307 are cheap log amps.

Thanks for the information.

73, John

SI5351 simultaneous clock changes #ubitx-help

John <passionfruit88@...>
 

Taking a short-cut from reading the SI5351 datasheet and after going through Jerry's code in the ubitx_si5351 source, I believe that two clocks can be changed simultaneously.

The purpose of this is for using the 1st IF shift to produce a TX gain control. I would like to avoid shifting the transmit frequency even for a few micro seconds if I use two successive  calls to the si5351bx_setfreq() method. 

My understanding is that I can write the data to the two series of (8 + 1) registers, then do a clock enable for all the enabled clocks with  i2cWrite(3, si5351bx_clken) to affect the changes in two clocks at the same time. Since I would shift both by the same value, I would expect the result to be virtually simultaneous.

Am I correct or is there a better method?

Thanks and 73, John (VK2ETA)

Re: US Purchasers of the µBITX

Steven Read
 

Thanks to everybody who replied plus the heads up on the diode polarity being wrong in the schematic. 

On Sun, Apr 1, 2018 at 11:46 PM Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io> wrote:
My understanding is the DHL upgrade was only on the first batch, when the post office there
complained of being overloaded with hundreds of boxes.
And only to the US, as many other countries have exorbitant fees on incoming DHL deliveries.

Perhaps this occurred on other occasions as well when a large glut of orders went out.
But don't count on it.

Jerry


On Sun, Apr 1, 2018 at 07:20 pm, Terry Morris wrote:
I ordered mine to be shipped via India mail to United States Mail but Farhan shipped mine by DHL to NE Ohio. No problem with shipping.
 

--

Steven Read - ab9ol - Dublin, Indiana (em79jt)

Re: US Purchasers of the µBITX

Jerry Gaffke
 

My understanding is the DHL upgrade was only on the first batch, when the post office there
complained of being overloaded with hundreds of boxes.
And only to the US, as many other countries have exorbitant fees on incoming DHL deliveries.

Perhaps this occurred on other occasions as well when a large glut of orders went out.
But don't count on it.

Jerry


On Sun, Apr 1, 2018 at 07:20 pm, Terry Morris wrote:
I ordered mine to be shipped via India mail to United States Mail but Farhan shipped mine by DHL to NE Ohio. No problem with shipping.
 

Re: US Purchasers of the µBITX

freefuel@...
 

my uBITX shipped to Eastern Pennsylvania with no actual issues, the DHL delivery person did gripe that my apartment number was not indicated on the box. however he has delivered for me before so he was able to figure it out.  

-Justin N2TOH

Re: RD16HHF1 power curve flattening...some

Jerry Gaffke
 

A search for "si5351 main board" in this forum will show it's been suggested a half dozen times,
starting with post 20455.  I'm still hoping it will happen someday. 
Can ship with a Nano and perhaps a 2x16 i2c LCD so the rig is easy to get going, 
but also easy to move on to bigger and better processors and displays. 
Most of us can find plenty of uses for a spare Nano and LCD.

Of course, the current Raduino is nice in that it eliminates a wiring harness from Raduino to uBitx.
And I understand the wisdom of avoiding unnecessary changes once something works.

But I'd prefer the si5351 on the main board. 
And maybe pads for an optional ad8307, for use as an RF probe, s-meter, and sweeperino.

The $0.20 ad8307's on ebay apparently work just fine.
Search for "20pcs ad8307"

Jerry, KE7ER



On Sun, Apr 1, 2018 at 06:10 pm, Ashhar Farhan wrote:
You are right about the, Si5531. The way it panned out was that first there was the. Bitx40 with analog vfo. That was unstable for the digital modes, so we made the raduino. Then, because there was a raduino, the ubitx happened.     

On Mon, 2 Apr 2018, 05:22 John, <passionfruit88@...> wrote:
While we are on the wishes, it would have made my modifications much simpler if the Si5351 was on the main board as it would allow to extend the I2C bus to whatever micro-controller we wished to use.

Re: US Purchasers of the µBITX

Terry Morris
 

I ordered mine to be shipped via India mail to United States Mail but Farhan shipped mine by DHL to NE Ohio. No problem with shipping.


Terry - KB8AMZ
Brimfield Twp, OH  USA
Linux User# 412308, Ubuntu User# 34905
OSs: LM18.2 64bit, Ubuntu 16.04, tahrPup64 64bit, Raspian
Orgs: PCL70-FOP, NTHS, ALUG, ARRL, PCARS#78, NAQCC#6668, NO-QRP-C, QRP-ARCI#8855, SKCC#14195, USN 1965-1969 AG3

I chair the PCARS CW/QRP SIG and Linux for Hams SIG, second and fifth Tuesday

my computer, my opinion

On Sun, Apr 1, 2018 at 9:30 PM, Steven Read <steven.mailroom@...> wrote:
I have had mixed results purchasing some items from the UK & it appears from their website (hfsignals.com) there have been some issues with units shipped via DHL to the EU. I am looking for feedback from this company as how things went for you. The company website also seems to indicate there are additional customs charges if DHL is used.

Sorry but the budget is not what it once was.
--

Steven Read - ab9ol - Dublin, Indiana (em79jt)


Re: Open letter to the uBITX community from Jim Sheldon, W0EB. #ubitx

Doug W
 

None of this is as fun as Microsoft v MikeRoweSoft. 

Re: Open letter to the uBITX community from Jim Sheldon, W0EB. #ubitx

Jerry Gaffke
 

Henry Ford III did.
About 75 years after Lockheed formed theirs.
You can google it.   

I'm expecting a nasty-gram from Alphabet's lawyers anytime now.


On Sun, Apr 1, 2018 at 02:28 pm, Dexter N Muir wrote:
... similarly uneddicatified... Didn't Henry Ford have a 'skunk works'?

Re: RD16HHF1 power curve flattening...some

Kees T
 

I personally prefer a max of ~10W also (battery power, etc) and the RD transistors are definitely intended for "RF" use and work great on 10m/15m (vs the 510s which essentially quit around 18MHz). I was wondering if anyone has tried the RD06HHF1 RF transistors ? 

73 Kees K5BCQ

Re: US Purchasers of the µBITX

Chuck, N1KGY
 

My first unit arrived in Eastern NC [first week of Feb] on the 4th day after I received the DHL shipping notification.  No customs fees or other issues.
Now waiting on the three I ordered in late February... 

Re: US Purchasers of the µBITX

Jim Sheldon
 

That is apparently NOT the case with DHL for US purchasers.  My 3 cleared customs and were delivered by DHL couriers with absolutely NO extra charges.

W0EB

------ Original Message ------
From: "Steven Read" <steven.mailroom@...>
Sent: 4/1/2018 8:30:38 PM
Subject: [BITX20] US Purchasers of the µBITX

I have had mixed results purchasing some items from the UK & it appears from their website (hfsignals.com) there have been some issues with units shipped via DHL to the EU. I am looking for feedback from this company as how things went for you. The company website also seems to indicate there are additional customs charges if DHL is used.

Sorry but the budget is not what it once was.
--

Steven Read - ab9ol - Dublin, Indiana (em79jt)

Re: uBITX BAT54SL: diode ring mixer direction question

Paul Galburt - K2AYZ
 

If you really want to know, test the part with an multi-meter on the "diode" setting. That will resolve the polarity for sure.

Re: US Purchasers of the µBITX

 

DHL shipped without any hitches. From India to NW Pennsylvania within 3 days. No custom fees.

Re: Arduino For Idiots?

Paul Galburt - K2AYZ
 

I have been programming Arduinos and other small microcontrollers for some years. I don't see the benefit of using a web-based IDE/Editor/uploader. The browser just adds another layer of potential instability.

Web-based tools make sense for functions that are otherwise expensive or difficult to install. For example, ilovepdf.com is a nice set of utilities and hard to duplicate in an installed app.

I use the standard Arduino IDE (free and reasonalble to install) and have had only minor problems over the years. One common goof is using a USB cable that is not designed for data.

Re: Open letter to the uBITX community from Jim Sheldon, W0EB. #ubitx

Supratik and Paromita Sanatani
 

An Indian Company calling itself VISA and dealing with metals and energy could successfully defend itself against copyright infringement charges brought by the US Credit card company VISA
Supratik VU2IFB

On Sun 1 Apr, 2018, 10:12 PM David, <dokrent@...> wrote:
It would be interesting to challenge the trademark as Lockheed has allowed it to fall into general use. Many companies and people use the term to illustrate a type of behavior and not to refer to Lockheed. Just as it would be interesting to see if the Google trademark would hold up as they have let it become a verb. Trademarks must be defended or they can fall. Also, I believe, in the US first in commerce and not first to register establishes trademark. Yes, one can have two of the same names if they exist in two separate industries, especially if the individuals are not in the others’ industry. Of course, what do I know.



Re: BITX QSO Afternoon/Evening, Sunday, April 1, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.

Tom VE3THR
 

Well things picked up nicely this evening, had confirmed qso's with KN4AIE Rick in TN, N6ORS Keith in WI, N8DLP Kevin in OH, AC9PD Larry in WI, W1LY Willy in RI, WA2FZW John in MA and WI1B Ken in Ma. Congratulations to a couple of 1st time uBITXer's. Some great sounding, some at the noise level and some light audio. Conditions were a heck of a lot better today than in the past months. Keep working them BITX's. So far the BITX40 is proving to be a solid monoband rig.
73 Tom VE3THR/p in EN96

US Purchasers of the µBITX

Steven Read
 

I have had mixed results purchasing some items from the UK & it appears from their website (hfsignals.com) there have been some issues with units shipped via DHL to the EU. I am looking for feedback from this company as how things went for you. The company website also seems to indicate there are additional customs charges if DHL is used.

Sorry but the budget is not what it once was.
--

Steven Read - ab9ol - Dublin, Indiana (em79jt)

Re: BITX QSO Afternoon/Evening, Sunday, April 1, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.

Doug W
 

I could hear several conversations.  Didn't catch any call signs.   Didn't hear any responses to my CQ calls.
Doug
AC9RZ