Date   
Re: Blown by nearby transceiver #bitx40help

David Lacey
 

Sorry...but I agree with Jack`s comments. If any transceiver was intended to be fitted to a plastic case.....all major
rig manufacturers would be using them already. It is plain common sense to shield any RF generating device.

HF signals write-up on the rig states:
What is included and what is not
"The boards are sold at a low price to encourage more people to build them. Due to high postage
cost of including heavy items like speakers and metal box, these are not part of the kit. You will have
to supply your own project box, speaker,mic, power supply, antenna etc."
Dave
G4JBE

On 12/02/2018 17:18, Jack Purdum via Groups.Io wrote:
No, I was dead serious.

Suggesting that someone has to be crazy to use a plastic case for an xcvr is uncalled for. Much of my work is done with an eye to the ham (or potential ham) who has limited income for our hobby. (See my intro to the Forty-9er article, March, 2016, QST.) There are a lot of people who cannot afford a $50 Hammond aluminum case. There are others who don't have the tools to work with aluminum; even a $30 nibbling tool is out of reach. Some who choose a plastic case may do so for economic reasons, but it could also they want it as light as possible and, when working a SOTA location, they're not overly-concerned about stray RFI. It may be they just like the way a plastic case looks. The popularity of 3-D printed cases is an example. Indeed, we all have read about hams who have mounted their BITX in the plastic case it came in. Others have used cigar boxes. I used an acrylic case for the Forty-9er because I wanted the visitors at the next Field Day to see that a viable rig does not have to be complicated.

So, no, I don't think it was called for because there are a lot of viable reasons for not using a metal case and to imply that someone who does needs to wear a foil hat is uncalled for.

Jack, W8TEE




Re: Blown by nearby transceiver #bitx40help

chris gress <Chrisg0wfh@...>
 

I used this copper tape in side my plastic cases for my bitx cheep as chips £1 a box chris

On 12 Feb 2018 18:19, "David Lacey via Groups.Io" <g4jbe=yahoo.co.uk@groups.io> wrote:
Sorry...but I agree with Jack`s comments. If any transceiver was intended to be fitted to a plastic case.....all major
rig manufacturers would be using them already. It is plain common sense to shield any RF generating device.

HF signals write-up on the rig states:
What is included and what is not
"The boards are sold at a low price to encourage more people to build them. Due to high postage
cost of including heavy items like speakers and metal box, these are not part of the kit. You will have
to supply your own project box, speaker,mic, power supply, antenna etc."
Dave
G4JBE

On 12/02/2018 17:18, Jack Purdum via Groups.Io wrote:
No, I was dead serious.

Suggesting that someone has to be crazy to use a plastic case for an xcvr is uncalled for. Much of my work is done with an eye to the ham (or potential ham) who has limited income for our hobby. (See my intro to the Forty-9er article, March, 2016, QST.) There are a lot of people who cannot afford a $50 Hammond aluminum case. There are others who don't have the tools to work with aluminum; even a $30 nibbling tool is out of reach. Some who choose a plastic case may do so for economic reasons, but it could also they want it as light as possible and, when working a SOTA location, they're not overly-concerned about stray RFI. It may be they just like the way a plastic case looks. The popularity of 3-D printed cases is an example. Indeed, we all have read about hams who have mounted their BITX in the plastic case it came in. Others have used cigar boxes. I used an acrylic case for the Forty-9er because I wanted the visitors at the next Field Day to see that a viable rig does not have to be complicated.

So, no, I don't think it was called for because there are a lot of viable reasons for not using a metal case and to imply that someone who does needs to wear a foil hat is uncalled for.

Jack, W8TEE




Re: Bitx40 - receiver works great, but do not transmit #bitx40help

M Garza <mgarza896@...>
 

Ivan,
If you do not want to go through the trouble of getting SMD transistors, you could always use a regular 2N3904 or 2N2222 transistor.  Either will work.

Great work!

Marco - KG5PRT

On Mon, Feb 12, 2018 at 12:02 PM, Ivan Ilyichev <ilyichev.ivan@...> wrote:
I built a RF probe according to this schematics: http://full-chip.net/uploads/posts/2012-12/full_chip_net_shema.gif . Also i was tortured my family with loud HALLO sound and i add simple CW mod - unbalancing diode mixer after T4 with 4k7 resistor to 5 connected to 5 volts of RADUINO.
At 50 ohm dummy load i measure 16.5 volts - as i calculated it means a little more than 5 watts. This is in factory position of RV136. In upper top position of RV136 a measured 17 volts that means 6 watts of power. It is nearly good.
R141 resistance is 10 ohm as needed.
Also i checked Q7 - Q9 transistors. Q7 - Q8 seems to be ok, but Q9 - not. Voltages of Q9 are: collector: 9.03 volts, base: 4.44 volts and emitter 4.51 volts. Seems to be a strange values, i guess i burn it out when connect DDS incorrect way. Tomorrow i try to buy new MMBT3904 transistors and change it.
Thank you all for answers, you helps me a lot.


Re: Second batch of uBITX shipping? #ubitx

K5ESS
 

Got my uBITX yesterday via DHL (yes on Sunday). Didn’t have to sign.  Just a big yellow envelope left at my doorstep.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Art Howard
Sent: Monday, February 12, 2018 8:52 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Second batch of uBITX shipping?

 

Steve

 I should get mine today I noticed that it's in Minneapolis now.

  Do you know if the package has to be signed for ?

Art

 

On 12 Feb 2018 7:59 am, "S. Porter" <srporter@...> wrote:

Art,

Just got off the phone with a DHL rep who said DHL will deliver here, not USPS. Your mileage may vary. The package is on the move again this morning! :-)

73,
Steve

On Sat, Feb 10, 2018 at 04:08 pm, Art Howard wrote:

I also ordered mine on the 18th and mine is also sitting in Cincinnati for the last day.

 It is indicated that once it hits the USA it is USPS. Was supposed to deliver this last Friday so I figure maybe Tuesday here in Minnesota.

 

Re: Second batch of uBITX shipping? #ubitx

Art Howard
 

I called DHL and they said they require all packages to be signed for even if it does come by USPS

On 12 Feb 2018 11:05 am, "at91r40008" <yvon@...> wrote:
If it is coming with USPS from outside the USA you most
probably have to sign for.
That is what the postman tells me each time I get a package
from China.
I rarely get DHL and it varies.
--
73, Yvon NU6I

Re: Si5351 Programming Flowchart

JuanCarlos
 

Thx, good to know.
73's Jc

“If you have a penny and I have a penny and we exchange pennies, you still have one cent and I still have one cent.  But if you have an idea and I have an idea and we exchange ideas, you now have two ideas and I now have two ideas.” 

Mr. Juan Carlos Berberena Gonzalez, BSc.
WJ6C exCO6BG 


2018-02-12 12:48 GMT-05:00 Jerry Gaffke via Groups.Io <jgaffke@...>:

That flowchart describes how to code low level si5351 routines,
not how to use those routines.  So probably not of much intereset
to most of the readers of this forum.

Allard's Bitx40 firmware and in Farhan's uBitx firmware currently use the si5351bx routines,
to use them just embed the two functions si5351bx_init() and si5351bx_setfreq() into your sketch.
Call si5351bx_init() once at startup, all three clk's get initialized to the off state.
Call si5351bx_setfreq(clknum, fout) each time you wish to change the frequency of a clock
with clknum a value of 0, 1, or 2, and fout in hz between 500khz and 109mhz.
Use a frequency of 0 hz if you wish to turn one of the clocks back off.
To calibrate, adjust the value of si5351bx_vcoa and then call si5351bx_setfreq() for each of the active clocks.

Resolution is to one hz, since fout in hz is an integer.  (Though we could go to a fractional fixed point representation if necessary.)
The accuracy of the calculations is down around 1ppm, considerably better than the stability of the 25mhz reference oscillator.

There has been one minor bug found since the si5351bx code was made available last summer, this line:
    i2cWrite(183, SI5351BX_XTALPF << 6);
should be changed to this:
    i2cWrite(183, (SI5351BX_XTALPF << 6) | 0x12);
to agree with the recommendations in the SiLabs apnote AN619
This may improve phase noise, though I have not heard any reports of it making any perceivable difference.

The code from Pavel (and the code from Etherkit or G0UPL) will allow you to exceed the 109mhz max frequency
if that is of interest.  There may be differences in phase noise, though again I am not aware of this being perceptible by
anyone in this forum. 

Jerry, KE7ER



On Mon, Feb 12, 2018 at 09:07 am, JuanCarlos Berberena Gonzalez wrote:
Hi Guys
A weeks ago Josué Marin-CO7RR- sent me this information to share with my group.
I am only try to be a good 'USER" testing some interesting project I can get on the web and afterward share it with my group.
Now Pavel-CO7WT- sent me this link and I think is a good idea to share with all of you.
 
https://nt7s.com/2018/02/si5351-programming-flowchart/


Re: Blown by nearby transceiver #bitx40help

Arv Evans
 

Jerry KE7ER

While tinfoil (even the tinfoil hat) can lessen exposure to static charges, how
much effect does it have on electro-magnetic energy.  Seems that a thick steel
chassis (or hat)  might be better for limiting both ES and EM signal levels.

Arv  K7HKL
_._

On Mon, Feb 12, 2018 at 10:54 AM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
Jury is still out as to how those parts got blown, and I am genuinely curious.
Most commercial radio gear that comes in plastic cases uses some sort of thin metallic film
on the interior to provide shielding, and if this is of concern I do think gluing tinfoil to the inside
surface is a reasonable thing to do.

My apologies if anyone was offended by the reference to a tinfoil hat.
Though as Raj has pointed out, that's not necessarily a bad idea either.

Jerry, KE7ER

On Mon, Feb 12, 2018 at 09:18 am, Jack Purdum wrote:
No, I was dead serious.
 
Suggesting that someone has to be crazy to use a plastic case for an xcvr is uncalled for. Much of my work is done with an eye to the ham (or potential ham) who has limited income for our hobby. (See my intro to the Forty-9er article, March, 2016, QST.) There are a lot of people who cannot afford a $50 Hammond aluminum case. There are others who don't have the tools to work with aluminum; even a $30 nibbling tool is out of reach. Some who choose a plastic case may do so for economic reasons, but it could also they want it as light as possible and, when working a SOTA location, they're not overly-concerned about stray RFI. It may be they just like the way a plastic case looks. The popularity of 3-D printed cases is an example. Indeed, we all have read about hams who have mounted their BITX in the plastic case it came in. Others have used cigar boxes. I used an acrylic case for the Forty-9er because I wanted the visitors at the next Field Day to see that a viable rig does not have to be complicated.
 
So, no, I don't think it was called for because there are a lot of viable reasons for not using a metal case and to imply that someone who does needs to wear a foil hat is uncalled for.
 


Re: Second batch of uBITX shipping? #ubitx

Gary Shriver
 

When did you order?

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of K5ESS
Sent: Monday, February 12, 2018 10:33 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Second batch of uBITX shipping?

 

Got my uBITX yesterday via DHL (yes on Sunday). Didn’t have to sign.  Just a big yellow envelope left at my doorstep.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Art Howard
Sent: Monday, February 12, 2018 8:52 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Second batch of uBITX shipping?

 

Steve

 I should get mine today I noticed that it's in Minneapolis now.

  Do you know if the package has to be signed for ?

Art

 

On 12 Feb 2018 7:59 am, "S. Porter" <srporter@...> wrote:

Art,

Just got off the phone with a DHL rep who said DHL will deliver here, not USPS. Your mileage may vary. The package is on the move again this morning! :-)

73,
Steve

On Sat, Feb 10, 2018 at 04:08 pm, Art Howard wrote:

I also ordered mine on the 18th and mine is also sitting in Cincinnati for the last day.

 It is indicated that once it hits the USA it is USPS. Was supposed to deliver this last Friday so I figure maybe Tuesday here in Minnesota.

 

Re: RadI2Cino - I2C replacement for the uBITX Raduino #ubitx

Jim Sheldon
 

Ordering for the option 2 boards is temporarily closed - out of boards to make them with.  The response was far more than expected.  There may be 4 or 5 bare boards (option 1) left but those are rapidly disappearing as well. 

Anticipate more boards in about 15 days but until then the order window is closed.

I'll announce when they are again available in this thread here.

Jim Sheldon, W0EB

Re: Second batch of uBITX shipping? #ubitx

S. Porter <srporter@...>
 

Art,

Package just arrived via DHL courier.

I did have to sign for it.

73,
Steve

Re: Second batch of uBITX shipping? #ubitx

Art Howard
 

It's here...🤣
Ordered on December 18th.


On 12 Feb 2018 8:51 am, "Art Howard" <k0kuk.vhf@...> wrote:
Steve
 I should get mine today I noticed that it's in Minneapolis now.
  Do you know if the package has to be signed for ?
Art

On 12 Feb 2018 7:59 am, "S. Porter" <srporter@...> wrote:
Art,

Just got off the phone with a DHL rep who said DHL will deliver here, not USPS. Your mileage may vary. The package is on the move again this morning! :-)

73,
Steve

On Sat, Feb 10, 2018 at 04:08 pm, Art Howard wrote:
I also ordered mine on the 18th and mine is also sitting in Cincinnati for the last day.
 It is indicated that once it hits the USA it is USPS. Was supposed to deliver this last Friday so I figure maybe Tuesday here in Minnesota.
 

Re: Second batch of uBITX shipping? #ubitx

Art Howard
 

Got mine today. ordered December 18th. Arrived at my place via Courier Service 


On 26 Jan 2018 2:37 am, "dj0hf" <dj0hf@...> wrote:
Ordered on the 16th December - Nothing yet.

73
Ian
DJ0HF/G3ULO




Re: Second batch of uBITX shipping? #ubitx

K5ESS
 

Ordered on 18 Dec.  Shipped 7 Feb.  Received 11 Feb.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Gary Shriver
Sent: Monday, February 12, 2018 12:58 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Second batch of uBITX shipping?

 

When did you order?

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of K5ESS
Sent: Monday, February 12, 2018 10:33 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Second batch of uBITX shipping?

 

Got my uBITX yesterday via DHL (yes on Sunday). Didn’t have to sign.  Just a big yellow envelope left at my doorstep.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Art Howard
Sent: Monday, February 12, 2018 8:52 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Second batch of uBITX shipping?

 

Steve

 I should get mine today I noticed that it's in Minneapolis now.

  Do you know if the package has to be signed for ?

Art

 

On 12 Feb 2018 7:59 am, "S. Porter" <srporter@...> wrote:

Art,

Just got off the phone with a DHL rep who said DHL will deliver here, not USPS. Your mileage may vary. The package is on the move again this morning! :-)

73,
Steve

On Sat, Feb 10, 2018 at 04:08 pm, Art Howard wrote:

I also ordered mine on the 18th and mine is also sitting in Cincinnati for the last day.

 It is indicated that once it hits the USA it is USPS. Was supposed to deliver this last Friday so I figure maybe Tuesday here in Minnesota.

 

uBITx For Sale

Glenn AE0Q <ae0q@...>
 

I just today received my uBITx (ordered on 19 Dec) but things have changed and I don't have time for the project.

I've collected some things I was going to use to build it, all is for sale.

uBITx  unopened except for photos   $109

Adafruit 10k Log pot (with 1/4" dia shaft) and 2 black knobs (blue stripe)  $5.00

SOTABeams CW DSP Audio Filter  $42

Beautiful aluminum enclosure (2.4" x 6.22" x 7.2" inside dimensions)  $20
See the ebay link for assembled photos of the box.
https://www.ebay.com/itm/122879292126

Photos of all attached.

Would like to sell all together but not necessary.

Glenn AE0Q

RadI2Cino boards temporarily sold out! #ubitx

Jim Sheldon
 

Ladies & Gentlemen, the response to this offering has been overwhelming.  The initial run of boards, both bare boards and the option 2 boards with the SMD semiconductors already installed from this initial offering are SOLD OUT.  More boards are on order but due to the Chinese New Year they won't be shipping until around the end of the month.

We ask that you please hold all inquiries and orders until I re-announce the availability of the next batch.  We have decided NOT to allow any pre-ordering to avoid the tremendous overhead involved in keeping track of incoming orders while trying to do other design work. 

Thank you very much for your understanding and we are very sorry for the inconvenience.  The RadI2Cino boards will again be available just not immediately.

Jim Sheldon - W0EB

Re: Blown by nearby transceiver #bitx40help

Jerry Gaffke
 

Good point, if we're worried about magnetic field coupling then tinfoil won't do much good.
I'm not sure exactly how the power to blow 1/4 Watt resistors would be communicated,
was guessing it might be straight magnetic coupling like a transformer, though could be electromagnetic.
I doubt it is straight electrostatic, not enough current with no conductor between unless the air ionizes as in a lightning bolt.
If electromagnetic (radio waves), a Faraday cage around the radio such as that tinfoil is in order,
and this is the sort of shielding usually found in commercial gear.  Such shielding might help
resolve the problem of hearing audio tones from the 16mhz Nano oscillator, or noise from
nearby computers and power supplies.

My rig is stitting out open-faced on a piece of plywood, front and back panels of scrap PC screwed to the plywood,
the main board has the standoffs installed upside down so the 4-40 threads are held in place by holes drilled into the wood.
Works fine, though I have a quiet environment.  Easy to work on, I can just pick the board up and pop the connectors off.

When posting that original tinfoil hat comment my thought was:
    "If it can do that to 1/4 Watt resistors, what can it do to my brain?"
Perhaps we will learn that there was a cabled connection, and this is all moot.

I spent about 6 hours with cell phone at my ear a couple days ago trying to sort out 
some issues with our Verizon cellphone account.   I really should have been using a headset.
I have heard occasional reports like Raj's though am not aware of a definitive study.
Am thinking a 4 Watt transmitter 1/4" from my brain for long periods is best avoided.

Jerry, KE7ER


On Mon, Feb 12, 2018 at 10:57 am, Arv Evans wrote:
While tinfoil (even the tinfoil hat) can lessen exposure to static charges, how
much effect does it have on electro-magnetic energy.  Seems that a thick steel
chassis (or hat)  might be better for limiting both ES and EM signal levels.

Re: Si5351 Programming Flowchart

Jerry Gaffke
 

Calculations within the si5351bx routines are much better than than 1ppm accurate, perhaps more like 0.01ppm.
As I recall, the math was accurate within 0.2hz when doing calculations for a high side vfo on the Bitx40 of 19mhz. 


On Mon, Feb 12, 2018 at 09:48 am, Jerry Gaffke wrote:
The accuracy of the calculations is down around 1ppm, considerably better than the stability of the 25mhz reference oscillator.

Re: wrong frequency after software change. #ubitx

Mike Woods
 

Michael

The uBITx and the BITx40 have different circuitry.  In particular the uBITx has 2 IF stages (45MHz and 12MHz) whereas the BITx40 only has one at 12 MHz.  Some changes would be required to the software before the uBITx software will work on the BITx40.  Also some rewriting would be required as different pin outs are used (particularly if the BITx40 has been modified with Allard mods.

I am working on changing over one of my BITx40s to run on uBITx.  I will report on progress to the group.

There is no difference between Raduino devices except the header confuguration.  You should use either the HF Signals BITx4o sketch or the improved sketch from Allard, at least in the short term.

Mike ZL1AXG



On Tue, 13 Feb 2018 at 6:27 AM, Michael Shreeve <shreevester@...> wrote:
Another strange twist which may be related. I changed a BITX40 rad to uBITX Raduino. Hardware change, you remove the 5 pin plug and put a header in its place. I really looked hard for any other differences in Hardware. Saw none. So, I programed with original software. Crazy, but LSB is USB on 80 and 40 (up to 10mhz) and other than that, seems stable and might be on freq. So, I tried Ians latest 1.01 and LSB is correct, USB is correct, have control also, but freq is off about 400khz. So, found an EEPROM WIPE routine, says it works for all size eproms, and did the wipe. No luck. Still off, I re-loaded the original Ashhar software stil backwards. Thinking I would need to use memory manager but not sure I have the skills. Any ideas ? 

On Mon, Feb 12, 2018 at 9:01 AM, at91r40008 <yvon@...> wrote:
Thank you Jack, the problem is that it shows all the same name because it takes the project
name uBitx20. Every project I downloaded has a new folder name but inside
Arduino it shows uBitx20.
That is why I am going to rename them each time I download one.
--
73, Yvon NU6I




--
Michael Shreeve N6GRG
15901 Cloverdale Road
Anderson, CA 96007
530-410-8678
"Don't worry about a thing, 'Cause every little thing gonna be all right!" -Bob Marley



Re: Si5351 Programming Flowchart

Pavel Milanes Costa <pavelmc@...>
 

El 12/02/18 a las 15:35, Jerry Gaffke via Groups.Io escribió:
Calculations within the si5351bx routines are much better than than 1ppm accurate, perhaps more like 0.01ppm.
As I recall, the math was accurate within 0.2hz when doing calculations for a high side vfo on the Bitx40 of 19mhz.
If the math/hardware has a better accuracy than the Xtal itself then you have at the output just the stability of the Xtal... right?

73 Pavel CO7WT

Re: wrong frequency after software change. #ubitx

Mike Woods
 

That should read ‘rewiring’ Not rewriting!


On Tue, 13 Feb 2018 at 9:54 AM, Mike Woods <mhwoods@...> wrote:
Michael

The uBITx and the BITx40 have different circuitry.  In particular the uBITx has 2 IF stages (45MHz and 12MHz) whereas the BITx40 only has one at 12 MHz.  Some changes would be required to the software before the uBITx software will work on the BITx40.  Also some rewriting would be required as different pin outs are used (particularly if the BITx40 has been modified with Allard mods.

I am working on changing over one of my BITx40s to run on uBITx.  I will report on progress to the group.

There is no difference between Raduino devices except the header confuguration.  You should use either the HF Signals BITx4o sketch or the improved sketch from Allard, at least in the short term.

Mike ZL1AXG



On Tue, 13 Feb 2018 at 6:27 AM, Michael Shreeve <shreevester@...> wrote:
Another strange twist which may be related. I changed a BITX40 rad to uBITX Raduino. Hardware change, you remove the 5 pin plug and put a header in its place. I really looked hard for any other differences in Hardware. Saw none. So, I programed with original software. Crazy, but LSB is USB on 80 and 40 (up to 10mhz) and other than that, seems stable and might be on freq. So, I tried Ians latest 1.01 and LSB is correct, USB is correct, have control also, but freq is off about 400khz. So, found an EEPROM WIPE routine, says it works for all size eproms, and did the wipe. No luck. Still off, I re-loaded the original Ashhar software stil backwards. Thinking I would need to use memory manager but not sure I have the skills. Any ideas ? 

On Mon, Feb 12, 2018 at 9:01 AM, at91r40008 <yvon@...> wrote:
Thank you Jack, the problem is that it shows all the same name because it takes the project
name uBitx20. Every project I downloaded has a new folder name but inside
Arduino it shows uBitx20.
That is why I am going to rename them each time I download one.
--
73, Yvon NU6I




--
Michael Shreeve N6GRG
15901 Cloverdale Road
Anderson, CA 96007
530-410-8678
"Don't worry about a thing, 'Cause every little thing gonna be all right!" -Bob Marley