Date   
Re: Second batch of uBITX shipping? #ubitx

Art Howard
 

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: Blown by nearby transceiver #bitx40help

edufortes@...
 

Thanks to everyone for your help, I'll be checking those and trying to replace the burned components.

 Jerry Gaffke
 (KE7ER),

yes, we were testing 40m on a ICom IC-725. 

I've found another two burned :/    R131 & R132




Re: Blown by nearby transceiver #bitx40help

Jerry Gaffke
 

Those with plastic cases for their Bitx40/uBitx and with nearby high power gear
might line the inside of that case with tinfoil.  Fashion a hat with any leftover scraps.
Jerry, KE7ER


On Sun, Feb 11, 2018 at 09:17 pm, Jerry Gaffke wrote:
I am still quite surprised that enough energy got coupled in to blow the trace. 
The traces do form a moderately large loop, a single turn inductor, perhaps that was all it took.
Or perhaps those toroids are not as self shielding as I had figured.

Re: Blown by nearby transceiver #bitx40help

Jack Purdum
 

Fashion a hat with any leftover scraps.
Uncalled for...

Jack, W8TEE


From: Jerry Gaffke via Groups.Io <jgaffke@...>
To: BITX20@groups.io
Sent: Monday, February 12, 2018 10:22 AM
Subject: Re: [BITX20] Blown by nearby transceiver #bitx40help

Those with plastic cases for their Bitx40/uBitx and with nearby high power gear
might line the inside of that case with tinfoil.  Fashion a hat with any leftover scraps.
Jerry, KE7ER


On Sun, Feb 11, 2018 at 09:17 pm, Jerry Gaffke wrote:
I am still quite surprised that enough energy got coupled in to blow the trace. 
The traces do form a moderately large loop, a single turn inductor, perhaps that was all it took.
Or perhaps those toroids are not as self shielding as I had figured.


Re: Blown by nearby transceiver #bitx40help

Gordon Gibby
 

Hi Jack, I hope your response was in jest!

I once gave a four session training package on financial planning to the docs at my institution and I told them the last session would be way off the beaten path, and I actually made a tin hat to wear to start off that session. As usual, my predictions turned out to be mostly completely wrong so far.  Luckily, I never completely believe even myself.


On Feb 12, 2018, at 10:24, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

Fashion a hat with any leftover scraps.
Uncalled for...

Jack, W8TEE


From: Jerry Gaffke via Groups.Io <jgaffke@...>
To: BITX20@groups.io
Sent: Monday, February 12, 2018 10:22 AM
Subject: Re: [BITX20] Blown by nearby transceiver #bitx40help

Those with plastic cases for their Bitx40/uBitx and with nearby high power gear
might line the inside of that case with tinfoil.  Fashion a hat with any leftover scraps.
Jerry, KE7ER


On Sun, Feb 11, 2018 at 09:17 pm, Jerry Gaffke wrote:
I am still quite surprised that enough energy got coupled in to blow the trace. 
The traces do form a moderately large loop, a single turn inductor, perhaps that was all it took.
Or perhaps those toroids are not as self shielding as I had figured.


Re: Blown by nearby transceiver #bitx40help

Jerry Gaffke
 

Very curious. 
Blowing R131 and R132 might be due to a very large signal showing up at Q13,
though I would expect Q13 to blow first.

In your first post it says:
    > A quick flash, smoke, and the bitx40 that was only on, no antenna connected, died. 
I would think the Bitx40 would have to be in transmit to supply +12v via the TX rail
for R131,R132 to fry.  Perhaps the RF field also managed to turn on PTT somehow?

I find this to be very weird and still unexplained, we appreciate all the photos.
Another photo showing the tuner involved and the physical placement of transceiver, tuner, and Bitx40
would be appreciated.  Also any further information about what was going on when this occurred.

Jerry, KE7ER




On Mon, Feb 12, 2018 at 07:18 am, <edufortes@...> wrote:

I've found another two burned :/    R131 & R132

Re: Blown by nearby transceiver #bitx40help

Jerry Gaffke
 

When bored with all the cat videos, take a look at this:
    https://www.youtube.com/watch?v=urglg3WimHA
Weird Al rules!

Jerry, KE7ER


On Mon, Feb 12, 2018 at 07:27 am, Gordon Gibby wrote:
Hi Jack, I hope your response was in jest!
 

Re: Blown by nearby transceiver #bitx40help

chris gress <Chrisg0wfh@...>
 

My guess is he made a mistake and the 725 was wired to the bitx via coax and atu the poor bitx got a big dose of rf it can be fixed 

On 12 Feb 2018 15:37, "Jerry Gaffke via Groups.Io" <jgaffke=yahoo.com@groups.io> wrote:

Very curious. 
Blowing R131 and R132 might be due to a very large signal showing up at Q13,
though I would expect Q13 to blow first.

In your first post it says:
    > A quick flash, smoke, and the bitx40 that was only on, no antenna connected, died. 
I would think the Bitx40 would have to be in transmit to supply +12v via the TX rail
for R131,R132 to fry.  Perhaps the RF field also managed to turn on PTT somehow?

I find this to be very weird and still unexplained, we appreciate all the photos.
Another photo showing the tuner involved and the physical placement of transceiver, tuner, and Bitx40
would be appreciated.  Also any further information about what was going on when this occurred.

Jerry, KE7ER




On Mon, Feb 12, 2018 at 07:18 am, <edufortes@...> wrote:

I've found another two burned :/    R131 & R132

Re: Blown by nearby transceiver #bitx40help

Lawrence Galea
 

Looks like C131 has also flashed. There is a dark area as if has burned.

On Mon, Feb 12, 2018 at 4:18 PM, <edufortes@...> wrote:
Thanks to everyone for your help, I'll be checking those and trying to replace the burned components.

 Jerry Gaffke
 (KE7ER),

yes, we were testing 40m on a ICom IC-725. 

I've found another two burned :/    R131 & R132





Re: Lost audio from receiver

Dennis Yancey <bigbluedry@...>
 

Put a socket in. That way you only need to fix the board once.. lm386 chips are cheap.

Re: Blown by nearby transceiver #bitx40help

pat griffin
 

I think I am with Chris on this.  Early on, I fired up an Icom 735 a couple of feet away from the Bitx40 and it did indeed take out Q13 but left nary a mark.

Pat AA4PG



http://www.cahabatechnology.com/aa4pg.html


From: BITX20@groups.io <BITX20@groups.io> on behalf of chris gress <Chrisg0wfh@...>
Sent: Monday, February 12, 2018 9:42:38 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Blown by nearby transceiver #bitx40help
 
My guess is he made a mistake and the 725 was wired to the bitx via coax and atu the poor bitx got a big dose of rf it can be fixed 

On 12 Feb 2018 15:37, "Jerry Gaffke via Groups.Io" <jgaffke=yahoo.com@groups.io> wrote:

Very curious. 
Blowing R131 and R132 might be due to a very large signal showing up at Q13,
though I would expect Q13 to blow first.

In your first post it says:
    > A quick flash, smoke, and the bitx40 that was only on, no antenna connected, died. 
I would think the Bitx40 would have to be in transmit to supply +12v via the TX rail
for R131,R132 to fry.  Perhaps the RF field also managed to turn on PTT somehow?

I find this to be very weird and still unexplained, we appreciate all the photos.
Another photo showing the tuner involved and the physical placement of transceiver, tuner, and Bitx40
would be appreciated.  Also any further information about what was going on when this occurred.

Jerry, KE7ER




On Mon, Feb 12, 2018 at 07:18 am, <edufortes@...> wrote:

I've found another two burned :/    R131 & R132

Re: Blown by nearby transceiver #bitx40help

Jerry Gaffke
 

He did say "no antenna connected"
though that is not quite the same as saying "nothing connected to the Bitx40 antenna port".
Perhaps he still had coax from Bitx40 into the tuner.
Then a fault in the tuner or perhaps a switch in the wrong position could have brought on this sort of damage.
That would be considerably less mysterious.

However, if there was no connection to the Bitx40 antenna port, this could still be due to strong near-fields somehow.
The fact that Pat only managed to take out Q13 is no reason to think that things could not get worse with 
different a physical placement and perhaps a poor match through the tuner from his Icom. 

Jerry, KE7ER


On Mon, Feb 12, 2018 at 08:23 am, pat griffin wrote:

I think I am with Chris on this.  Early on, I fired up an Icom 735 a couple of feet away from the Bitx40 and it did indeed take out Q13 but left nary a mark.

 

My Bitx40 90% done

Mark W
 

Here are some pics of my Bitx40. I used a Harbor Freight ammo can. I will be putting a small battery inside. I havent decided on what I'll use for a mic. This one works fine, but only temporary.
Mark
K3MRK

Re: wrong frequency after software change. #ubitx

at91r40008
 

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

Re: Blown by nearby transceiver #bitx40help

 

Doc,

My xyl vu2pin would spend 4-6 hours yakking with her sisters on a mobile because its very cheap here and currently free is you buy a data packl! Guess what she got a lesion on her auditory nerve and she is now deaf in that ear!

Then she was diagnosed on the same ear's lymph node was cancerous and removed. In remission and I would not mock a tin hat! :-))
The Oz seems to be having some laws in place on this..

Now she is on speaker phone!

Raj


At 12-02-2018, you wrote:
Fashion a hat with any leftover scraps.
Uncalled for...

Jack, W8TEE

Re: Second batch of uBITX shipping? #ubitx

at91r40008
 

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

Si5351 Programming Flowchart

 

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/

It is a Josué Marin email address
marinjosue75atgmaildotcom 
Qrv's
73's Jc

Re: Blown by nearby transceiver #bitx40help

Jack Purdum
 

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


On Mon, Feb 12, 2018 at 07:27 am, Gordon Gibby wrote:


Hi Jack, I hope your response was in jest!




From: Jack Purdum <jjpurdum@...>
To: "BITX20@groups.io" <BITX20@groups.io>
Sent: Monday, February 12, 2018 10:24 AM
Subject: Re: [BITX20] Blown by nearby transceiver #bitx40help

Fashion a hat with any leftover [aluminum foil] scraps.


Uncalled for...

Jack, W8TEE

Re: wrong frequency after software change. #ubitx

Michael Shreeve
 

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: Aluminum enclosure

Paul Smith
 

A clever approach suggested by VU3PSZ. Read the piece here on reducing the Raduino height.
http://vu3psz.blogspot.ca/2018/02/ubitx-home-brewed-enclosure.html

Paul ZS2OE