Date   
Re: Tuning clicks

listen@...
 

Hi!

Just in case anybody reads this old thread...

I put capacitors everywhere, and I mean EVERYWHERE! 470 µF with 100nF decoupeling everything. As well as a choke between incoming DC and outgoing. Did not get anywhere whith that. For some reason clicks where louder on USB compared to LSB. As a last resort I shielded the already short leads to the volume pot and, bliss, all clicks went away.

You learn something new every day!

Cheers!

SM6ZDM

Re: Drill hole in uBITX PCB... safe?

MVS Sarma
 

Nothing wrong. But you very well use double side ticker and manage, i suppose.  All the best Rob. 

Sarma vu3zmv

On Sat, 4 Apr 2020, 9:14 am Rob French (KC4UPR), <kc4upr@...> wrote:
I'm looking to mount a 4x6 piece of copper clad board above the back half of my uBITX on standoffs, to provide a mounting surface for some additional circuits.  However, there are only two existing mounting points for standoffs (i.e. the two rear holes in the uBITX board).  So what I'm proposing is to drill a third hole in a position that would provide for some additional support for the additional PCB.  

The uBITX PCB is just two layers, right, top and bottom?  So if I drill in a place where there is ground plane on both sides (double and triple check first) I should be good... or is there something I'm missing?

I'm looking at drilling in the location I've circled in the attached photo.  It's in the ground plane right between where I've got the BCI filter and the AGC board installed.

Thoughts?  Again, this is to install a purely mechanical standoff.  An alternative (less invasive) is to use a plastic standoff, and just anchor it to the uBITX board with some hot glue (but it would still be screwed into the upper board.

Thanks!
Rob KC4UPR

Drill hole in uBITX PCB... safe?

Rob French (KC4UPR)
 

I'm looking to mount a 4x6 piece of copper clad board above the back half of my uBITX on standoffs, to provide a mounting surface for some additional circuits.  However, there are only two existing mounting points for standoffs (i.e. the two rear holes in the uBITX board).  So what I'm proposing is to drill a third hole in a position that would provide for some additional support for the additional PCB.  

The uBITX PCB is just two layers, right, top and bottom?  So if I drill in a place where there is ground plane on both sides (double and triple check first) I should be good... or is there something I'm missing?

I'm looking at drilling in the location I've circled in the attached photo.  It's in the ground plane right between where I've got the BCI filter and the AGC board installed.

Thoughts?  Again, this is to install a purely mechanical standoff.  An alternative (less invasive) is to use a plastic standoff, and just anchor it to the uBITX board with some hot glue (but it would still be screwed into the upper board.

Thanks!
Rob KC4UPR

Re: Bits v3

Curt
 

Bill

It is a bit of a snipe hunt to figure out the wiring, but resources and people are available.

The ubitx itself v3 comes without an enclosure, but did your recent purchase include an enclosure?  if not, many options.

There are videos explaining assembly into a commonly use case from amateurradio kits india.

Let us know what you need in terms of putting it together. All these folk are frequent readers of the list. Help is literally worldwide.

Curt wb8yyy

Re: Bits v3

Bill Cromwell
 

Hi Bill,

It lookslike got directions to the assmbly instructions. You expressed douts about being able to build it. It is so simple that even *I* could do (I have a V3). You should be okay.

73,

Bill KU8H

On 4/3/20 5:36 PM, Bill wrote:
I am looking for a build manUal for a v3 radio I
looked on line and did not find anything.
also does anybody build these I might be unable to build
Bill
WF9M
--
bark less - wag more

Re: Bits v3

Viktors Miske
 

Also, some info here may help (scroll down for the files).


On Fri, Apr 3, 2020 at 7:46 PM Viktors Miske via groups.io <unclevic7=gmail.com@groups.io> wrote:
This is all I could find in my files.

On Fri, Apr 3, 2020 at 7:30 PM kc0wox Leeper <kc0wox@...> wrote:
See if this is what you want.
http://golddredgervideo.com/kc0wox/bitxver3/bitx20version3.htm
Leonard

Re: Bits v3

 

Are you working on a uBix v3?  If so, here you go (the page is applicable to basic assembly of versions 3 through 5):

https://groups.io/g/BITX20/wiki/uBITX-Assembly

73,


Mark

Re: Bits v3

Viktors Miske
 

This is all I could find in my files.

On Fri, Apr 3, 2020 at 7:30 PM kc0wox Leeper <kc0wox@...> wrote:
See if this is what you want.
http://golddredgervideo.com/kc0wox/bitxver3/bitx20version3.htm
Leonard

Re: Bits v3

kc0wox Leeper
 

Re: Bits v3

Aaron Scott
 

Here is what I’m using to build a homebrew version, I don’t know if it helps.

 

BITX - An easy to build 6 watts SSB transceiver for 14MHz

 

Sent from Mail for Windows 10

 

From: Bill
Sent: Friday, April 3, 2020 4:36 PM
To: BITX20@groups.io
Subject: [BITX20] Bits v3

 

I am looking for a build manUal for a v3 radio I 
looked on line and did not find anything.
also does anybody build these I might be unable to build
Bill
WF9M

 

Bits v3

Bill
 

I am looking for a build manUal for a v3 radio I 
looked on line and did not find anything.
also does anybody build these I might be unable to build
Bill
WF9M

Re: Hamstick Mag Mount

Ken Hansen
 

Chris,

MFJ offers a hamstick dipole kit that includes the bracket and 2 hamsticks for a given band, it's about $60-70 and available from most amateur radio suppliers.

A good deal if you need everything - just add coax and go!

I'd suggest starting with 20 or 40 meters, those are the best bands right now - but understand, hamsticks are really only useful on their resonant band.

Ken, N2VIP

On Apr 3, 2020, at 13:49, Christopher Miller <djmalak2k6@...> wrote:


This is why I want to mount whatever I setup inside my apartment. Obviously this isn’t ideal but I won’t cook us with 5 or 10 watts.

Anything that looks like it has value is stolen. I might do the hamstick dipole. I’m also looking at a 2 meter 440 ht to run.

Chris 

Re: Nominal power supply voltage

Christopher Miller
 

So,

Give it a shot but the audio ic may blow. Hrm... 

Chris 

Re: Nominal power supply voltage

Bob Fischer, Fischer Technical Services
 


For general information of the group:    
The electrical datasheet for my 2011 Chevy Silverado shows 5 Battery Charging Modes of Operation.  Generator Output Voltages range from 13.9 Volts to 15.6 Volts.  
The instrument panel is commanded to display a WARNING if it detects a voltage greater than 16 Volts.
GM Document ID 2614222

Bob
WB8BEL


From: "Robert D. Bowers" <n4fbz@...>
To: BITX20@groups.io
Sent: Friday, April 3, 2020 10:20:45 AM
Subject: Re: [BITX20] Nominal power supply voltage

The max voltage for a TDA2822 is 15 volts, according to the datasheet.  A car battery charging voltage is between 13.4 and 13.8 volts, usually 13.8.  A fully charged battery will be higher than 12 volts (if I remember right, ~13.4).  Look it up and look at the max ratings (which appear to have a bit of a safety factor built in), as well as the Quescent Current graph. 

If it was that sensitive to voltage over 12, it would not be usable in a mobile setting.  13.8 should be fine.

Bob
N4FBZ


On 4/3/20 3:37 AM, MVS Sarma wrote:
Sorry. I sm withdrawing my statement.  V3, the TDA2822 WILL LIKELY GET DAMAGED AT HIGHER VOLTAGE. 
LIMIT TO 12. 

After all you can reduce 13.8 to 12 by some pot on the psu. 

On Fri, 3 Apr 2020, 1:05 pm Mvs Sarma, <mvssarma@...> wrote:
You can use  q3.8. Pl dont again say + /-
All the best. 

On Fri, 3 Apr 2020, 12:56 pm Christopher Miller, <djmalak2k6@...> wrote:
Hello,

I am currently feeding 12 volts in to my v3 uBitx. I was wondering if I should be using 13.8 volts. Will that blow up the 5 volt regulator?

Thanks,
Chris KF4FTR


Re: Hamstick Mag Mount

Christopher Miller
 

This is why I want to mount whatever I setup inside my apartment. Obviously this isn’t ideal but I won’t cook us with 5 or 10 watts.

Anything that looks like it has value is stolen. I might do the hamstick dipole. I’m also looking at a 2 meter 440 ht to run.

Chris 

Re: Hamstick Mag Mount

Arv Evans
 

Hang your hamstick upside-down from the railing.  That way you might not need the mag-mount


On Fri, Apr 3, 2020, 11:29 AM Vic WA4THR via groups.io <vhklein=ptd.net@groups.io> wrote:
Good pictures, thanks. Here's an idea...run the coax across the ceiling, using a wire tie at the end tied to the cable TV line, and from there to the column. Strap an angle bracket to the outside of the column using either wire ties or, better, a large pipe clamp, like pictured. Atatch a hamstick to the top of the L-angle bracket and droop a wire of hopefully 1/4 wave underbeath. You can bend the angle bracket so the hamstick is at a 45 degree angle if needed.

=Vic=

Re: Hamstick Mag Mount

David
 

How about ditching the ham stick and running a wire dipole, spiral, folded,
etc. taped into a large window? Don't forget an RF choke. Just a thought.

Re: #v6 need a 12v connectiion #v6

Ion Petroianu, VA3NOI
 

Most Dlink router wall warts are capable as they are 12V/2.5A

--
Ion

VA3NOI

Re: ubitx 4 - want a fresh start, need guidance #v4 #arduino #raduino #ubitx #ubitx-help

flatpickn@...
 

Thanks Curt, I wondered if that was it's purpose. I don't have 3D printing capability, but I do have some 1/4" thick acrylic; a bandsaw; and a drill press. Could you post a picture? Maybe in a new topic. That looks like a handy add on that I have never seen mentioned before.

Thanks.

Tom
w9kkq

Re: Hamstick Mag Mount

Vic WA4THR
 

Good pictures, thanks. Here's an idea...run the coax across the ceiling, using a wire tie at the end tied to the cable TV line, and from there to the column. Strap an angle bracket to the outside of the column using either wire ties or, better, a large pipe clamp, like pictured. Atatch a hamstick to the top of the L-angle bracket and droop a wire of hopefully 1/4 wave underbeath. You can bend the angle bracket so the hamstick is at a 45 degree angle if needed.

=Vic=