Date   
Re: Isolate any jacks/controls from metal chassis? #ubitx

Jim
 

Used sticky back copper foil to line the plastic case on my SDRPlay. Worked well. Cleaned up some noise issues.

Jim
WA3APC

Re: Bitx40 very loud, high-pitched, low frequency noise

SP9DEV
 

Thank you so much for your help Woody! I'll try to get my hand on a small ceramic cap and let you know if this resolved the problem. I'll also try to salvage the ferrite sleeve from an old cable. I'll also try to power the bitx using 8 AA batteries as a constant DC source to check if the problem is even related to the power supply. Hopefully 8 AA batteries will allow for at least a couple of minutes of RX operation.

Antuino manual

John Norris
 

This may not be going to the right group.

Is there a manual available for the Antuino? My unit arrived today.

I thought I joined the Antuino group but I see the last posting I received was on 8/17.


John Norris
KI4UCN

Re: Antuino manual

Curt
 

Check hfsignals website, and the files section of this group.

Re: Antuino manual

Jim Sheldon
 

That would be nice.  Mine works fine on the external power input but 6 brand new AA cells in the battery box (9.56V) wont even light it up.  I did check and have the 9+ volts on the PCB terminals but without a manual and current schematic I don't want to take it apart.  Not really a happy camper right now.  Farhan take note I suspect an open  or reversed diode but without a schematic I can trust, I don't want to destroy it accidentally.

Jim, W0EB 

 

On Aug 22, 2019, at 6:43 PM, John Norris <jlnorrisjr@...> wrote:

This may not be going to the right group.

Is there a manual available for the Antuino? My unit arrived today.

I thought I joined the Antuino group but I see the last posting I received was on 8/17.


John Norris
KI4UCN

Re: Antuino manual

Jerry Gaffke
 

From my post 71040:

There's an updated schematic in this July 26 2019 post from Farhan
along with a list of changes:    https://groups.io/g/BITX20/message/70551
As he states in that post, it all got archived here:
    https://github.com/afarhan/antuinov2.1
The previous version of the Raduino is found here, last updated in May of 2019:
    https://github.com/afarhan/antuino

Here's the manual:  http://www.hfsignals.com/index.php/antuino/
If the Bitx40 and uBitx are any indication, 
there won't be a better manual coming out until you write it.

Jerry, KE7ER



On Thu, Aug 22, 2019 at 05:47 PM, Jim Sheldon wrote:
That would be nice.  Mine works fine on the external power input but 6 brand new AA cells in the battery box (9.56V) wont even light it up.  I did check and have the 9+ volts on the PCB terminals but without a manual and current schematic I don't want to take it apart.  Not really a happy camper right now.  Farhan take note I suspect an open  or reversed diode but without a schematic I can trust, I don't want to destroy it accidentally.
 
Jim, W0EB 

Re: Antuino manual

Ashhar Farhan
 

Jim,
The SMD parts are assembled on a Panasonic pick and place. No chance of a reversed diode. What is, however, possible is that the DC connector, which is hand soldered, hasnt been soldered properly. Open up the box, unscrew the PCB and flow solder on the tabs of the DC connector from the component side. I covered this problem a while ago. 
A video manual is in the works. I finished a few yesterday, I will start posting th3 videos over the weekend.

73, f


On Fri 23 Aug, 2019, 6:17 AM Jim Sheldon, <w0eb@...> wrote:
That would be nice.  Mine works fine on the external power input but 6 brand new AA cells in the battery box (9.56V) wont even light it up.  I did check and have the 9+ volts on the PCB terminals but without a manual and current schematic I don't want to take it apart.  Not really a happy camper right now.  Farhan take note I suspect an open  or reversed diode but without a schematic I can trust, I don't want to destroy it accidentally.

Jim, W0EB 

 

On Aug 22, 2019, at 6:43 PM, John Norris <jlnorrisjr@...> wrote:

This may not be going to the right group.

Is there a manual available for the Antuino? My unit arrived today.

I thought I joined the Antuino group but I see the last posting I received was on 8/17.


John Norris
KI4UCN

Re: Antuino manual

Jim Sheldon
 

OK, I'll check that.  The series 1N4148 on the battery line could also be open. I found the schematic.  Had trouble downloading from github but finally got it.  Thanks,
Jim

On Aug 22, 2019, at 9:22 PM, Ashhar Farhan <farhanbox@...> wrote:

Jim,
The SMD parts are assembled on a Panasonic pick and place. No chance of a reversed diode. What is, however, possible is that the DC connector, which is hand soldered, hasnt been soldered properly. Open up the box, unscrew the PCB and flow solder on the tabs of the DC connector from the component side. I covered this problem a while ago. 
A video manual is in the works. I finished a few yesterday, I will start posting th3 videos over the weekend.

73, f


On Fri 23 Aug, 2019, 6:17 AM Jim Sheldon, <w0eb@...> wrote:
That would be nice.  Mine works fine on the external power input but 6 brand new AA cells in the battery box (9.56V) wont even light it up.  I did check and have the 9+ volts on the PCB terminals but without a manual and current schematic I don't want to take it apart.  Not really a happy camper right now.  Farhan take note I suspect an open  or reversed diode but without a schematic I can trust, I don't want to destroy it accidentally.

Jim, W0EB 

 

On Aug 22, 2019, at 6:43 PM, John Norris <jlnorrisjr@...> wrote:

This may not be going to the right group.

Is there a manual available for the Antuino? My unit arrived today.

I thought I joined the Antuino group but I see the last posting I received was on 8/17.


John Norris
KI4UCN

Re: Audio pre-amplifier for microphone?

VK3HN
 

I bought one of these to experiment with, thinking there may be an op amp gain stage between the electret and the A pin (audio out). Unfortunately, there isn't. So unless you want a VOX, this module doesn't improve over an electret mic insert and a series resistor to the phantom DC supply. Note also that A has DC on it, there is no series capacitor. 

There is apparently a similar Arduino/breakout module, about the same size, with an on-board electret insert, that does have an op-amp gain stage, leading to an audio output.  This could replace the mic amp on a homebrew exciter.  I am not thinking of the SSM2167 modules which are another thing altogether.   If anyone knows where these are, please post a URL.

73 from Paul VK3HN.  

Re: raduino crystal question

ashok.das81@...
 

Thanks KE7ER thats helps a lot.

Re: Audio pre-amplifier for microphone?

Paul KL7FLR
 

Paul,
Might this be what your looking for?  https://www.adafruit.com/product/1713

Paul
KL7FLR

Re: Antuino manual

Daniel Walter
 

I had the same problem. Mine was a bad solder joint on the negative battery to switch area. As Farhan says, just reflow it and you should be good. 
--
Dan, NM3A

Re: Antuino manual

KD8CGH
 

John
   There is also an Antuino groups.io group.
      Bob

Re: Antuino manual

Jim Sheldon
 

Ashhar and all,
I found the problem and fixed it.  It was not completely bad soldering on the DC connector, it was also the 1N4148 diode in series with the incoming 9 volts being OPEN.  After re-flowing all the solder joints from the component side and checking continuity, I still got nothing from the 9V connectors + side to the side terminal on the main DC connector.  I checked continuity from the cathode of the diode to that point and it was good so I checked the diode -- no forward conductivity at all.  I have a well stocked parts bin, replaced the diode and now everything works as it should.  

Anyone having this problem that re-flowing solder on the DC connector doesn't fix, be sure to check the diode as well.  1N4148's are pretty rugged but I've received bad ones even from Digi-Key and Mouser in the anti-static strips they come in and it's not all that uncommon.

Jim - W0EB

Oh yes, how about a written manual in PDF format rather than video?  Some of us would much rather read the book rather that watch you-tube videos.  Especially when needing info and the internet is not available!

Jim

------ Original Message ------
From: "Ashhar Farhan" <farhanbox@...>
Sent: 8/22/2019 9:22:14 PM
Subject: Re: [BITX20] Antuino manual

Jim,
The SMD parts are assembled on a Panasonic pick and place. No chance of a reversed diode. What is, however, possible is that the DC connector, which is hand soldered, hasnt been soldered properly. Open up the box, unscrew the PCB and flow solder on the tabs of the DC connector from the component side. I covered this problem a while ago. 
A video manual is in the works. I finished a few yesterday, I will start posting th3 videos over the weekend.

73, f


On Fri 23 Aug, 2019, 6:17 AM Jim Sheldon, <w0eb@...> wrote:
That would be nice.  Mine works fine on the external power input but 6 brand new AA cells in the battery box (9.56V) wont even light it up.  I did check and have the 9+ volts on the PCB terminals but without a manual and current schematic I don't want to take it apart.  Not really a happy camper right now.  Farhan take note I suspect an open  or reversed diode but without a schematic I can trust, I don't want to destroy it accidentally.

Jim, W0EB 

 

On Aug 22, 2019, at 6:43 PM, John Norris <jlnorrisjr@...> wrote:

This may not be going to the right group.

Is there a manual available for the Antuino? My unit arrived today.

I thought I joined the Antuino group but I see the last posting I received was on 8/17.


John Norris
KI4UCN

Re: Antuino manual

Edward Reynolds
 

Is there a link to it?
Thanks for you time
Ed N7SNT 


On Aug 23, 2019, at 6:42 AM, Jim Sheldon <w0eb@...> wrote:

Ashhar and all,
I found the problem and fixed it.  It was not completely bad soldering on the DC connector, it was also the 1N4148 diode in series with the incoming 9 volts being OPEN.  After re-flowing all the solder joints from the component side and checking continuity, I still got nothing from the 9V connectors + side to the side terminal on the main DC connector.  I checked continuity from the cathode of the diode to that point and it was good so I checked the diode -- no forward conductivity at all.  I have a well stocked parts bin, replaced the diode and now everything works as it should.  

Anyone having this problem that re-flowing solder on the DC connector doesn't fix, be sure to check the diode as well.  1N4148's are pretty rugged but I've received bad ones even from Digi-Key and Mouser in the anti-static strips they come in and it's not all that uncommon.

Jim - W0EB

Oh yes, how about a written manual in PDF format rather than video?  Some of us would much rather read the book rather that watch you-tube videos.  Especially when needing info and the internet is not available!

Jim

------ Original Message ------
From: "Ashhar Farhan" <farhanbox@...>
Sent: 8/22/2019 9:22:14 PM
Subject: Re: [BITX20] Antuino manual

Jim,
The SMD parts are assembled on a Panasonic pick and place. No chance of a reversed diode. What is, however, possible is that the DC connector, which is hand soldered, hasnt been soldered properly. Open up the box, unscrew the PCB and flow solder on the tabs of the DC connector from the component side. I covered this problem a while ago. 
A video manual is in the works. I finished a few yesterday, I will start posting th3 videos over the weekend.

73, f


On Fri 23 Aug, 2019, 6:17 AM Jim Sheldon, <w0eb@...> wrote:
That would be nice.  Mine works fine on the external power input but 6 brand new AA cells in the battery box (9.56V) wont even light it up.  I did check and have the 9+ volts on the PCB terminals but without a manual and current schematic I don't want to take it apart.  Not really a happy camper right now.  Farhan take note I suspect an open  or reversed diode but without a schematic I can trust, I don't want to destroy it accidentally.

Jim, W0EB 

 

On Aug 22, 2019, at 6:43 PM, John Norris <jlnorrisjr@...> wrote:

This may not be going to the right group.

Is there a manual available for the Antuino? My unit arrived today.

I thought I joined the Antuino group but I see the last posting I received was on 8/17.


John Norris
KI4UCN

Kit box paint removal

bill wright
 



All
I remember a thread regarding paint removal on a Kit box chassis.
What is the prevailing approach to remove paint to achieve continuity
between MB and daughter to Kit chassis? I tried brush/grinder/paint remover

Appreciate any comments. 
73 Bill de kd5yyk

uBITX v2 (Early 2018) for sale - w amateurradiokits.in case and xtras

joseph.b.baird@...
 

Unassembled uBITX delivered May 2018 for sale,  Has been opened and components inventoried, but NOT assembled.  Board silk screened with a manufacturing date of 02 2018 and marked 'ubitx v3 (c) hfsig.com.2017  wirh a handwritten (sn?) of n968/3'.  Radurino has handwritten number of '909/3'.  Also including 3d printed enclosure for mike and W0EB BITx CW Conditioning Adapter (PCB only) .  Case is blue. $129 for all includes shipping to the CONUS.  photos avaialble.  buyer pays international shipping.  joseph.b.baird@... - KN4IFV

Re: WSPR and APRS mobile

Don - KM4UDX
 

Ted -- look at km4udx in any of the wspr-related web sites.

All the multi-band results are uBITX and raspberry (clone) driven.

Yes, my full sized antenna is  not a good parallel to a wip antenna.  But, the results are remarkable (says me) on their own.

Don
Km4udx

Re: Kit box paint removal

Curt
 

No exact answers here. I suggest using a large drill bit, by hand, to remove paint at RF connector.

Curt

Re: Kit box paint removal

Ian Reeve
 

I use a countersink drill bit and carefully remove a thin circular strip of paint and use star washers for all fixings.These washers provide a excellent connection to ground wherever needed..


From: BITX20@groups.io <BITX20@groups.io> on behalf of Curt via Groups.Io <wb8yyy@...>
Sent: Friday, August 23, 2019 6:47:46 PM
To: BITX20@groups.io <BITX20@groups.io>
Subject: Re: [BITX20] Kit box paint removal
 
No exact answers here. I suggest using a large drill bit, by hand, to remove paint at RF connector.

Curt