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Have SMA kit. Possible to add/solder additional SO239 jack to the ¡®out/ant¡¯. #atu-100

 
Edited

Can I just solder an additional SO239 connector to the pcb where the existing sma jack is? This is on the ¡®out/ant¡¯ side. ?I would like to be able to choose between sma and SO239 output jacks to antenna. ?Obviously not use both jacks at the same time, just one or the other. Would it be bad to solder up the additional jack? Would it damage the circuit or degrade performance etc?

To clarify, the PCB will have the standard SMA connector soldered directly to it. ?I was wondering if I can additionally solder the center pin via a wire of a so239 jack to the same pad, or the connected pad behind it. The added so239 would be mounted to the external case similar to how they are mounted in normal kits. Thx
 

Yes that would be fine
If there is a miss match it will just tune it,
I just removed my sma sockets as I am going to put BNC sockets,
Dave

On Mon, 12 Dec 2022, 20:09 , <lagunacomputer@...> wrote:

[Edited Message Follows]

Can I just solder an additional SO239 connector to the pcb where the existing sma jack is? This is on the ¡®out/ant¡¯ side.? I would like to be able to choose between sma and SO239 output jacks to antenna.? Obviously not use both jacks at the same time, just one or the other. Would it be bad to solder up the additional jack? Would it damage the circuit or degrade performance etc?

To clarify, the PCB will have the standard SMA connector soldered directly to it.? I was wondering if I can additionally solder the center pin via a wire of a so239 jack to the same pad, or the connected pad behind it. The added so239 would be mounted to the external case similar to how they are mounted in normal kits. Thx

 

Thank you Dave!

I didn¡¯t think it would matter, however I didn¡¯t want to mess up the circuit design or performance. ?2 connectors will also avoid using adapters for converting sma to so239. ?I am QRP with trusdx at 5 watts.
 

Hi?
Have you done the low power tune mode
Software change so it will tune at lower power and remove 5 windings on both sides of the transformer,
Dave

On Mon, 12 Dec 2022, 20:22 , <lagunacomputer@...> wrote:
Thank you Dave!

I didn¡¯t think it would matter, however I didn¡¯t want to mess up the circuit design or performance. ?2 connectors will also avoid using adapters for converting sma to so239.? I am QRP with trusdx at 5 watts.

 

I have the 1:5 windings on the transformer, but am still waiting for a pickit programmer to come in the mail.
 

Ok great,
Thanks Dave?

On Mon, 12 Dec 2022, 21:00 , <lagunacomputer@...> wrote:
I have the 1:5 windings on the transformer, but am still waiting for a pickit programmer to come in the mail.

 

Was hoping to confirm both of these vias/pads are the same?? Both are the ANT out center pin?? I want to solder the additional SO239 pin to the empty via that is not in use by the SMA adapter....? ? thanks
 

Yes

On Thu, 15 Dec 2022, 21:21 , <lagunacomputer@...> wrote:
Was hoping to confirm both of these vias/pads are the same?? Both are the ANT out center pin?? I want to solder the additional SO239 pin to the empty via that is not in use by the SMA adapter....? ? thanks

atu100_ant.png

Michael Davis
 

Not sure if the goal is a change in the physical connections from sma to either bnc or pl259. If so, why not an adapter. Are they too lossy?
 
Edited

Goal is to:
-have SMA and also SO239 connector to choose from for the antenna side
-avoid adapters
-use the extra so239 connector that came with my kit?
-use a standard so239 cable to my so239 9:1 unun
-reduce costs buying more cables/adapters
-have ready to go option between SMA and SO239 in the field and for later antennas, standardized small kit
-initially for QRP, so yes avoid any loss using adapters.

?
Thanks!
?

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