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Etx-70 - Power Supply unit / PP3 cable connector?

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#1 Peter_D

Peter_D

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Posted 26 November 2019 - 06:07 AM

Hi,

 

I got a used Etx-70 recently and I'm trying to source the parts to get it connected to the mains power supply here in Germany.

 

I've located this later Etx-80 PP3 cable that is compatible:

 

https://www.telescop...able-etx80.html

 

I have also located this mains power supply unit (just need a plug adapter for it):

 

http://www.opticstar...=0_10_5_1_6_320

 

My question is how do I connect the two male connectors from the above two cables together? 

I would really appreciate any guidance, thanks!

 

Clear skies,

 

Peter


Edited by Peter_D, 26 November 2019 - 06:08 AM.


#2 skytele

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Posted 26 November 2019 - 06:25 AM

looks like you need to connect two female plugs

take a look at 

US eBay item number: 173907255235

 DC-2-1-x-5-5mm-Male-to-Female-Converter-Power-Adapter-Female-to-Female-CCTV-LED


Edited by skytele, 26 November 2019 - 06:27 AM.

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#3 sg6

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Posted 26 November 2019 - 06:53 AM

Any good with a soldering iron?

I made my own up;

 

Female 2.1 connector, PP3 wired connector - they come wired black+red.

Connection:

Outer of Female to the Big PP3 socket.

Center pin of Female to the Small PP3 socket.

Need a meter to verify.

 

Output from DC HAS to be Center Positive.

 

If you think too much about the actual wires you get it wrong as they have to have a swap over in the wire colors. Trust me.

The ETX70's work better at 12v. Buy an DC adaptor that has  selectable voltages. And a German plug therefore.

 

The above means less cost and no cable/convertion for the 2 male ends.


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#4 Peter_D

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Posted 26 November 2019 - 07:19 AM

Many thanks for the prompt responses! I have to say that soldering is a little outside my comfort zone but I appreciate the answer - actually maybe something to aspire to take up for next year, basic circuitry and electronics.

Edited by Peter_D, 26 November 2019 - 07:20 AM.


#5 NearVision

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Posted 26 November 2019 - 09:07 AM

I put together an adapter for my ETX70 with parts like these from Amazon.

https://www.amazon.c...4776587&sr=8-20

https://www.amazon.c...4776476&sr=8-11

 

The links here aren't exactly the same as what I used and they are for the US but you can find similar connectors in Germany. It was several years ago and they aren't listed anymore. But I took a 9v connector with wires (PP3) and used a female 2.1mm jack with screw terminals. This way I could be sure of getting the polarity correct. The PP3 connector ends up wired backwards when you connect 2 together and you need to reverse the wires in the 2.1mm jack. If it's a bit hard to wrap your head around draw it out with the connector plus & minus on the scope to the power supply plus & minus.

 

And, +1 for sg6's comments about polarity and 12VDC instead of 9VDC.


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