Macintosh Portable

[Stephen Pereira]

I am not certain exactly what you mean by polarity in this case, but I’m guessing that you are asking which contact is positive and which is negative.
If that’s the case, the center socket is positive, and the outer jacket band is negative.

I hope this helps.

smp
--
Stephen M. Pereira
Bedford, NH  03110
KB1SXE


> On Nov 27, 2016, at 1:00 PM, cctech-request at classiccmp.org wrote:
> 
> ------------------------------
> 
> Message: 6
> Date: Sat, 26 Nov 2016 16:26:43 +1000
> From: Chris Pye <pye at mactec.com.au <mailto:pye at mactec.com.au>>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> 	<cctalk at classiccmp.org <mailto:cctalk at classiccmp.org>>
> Subject: Macintosh Portable
> Message-ID: <00D543B1-7E32-40DE-8829-91E3EBFCBF4A at mactec.com.au <mailto:00D543B1-7E32-40DE-8829-91E3EBFCBF4A at mactec.com.au>>
> Content-Type: text/plain; charset=utf-8
> 
> Does anyone know off hand what polarity that Mac Portable requires? I know that the original was 7.5V @ 1.5A, but not sure of the polarity.
> 
> I did have have a PB100 power supply that I used with mine, but (unfortunately) no longer have it.
> 
> Also (if it still works) what is the easiest way to image the old Conner SCSI drive? It doesn?t appear to have a standard connector.
> 
> I have googled this, but didn?t come up with anything useful.
> 
> 
> Thanks,
> Chris...
> 
> 
>