Sourcing DIP Transformer replacements - test-drb@ccmp.vtda.org

28 May 2013

...
  Date: Mon, 27 May 2013 17:48:34 -0700
 From: Brent Hilpert <hilpert at cs.ubc.ca>
 To: "General Discussion: On-Topic and Off-Topic Posts"
 	<cctalk at classiccmp.org>
 Subject: Re: Sourcing DIP Transformer replacements
 Message-ID: <351131F8-AC04-460B-8FE0-68F6B672ED93 at cs.ubc.ca>
 Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed

 On 2013 May 27, at 2:00 PM, Dave wrote:

> On 27/05/2013 19:19, Brent Hilpert wrote:
>     
>> ..
>> The 2624- numbers appear to be Burroughs house numbers as I think  
>> the board is from a Burroughs machine, the 79xx/78xx date codes.
>> I wonder if NPI was the transformer manufacturer. I RE'd the board  
>> so I do have a schematic that shows how they are used but don't  
>> know anything about their specs beyond that.
>>        Pulse Engineering and Rhombus Industries are both, I think, still in

business.
We currently buy delay lines from Rhombus.  They have limited stock
of many items for prototyping and repairs.  Digi-Key has a wide range
of pulse transformers from about 5 manufacturers.  If the transformers
are 1:1 winding ratio, there should be a huge range of parts available,
and the exact inductance may not be very important.

Jon