28 May
2013
28 May
'13
11:31 a.m.
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