[GreenKeys] Smoke and Fire

[malcolm at avitech.com.au]

Hi Michael,

 

I assume you are in the U.S.?  If you can't find a replacement locally, let
me know.  I have an ASR33 that I am using as a parts machine.  I'll pull the
coil/magnet from that unit if need be. It might have to wait until the first
week of February though, as I will be travelling for a couple of weeks in
the meantime.

 

FYI - I also have an 8/e and an 11/10 that I use my ASR33 on.

 

Malcolm.

(Melbourne, Australia).

 

 

Message: 21

Date: Mon, 8 Jan 2018 23:18:07 +0000 (UTC)

From: Michael Zahorik <m.zahorik at sbcglobal.net>

To: "greenkeys at mailman.qth.net" <greenkeys at mailman.qth.net>

Subject: [GreenKeys] Smoke and Fire

Message-ID: <1875512487.2886753.1515453487760 at mail.yahoo.com>

Content-Type: text/plain; charset="utf-8"

 

Well...... it seems like only a few hours ago, I was talkingabout how well
my ASR33 unit was working. This evening I was reading a papertape into my
PDP8E and half way through the read, I noticed smoke and fire insidemy
ASR33. Turns out the distributor trip magnet caught fire. Looking at
thecircuit I find that it is very simple. This coil is 120 VAC, protected by
a 3amp slow blow fuse (which did not blow) and the only control that I see
is thetape tight/out or reader switch off contact. I have removed the coil
and itappears to have burnt in mid coil, I can see red wire at the top and
bottom.This coil reads open and I see no short to the core. This magnet has
a numberon it, 1800853. While the magnet is out, re energized the unit and
there are noproblems, smoke and/or fire that is. I can read 120 VAC at J4
pin 11 & 12,when the unit is in either local or line and there is paper tape
in the reader.If the tape is removed or the Local/Line switch is turned off
the 120 VAC goesaway.

  I'm betting the coil somehow shorted internally either to itself or
thecore (ground). What are my options on finding a replacement magnet?
Thanks forthe help.?Mike Zahorik (414) 254-6768

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