19 Mar
2005
19 Mar
'05
3:33 p.m.
Maybe a little OT, but..
I just laid hands on a Friden EC-130 calculator, and I'll be darned if I can figure
out how to take the top cover off of it.
The cover *seems* to come off by sliding forward, but there are a pair of pins in the rear
that keep it in place. I've tried to flex the cover enough to clear the pins, but the
resistance encountered is more than I am comfortable with.
How does this thing come off?
--
---------------------------------------------
-. William W. Layer .- -. St. Paul, MN USA .-
---------------------------------------------------
-. Cheif bottlewasher, Atma-Sphere Music Systems .-
-. http://www.atma-sphere.com .-
--------------------------------
19 Mar
19 Mar
5:44 p.m.
Congratulations on finding a wonderful calculating relic.
At each rear bottom corner, there is a screw. It is a captive screw. Use
an appropriate sized
flat-bladed screwdriver and unscrew these screws until they drop down but
don't fall out.
Once the screws have dropped down, slide the cover forward, then lift up at
the rear, and
the cover will come free.
Rick Bensene
The Old Calculator Web Museum
http://oldcalculatormuseum.com
-----Original Message-----
From: cctalk-bounces at classiccmp.org
[mailto:cctalk-bounces at classiccmp.org] On Behalf Of William Layer
Sent: Saturday, March 19, 2005 12:34 PM
To: cctalk at classiccmp.org
Subject: Friden 130 cover removal
Maybe a little OT, but..
I just laid hands on a Friden EC-130 calculator, and I'll be
darned if I can figure out how to take the top cover off of it.
The cover *seems* to come off by sliding forward, but there
are a pair of pins in the rear that keep it in place. I've
tried to flex the cover enough to clear the pins, but the
resistance encountered is more than I am comfortable with.
How does this thing come off?
--
---------------------------------------------
-. William W. Layer .- -. St. Paul, MN USA .-
---------------------------------------------------
-. Cheif bottlewasher, Atma-Sphere Music Systems .-
-. http://www.atma-sphere.com .-
--------------------------------
6:49 p.m.
On Sat, 19 Mar 2005 14:44:27 -0800
"Rick Bensene" <rickb at bensene.com> wrote:
Congratulations on finding a wonderful calculating
relic.
At each rear bottom corner, there is a screw. It is a captive screw. Use
an appropriate sized
flat-bladed screwdriver and unscrew these screws until they drop down but
don't fall out.
Once the screws have dropped down, slide the cover forward, then lift up at
the rear, and
the cover will come free.
Thanks a lot Rick, I fiddled with it for an hour..
Overall, it seems to be working fine. I brought it up slowly on my variac, over the course
of an hour. At full line voltage (120 RMS), it's drawing about 300mA - this seems good
to me. Aluminum parts of the case are a little spotty, but that should clean up.. maybe a
little Nev-r-dull? The rest cleaned up fine with a rag and some 409.
I do hear a little whine from the CRT's oscillator(s), is that anything to be
concerned about?
Lastly, the blue plastic screen is cracked in two. Any suggestions for a replacement?
Seems like generic blue plexi to me.
Thanks again!!
Bill
10:15 p.m.
Thanks a lot Rick, I fiddled with it for an hour..
You bet. You're not the only one whose been perplexed by
this mystery.
Overall, it seems to be working fine. I brought it up slowly
on my variac, over the course of an hour.
Very good idea.
At full line
voltage (120 RMS), it's drawing about 300mA - this seems good
to me.
Sounds fine.
Aluminum parts of the case are a little spotty, but
that should clean up.. maybe a little Nev-r-dull?
The Nev-R-Dull might clean it up a little. It's probably aluminum corrosion
which pits the surface a bit, and it'll probably never be as nice as the
original
surface, but the Nev-R-Dull will make it look better.
The rest
cleaned up fine with a rag and some 409.
409 is amazing for cleaning up the goo that collects on these old machines.
I've also found that unscented baby wipes also work very well for cleaing
keyboard goo.
I do hear a little whine from the CRT's oscillator(s), is
that anything to be concerned about?
I wouldn't worry about it. Probably a little acoustic noise from the
plates in the CRT.
Lastly, the blue plastic screen is cracked in two. Any
suggestions for a replacement? Seems like generic blue plexi to me.
It is, but it's a thin piece, and pretty flexible. Yours probably just
got dried out and cracked. I'd check a place like Tap Plastics or the like
to see if you can find something similar.
Thanks again!!
Sure. Always like to help out folks who rescue these great old machines.
BTW, I finally was able to pull my Friden 130 and 132 out of storage on
Friday,
and brought them over to the shop and powered them up one at a time with the
Variac
over the course of half an hour. They hadn't been run in over a year, and
were in
a nice version of one of those rental storage places (very clean, insulated,
but
not heated). I was happy to find that both machines came up just fine.
-Rick
7059
days inactive
7060
days old
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