This was a very interesting post Henry, I have one of these and it seems to
be working OK. I have everything except the cal cell is dead. I would like
to see a pic of those jam nuts that you shouldn't touch if possible as I
thought about cleaning the card reader.
"Henry Kolesnik" wrote in message
...
In this case the "assembler" needed flogging!

hank wd5jfr
"Jeffrey D Angus" wrote in message
...


Henry Kolesnik wrote:

It's fixed, a new day respite helps.

Which just undescores what I've been telling my techs all
along. VERIFY everything before you start flogging the
assembly.

Jeff

--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety." Benjamin Franklin
"A life lived in fear is a life half lived."
Tara Morice as Fran, from the movie "Strictly Ballroom"

Hi,
The calibration cell simply verifies that the meter is 100
microamps and a total of 250 ohms. And it contains the limit resistors
for the leakage test. I wouldn't worry about it.

Incidentally I wouldn't use any silicone lubricants on the
card-reader pins. While the original organic grease has stiffened with
time and needed to be replaced, it was probably carefully selected to
do its job. On the Cardmatics I've repaired, I've used a grease
originally supplied to General Radio by Oak, but I have no idea where
to get more of it. It was described to me by the GR engineer who gave
me some, as "Beacon M325" grease.

73, Alan

Hi,
The calibration cell simply verifies that the meter is 100
microamps and a total of 250 ohms. And it contains the limit resistors
for the leakage test. I wouldn't worry about it.

Incidentally I wouldn't use any silicone lubricants on the
card-reader pins. While the original organic grease has stiffened with
time and needed to be replaced, it was probably carefully selected to
do its job. On the Cardmatics I've repaired, I've used a grease
originally supplied to General Radio by Oak, but I have no idea where
to get more of it. It was described to me by the GR engineer who gave
me some, as "Beacon M325" grease.

73, Alan

Lou
Under the black cover over the matrix swtich there are 3 black bakelite
slabs (3.5" X 4.5" X ~1/4") with 187 holes sandwiching 185 pins. With the
black cover removed (2 screws) and the card plunger pushed in and you'll
see that the sandwich "floats" on four 8-32 threaded posts. Each of these
posts has 2 nuts sandwiching the slab sandwich. The position of the lower
4 nuts (I called these jam nuts) determines how far in the 185 pins go into
their female counterpart where there is no hole in the card. If there's a
hole in the card the pins must not make contact with their female
counterpart, and this clearance is about the thickness of a dime. In
addtion all these jam nuts must be on the same plane so that the sandwich
is orthagonal and will not bind so it can move smoothly.
A pix would have been easier but the batteries are being charged. Let me
know if you still need a pix.
73
hank wd5jfr

"Lou deGonzague" wrote in message
...
This was a very interesting post Henry, I have one of these and it seems
to
be working OK. I have everything except the cal cell is dead. I would like
to see a pic of those jam nuts that you shouldn't touch if possible as I
thought about cleaning the card reader.
"Henry Kolesnik" wrote in message
...
In this case the "assembler" needed flogging!

hank wd5jfr
"Jeffrey D Angus" wrote in message
...


Henry Kolesnik wrote:

It's fixed, a new day respite helps.

Which just undescores what I've been telling my techs all
along. VERIFY everything before you start flogging the
assembly.

Jeff

--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety." Benjamin Franklin
"A life lived in fear is a life half lived."
Tara Morice as Fran, from the movie "Strictly Ballroom"

Lou
Under the black cover over the matrix swtich there are 3 black bakelite
slabs (3.5" X 4.5" X ~1/4") with 187 holes sandwiching 185 pins. With the
black cover removed (2 screws) and the card plunger pushed in and you'll
see that the sandwich "floats" on four 8-32 threaded posts. Each of these
posts has 2 nuts sandwiching the slab sandwich. The position of the lower
4 nuts (I called these jam nuts) determines how far in the 185 pins go into
their female counterpart where there is no hole in the card. If there's a
hole in the card the pins must not make contact with their female
counterpart, and this clearance is about the thickness of a dime. In
addtion all these jam nuts must be on the same plane so that the sandwich
is orthagonal and will not bind so it can move smoothly.
A pix would have been easier but the batteries are being charged. Let me
know if you still need a pix.
73
hank wd5jfr

"Lou deGonzague" wrote in message
...
This was a very interesting post Henry, I have one of these and it seems
to
be working OK. I have everything except the cal cell is dead. I would like
to see a pic of those jam nuts that you shouldn't touch if possible as I
thought about cleaning the card reader.
"Henry Kolesnik" wrote in message
...
In this case the "assembler" needed flogging!

hank wd5jfr
"Jeffrey D Angus" wrote in message
...


Henry Kolesnik wrote:

It's fixed, a new day respite helps.

Which just undescores what I've been telling my techs all
along. VERIFY everything before you start flogging the
assembly.

Jeff

--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety." Benjamin Franklin
"A life lived in fear is a life half lived."
Tara Morice as Fran, from the movie "Strictly Ballroom"

This was a very interesting post Henry, I have one of these and it seems to
be working OK. I have everything except the cal cell is dead. I would like
to see a pic of those jam nuts that you shouldn't touch if possible as I
thought about cleaning the card reader.
"Henry Kolesnik" wrote in message
...
In this case the "assembler" needed flogging!

hank wd5jfr
"Jeffrey D Angus" wrote in message
...


Henry Kolesnik wrote:

It's fixed, a new day respite helps.

Which just undescores what I've been telling my techs all
along. VERIFY everything before you start flogging the
assembly.

Jeff

--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety." Benjamin Franklin
"A life lived in fear is a life half lived."
Tara Morice as Fran, from the movie "Strictly Ballroom"

In this case the "assembler" needed flogging!

hank wd5jfr
"Jeffrey D Angus" wrote in message
...


Henry Kolesnik wrote:

It's fixed, a new day respite helps.

Which just undescores what I've been telling my techs all
along. VERIFY everything before you start flogging the
assembly.

Jeff

--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety." Benjamin Franklin
"A life lived in fear is a life half lived."
Tara Morice as Fran, from the movie "Strictly Ballroom"

Henry Kolesnik wrote:

It's fixed, a new day respite helps.

Which just undescores what I've been telling my techs all
along. VERIFY everything before you start flogging the
assembly.

Jeff

--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety." Benjamin Franklin
"A life lived in fear is a life half lived."
Tara Morice as Fran, from the movie "Strictly Ballroom"

On Thu, 5 Feb 2004 11:39:30 -0600 "Henry Kolesnik"
wrote:

But before doing that I thought I'd recheck the 10K ohm Gm
bridge resistors, pot and as I was connecting my Fluke to the10K resistor
lead I could see it was wrapped around the post but not soldered, same for
all of them.

Very nice going, but I'm not able to see your photos (server doesn't
have that newsgroup) so could you describe for the rest of us what
this connection looked like?

thanks,

-
-----------------------------------------------
Jim Adney
Madison, WI 53711 USA
-----------------------------------------------

On Thu, 05 Feb 2004 20:50:02 -0600 Jim Adney
wrote:

On Thu, 5 Feb 2004 11:39:30 -0600 "Henry Kolesnik"
wrote:

But before doing that I thought I'd recheck the 10K ohm Gm
bridge resistors, pot and as I was connecting my Fluke to the10K resistor
lead I could see it was wrapped around the post but not soldered, same for
all of them.

Very nice going, but I'm not able to see your photos (server doesn't
have that newsgroup) so could you describe for the rest of us what
this connection looked like?

Thanks to those who sent photos. Those "posts" are more commonly
called "turrets", I believe.

Finding these missed solder joints must have given you a VERY well
deserved good feeling. Congratulations.

-
-----------------------------------------------
Jim Adney
Madison, WI 53711 USA
-----------------------------------------------