18 Feb
2002
18 Feb
'02
2:46 p.m.
From: Chad Fernandez <fernande(a)internet1.net>
After posting I realized that I neglected to mention that the humidity here
in Florida most likely contributes to the problem.
Tuner cleaner? Okay, I'll look for it at Radio
Shack. I don't know
else where to look around here.
Also known as "contact cleaner." MCM sells a dozen different ones,
including Rawn Contact Cleaner at $4.99 for the 9 oz. can. Or, you could
visit a TV repair shop and ask if they'd sell you a can or two. I use a
lot of the stuff as it works well for cleaning the contacts on computer
expansion cards and slots, etc.
Your speaking of the line level connections?
Yup, and the headphone jack if there's one present on your amp or other
device.
I for got how heavy this monster is..... it's got
to be about 40 lbs!!
Yeah, my Fisher 404 quadraphonic tuner/amp out in the living-room contains
massive transformers and is *not fun* to move. That sucker really rocks,
though -- I can't turn it up much past 2 1/2 and still stay in the room ;>)
The AM tuner's starting to drift so I'll have to deal with that some day.
Glen
0/0
18 Feb
18 Feb
3:26 p.m.
One other thought about switches and pots: look at
newer decent quality electronic stuff. What you might
think is a "pot" is now an optical or mechanical
interrupter connected to an electronically controlled
digital attenuator/resistor. And when is the last time
you've seen a trimpot on a modern PCB. I repaired a
mid-1990's 35" TV set a year ago (an adjustment
problem) and opened the back to find one (1) trimpot.
Every other (30+) adjustment was digitally stored in
an EEPROM, and the only way to get to that was through
a double secret service code entered via the remote
(which, of course, I discovered using, uhh...by what
we'll call "human" cracking). I would be suprised if
the world electronics industry uses 1/20th of the
potentiometers it used 15 years ago. The last one you
might find in a PC other than in the power supply was
the floppy data separator, and that was history in the
mid 80's. The trimmer cap for the colorburst in a PC
went away with the demise of the CGA.
This bodes ill for Steve's School of Analog Circuit
Design - put 1M 10 turn trimpots in place of all
resistors, and adjust until the circuit works :)
I think ganged pots are already pretty darned scarce
in the surplus market. This is going to get worse as
the last bastions of analog disappear. On the other
hand, what's the first thing to get noisy/go bad on an
old piece of electronic equipment? So, Progress Is
Good. Maybe.
--- Glen Goodwin <acme_ent(a)bellsouth.net> wrote:
__________________________________________________
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From: Chad
Fernandez <fernande(a)internet1.net>
After posting I realized that I neglected to mention
that the humidity here
in Florida most likely contributes to the problem.
Tuner cleaner? Okay, I'll look for it at
Radio
Shack. I don't know
else where to look around here.
Also known as "contact cleaner." MCM sells a dozen
different ones,
including Rawn Contact Cleaner at $4.99 for the 9
oz. can. Or, you could
visit a TV repair shop and ask if they'd sell you a
can or two. I use a
lot of the stuff as it works well for cleaning the
contacts on computer
expansion cards and slots, etc.
Your speaking of the line level connections?
Yup, and the headphone jack if there's one present
on your amp or other
device.
I for got how heavy this monster is..... it's
got
to be about 40 lbs!!
Yeah, my Fisher 404 quadraphonic tuner/amp out in
the living-room contains
massive transformers and is *not fun* to move. That
sucker really rocks,
though -- I can't turn it up much past 2 1/2 and
still stay in the room ;>)
The AM tuner's starting to drift so I'll have to
deal with that some day.
Glen
0/0 
19 Feb
19 Feb
2:12 a.m.
Quothe Loboyko Steve, from writings of Mon, Feb 18, 2002 at 09:26:08PM -0800:
the last bastions of analog disappear. On the other
hand, what's the first thing to get noisy/go bad on an
old piece of electronic equipment? So, Progress Is
Good. Maybe.
Not really, since far too many companies produce produce with volume
controls, for example, that are too limited in the number of
increments; they don't allow one to get the volume "just right," and
are a nuisance. The disappearance of pots isn't the only problem;
variable capacitors are going away as well. Analog radio tuners have
benefits as well. Digital circuitry needs to be kept in its place and
not used where it doesn't work as well as analog circuitry. Too much
overcomplication just so that people can say that something is
"digital" ...as if the average consumer actually understands what
digital electronics is.
--
Copyright (C) 2001 R. D. Davis The difference between humans & other animals:
All Rights Reserved an unnatural belief that we're above Nature &
rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to justify such
http://www.rddavis.org beliefs and to justify much human cruelty.
5:42 a.m.
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18 Feb
18 Feb
3:44 p.m.
Glen Goodwin wrote:
I don't think I've ever used the headphone jack..... I don't have any
headphones :-) It's been a long time since I've used them often.....
usually when I was young (mid to late 80's) listening to the radio, when
I was supposed to be sleeping :-)
Do you have a picture of it? I'd love to see it. Quadraphonic
Equipment is something I've never seen at Goodwill. Either most people
got rid of it long ago, or people are hanging on to it.
My amp, may be even a little heavier then 40 lbs. I think it is heavier
than what I remember a 45lb Olympic size weight feeling like.
Chad Fernandez
Michigan, USA
Also known as "contact cleaner." MCM sells
a dozen different ones,
including Rawn Contact Cleaner at $4.99 for the 9 oz. can. Or, you could
visit a TV repair shop and ask if they'd sell you a can or two. I use a
lot of the stuff as it works well for cleaning the contacts on computer
expansion cards and slots, etc.
Oh... Well maybe that is about what I've purchased at Lowes before
then. I think one of the cans I bought was labeled as contact cleaner.
Your speaking of the line level connections?
Yup, and the headphone jack if there's one present on your amp or other
device. I for got how heavy this monster is..... it's
got to be about 40 lbs!!
Yeah, my Fisher 404 quadraphonic tuner/amp out in the living-room contains
massive transformers and is *not fun* to move. That sucker really rocks,
though -- I can't turn it up much past 2 1/2 and still stay in the room ;>)
The AM tuner's starting to drift so I'll have to deal with that some day.
8344
days inactive
8345
days old
4 comments
5 participants
participants (5)
-
acme_ent＠bellsouth.net -
ard＠p850ug1.demon.co.uk -
fernande＠internet1.net -
rdd＠rddavis.org -
sloboyko＠yahoo.com