I found a 465 at the dump with a sticker on it saying "Horizontal
deflection bad". Before I even power it up I thought that I'd get
opinions on how bad the problem likely is. Best case: "That happens all
the time & it's a bad Qxxx transistor in the framazazzle". LOL Worst
case: "It could be any number of things and you'll likely spend hours
and hours to fix a $100 scope". I do have the service manual & another scope.
Thanks, Bob
I found a 465 at the dump with a sticker on it saying "Horizontal
deflection bad". Before I even power it up I thought that I'd get
opinions on how bad the problem likely is. Best case: "That happens all
the time & it's a bad Qxxx transistor in the framazazzle". LOL Worst
case: "It could be any number of things and you'll likely spend hours
and hours to fix a $100 scope". I do have the service manual & another scope.
Thanks, Bob
In article <sgih9...@news1.newsguy.com>, BobEng...@comcast.net_________
says...
I found a 465 at the dump with a sticker on it saying "Horizontal deflection bad". Before I even power it up I thought that I'd get
opinions on how bad the problem likely is. Best case: "That happens all
the time & it's a bad Qxxx transistor in the framazazzle". LOL Worst
case: "It could be any number of things and you'll likely spend hours
and hours to fix a $100 scope". I do have the service manual & another scope.
Thanks, BobThat's what I call "right to repair". In the UK it is not permitted to
take kit away from a dump, in case you are not as competent as you think
you are...
I found a 465 at the dump with a sticker on it saying "Horizontal
deflection bad". Before I even power it up I thought that I'd get
opinions on how bad the problem likely is. Best case: "That happens all
the time & it's a bad Qxxx transistor in the framazazzle". LOL Worst
case: "It could be any number of things and you'll likely spend hours
and hours to fix a $100 scope". I do have the service manual & another >scope.
Thanks, Bob
I found a 465 at the dump with a sticker on it saying "Horizontal
deflection bad". Before I even power it up I thought that I'd get
opinions on how bad the problem likely is. Best case: "That happens all
the time & it's a bad Qxxx transistor in the framazazzle". LOL Worst
case: "It could be any number of things and you'll likely spend hours
and hours to fix a $100 scope". I do have the service manual & another
scope.
I found a 465 at the dump with a sticker on it saying "Horizontal
deflection bad". Before I even power it up I thought that I'd get
opinions on how bad the problem likely is. Best case: "That happens all
the time & it's a bad Qxxx transistor in the framazazzle". LOL Worst case: "It could be any number of things and you'll likely spend hours
and hours to fix a $100 scope". I do have the service manual & another scope.
Thanks, Bob
On Mon, 30 Aug 2021 08:01:01 -0400, Bob Engelhardt
<BobEng...@comcast.net> wrote:
I found a 465 at the dump with a sticker on it saying "Horizontal >deflection bad". Before I even power it up I thought that I'd get
opinions on how bad the problem likely is. Best case: "That happens all >the time & it's a bad Qxxx transistor in the framazazzle". LOL Worst
case: "It could be any number of things and you'll likely spend hours
and hours to fix a $100 scope". I do have the service manual & another >scope.
Thanks, BobIt's a relatively simple part of the scope, if it's
an accurate diagnosis.
Helps if you have a working scope to repair this one.
https://groups.io/g/TekScopes/messages
RL
On Monday, August 30, 2021 at 10:19:13 AM UTC-4, Mike Coon wrote:
In article <sgih9...@news1.newsguy.com>, BobEng...@comcast.net
says...
I found a 465 at the dump with a sticker on it saying "Horizontal deflection bad". Before I even power it up I thought that I'd get opinions on how bad the problem likely is. Best case: "That happens all the time & it's a bad Qxxx transistor in the framazazzle". LOL Worst case: "It could be any number of things and you'll likely spend hours
and hours to fix a $100 scope". I do have the service manual & another scope.
_________Thanks, BobThat's what I call "right to repair". In the UK it is not permitted to
take kit away from a dump, in case you are not as competent as you think you are...
Where do you think I got my stash of spare TV remotes from?
If a bar's got a Sony on the wall, in Vivid mode, Im can whip out
my Sony remote, and at least put it in Standard mode.
I second the motion to join & post on the TekScopes message board.
A lot of *very* knowledgeable ppl hang out there.
A 465 is a very well-known and popular scope.
It was standard gear for DEC and IBM field circus back in the day,
Phil Allison wrote:
-----------------------
Correction:
** Had the use of the earlier & similar a Tek 453 for a couple of years.
Phil Allison wrote:
-----------------------
Correction:
** Had the use of the earlier & similar a Tek 453 for a couple of years.
** Had the use of the earlier & similar a Tek 453 for a couple of years.
**The 453 used Nuvistors in parts of the machine. It also had this
horrible 'flyscreen' covering the CRT display.
three_jeeps wrote:
------------------------------
I second the motion to join & post on the TekScopes message board.
A lot of *very* knowledgeable ppl hang out there.
** Antique scope freaks .....
A 465 is a very well-known and popular scope.
It was standard gear for DEC and IBM field circus back in the day,
** Had the use of the earlier & similar a Tek 463 for a couple of years.
On loan, from a Sydney based IBM engineer - son of the man I worked for.
Not very fond of it cos it lacked the one thing a good analogue scope needs.
A sharply focused trace.
** Had the use of the earlier & similar a Tek 463 for a couple of years.
On loan, from a Sydney based IBM engineer - son of the man I worked for. Not very fond of it cos it lacked the one thing a good analogue scope needs.
A sharply focused trace.
Low-bandwidth scopes tended to have better focus.
The noise of the vertical amplifiers
If a bar's got a Sony on the wall, in Vivid mode, Im can whip out my
Sony remote, and at least put it in Standard mode.
Low-bandwidth scopes tended to have better focus. The noise of the
vertical amplifiers can of course be reduced by filtering out the high frequency noise afterwards. The trace on a 475 gets quite a bit sharper
when it is set into low-bandwidth mode. Perhaps it is an argument for
having two scopes, one with a sharp trace and one with more bandwidth. I haven't got any reasonable justification for the number of analogue
scopes that I have though, apart from "that looks too good to stay in
the dumpster".
Many wideband scopes can be switched to 20MHz mode to mask harmonics and stray RF pickup.
bobenge...@gmail.com wrote:
=========================
I found a 465 at the dump with a sticker on it saying "Horizontal
deflection bad". Before I even power it up I thought that I'd get
opinions on how bad the problem likely is. Best case: "That happens all
the time & it's a bad Qxxx transistor in the framazazzle". LOL Worst
case: "It could be any number of things and you'll likely spend hours
and hours to fix a $100 scope". I do have the service manual & another
scope.
** You are asking a " Schrodinger's Cat " type question.
The cat can be thought dead or alive - until you open the box.
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