开云体育

I got a 2465B, 400MHz, while dumpster diving a while back. It seems to work perfect. I do not have a lot of use for an Analog scope, (especially w/o GPIB) but if I decide to sell it on EBAY, or even if I decide to use it for trouble-shooting, I need to clean it up. There is some dried liquid behind the BLUE crt filter (maybe cat pee).

Beside the four torx screws on the bottom, how to I take the bezel off to clean it? i remember reading where it is real easy to break the knobs removing the bezel. I assume only the four knobs under the CRT need to come off?

I don't know if this would be scope with capacitor issues or not. At this time, it seems to be working well. It does not seem to be the easiest scope to get used to its operation, especially the measurement functions. I don't think it has cursors; I be more prone to keep and use it if it did.

When cleaned up, without re-capping (don't know if it needs it or not), what kind of value is it, if I were to sell it. The effort of finding/making a good double-boxing system may not be worth it.

Thanks kindly,

Dave

Hi Dave,

The 2465B does (should!) have measurement cursors for time and/or amplitude but you have to enable them to see them. Not sure the exact buttons that do that but it should be easy enough to find that info.

Nice dumpster find!

Thanks,
Barry - N4BUQ

There is a plastic trim strip on the top of the bezel that snaps off revealing some additional screws.

Manuel

The knobs don’t have to come off. This is how I do it all the time. I usually take the case off when doing this but the scope needs a front cover which you may not have. But it if you set the face on carpet and carefully and don’t put alott of pressure on the controls of the front panel. Remove the rear screws 4 #20 torx and 2 #15 torx if all screws are still in rear cover. Then slide the case off the back. Then set on a table with the front Basel just off of the tables edge now or later as in this info. Take a small screwdriver and get under the edge of the strip on top of front bezel and pry it up moving along from one end to the other. Do this carefully as the little plastic tabs will come out . Then you now have access to all 8 #10 torx screws. 4 on top and 4 on the bottom. Then set the front just off the edge of the table and rock it easily to pull the entire assembly forward. The knobs and the knob retainers will cone off of the potentiometer shafts all together. Just work it forward easy mainly pulling on the screen side a little more. Then when putting it back on. Get the front started on the potentiometers, might have to move the knobs bu turning them a bit to get it to line up the carefully work the front Bezel back on. Then leave the bezel cover strip off reinstall the case and back then put bezel strip back on.
Removing knobs is very hard and 80% of the time they will break there internal clips.

Craig

" The 2465B does (should!) have measurement cursors for time and/or
amplitude but you have to enable them to see them.

Nice dumpster find!
"

Yea, I found them, before putting it aside this morning to do paying work -
lol.

The 2465B seems like a really nice analog scope with a very nice CRT. I
just use TDS3000 series on a daily basis.

Also in the dumpster find was what appears to be a useless very early
attempt at a digital controlled scope, the Tektronix 2430A. As far as I
can tell, it works and is in very good shape, and a great CRT, but wow,
what a slug to operate. It's another one that I am probably too dumb to
operate - lol. Heck it even has GPIB.

I love to write software to control GPIB equipment. I don't know if that
2430A is worth my time to add it to some of my utility or calibration
programs.

I grew up around the round screen beautiful boat anchors (500/600
series?). That's all my tech school had in 1979. On the job I grew up
with the Ultra-modern (for me at the time) 465. A 465 traveled with me all
over the county. When its CRT was replaced, I even had the beautiful blue
phosphor. My next scope in the 90's was a 2247A. After that, I went right
in to the TDS3000 series. I haven't used an analog scope in years. I still
keep a 465 on the bench but it has flaky cam switched in the amplifiers.
even though it may never get turned on, I may just replace the 465 with the
2465B. If I did it honor and service, I would open it up and re-cap it. I
just know if I have the energy to do that. i also dumpster-ed a 520A and
524A and another 52x. All broken (power supply and probably cap issues on
the ACQ boards). They are beautiful when working. I would love to get one
of those working, but I doubt I will ever take the time. i might even be
willing to pay to have one of those fixed to use. Anyway, I digress....

Dave

Craig,

Thank you kindly for those detailed instruction, which I have printed out.
Perhaps later today, I will follow them and get that puppy cleaned out and
generally look inside for cap leakage.

Dave

On Thu, Nov 1, 2018 at 10:54 AM Craig Cramb <electronixtoolbox@...>
wrote:

The knobs don’t have to come off. This is how I do it all the time. I
usually take the case off when doing this but the scope needs a front cover
which you may not have. But it if you set the face on carpet and carefully
and don’t put alott of pressure on the controls of the front panel. Remove
the rear screws 4 #20 torx and 2 #15 torx if all screws are still in rear
cover. Then slide the case off the back. Then set on a table with the front
Basel just off of the tables edge now or later as in this info. Take a
small screwdriver and get under the edge of the strip on top of front bezel
and pry it up moving along from one end to the other. Do this carefully as
the little plastic tabs will come out . Then you now have access to all 8
#10 torx screws. 4 on top and 4 on the bottom. Then set the front just off
the edge of the table and rock it easily to pull the entire assembly
forward. The knobs and the knob retainers will cone off of the
potentiometer shafts all together. Just work it forward easy mainly pulling
on the screen side a little more. Then when putting it back on. Get the
front started on the potentiometers, might have to move the knobs bu
turning them a bit to get it to line up the carefully work the front Bezel
back on. Then leave the bezel cover strip off reinstall the case and back
then put bezel strip back on.
Removing knobs is very hard and 80% of the time they will break there
internal clips.

Craig

On Nov 1, 2018, at 8:52 AM, David Kuhn <Daveyk021@...> wrote:

Beside the four torx screws on the bottom, how to I take the bezel off

to clean it? i remember reading where it is real easy to break the knobs
removing the bezel. I assume only the four knobs under the CRT need to
come off?

On Thu, 1 Nov 2018 11:32:24 -0400, you wrote:

" The 2465B does (should!) have measurement cursors for time and/or
amplitude but you have to enable them to see them.

Nice dumpster find!
"

Yea, I found them, before putting it aside this morning to do paying work -
lol.

The 2465B seems like a really nice analog scope with a very nice CRT. I
just use TDS3000 series on a daily basis.

Also in the dumpster find was what appears to be a useless very early
attempt at a digital controlled scope, the Tektronix 2430A. As far as I
can tell, it works and is in very good shape, and a great CRT, but wow,
what a slug to operate. It's another one that I am probably too dumb to
operate - lol. Heck it even has GPIB.

They aren't that bad. They can do well. Not really useless, IMHO.

I love to write software to control GPIB equipment. I don't know if that
2430A is worth my time to add it to some of my utility or calibration
programs.

Probably is, you might be surprised at what it will do, or can do.

There are things analog scopes will do that digital scopes won't, or
don't do quite the same way.

I have the 7000 series, a 2430A, and a TDS540A, and the digitals get
used for one set of things, the analogs get used for another. Neither
technology is best for everything.

Harvey

I grew up around the round screen beautiful boat anchors (500/600
series?). That's all my tech school had in 1979. On the job I grew up
with the Ultra-modern (for me at the time) 465. A 465 traveled with me all
over the county. When its CRT was replaced, I even had the beautiful blue
phosphor. My next scope in the 90's was a 2247A. After that, I went right
in to the TDS3000 series. I haven't used an analog scope in years. I still
keep a 465 on the bench but it has flaky cam switched in the amplifiers.
even though it may never get turned on, I may just replace the 465 with the
2465B. If I did it honor and service, I would open it up and re-cap it. I
just know if I have the energy to do that. i also dumpster-ed a 520A and
524A and another 52x. All broken (power supply and probably cap issues on
the ACQ boards). They are beautiful when working. I would love to get one
of those working, but I doubt I will ever take the time. i might even be
willing to pay to have one of those fixed to use. Anyway, I digress....

Dave

On Thu, Nov 1, 2018 at 10:15 AM n4buq <n4buq@...> wrote:

Hi Dave,

The 2465B does (should!) have measurement cursors for time and/or
amplitude but you have to enable them to see them. Not sure the exact
buttons that do that but it should be easy enough to find that info.

Nice dumpster find!

Thanks,
Barry - N4BUQ

I don't know if this would be scope with capacitor issues or not. At

this

time, it seems to be working well. It does not seem to be the easiest

scope

to get used to its operation, especially the measurement functions. I
don't think it has cursors; I be more prone to keep and use it if it did.

Thanks kindly,

Dave

Okay, I think the analog would be more useful possibly in trouble-shooting,
but I am so experienced in the TDS3000 series, that I love trouble-shooting
with it, plus I know the equipment so well that I work on, I am rarely
stumped anymore. I get out of the habit of really trouble-shooting anymore.

i worked with the 2430A a little this morning and I was wrong with my
original assessment. i had just looked at in t a hallway before putting it
away. With a scope probe, it really isn't too bad. The trace adjustment
take a little to get used to. It passed self-diagnosis. I just need to
spend time with it. Would it be worthwhile to put on EBAY if I decided
to? I really don't have a lot of selling experience and with me having a
business, I would have to pay taxes on whatever it sold for and then the
government gets about half, so it really wouldn't be worth the effort.
Anywho, back to work. Thanks for the response.

Dave

On Thu, 1 Nov 2018 12:14:50 -0400, you wrote:

Okay, I think the analog would be more useful possibly in trouble-shooting,
but I am so experienced in the TDS3000 series, that I love trouble-shooting
with it, plus I know the equipment so well that I work on, I am rarely
stumped anymore. I get out of the habit of really trouble-shooting anymore.

Any digital scope is a sampling system, so it looks at a waveform,
does an average during the sample period, and then ignores the signal
to the next sampling period.

Pretty much as long as you sample fast enough, you'll get most of
everything. However, when you get to the upper limit of the scope's
frequency response, the analog scope fails gracefully, at least giving
you an idea of something there. The digital scope has a relatively
sharp cutoff to keep aliasing down, and has a different kind of
response.

Where the digital scope is superior, IMHO, has to do with the storage
and computation functions. A 7000 series scope can get pretty close
to a lot of the things a digital scope can do, within limits,of
course.

I've got analog scopes that go to 1 Ghz, digital ones that go to 500
Mhz (and the main analog scope is a 7904, so 500 Mhz). I have
sampling units that can go to about 10 Ghz, in case I need to look
there (haven't so far).

i worked with the 2430A a little this morning and I was wrong with my
original assessment. i had just looked at in t a hallway before putting it
away. With a scope probe, it really isn't too bad. The trace adjustment
take a little to get used to. It passed self-diagnosis. I just need to
spend time with it. Would it be worthwhile to put on EBAY if I decided
to?

Can't answer there, you may want to consider a private sale to someone
on the list rather than ebay. Best is selling in person so that both
people get an idea of what they're getting.

I really don't have a lot of selling experience and with me having a
business, I would have to pay taxes on whatever it sold for and then the
government gets about half, so it really wouldn't be worth the effort.

If the business bought it, then likely yes, if you bought it, then
it's a private sale, I'd think. Definitely not an expert here.

oh, and Hamfests are a good possibility depending on where you are.

Anywho, back to work. Thanks for the response.

Sure. Definitely

Harvey

Dave

On Thu, Nov 1, 2018 at 11:49 AM Harvey White <madyn@...> wrote:

On Thu, 1 Nov 2018 11:32:24 -0400, you wrote:

" The 2465B does (should!) have measurement cursors for time and/or
amplitude but you have to enable them to see them.

Nice dumpster find!
"

Yea, I found them, before putting it aside this morning to do paying work

-

lol.

The 2465B seems like a really nice analog scope with a very nice CRT. I
just use TDS3000 series on a daily basis.

Also in the dumpster find was what appears to be a useless very early
attempt at a digital controlled scope, the Tektronix 2430A. As far as I
can tell, it works and is in very good shape, and a great CRT, but wow,
what a slug to operate. It's another one that I am probably too dumb to
operate - lol. Heck it even has GPIB.

They aren't that bad. They can do well. Not really useless, IMHO.

I love to write software to control GPIB equipment. I don't know if that
2430A is worth my time to add it to some of my utility or calibration
programs.

Probably is, you might be surprised at what it will do, or can do.

There are things analog scopes will do that digital scopes won't, or
don't do quite the same way.

I have the 7000 series, a 2430A, and a TDS540A, and the digitals get
used for one set of things, the analogs get used for another. Neither
technology is best for everything.

Harvey

I grew up around the round screen beautiful boat anchors (500/600
series?). That's all my tech school had in 1979. On the job I grew up
with the Ultra-modern (for me at the time) 465. A 465 traveled with me

all

over the county. When its CRT was replaced, I even had the beautiful blue
phosphor. My next scope in the 90's was a 2247A. After that, I went right
in to the TDS3000 series. I haven't used an analog scope in years. I

still

keep a 465 on the bench but it has flaky cam switched in the amplifiers.
even though it may never get turned on, I may just replace the 465 with

the

2465B. If I did it honor and service, I would open it up and re-cap it.

I

just know if I have the energy to do that. i also dumpster-ed a 520A and
524A and another 52x. All broken (power supply and probably cap issues on
the ACQ boards). They are beautiful when working. I would love to get

one

of those working, but I doubt I will ever take the time. i might even be
willing to pay to have one of those fixed to use. Anyway, I digress....

Dave

On Thu, Nov 1, 2018 at 10:15 AM n4buq <n4buq@...> wrote:

Hi Dave,

The 2465B does (should!) have measurement cursors for time and/or
amplitude but you have to enable them to see them. Not sure the exact
buttons that do that but it should be easy enough to find that info.

Nice dumpster find!

Thanks,
Barry - N4BUQ

I don't know if this would be scope with capacitor issues or not. At

this

time, it seems to be working well. It does not seem to be the easiest

scope

to get used to its operation, especially the measurement functions.

I

don't think it has cursors; I be more prone to keep and use it if it

did.

Thanks kindly,

Dave

Or, you could just slide the blue filter up, and out at the bottom
and remove it. The gorp might be just there.

-Chuck Harris

David Kuhn wrote:

" Or, you could just slide the blue filter up, and out at the bottom
and remove it. The gorp might be just there. "

Thank you Chuck. I did not know you could do that. It was rather easy and
it cleaned up nicely!! The blue filter re-installed just as easy as it
came out.

Dave

On Thu, Nov 1, 2018 at 06:52 AM, David Kuhn wrote:

I got a 2465B, 400MHz, while dumpster diving a while back. It seems to work
perfect. I do not have a lot of use for an Analog scope, (especially w/o
GPIB) but if I decide to sell it on EBAY, or even if I decide to use it for
trouble-shooting, I need to clean it up. There is some dried liquid behind
the BLUE crt filter (maybe cat pee).

Beside the four torx screws on the bottom, how to I take the bezel off to
clean it? i remember reading where it is real easy to break the knobs
removing the bezel. I assume only the four knobs under the CRT need to come
off?

Dave, wow what a dumpster find, congratulations you won the lottery. Just in case and for future references, I've heard people had very good results removing those stuck knobs by carefully heating them up first with a hot air gun. After so long, it seems most are indeed stuck and will brake if forced to come off. By warming them up they slightly expand and slide off much easier without harm. Hope that is useful information.

Alex

How much do you ask for your 2465B (should be sent to Amsterdam Netherland?
My email: sp856567@...