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#1125 Reply
Posted by
AMR Labs
on 10 Aug, 2018 12:25
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Does anybody know why some 24xx scopes don't seem to have the blue filter installed over the screen? Was the filter an option, or is it removable? If I get a scope without the blue filter, is it easy to get one and reinstall it? Personally I think the filter helps quite a bit, and don't understand why anyone would remove it to use a scope without it being present.
Still looking for my future 24xx...
Thanks.
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#1126 Reply
Posted by
BravoV
on 10 Aug, 2018 16:05
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Its removeable easily and installation too, not a big deal, just read the service manual, there is a graphical illustration.
I guess on those that removed, prolly they were badly scratched or cracked as its just sort of acrylic blue thingy.
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#1127 Reply
Posted by
james_s
on 10 Aug, 2018 16:14
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Perhaps it worked better with a scope camera to not have the filter? Seems like the filter is easily removable on my 465 too, looks better with it on though.
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#1128 Reply
Posted by
BravoV
on 13 Aug, 2018 08:12
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Perhaps it worked better with a scope camera to not have the filter? Seems like the filter is easily removable on my 465 too, looks better with it on though.
To my eyes, on camera its better with filter on, shot this while ago.
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#1129 Reply
Posted by
AMR Labs
on 19 Aug, 2018 13:38
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Guys I have still no idea, even with the possibility of the filter not allowing good pictures etc, why so many of these scopes out there seem to be missing the blue filter. Or is it perhaps that the scope picture taking crowd is/was larger than one would think? I have to agree the screen looks so much better with the filter attached, so why would anyone remove it (ok besides scratched/broken which i would think is just a minority of the cases (?). Anyhow I am glad it would be an easy fix, maybe someone out there would have one to sell. But first is first, getting a scope to go with the filter, or ideally not needing to look for one to begin with.
Also wanted to ask, would a 2465A low SN under 50K (~10000) have SMD boards, or would the components be through hole? In this same model would there also be the possibility of having the dreaded cap rot on the A5 board, and a dying NVRam module? I'm asking because I read that some of these scopes do not have these problems.
Is there a reference table out there somewhere that would help to have a better idea of the innards of the scope in relation to its model/version/serial number?
Thanks.
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#1130 Reply
Posted by
james_s
on 19 Aug, 2018 17:36
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Maybe the filter was an optional accessory that not everyone chose to purchase? You can get sheets of colored gel at camera and theatrical shops in a wide range of shades, there may be one that's a good match for the blue filter if anyone is looking to add one.
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#1131 Reply
Posted by
Satbeginner
on 19 Aug, 2018 17:44
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Many of the filters just got lost, like the front covers.
Especially the front covers, they all seem to end up as pencil cases in some deskdrawer.
The filters were designed for an easy removal in the case of a film scope-camera.
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#1132 Reply
Posted by
tkamiya
on 19 Aug, 2018 17:52
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I have a 2465BCT with Dallas chip that is toast. All cal data is GONE. Would anyone be so kind to point me to a right direction? I really don't want to cal this scope as I don't need that kind of precision.
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#1133 Reply
Posted by
AMR Labs
on 19 Aug, 2018 18:07
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Especially the front covers, they all seem to end up as pencil cases in some deskdrawer.
Maybe we need to start using different search terms on ebay, like "Blue Pencil Tray" or "holder". Some time ago, just to see what came up, I tried looking for a 2465 front cover, but not one positive result came back.
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#1134 Reply
Posted by
Satbeginner
on 19 Aug, 2018 18:15
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I have a 2465B with option 06 (I believe that is the CT).
When I revived my unit -A5 capacitor leaking- I also replaced the Dallas and calibrated my scope.
I can send you my Dallas contents, but you need to replace and program the Dallas.
I put my Dallas in a socket, so it was easy to backup the data after calibration using a programmer.
All pins can be cleared using a sucker, only pin 14 needs to be removed while putting a soldering iron on it, because of the ground plane it needs a bit more heat.
To remove the Dallas, I remove the tin around a pin, then I wiggle each pin using a small pair of pliers a bit so I see the pin is loose, before pulling, this to protect the vias in he PCB.
Obviously there is no guarantee that your scope will be close to it's normal function when you use my caldata.
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#1135 Reply
Posted by
David Hess
on 19 Aug, 2018 19:35
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Maybe we need to start using different search terms on ebay, like "Blue Pencil Tray" or "holder". Some time ago, just to see what came up, I tried looking for a 2465 front cover, but not one positive result came back.
The sellers often do not know which instrument the cover goes to or do not list them all.
When I was cover shopping, I had the dimensions which sellers often list and just did a search for Tektronix and oscilloscope covers.
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#1136 Reply
Posted by
tkamiya
on 19 Aug, 2018 20:26
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I have a 2465B with option 06 (I believe that is the CT).
Obviously there is no guarantee that your scope will be close to it's normal function when you use my caldata.
If you don't mind, I'd love to have what you have. tkamiya9(at)yahoo.com please!
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#1137 Reply
Posted by
Satbeginner
on 19 Aug, 2018 20:45
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Message send
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#1138 Reply
Posted by
tkamiya
on 19 Aug, 2018 20:50
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Received. Thank you!
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#1139 Reply
Posted by
Satbeginner
on 19 Aug, 2018 20:57
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#1140 Reply
Posted by
tkamiya
on 19 Aug, 2018 21:30
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Now I need to buy a programmer. Purchases never end. Shrinking budget never stops. until it reaches zero.
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#1141 Reply
Posted by
Satbeginner
on 19 Aug, 2018 21:44
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#1142 Reply
Posted by
BravoV
on 20 Aug, 2018 02:07
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#1143 Reply
Posted by
AMR Labs
on 20 Aug, 2018 02:38
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So getting back to my other question, what do you guys think about an early serial (under 50K) 2465A version scope, possibly showing an error message on screen at power up, but that otherwise seems to properly display traces and cursors, a bit dusty on the outside but no broken shafts or missing knobs buttons, or any other obvious damage, etc, no front cover or probes, but yes it has the blue screen filter. I have not had a chance to see it personally, but this is what i have so far been able to glean into the situation, and I am still haggling with the owner over a compromise price given probable problems. Just like trying to buy a car without even test driving it first, so how much trouble could I possibly get into....? Ha!
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#1144 Reply
Posted by
med6753
on 20 Aug, 2018 03:28
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So getting back to my other question, what do you guys think about an early serial (under 50K) 2465A version scope, possibly showing an error message on screen at power up, but that otherwise seems to properly display traces and cursors, a bit dusty on the outside but no broken shafts or missing knobs buttons, or any other obvious damage, etc, no front cover or probes, but yes it has the blue screen filter. I have not had a chance to see it personally, but this is what i have so far been able to glean into the situation, and I am still haggling with the owner over a compromise price given probable problems. Just like trying to buy a car without even test driving it first, so how much trouble could I possibly get into....? Ha!
To answer your prior question from earlier. The A5 board in the 2465A is pin thru hole. At least that's what the service manual shows. Could later S/N's be SMD? Wouldn't surprise me.
What is the error message? Can you get the seller to tell you?
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#1145 Reply
Posted by
AMR Labs
on 20 Aug, 2018 13:38
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I am asking him to send me a picture of the error message, but he really doesn't know much about scopes. I am not sure of the procedure to bring up the error message myself, but I assume telling him to just turn on the scope and then taking a picture of the first screen he will see would be enough to capture the error message? Thanks for the input.
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#1146 Reply
Posted by
med6753
on 20 Aug, 2018 15:26
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I am asking him to send me a picture of the error message, but he really doesn't know much about scopes. I am not sure of the procedure to bring up the error message myself, but I assume telling him to just turn on the scope and then taking a picture of the first screen he will see would be enough to capture the error message? Thanks for the input.
Yes, when you press power on the scope will boot and then stop at the error message. It will be displayed across the bottom of the screen.
Edit....here's an example:
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#1147 Reply
Posted by
AMR Labs
on 20 Aug, 2018 15:54
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OK got it, that was very helpful. I was thinking the error message would be displayed more towards the middle of the screen, where I saw something on an earlier picture but it was way too blurry to be readable because of unsteadiness of the camera. Is there any other type of message that would come up at some point in or around the center of the screen? Thanks.
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#1148 Reply
Posted by
AMR Labs
on 20 Aug, 2018 17:11
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Another useful bit of information at this point while looking for a 246x scope would be if there is an error code specific to an instrument that has lost its calibration constants? Is there such error message, or is there anything else I would need to look out for to know for sure that the calibration is gone? Thanks.
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#1149 Reply
Posted by
David Hess
on 20 Aug, 2018 20:00
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