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Tektronix THS7xxx Scope Hack/Teardown/Discussion - FW 1.16 found

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1audio:

--- Quote ---My backlight is very dimmed, I believe the lamp is showing its age. Does anyone have replaced the lamp or added a LED upgrade?
--- End quote ---

I have done both now. Unfortunately the LED is not much brighter than the CCFL lamp. The LCD and optics just are not that bright. However it is a transreflective display so you can see it with the lamp off but in bright light it's not easy to read. I have the two side by side. Its useable but nowhere near as readable as a current LCD scope display. I would just put a new lamp in (cheap and not hard) and move on.

jal1234:
Could somebody who has a pair of calipers do some measurements on the battery door/lid/cap that holds the battery pack in? Mine is missing on my THS720a. I have the metal piece that latches into place, but I'm completely missing the rest of it. I assume there is a groove for an oring to seal the compartment, but I'm not sure. A rough drawing with measurements would be ideal. I was hoping someone might have a 3D printed version, but I haven't been able to find anything.
Thanks in advance.

Gae:
Yeah !
What a great post about this scope !

I have a question about this scope: I could buy one for about 260€, seeing it's a quite "old" design (from the 90's ?) is it worth to get it at this price ? They sell it on "good conditions" with very little use... but of course batteries will be maybe out of order ... and I see they have quite a problem with expensive replacement.
The use will be mainly for audio, don't really need 100MHz but a handled scope is functional for me becouse I may have to repair "in situ" some times.

I have an Hantek DSO8060 but I don't think it's a good scope, the screem is not very accurate and I have problems with after just a few month of use...

Thanks for your help.

HighVoltage:

--- Quote from: Gae on December 26, 2020, 11:33:27 am ---Yeah !
What a great post about this scope !

I have a question about this scope: I could buy one for about 260€, seeing it's a quite "old" design (from the 90's ?) is it worth to get it at this price ? They sell it on "good conditions" with very little use... but of course batteries will be maybe out of order ... and I see they have quite a problem with expensive replacement.
The use will be mainly for audio, don't really need 100MHz but a handled scope is functional for me becouse I may have to repair "in situ" some times.

I have an Hantek DSO8060 but I don't think it's a good scope, the screem is not very accurate and I have problems with after just a few month of use...

Thanks for your help.


--- End quote ---
At 260 Euro in good condition it is still a good scope to have, if you need a portable scope.
Depending on the model you even get two isolated channels and that is a big benefit as well for some applications.

I am still using my THS720p on a regular basis, although I probably have plenty of other and modern scopes.

BravoV:
The major values of this scope are portable and fully isolated at each channel that are suitable for HV works.

If you're buying this at the price, just for low voltage probing as common usage to replace you current Hantek, then I think its a bit of waste, as that kind of money can be used to buy new and more decent or much better DSO.

Also you must take note especially with this scope, you have to use with the HV probes in order to use it at HV probing as where it good at, and these alone if the seller does not supply it, these HV probes, even the Chinese made ones are not that cheap either compared to ordinary cheap x10 scope's probes.

For sure its out of warranty already.

Edit : Almost forgot, the LCD backlight is NOT LED based (CFL), which has much higher risk that it will be dead at anytime soon.

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