Input on O-scopes, B&K Precision or USB based

diesel_tech · 6th February 2011, 08:21 PM

Well I've been using an old Heathkit O-10 to do some realy simple test. I bought a used Tek D-10 but it doesn't work, trace is all screwed up.

So i figure rather than waste money on it, i'd look into buying a new one. I've been looking at the B&K 2534 or the 2540. Have any of you used one? Do you like it? I'd like to use it for testing my home brew amps, and also homebrew AM BCB and SW radios, as well as in an auto motive shop setting, testing PWM circuits. The B&K seem to give a person the best bang for the buck, or if some one has a USB based scope they can highly recomend. I'd like to be 40MHz or higher.

Thanks
Jeremy

bob91343 · 6th February 2011, 09:57 PM

Too bad you are in Colorado. I could probably fix that unit easily.

Basically you aren't getting a horizontal signal to the CRT. Check the potentials and the amplifiers to see what's going on. Put the thing in free running mode and see if that gets it started.

diesel_tech · 6th February 2011, 11:05 PM

The above wave is the output from a low voltage x-former off the AC line. Still thinking its a problem with the horizontal?

Thanks
Jeremy

bob91343 · 6th February 2011, 11:56 PM

Yes I do. It appears that there is undesired coupling between the synch signal and the horizontal amplifier, maybe a bad ground. There is no other way the sweep can go backwards as your picture shows.

diesel_tech · 7th February 2011, 12:25 AM

Thanks, i'll give a look.
Thanks
Jeremy

6th February 2011, 08:21 PM	#1
diesel_tech diyAudio Member Join Date: Dec 2006 Location: Sterling, CO	Input on O-scopes, B&K Precision or USB based Well I've been using an old Heathkit O-10 to do some realy simple test. I bought a used Tek D-10 but it doesn't work, trace is all screwed up. So i figure rather than waste money on it, i'd look into buying a new one. I've been looking at the B&K 2534 or the 2540. Have any of you used one? Do you like it? I'd like to use it for testing my home brew amps, and also homebrew AM BCB and SW radios, as well as in an auto motive shop setting, testing PWM circuits. The B&K seem to give a person the best bang for the buck, or if some one has a USB based scope they can highly recomend. I'd like to be 40MHz or higher. Thanks Jeremy

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6th February 2011, 09:57 PM	#2
bob91343 diyAudio Member Join Date: Mar 2010	Too bad you are in Colorado. I could probably fix that unit easily. Basically you aren't getting a horizontal signal to the CRT. Check the potentials and the amplifiers to see what's going on. Put the thing in free running mode and see if that gets it started.

6th February 2011, 11:05 PM	#3
diesel_tech diyAudio Member Join Date: Dec 2006 Location: Sterling, CO	The above wave is the output from a low voltage x-former off the AC line. Still thinking its a problem with the horizontal? Thanks Jeremy

6th February 2011, 11:56 PM	#4
bob91343 diyAudio Member Join Date: Mar 2010	Yes I do. It appears that there is undesired coupling between the synch signal and the horizontal amplifier, maybe a bad ground. There is no other way the sweep can go backwards as your picture shows.

7th February 2011, 12:25 AM	#5
diesel_tech diyAudio Member Join Date: Dec 2006 Location: Sterling, CO	Thanks, i'll give a look. Thanks Jeremy

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