Tektronix 485/R485 Service Manual in exceedingly clean condition with bright pages and no markings. Fold-out diagrams and schematics intact, clean, and bright. Covers very slightly dog-eared as are

I managed to free the EXT÷10 switch through the generous application of WD-40 and moderate physical force. I can now use the other three SOURCE selections, which was my goal. The EXT÷10 switch

I do have a 1240 that could use a new home - the problem is that I'm up in Canada though. IMHO its best feature is that it can capture a boatload of channels simultaneously which is something my USB

Hi Jared, This is strange. I suppose both generators have rise time below .1 ns. This would increase the "true" risetime of a 60 MHz scope by an invisible amount (according to root-sum-of-squares

Roy, I'm definitely in the "collectible compulsive" category. I've got a use case, but it's also more of a compulsion (building a 6809-based personal computer, decoding the display interface on a

I think I figured it out, usual PEBKAC error. :D Seems I had to tweak the internal and external TD Bias settings a bit more to get it to fire properly. I think it's working ok now hopefully. Seems

Unlike some, I do use a logic analyzer, but it depends very much on the application. I do FPGA design, so monitoring all those digital outputs is a task.  I also look at SPI, which needs fast.  I2C

On my phone so I will not be a wordy as usual. The tunnel diode is not firing. Unfortunaly you will need to service the air line. The GOOD news is the tunnel diode is most likely good of you are

I am using a HP 50 ohm terminator (11048C) already, but here is the waveform with DC coupling: https://i.imgur.com/YhTbdAe.png Thanks! Jared

Can you use 50 ohm term and DC coupling? -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

Just wondering if anyone has managed to clean attenuator switch banks in a 465. I know IPA should be used but not sure how to get this into the switch.

I recently acquired an almost mint condition Type 284 Pulse Generator, except it has an issue with the pulse output. It only gives a strange waveform that doesn't look right to

No... I get it (an it may yet be silliness) but having older stuff is sometimes required for replicating measurements... and it can make you feel like your back in the 1980s too. Problem is... a lot

Bruce, Good to know, for several reasons: first, my original plan was to epoxy the switch body back in place after cutting the heat staked pins, and trying to free the stuck switch with silicone

Probably... if I live long enough to get around to it... I'll post some stuff about 7A42. But, I looked at it... and in it... and just looking at it makes me think there's not much chance of it

Hi Jeff: Unless it a collectable's compulsive buy... why do you need one of those old LAs? To actually use it, you need the pods and the cables... which usually don't come with them.... but,

Yes, I agree... and of course it's a preference thing... but HP LAs appeal to many here, while HP scopes lose out to Tek. Lots of old HP LA holding down the basement floor everywhere... they're not

Hi SD Well... it's hard to find one with the pods, and expansion modules... but they're usually in good shape cosmetically (they're 40 years old!)... and just the analyser (sans pods, modules) isn't

If you are ever going to adhesively bond (aka glue) any part of the assembly I would not use any silicone product. They are almost impossible to remove and adhesives don't stick to them.

Small...15 volt uni-polar... even bi-polar... pure chinesium... 15 VDC power supplies are quite affordable (less than, or about 20.00 USD)... about 3A or 5A. The quality varies... but, some have a