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If all all the indicator lights work including triggering with signals applied but there is no beam, it is most likely a bad HV multiplier. The blown multiplier will load down the -2750V so that might

Grant - I have both 7934, 7104, and 7904A. I believe the power supplies are interchangable. It would be a good idea to keep the power supply from the 7834 IF is is the same as the 7904. The Tek

Hello: These usually have bad or failing HV trsf and/or HV mults and PSU lytics. Parts and repair is not trivial. The 475B are much later and more desirable. Typically shipping these is risky and

I got a 475 from a ham estate. It is in very good physical shape and appears to be complete. It seems to power up and the controls illuminate as they should. But, no video. I pull off the cover. Found

Hi all, I'm looking for a bit of realistic perspective here.? A maybe 8 months back I had purchased some Tek stuff from the 'friend' of a widow (later realized he was a weasel).? I didn't do a close

To close the loop on this question, yes it's entirely possible and not particularly difficult to upgrade a TDS20xxC series. It takes three pieces/resources/steps. First is to install the communication

Interleaved: I don't have a copy of the user manual with me, may have one elsewhere. I'd say so.? Everything we get on the older scopes, the better.

I am testing several 556's that will be for sale and one has a lower beam that behaves badly with different plugins installed, so the gain in the mainframe is the problem. I can vary the position of a

Thanks Harvey. If you're ever doing something with one of your 468 scopes, please take a look at the User Manual Page 76. I have done a lot of work on decoding the Tektronix 468 V2 firmware and posted

Hi all, Yesterday I picked up a Tektronix TDS2002C that Dennis Tillman (He says "HI" to everyone) got for me on his last trip down to Rickreall Oregon. After having a challenge with upgrading the

https://w140.com/tekwiki/wiki/1L60

Hi , in the very distant past I have seen a 1L5 , 1L10 , 1L20 and 1L40 but never heard of a 1L60 ? Brian (UK).

How many of these were ever made? I have a hankeing to complete my 1LXX collection but I have never seen a 40 or 60, like ever. For some reason I have a 119-0096-00 mixer for a 1L40 but that's it.

Sam many thanks, never used the Craig or Sweetwater cleaners, have old Miller Stephensen and GC , also use 99% ISO ALC. Never had any issues . Problems here are deeper .... access to the MOD pot for

(EDITED) Hello all, working on four 7A24, similar question for 7A26... The CH1/CH2 variable knob controls an elegant multipurpose mechanical A Push/push on the knob toggles VAR/CAL, red VAR OUT, black

Hello Kon, I would clean/lubricate the pots only with DeOxit F5 fader lube: https://www.sweetwater.com/store/manufacturer/CAIG_Laboratories Don't use the Caig D5 contact cleaner product for pots as it

Well, COVID has died down, the border is now open, the weather is nice, and we have TONS of accumulated goodies to put out for an in-person Stuff Day here at Sphere (West Kelowna, BC, Canada). We will

There is a 400V 4A Version. ? I have used these both successfully.? Mouser has these in the USA. KBL04-E4/51 (

My recollection is the holes in the circuit board are a tight fit on the 2A bridge, so if you try to use a 6A bridge, be prepared to have trouble mounting it. -Chuck Harris

sometimes the bulk caps had a bit too much ripple causing a Tant to short which takes out the rectifier. find the bad tant...... I have not yet had to change the rectifier.....I changed the Bulk caps