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Oh, no smell of ozone either Jon. The trafo runs at 51 degrees, the caps at 31, this relative to a room temp of 20C, all limited by DIY equipment...

Jon, Ed, Mark and everyone else, thank you so much! I had to go to work today, an "occupational hazard". Tonight I clarified a couple of things. The neon stays on for a good 30 seconds, but I need a

Hi Wolfgang, I understand. I plan to pursue those relays on my own but just wanted to ask just in case. I'm still interested in getting a few of your boards as I have two 7A13s and I think the 7A12

I don't think I have one. I don't think I need one. Is this a "collector's passion" ... or am I missing something? -- Roy Thistle

Over the years I have heard that the meter scales on certain HP gear were custom ruled as part of initial calibration, so specific to the individual instrument, but I have no idea of which ones are

Hi Evan, Thanks for replying. The CSA803A has a color display. I have put some pictures of the A8 video driver board in the photo album

James: "What is the dog house hole? Is it the slot in the middle of the PSU panel where the HV lead The HV section has a metal cover (doghouse) with a 3/8" hole where HV U;tpr 21 kV connector

Hello Wofgang, Thanks for the initiative. I would also be interested in two sets of boards. I have 2 7A13's that I would like to repair. with best regards, Patrick Vandenberghe (Belgium)

Hi Barry, sorry for the confusion regarding the 148-0063-00. I didn't know the part number and just googled the part. From the pictures I found I thought it was just as simple DPDT relay (like

When I started working on mine, I found that bits of the meter scale were flaking off; so, I made an accurate photo of it. (I have a fairly good digital macrophotography setup). If the scale gets bad

Would love to have one but it would make all my other Tek stuff look bad even though I've put a lot of effort into spiffing all of them up! Tracy

Wow - I had spotted my scale is non-linear but had not appreciated that they were individual to the meter. When you say 'meter' do you mean one scale for that particular range of meters as used in

Thanks for that and filed away. Here's a link to one I did 30 years ago in Freehand on Mac a running OS 9.2.2, Did the arithmetic and just drew it, in about half a

There are several software programs for generating meter faces, paid or free. Two are: https://meterbuilder.com/mb1/custom-meter-scales.html

I have to redraw the scale for mine, it's faded beyond readability. If those scales weren't individual to the meter the redrawn scale might be of some use to others. Not happening anytime soon

Tektronix 106 Square Wave Generators for sale on eBay new surplus in Box. Preferred Air Parts have three of these left out of five. I just purchased one. If you don’t have one you need one! I will

Richard, many thanks glad I could help. Ed, fine mod, I will do the same on my 130 LC. By the way are the meter scales hand calibrated? Plan à similaire mod for à Tek 191 constant amplitude

One of my 7904s just crapped out with HV arcing inside the PS unit - very loud and obvious. I had just fixed it (it had other problems not HV) back in November, and I'm convinced the failure was due

I agree - no line filter is needed. I'd say also that no extra trim plate is needed either unless the metalwork has been messed up. I changed my 130s to IEC recently by filing out the hole periphery

James, The neon, DB1219, should stay lit for a bit of time after turning the unit off. By going off fast, that sure sounds like your main filters are bad. In these in my 7000 series, I used Nichicon