From what I understand some of the addresses are unused. It is possible that they change randomly and so are different every time the NVRAM is read. I have used the TDS Floppy Tools also - to both

The Aid and Offset buttons are independent of the Steps Knob. You may select any number of steps (1 to 9), regardless of how the Offset controls are selected or adjusted. Even with the offset

Dear all, I bought the "functional replacement" chips of the Dallas DS1650 and DS1486 to replace the ones in my scope. I have downloaded the the TdsNvramFloppyTools and read the 1486 several times

Link replaced! Cheers

DW, The offset is adjustable by the Offset Multi knob(the big metal knob) when "AID" button is on and "Zero" button is off, when the "AID" button is off and "zero" button is off you can turn the knob

Thank you Chuck. The parts have just arrived and I will post the results after replacing the damaged parts

is that the same as the 7854 analogue test board? Is so could be interested - what is the likely price? David

Raymond, My PG506 (very early model) has a similar behaviour but it is the edge moving towards ground which is cleaner so the -ve output has a clean 'positive' edge. Roger

Absolutely! I do it with every power supply that I recap for myself, or my customers. I wouldn't dream of putting a freshly fixed power supply in an instrument without testing it first. -Chuck

OK, Thank you, I think I got it. I need to load the 5VD line with t he 2 ohm load, and the regulator outputs with 100 ohms (or whatever for 10-20 mA). Put 120V to J205/204, short J206/207, turn on the

Hi Clark, No. I have been working on something else I need much more. It will be done in 2 weeks and then I am free to start on something else. I would like to make the 7804 Conversion board but

Let's face it, right about now, EVERYBODY needs some cheering up. We have put all kinds of goodies on the Holiday Stuff Season page, HP/Agilent, Tek, Fluke and more, plus all kinds of amazing, dirt

I later realized that I should have mentioned that both the falling and rising edges were affected equally or only mentioned "edge". In my first fast edge generator (a PG506), the falling edge was a

Raymond, I interpreted your first post to mean that only the falling edge was distorted, that was the reason for thinking it couldn't be only the passive (or more accurately the linear) components at

For sure it's a weird board, but there's one more thing it does besides letting you test the lamps and control the analog portion of the scope without the processor. Item 4 in the list of "other

QService carries it.... https://www.qservice.tv/vpasp/shopexd.asp?id=86 I'm not a aware of a freebie... David

Today, a friend gave me a 224 scope, which is completely dead. Unfortunately, I did not find a service manual or schematics for the 224. Does anybody know a source? -- Best regards, Fred S.

Yes, easy to make that assumption. They also used a picture of the 465/475 HV multiplier as their "generic" photo. I suppose that is because almost anyone who has worked on a TEK Scope has seen that

If you go to the back of the 2465B manual, around about page 472, by paper page count, there is a flow chart (10), labeled: Power Supply Troubleshooting. The next page is labeled: Inverter

The 2465 family lists them as follows: 2465: 10K film, 0.5%, 1/8W 2465A: 10K, 0.5%, 0.2W, TC=T2, MFR PNO=CR8 20 DYE 10K0 2465B: 10K, 0.5%, 0.2W, TC=T2, MFR PNO=CCF501D10001D, Dale Electronics. Dale