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So you replaced parts who's current main failure mode is less capacitance with a part who's known normal failure modes are burns up in flames taking out the PCB or short circuit taking out the parts

Howdy all. Was trying to calibrate a DM501A this weekend. DC volts calibrated with no issues however AC volts and dBmV did not. In both cases I ran out of pot room just a tad before I had it in

On Sat, 11 Aug 2018 20:31:33 -0700, you wrote: All the lights ought to come on, then the power up sequence starts. You should hear relays clicking, and you should see different lights on the front

https://www.ebay.com/itm/132740408593?ul_noapp=true No affiliation.

A big THANX for all the effort !

On Sat, Aug 11, 2018 at 8:27 PM Thomas Dodge <tdodge2404@...> wrote: > Hi, > My name is Tom, and I haven't sent any emails in a while. I just bought a > Tektronix TDS 648A scope. I plugged it in

Only to be careful with the high voltage and the complex reassembly process. My replacement transformers were layer wound but the originals are pie (universal) wound. Chuck Harris on this group has

Took the chance to recal. the unit using better precision gear than specified in the manual. Improved the 6Mhz reference accuracy to -0.06dBm vs -0.12dBm with the R270 & R280 amplitude adjustments.

And me 108 years.? That is if my electrolyics don't leak out.

Hi y'all: Was doing some calibrations on some precision, stub tuned (+/- 0.10dBm @ 4Vpp, full range) leveling heads over the past couple of weeks for the EBAY sale listing that I put up occasionally

Lets see that would make me 107 Years Young. Sounds like you did a good job.?Leon Robinson ?? K5JLR Political Correctness is a Political Disease. To: [email protected] Sent: Saturday, August 11,

See this photo album /g/TekScopes/album?id=66462 for my recent repairs on a 2465B. This 2465B had modest corrosion on the A5 board from leaking aluminum electrolytic capacitors. On

On Sat, Aug 11, 2018 at 05:29 PM, tom jobe wrote: > > Hi Leo, > Yesterday I found the Fluke thermocouple and did some tests on a 2215A. > First I disconnected the optional fan, then let the scope run

Hi Leo, Yesterday I found the Fluke thermocouple and did some tests on a 2215A. First I disconnected the optional fan, then let the scope run with two traces like you did. The temperature of the

Thanks for the info morrios , do you have anything points that you think will help in this process ??? Things to pay attention to.? On Sat, Aug 11, 2018 at 5:22 AM, Morris

I don't currently have Instrument Reference Books for any instruments later than the early 1960s. If I find them, I will scan them and share the scans.

Are all the low voltages correct?

I have uploaded scans of the hv transformer drawings to a folder in the Photos area called (not surprisingly) "556 high voltage transformers". Good luck! Morrios

I have the Tek specification drawings for both the 556 HV transformers - I'm not sure if they're in the group files but if not I'll upload them. When I mentioned a jig, what i was referring to was a