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BINGO, Rajesh, thank you very much. With C335 disconnected as you suggested, the H trace did not change length at all over 15 minutes of operation. In fact, the test may have revealed the need for

Hello to all again Thank you for your comments and your suggestions Have rearranged the menus so they will no longer overlap each other You can read a brief corrections and some additional

I will add my thanks as well as I am sometimes in need of the correct part for a repair. Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA https://plymouthcolony.net/starcity/radios/index.html

Totally agree with Dennis - this is an invaluable resource! Many thanks for making them available. Craig

Test One conditions: Tek 549, 1A1 plug-in, CH1 @ 0.1V/CM, H timebase 0.5mS/CM; test input (CAL OUT) 1Khz sq. wave @ 0.1V peak ampl. Graphing notes: Warmup time (blue section) is not same timescale as

Hi Dave, Thank you and the members of the vintageTEK museum for putting these extremely valuable Replaceable Parts Registries (RPR) on line. When you need a hard to find part for your Tek instrument

vintageTEK sells a demonstration board which displays the wizard and Tek bug. This board has been sold out and the museum has now released an upgraded version. This new version allows the user to

Hi all, I got myself a challenge, dead DPO7k scope, which have issue with the DEMUX chip (NI ADG387C ASIC that sits between A/D chip and sampling memory). Same ASIC is used in other DPO-series

Hi William, "Necessity is the mother of invention." Plato would be proud of you. You came up with a good, practical solution. Dennis Tillman W7PF

vintageTEK has worked with Tektronix to obtain a release for the RPR. We have scanned the most popular categories of of 120- (Transformers), 154- (Vacuum Tubes, i.e. CRTs), and 155- (Tek-Made ICs).

Hi Fabio, Congratulations on getting a 7A13. Be careful! This can be expensive if you do not know when to stop. When I bought my first "additional" plugin I was delighted even if it was only a

My only problem with the site so far is that the part I want is out of stock..... -- Jeff Woolsey {{woolsey,jlw}@jlw,first.last@{gmail,jlw}}.com Nature abhors straight antennas, clean lenses, and

Hi Dave, Excellent suggestion. I have forwarded all the suggestions directly to Dinos until he figures out why he is not able t get our posts directly. Dennis Tillman W7PF

Hi, what type of battery and voltage are you going to use? Some time ago I did go as far as Installing a 2x 18650 batteries and holder inside the battery bay of my 222 and it works quite well, but I

You can confirm if C335 is causing the nonlinear trace by disconnecting it from the -150V side. and power on the scope keeping the insensitivity control CCW all the way. Once the relay clicks,wait

80% is smaller, not larger. Are you saying that the calibration is such that the calibrator is 80% of what it should be? But regardless, I have told you what to look for. Until you make some

In my case, the bloom and fade time has been a second at most, occurring after about 30-45 minutes of operation time. I keep my house cool, around 60F, so the xfrmr heating may take longer than in a

I can attest that Qservice is an excellent company to deal with.? A true asset to maintenance of Tek equipment.

The typical bloom due to a 545B's transformer failing from the epoxy disease takes a couple of minutes from start to finish. If you are displaying a couple of cycles of the calibrator square wave,

I reported that the trace shrinks in only one direction (horizontally) over time. This is not the "bloom" from HV xfrmr leakage, which affects both axes and also leads to the trace fading out, hence