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Pasternack is also quite a price gouger. I have found identical components from other vendors at considerably lower prices. Why pay $75.00 for a one foot N(M) to N(M) cable with standard coax? Greg

The mechanism would be: HV supply feeding into F937 comes from the same secondary winding of the transformer as +12V. You can see the connection across C1142 in sheet <17>. A possibility is one of the

Looking at the X plate signal will give a clue to what's going on and reduce the time spent looking for the culprit. In the mode you're using, the X signal is travelling through the B trigger gen

I do have a second scope. I could give that a try. I looked at C937 yesterday, tested good with ESR meter. Not familiar with the term "EHT" but I have back cover on, the shield on the HV section is

OK, well that explains why the waveforms at TP485 & TP494 look right but the voltages were "wrong". The schematic doesn't really make that clear about how to measure that. Was under impression that

Do you have second scope? if so, you can identify the nature of the problem by putting the 453 into X-Y mode with your quarter-inch "dot", then looking at the voltage on the X plates with the second

On Thu, Apr 21, 2022 at 06:41 PM, Ozan wrote: > > On Tue, Apr 5, 2022 at 07:18 AM, diyguitarist wrote: > > > I did notice that if I put the Horizontal > > Display switch between DELAYED SWEEP (B) and

For what it’s worth, the Fluke 540B AC-DC Thermal Transfer Standard originally used a mercury cell. In 1993, a mod was published for Lithium plus a 317 regulator. They could get away with this

Thanks for doing that. I looked at that whole area and I didn't find any bad components. I have also suspected that maybe C485 (3.3uF) was bad. It tests as open with ESR meter and ha a very funny

Hi Greg, Yes, unfortunately the ER1400 is rather difficult to deal with outside the chassis or without the GPIB option. Programmers to read and write it were far and few between, and virtually

Luca, Since R1071 is burning, C1071 is bad. This is one of those RIFAs that needs to be changed out with new. This type can be 630V type film. The two that need to be an X1 or X2 type are C1016 and

1. Those voltages are correct if you measure when the sweep is trigggered. They revert to the schematic values with a free-runing trace. 2. On my 453 (c 1970) the ripple & noise on the +12V and -12V

Due to start-up circuit and loopbacks, difficult to debug Use isolation transformers on mains, following PSU flowchart Check the power transistors, rectifiers Any blown up power semiconductor will

Hi Tek Group, I have a Tek 2465 that has power supply issues. I have followed the instructions from the Tek Service Manual, and found that the INVERTER DRIVE portion of the inverter board is

Pat; it would be helpful if you could identify which version of the 453 you have. Then, measure & post some DC voltages thro the X amp with the shift control centred. I have spares for these scopes.

I hope not, because if it does it is only visible to those who read the group via email. Those of us who only use the Web interface can never see it. Yes please. EJP

This is all well timed and awesome information. I was looking at the Pasternack gear because that is what was popping up in searches. Fortunately no money has changed hands yet. Ill be speaking with

Hi, You might want to cull your links a bit, a lot of that extra stuff is tracking information, and the links don't seem to work anyway.... I would suggest to uninstall whatever is causing that, it

And in the era of paper, much better catalogs.? Pasternack's always seemed to be so cheap in quality.? Hardly any info/data.? We used them as an alternate source of last resort. -Dave

Greetings, I have the following Tektronix PAPER manuals that are surplus to my needs. Models: 1a1,7a16p,1a2,7a18,7a26,7b53a,7b80 7b85,j16,c30a,c50,51,52,c59a,c70 134,176,tm501,am503,520a,535a,576