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Those manuals are a big improvement over the military manual I was using. The trigger level controls are just that. They set the point on the waveform where the triggers occur. Sensitivity is

Only the TM504, and TM506 have a high power compartment. This would be the SINGLE right-most compartment of the TM504 and TM506. The high powered compartment is not needed for the SC504. The SC504

Dennis, If vendors were consistent it would be clear. There are several datasheet drawing that have neither dooted or dashed or solid lines. Some show pin 1 left and some show pin 1 right. The point

This is a NTC surge resistor. It has a negative temperature coefficient, i.e. it is 10 ohms at 25 °C and drops as its temperature rises. This allows the capacitors to charge up when power is first

I've finally downloaded REAL Tek 457 manual. MUCH better manual. Thanks Dave. Max, I think I've fiddled with R565 to get the best sensitivity possible. That is + trigger slope cranked fully clockwise,

David, David, Max and all. The point about another "unfound" problem is likely to be the most relevant and will be the research problem for this evening. Thanks to all of you for your support to this

My TM504 is very clearly marked with a sticker that only the right most compartment is high power and the other three compartments have the switch cut-outs which disable high power.

RT901 is 10 Ohm, measures 10-15 ohm out of circuit. Shouldn't really have a hole in it tho' JC

Hi Alex, I have a good 2235 A6 board that has been removed from a scope, and RT901 measures 15 Ohms in circuit. The component has no other markings (of use) other than "10 Ohm" (where Ohm is the Ohm

Just want to correct this, the 2215A is a 60MHz scope based on the 2235, in fact you could easily reconvert this to a 2235 with the addition of a few components. It uses the same CRT and is actually

Dennis, Thank you for your comments. I appreciate your inputs. I have a TM501, TM502A and a TM504 as well as about 8 modules to go in them. The TM501 has a lighter 35 watt max supply. the TM502A has

As you probably discovered by now, there was no TM502. There was only a TM502A. All of the TM5xx mainframes are virtually identical in the most important respect - how power is provided to the

Jerry, This drawing would be clear to anyone who ever had to read a mechanical drawing or to anyone who had a mechanical drawing class in school. There are several clues in the way the drawings are

Hi everyone, I have just acquired this scope which was sold as not powering on. Once opened up I spotted that RT901 which sits on board A6 had a hole in it. I also measured it at 15ohms out of

That is what happened to mine :( I had a 3001GPX for a time, but never found the pods to buy. Gave it away to a friend (which never found the pods,anyway). I use my HP16500C a LOT, even doing reverse

"I understand some tants have a bad habit of going bad, and it sure would be nice to know their board designations and, even better, their locations." that info in the first archive group at:

Glad you found the problem. I had a 6808 go bad in a 2445 and fixed it a few weeks ago. The A8 address output line failed in a sort of open floating state. Do you have any indication of what the

If the pods include the p6460 *with* the plug-in wire grabbers, I've often seen them go for more than the 1240 analyzers themselves on ebay. And shipping from Brazil should be a lot less than the

That's great! I was really expecting you to come back and say "I put in the new processor and it doesn't work". This is the first uP failure that I have heard of in a 2465x scope. --Victor

OK, I ended up buying the panel Dan mentioned below as I could never get the screen settings to hold properly on that other panel someone recommended. I just got new panel today, and it is a 16:9