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Craig Sawyers wrote: It's more teaching and learning than confusion. - there is chapter and verse out there Where is vertical amps concept series available? Concepts series on Probes refers to

Greg_A wrote: This is about a thread already in progress. About series connected compensation box. JG

All. adding any capacitance to the input port of scope would never, repeat never lower (never half) the total capacitance. Capacitance would be added - Cap internal + Cap added outside. What a joke.

t is true that adding a 1Meg paralleled with a 20 pF to the scope input will halve the capacitance, & double the DC resistance. Both of these results will reduce the loading on the DUT, which is the

I'm baffled by the confusion here - there is chapter and verse out there about probe/scope matching. In the archives, in downloadable Tek XYZ of scope probes, in Concepts series on Probes to name

It is true that adding a 1Meg paralleled with a 20 pF to the scope input will halve the capacitance, & double the DC resistance. Both of these results will reduce the loading on the DUT, which is the

Dale wrote: You can remove input capcitance in scope/plugin to make the input C smaller as long as you do so at the input side of the attenuators only. You may be able to knock it down by 50%. It is

Actually, this is not quite correct. The original poster was asking about stripboard, which has continous copper strips connecting the holes. To build circuits, the strips are cut with a special

The scope BW is tested with a 50 ohm source and 50 ohm cable, that's a 25 ohm equivalent source impedance. So 20pF and 25 ohms is a common upper testable BW at the BNC, the scope or plugin may have a

Although they initially have different P/N's they are functionally the same and in fact later they were both replaced by the same P/N (672-1408-03). I believe one difference might be a different type

Thanks all for the replies. Randall

The last time I checked (a few yrs ago), Digikey still sold an S-100 proto-board! For all your computer prototyping needs...

Hi, That is correct. Two red wires are connected together. I modified all my 222,222a, 222ps and 224 (cca 6 scopes): - used 7x 2700mAh NiMh cells, - put thermal switch in serial - put external

Hi group, i have harvested a TDS540 which shows aquisition board error during self test. I could get a TDS540A for low quote with a smashed CRT and i think about to swap the aqui-board if

2009/5/29 theoldtrout <angela@...>: Good job your cat didn't walk over your open PSU as the smell of burning fur is quite horrible :-) -- Steve Rooke - ZL3TUV & G8KVD & JAKDTTNW A man

Sorry about the repeat of my original post below. I was trying to write an update and one of my cats walked over my PC keyboard. Anyway, measured the PSU voltages and all except the 130V are high by

Hi Michael, Another company selling the idential stuff is Vector Electronic (http://www.vectorelect.com/)s. It is quite commonly available here in the US from at least these three parts

It is there to protect the ICs on the main board from being crushed if you hit the bottom of the case (like when you slide it off a bench). The seam of the case extended too far into the interior if

Sorry for the long post – detailed troubleshooting info follows: Here is the latest in my attempts to repair the HV section in my SC-504 Scope. The circuit is drawing excess current from the

Just an update on this. I checked the PSU voltages at the test points and all, except the 130V line, are high by about 10% which is pre-regulator voltage. I did a swap of equipment with another member