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I knew probes could be used for a lot of things, but this is a new one on me: <http://www.ebay.com/itm/FLUKE-80K-15-Electronic-Air-Cleaner-Probe-/310418595539> Mark

Hello RaymondI have a power supply for tds 420A.How much do you want to spend?If you send in your faulty I may be able to repair it or sell you one for parts.Thanks Jan Koria

Fluke 80K-6 high voltage probes are inexpensive used and good to 6 kilovolts. They are designed to be used with a 10 megohm input resistance multimeter which is standard. They only have 75 megohms of

Can you be more specific?? Are you measuring voltage? If so, an ordinary Simpson 260 or Triplett 630 will do, as long as it doesn't need to be very accurate. If you need precision you can cobble up a

Is there a way to take this reading without a 3k meter?

I had a similar problem recently with Aerovox caps in my 564: one of these was defective, causing malfunction when erasing the storage screen. After some checks, the only culprit was a 0.1uF 600V

The 7503 needs work on the plug-in connectors. The side covers of the connectors need to be replaced. (This is a common failure mode and has been discussed in this forum.) I believe the scope is

fixture is sold..thanks Jerry Massengale

Hi Keith Areovox capicator has 0,9?F insteat 0,5?F, that is a typical paper-capicator-problem. i think, 1N4148 is better, but i am not sure. dirty contact, i use tuner 600 and q-tips. Best regards.

Hi Matt- Yes, thank you so much! As you said, I replaced the Aerovox cap (C335) and that particular problem is resolved! The bad cap did not show any leakage. On an ESR meter it measured much _lower_

Bought a 310A for little money, in perfect condition, optically and electrically (what a sharp trace!), lucky me. 2 Questions: It has serial number 013491, rectifier is with silicon diodes. Anybody

Hi! My TDS420A has a defective mains power supply. Would any of you have one available from a parts mule? AFAIK, PSU's in TDS420 and TDS420A are identical. True and any more models? N.B. I'm living in

Sorry, my fault. 0,5?F , (C335), that is right. Heerenveen 549 has EROmet capicator, germany capicator. But, Portland 549 has bad black areovox, replaced him and 549 run fine. Best regards Matt

================= How did Tek get the Delta Standard for the 130 L-C Meter to have a 0pF and a MINUS 3pF value? Exactly what is a negative capacitance and what is it good for? See attached photo.

Hi pleas replaced 0,33?F Areovox capicator in Horz. amplifier. This capicator ist bad. I has repaired many 549, one from Nethersland (Heerenveen) has not this Problem, but Portland-549 has this

They do not have 0 and -3pF. The fixture ( I would love to have the original, but made one myself as a substitude) has a starting capacity. I do not remember the values but for instance 3 pF on the

"Only the stray capacitance of the connector and switch assembly is in the circuit in the -3uufd position. The actual capacitance of these strays is approximately 10 to 20uufd. No effort is made to

The service manual is available online if you want to see how it works. "Only the stray capacitance of the connector and switch assembly is in the circuit in the -3pF position. The actual capacitance

Pages 6-6 and 6-7 of the 130 manual describe the cal procedure using the S-30 + and - 3pf setting. RP

Since it appears to be a passive device, it is probably and inductance that's equivalent to -3 pF at the test frequency. The zero value is probably an L-C resonant (near the test frequency) circuit