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Welcome Kevin, I started doing engineering in 1981, test, IR detector amps, MCU and memory chips, then some power, HV, micropython more recently. Have lots of tek scopes 7844s 7904A 7603 7103 7104

Welcome, Kevin! I’m of similar vintage as you. I wouldn’t say an analog scope never lies, just that it lies less often than a DSO. Jim Ford Laguna Hills, California, USA

The 5000 series is a real “sleeper”. Low BW (my 5103N D10 tops out at 1 MHz) means low noise for audio and power supply work. Simple circuits and no ICs means easy to troubleshoot and fix. Come to

Thought I ought to introduce myself as I have a bunch of queries to resolve. I'm an electronics engineer with 35yrs experience in the RF and analogue electronics industry. I first came across

Thanks for the responses. I'm familiar with restuffing cans,? ?but a bit wary as this a line voltage cap and the new capacitor would not be able to vent in case of catastrophic failure in its new

Hello learned audience! I have looked at the archives for the above topic. Wanted to ask if the D10/D11 were the only ones that would substitute into a 577 curve tracer. I have a couple of 577 which I

Dave, X types are for across the mains and Y is from mains to ground. If there is a 1 after the letter, it is available in a higher voltage which is fine for 120V types and even better for 230-240V.

I don't know the specifics of their failure mechanisms and will take Gerrit's word on that, but their "special purpose" is to help control conducted emissions (EMI) that the instrument couples onto

I have older equipment with other less aesthetically pleasing capacitors in the same functions and they are all fine. I had the parts fail without ever having been installed. Kinda suggests it's not

Kevin, These cans I restuff with Nichicon LGR 1200mfd 200 or 250V types. I use small screws and ground lugs to mount the cans inside. Drill a hole at the bottom of where the screws go slightly smaller

Those Rifa caps in the line filter are safety caps. I was told this is generally a failure mode of safety caps. Short voltage spikes on the power line damage the caps. Safety caps are self healing.

In the groups interested in resurrection of old(er) radios, this is a common problem. One solution is to, carefuly, open the capacitor base crimp and remove the innards. Replace with suitable leaded

Hello, I have two 7904A scope frames. The first is now functioning after some power supply repairs, but the second is very sick. Eventually I have determined the trouble is that one of the 950uF 200V

The bad C95 sockets I mentioned are easily recognized by the unique profile on the short end as shown on the center picture at the bottom of the Wiki page. If you have those in your scope or TM500

By "buzzing out" I mean using a meter with either a buzzer /continuity or set to ohms to find what wire goes where. The intensity pot wiper - white/yellow stripe wire I think - goes from the front of

Mike this is exactly what I just said. <mjdrum1958@...> wrote:

New Rifa caps have the same failure mode as old Rifa caps??? I sure hope that's not true! Does anyone know for sure. Hard to imagine manufacturing steps have not been taken to eliminate that. Mike

I had to purchase this value (.1uF + 22ohm) recently for a Tek 7912AD repair, and if it helps anyone, the part number to order at Mouser is 80-PMR209MC6100M022. (Assuming you're ok with the risk of

Thanks Mark. Will contact my friend to see if he has the appropriate adapter. Gordon

Thanks Andy, but a bit puzzled by your procedure. My DMM doesn't have a continuity beeper so not sure what you mean by "buzzing out" from the intensity pot. Are we trying to determine if the