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Hi Folks I am working on a tek 455 scope. managed get the trace up. facing a trig problem. doesnt trig in auto/normal/single sweep. trig view signal ok. suspect trig ic 155-0122-00 is this ic used in

Hi Andre I'm near Oxford UK and would be very pleased to have these. Regards Craig

Tiny island near France, called Guernsey. www.cwgsy.net/private/mandoline "Error 008472. Horrible bug encountered. $Deity knows what happened." Where on planet earth are you? Craig

Hey Barry, Ive added two pics from my 465 to your album, the Slit needs to align in to the PCB. /g/TekScopes/album?id=64907 hope it helps, regards Rajesh

Just bought a Tek 555 scope with cart and power supply. The scope appeared to have been used until replaced by a couple of 4xx series scopes but just shunted aside when replaced. I owned and used a

Hi everyone, Please keep in mind that this DMM has been available since the very beginning of the eighties, if not late seventies. It has been designed about ten or less years after man walked on

Bruce The list doesn't accept attachments. You will have to upload it to the photos section or host it somewhere and then post a link Dave manuals@... -- Dave Manuals@...

Hi Barry, a few weeks ago I had to do the same (horrible) job of replacing the power supply caps in my 475A, same construction. And I also wondered why Tek used such a "distance" holder for the PCB to

Fellow Tekkies, I picked up a 7L14 from an estate sale this last weekend. One of the things which struck me is the bizarre serial number the thing has -- See the attached photo. My best guess is --

Hi Russ: You have a very valid point concerning corrosion due to batteries leaking.? It is probably a matter of economics that makes the manufacturer continue to provide super thin casings.? Also,

Because the batteries don't cost $20,000 each. They're made (for primary cells) as throwaways. For secondary cells, it's the cost. They've all been laid off because they are too old, those that did

Half a century after men walked on the moon, can anyone please explain why batteries still leak? Or why engineers capable of designing incredible electronics can't at least protect the circuits from

You can certainly trickle charge some NiMH cells depending on the mfgr. I’ve used Panasonic cells that have a trickle charge spec. The trick is that the trickle charge level can’t generate more

A few months ago, I removed the trigger board from my 465B to work on the power supply caps. I started reassembling it and was left with a small nylon(?) block with a hex nut holder and a small slot

Hello Fabio, I think it had more to do with the sucker than me as it is quite hot so the solder melts quickly so it sucks up easy and out of the hole around the pin too. On wiggling the cap while

Hello Jim, I`m glad I was helpful. On your comments about taking out the big capacitors, I can't be more glad that you didn't have problems. you're either very lucky, or very, very good with the

Here is a list of the GaAs logic ICs used in the mux and demux modules. There are 12 pieces in each. I have found data sheets for a few, as shown, and a little descriptive stuff, and made some guesses

Hi John, There are a few things you could do before opening the cabinet. It's possible that the scope is working normally but showing no trace because of a fault in the (un)blanking circuitry. You

Thanks Fabio for the reply. I opened my PDF copy of the 464 manual and found the +15 volt end of the wire on the TRIG-VIEW switch but didn't know where it went from there. Did some careful perusing of

For the purposes of harmonic generation NLTLs have much lower PN than SRDs. Bruce