开云体育

One more possibility for the failures in the 2465x scopes.? The inrush thermistors are effective only when they are cold.? Turning off and immediately back on means there will be inrush current.?

Gentlemen Thank you all so much. I have learnt so much stuff about a subject about which I knew almost nothing. Important points: SMPS does not have inductive kick, therefore a capacitor across the

No idea about FET temperature, as I have no way to measure temperatures yet ! A thermocouple for my DMM and a simple IR "gun" are on my list of things to buy, but the thing is sooooo long, no idea

Ed makes a good point on AC power push-push switches. When they become sluggish it is a problem. Replace them if possible. Cleaning with IPA may help but may just contaminate the PCB. One thing that

Hi Vincent, I will wait for the proper parts, but after the test of the transformer I wanted some confirmation I was on the right track. Question: do you have an idea of the temperature of the FET in

Hi Leo, Glad the scope is back to life, however as you noticed... trying to use salvaged parts that don't quite fit the bill, is a waste of your time as the scope only half works... overheating as you

Hi Bert, Vincent and others, The ringing test made sense to me, its is relying on the fact a

I have watched this thread from the beginning - lots of good points and info. Here are some observations that tie the paths of snubbing, switch arcing, and relay response, and may indicate the true

And the DM44 mod kit says B050102-up so it should be OK. Obviously the correct info is missing in the RPR. /H?kan

So far as I know, I don't need any. The post was mostly for Tam's benefit. I'm a severe technogeek who has been obsessed with all the things there are to be done and all ways there are to do them

Hi Jim, Feel free to send me the pictures (PM to fabio.tr3visan@...). I will be glad to post it to the photos area of Tekscopes.io, and reply to you with a link to the folder. Rgrds, Fabio

As did working with a 10 Henry choke back 25+ years ago for me.? Transistors kept dying when I switched off the power, and when I had my finger on the wrong spot, I instantly knew why!? Zap, a

Hakan, this 464 is sn#B145646 it has the latest dash number -16 A6 inter board and the 3324-01 board is correct. I took some pictures of it but I am not using a photo posting svc. at this time so can

The IC controlled Trigger board as well as other improvements was introduced at SN B200000. The Service manuals 464 / 070-4795-00 and 466 / 070-4796-00 are for B020000 and up. Before that SN the

Fabio I have the pictures but I'm not using any kind of photo posting service it's gotten to complicated and I don't post much to forums anyway so can I send them to you and you can post them up? Jim

Reginald, I can make some knobs in castable resin with my SLA printer if someone wants to make some molds. Mike kd5rjz pulaskite@...> wrote:

Actual URL please???? Kevin

If the previous link didn't work - try this one. <https://web.archive.org/web/20170824191450/http://www.reprise.com:80/host/tektronix/home/default.asp> Rolynn

Hello Jim, I owed and restored a 464 with DM44 (now given to a friend) and I don't think there are any other "optional" boards linked to the presence (or absence) of the DM44. The only optional boards