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Unfortunately 6DJ8s have gotten horribly expensive because people who think they are audiophiles (but who lack the requisite theory) have been buying them up to use as audio amps, and then sometimes

Okay, then it appears that by this time Tek had given up on trying to provide the same careful spares that they used to provide. In this case, I'm glad that this is the tube that was destroyed. --

Gordon, You could have the black slick slime that is on the ceramic part of the funnel on the crt. I have seen this before. That will cause a leakage path and possibly corona. Clean the high voltage

We have no experience with 5xx Tektronix but generally suspects LV PS check all voltages HV transformers, multipliers, caps High value resistors in CRT,and HV ck Scratchy controls and switches Jon

My ancient Tektronix 547 oscilloscope with 1A1 plugin was working fine until a few weeks ago when the display suddenly went intermittent and bright, and an arcing sound came from the area of the crt

Also, note that you cannot operate this chassis out of the case for more that a very short time without external fan on the underside to keep the hybrids cool!

The Dallas NVRAM batteries have failed. Replace these, you can use the ST Micro M48Z35, drop in replacement. I strongly suggest that you completely recap the PSU, except for the large bulk mains caps,

If CRTs were recently invented and people were trying to improve them, we’d probably see faceplates with cermet bonding to the body using induction heating. We’d probably see indirectly heated

[email protected]> wrote: Here's a link to the thread: /g/TekScopes/topic/7658999.

Dennis, I have a 2432A which suddenly shows Fail codes 7000 & 9000 at startup, drilling a bit deeper: 9210,9220 & 7210,7220,7230,7240. The scope had already shown a few times CKSUM-NVRAM FAIL but then

There is a long thread on the 2712, which was previously posted. You could search the messages for "tek 2712 freezes during startup" There might be some clues there. -- Roy Thistle

Hello Matthieu: Unless there has been some Hack I am not aware of, you cannot view the Spectrum Analyzer and Oscilloscope at the same time. So, you are correct, this is reserved for the MDO4XXX

Hi, I have a Tektronix MDO3024 scope. Working great ! I would like to have on the screen the analog CH1 screen and the RF signal. Is it possible on the MDO 3000 series or it is only with the MDO

AFAIK, the 'aging' was significantly about... but not only about, stabilizing the emissivity of the cathode. Again... AFAIK... despite decades of research ... the exact mechanics of thermionic

I read Roy's posts on this tread and I did not find them offensive or aggressive. However, I do believe that the recapping discussion points have been sufficiently covered so there is no need to

Posts to this topic are now on moderation.

Roy, I've had a few complaints about your posts on this thread. If I receive more, I will need to consider banning you from the group, which I'd prefer not to do. David (Moderator).

Me too ?

Roy Your tone is highly aggressive, and I think you're just looking for a fight, for some reason which it's above my pay grade to understand. I'll debate you anytime on technical accuracy, but I

Thanks for this collection, just like a trip down memory lane. Nice to see all the Ampex manuals being saved, I kept hoping to see an ACR-25 collection. So many shops had a bookcase full of the same