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I'm mostly curious how you determined if the wound coil was good without installing it inside the scope.

Or support for board? Den tors 9 aug. 2018 18:40Jeff Urban <JURB6006@...> skrev:

The focus control perhaps ??? Maybe that's where I saw one.

Fine and good but watch what you plug in together. ALot of iron can be dangerous. At first glance you think OK, inductors in parallel so less kick but that is not so. That means the total current

I've been loosely following this topic with some interest. From a simple wear perspective, I use an external power switch for my equipment because of the older equipment I own and the difficulty of

I have the parts to build a winding machine if necessary. What did the test jig look like?

Morris?Can you get the info on wire size and turns required to rewind transform from your friend that did them , was thinking of trying to rewind my 547 and 556 in case my 556 hv went down , thanks .

Jeff, the meaning of a suffix after the model name and of the Options is given in the catalogs. For instance, catalog 1987 says a 2465A CT is a 2465A with Option 9 (GPIB) and Option 10

From bitter experience I can confirm that both HV transformers in the 556 are prone to the thermal runway problem that has been discussed here ad nauseam with regard to the 547 and some other scopes.

Possibly counter timer?

OK specifics first. 561A - what is MOD 210E 2465 - what does the CT suffix mean ? I also would like some info, maybe better opinions on the different phosphor options. Someone could give me a link to

Michael, back in high school radio class our crystal radios weren't that sophisticated you had a chunk of crystal a BASIC AM receiver and a cats whisker wire to scratch the crystal till you picked up

I would think that Tektronix would have used 'bed of nails' test fixtures to test blank circuit boards before stuffing them. That would cull open or high resistance vias. As far as using the silicone

Here is the Type 59 Instrument Reference Book. http://w140.com/tekwiki/images/d/da/Tek_type_59_irb.pdf

Okay I managed to get my hands on a tube tester, and it looks like V1300 is dead. There's a very good chance that V1300 just simply gave out at high current... but I really want to rule out a short

Wow Jim, Scratch crystal tuning is awesome! Never thought this was something doable. 10 words per minute morse code seems quite impressive (to me at least, but I've never been much into Ham and less

On Tue, Aug 7, 2018 at 08:33 PM, Harvey White wrote: > > On Tue, 07 Aug 2018 17:59:49 -0700, you wrote: > > >I saw a youtube video on how to calibrate an oscilloscope and the person is > using a

at the time those instructions were printed, digital AFG and the like did not exist, so they were not included. However: 1) the PG506 (amongst others) has the appropriate 1/2/5 sequence that the

I have some in the 466 & 475 scopes I have it is a bushing for one of the control shafts in the front panel inserts from the back and held in by the switch or pot. Jim O

Looks like a bushing. Joe