Custom made power cord for the Type 547 salvaged from an older style extension cord with the "slim" female receptacle. Even that receptacle required trimming of that top tab. But it fits well and tight.
TEA content is back, life is good
Did just that the other day. 99% of these scopes do not come with their american power cable.... ouf ot nearly 20 scopes, only one came with a cable... had the "square" looking plug you show, but most of my scopes have a round socket. At first I thought bugger, I need another type of cable, grr... but out of the blue, I though hey, the 3 pins look like the same shape and layout, let's try to shove the sqaure plug inot that round hole... OH ! Fits just fine ! Not loose not tight, just fine !
Who said you can not shove a square peg into a round hole !!!
But it's a pain to be so short on cables, so I am thinking of replacing the original socket with a standard IEC socket. One of my scopes has already been converted this way by its previous owner.
Depending on how I feel I may attempt a power up this coming week. But I have to study the manual first. My initial assumption that the power distribution would be similar to the Type 535A is totally incorrect. So I have to determine what test points are available to perform some resistance checks. And then monitor the all important -150V reference during power up. If that doesn't work nothing will work.
I used to have good luck powering up these scope straight out of the box, but when I got a type 549 a year ago, I was greeted with an entertaining though brief mixture of loud bangs, pops, flashes of light, blue sparks, smoke, in a beautiful choreography. I don't know if the scope survived, probably not. Does not power up anymore at the least.
Looks like my luck has gone away, so now I think I will take precautions when I get round to working / restoring my collection of these scopes... at the very least check for shorts like you mention, but I am now paranoid so I think I will also hunt for used beefy variac to hook them to ! A big one for sure... IIRC a main frame 500 is around 500 Watts or so, not counting the monster 555 of course, just a "regular" 500 main frame. So I guess I must aim at a 750VA variac or something, to be on the safe side.
I do have a dim bulb tester but would need to put several 100Watts bulbs in parallel to cope with Tek scope... not very practical, and you can't buy these bulbs anymore any way... maybe replace the bulb with a powerful halogen bulb. Still available for sale, available in high wattage, and much more compact than light bulb. Still, a variac would be good to bring the voltage up slowly as desired, to get more control. Dim bulb tester is more of an on/off safety. Saves your bacon but gives you no fine control.
Anyway, looking forward to some interesting content with your 547, have fun and keep us posted !