I had one of these magnificent scopes when I was in my late teens / early twenties, purchased from Rockwell International. Its bandwidth won't impress people today, but as an analog and moderate speed digital guy, it met all my needs and wants handily. TRIGGERING: It triggers as good as the best modern scopes today. The Dual Beam architecture was key to the most beautiful delayed sweep functionality where the top trace could show some complex waveform and the bottom trace would show a zoomed-in view of interest, where the top trace highlighted the portion of the trace that was expanded on the bottom trace - flawlessly and with vacuum tubes! like most of the cars I have owned, I should have kept that scope.
I think the CRT is similar to a 5SP2. It would be very unusual for both heaters to be open ( unless loss of vacuum ). They can withstand significant overvoltage for a while. It is not uncommon to run the heaters at 9-10V for a couple hours during manufacture. I would look at the heater pins of the CRT as those connections may fail, and can often be repaired on CRTs that have hollow pins.
Cool unit. I'll check on what I kave for vintage gear, but I think I only have a tripple 5 or a 565 left. The short power lead was for setting it up on a cart where 2 feet was plenty. If you want a modern cart, look up cheap welder carts. They might be just right. If you get a dead fan motor take it to an appliance shop, some fridge or microwave fan motors will work. If the fan doesn't fit you can find one of them too. Good luck. Thank you, keep working.
Interesting way to oil bearing. I never oiled fan bearings but i do repair/restore among other things turntables and i usually try to disassembly entire motor,clean it and then oil it. That way oil doesn't mix with dust that has been collecting there for i don't know how much years. And i am interested in video of that 585. I don't comment much but i love Tek gear so just keep it comming. :)
The filaments are open in the CRT?; there are two separate filaments for upper and lower beams at pins 1 and 14 and 3 and 13; did you check these? They are powered by two separate windings of T750 in the power supply. That would be a very strange failure to have both filaments open. I do have a good 556 CRT, but I don't think they are the same.
I remember an early Mr Carlson's Lab video that blew me away to it's size. It was as big as his chest and weight 113 lbs. From what I recall everything worked fine as Tektronix did not skimp on the components used. His fans were noisy. He also had it on a type 202-2 Tektronix oscy cart (with 1 drawer). Too bad about your T555P2 CRT. Anyone out there have a spare?
It could've been sitting for so long that you just have crud on the filaments that needs to be burned off. I've seen a tube afficionado bring a UX-245 back from the dead on a tube tester by just clicking the filament voltage switch up and down a bunch of times before settling it back on 2.5V, so maybe you could do something similar with the 555 CRT? I mean, if you're sure it's dead, then what've you got to lose?
Check your email! I just ( 12 October ) sent you a link to a 555 CRT for sale, and a second email with documentation on the different variations of the CRT.
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
I had one of these magnificent scopes when I was in my late teens / early twenties, purchased from Rockwell International. Its bandwidth won't impress people today, but as an analog and moderate speed digital guy, it met all my needs and wants handily.
TRIGGERING: It triggers as good as the best modern scopes today. The Dual Beam architecture was key to the most beautiful delayed sweep functionality where the top trace could show some complex waveform and the bottom trace would show a zoomed-in view of interest, where the top trace highlighted the portion of the trace that was expanded on the bottom trace - flawlessly and with vacuum tubes!
like most of the cars I have owned, I should have kept that scope.
I think the CRT is similar to a 5SP2. It would be very unusual for both heaters to be open ( unless loss of vacuum ). They can withstand significant overvoltage for a while. It is not uncommon to run the heaters at 9-10V for a couple hours during manufacture. I would look at the heater pins of the CRT as those connections may fail, and can often be repaired on CRTs that have hollow pins.
Cool unit. I'll check on what I kave for vintage gear, but I think I only have a tripple 5 or a 565 left. The short power lead was for setting it up on a cart where 2 feet was plenty. If you want a modern cart, look up cheap welder carts. They might be just right. If you get a dead fan motor take it to an appliance shop, some fridge or microwave fan motors will work. If the fan doesn't fit you can find one of them too. Good luck. Thank you, keep working.
i love anything tek. amazing equipment. sad the tube is bad.
i would love to get my hands on that
Interesting way to oil bearing. I never oiled fan bearings but i do repair/restore among other things turntables and i usually try to disassembly entire motor,clean it and then oil it. That way oil doesn't mix with dust that has been collecting there for i don't know how much years.
And i am interested in video of that 585. I don't comment much but i love Tek gear so just keep it comming. :)
The filaments are open in the CRT?; there are two separate filaments for upper and lower beams at pins 1 and 14 and 3 and 13; did you check these? They are powered by two separate windings of T750 in the power supply. That would be a very strange failure to have both filaments open. I do have a good 556 CRT, but I don't think they are the same.
The 556 CRT is quite different and won’t work. However, I do have a couple 556’s and would really like to buy your CRT as a spare.
After checking Datasheets, the 5SP2, while similar would NOT be interchangable with the T555 due to many physical and electrical differences.
I remember an early Mr Carlson's Lab video that blew me away to it's size. It was as big as his chest and weight 113 lbs.
From what I recall everything worked fine as Tektronix did not skimp on the components used. His fans were noisy. He
also had it on a type 202-2 Tektronix oscy cart (with 1 drawer). Too bad about your T555P2 CRT. Anyone out there have
a spare?
What oil do you recommend for the oillite bearings? Shame about the CRT. :-(
I use Amsoil gun oil with a little HBN mixed in.
Check with Vintage Tek museum in Beaverton. They know people that have stashes of parts not on the open market.
Oh what a pity. BTW with type 81 plug-in adapter you can plug your W type on 585. In case you want to sell the 555 as is I’m available.
A chap that I know has one, only runs it in winter as it heats his small basement lab so fast he can hardly stand it and overworks the AC
🤣
Bob anderson may know where to get a crt !!!
Part numbers for variations of the T555 CRT
Part No Name
Phosphor
Graticule
154-0199-00 (154-199) T5550-2 (T555 P2)
P2 (standard)
external
154-0219-00 (154-219) T5550-1 (T555 P1)
P1
external
154-0220-00 (154-220) T5550-7 (T555 P7)
P7
external
154-0221-00 (154-221) T5550-11 (T555 P11)
P11
external
154-0476-00 T5550-2-1 P2 (standard) internal
154-0476-01 T5550-7-1 P7
internal
154-0476-02 T5550-11-1 P11 internal
154-0476-03 T5550-31-1 P31
internal
It could've been sitting for so long that you just have crud on the filaments that needs to be burned off. I've seen a tube afficionado bring a UX-245 back from the dead on a tube tester by just clicking the filament voltage switch up and down a bunch of times before settling it back on 2.5V, so maybe you could do something similar with the 555 CRT? I mean, if you're sure it's dead, then what've you got to lose?
You are doing the lords work!
I have 535 tube.you can have if it helps. But I live in Europe and don’t ‘know if the tube is still good
I considered these for the nice sharp trace but they are just too big and heavy and hot runnign
Judging by the size, I think I am fine with my 7844 😅
show the 585
Check your email! I just ( 12 October ) sent you a link to a 555 CRT for sale, and a second email with documentation on the different variations of the CRT.