My best dumpster dive at the recycling center for years.... an almost intact Tektronix 50TU tube signal generator. I can't find a schematic for it. Not sure of age except that it pre-dates the "modular" Tektronix designs. A square-wave generator, time base generator and crystal-controlled RF source, but all integrated into one BIG box. I plan to scrap it (but if this item is valuable maybe not...)
Lots of nice knobs and switches. A bunch of selenium rectifiers that I'll toss. A big blue power tranny. And LOTS of small signal tubes, maybe a couple dozen.
How likely are the tubes any good?
Lots of nice knobs and switches. A bunch of selenium rectifiers that I'll toss. A big blue power tranny. And LOTS of small signal tubes, maybe a couple dozen.
How likely are the tubes any good?
While I'm familiar with virtually all of the old Tektronix equipment, I've never heard of a 50TU generator. Either you have a custom (never marketed) in house piece, or something extremely old, or the wrong number. Although the blue color does set a date limit. My catalogs go back to the late 50's. Can you post a picture?
As I think about it more you probably have an in house "test unit" that was never offered for the public. It may be a collectable worth some money as it is.
As I think about it more you probably have an in house "test unit" that was never offered for the public. It may be a collectable worth some money as it is.
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I too would like to see a picture.. I also have not heard of the 50TU
Signal Generator -- Very Interesting
Signal Generator -- Very Interesting
Pictures?
I suspect (like the o-scope i salvaged) it should have a bunch of those really nice ceramic "terminal strips".
I also got a bunch of aluminum "plates" with mounted tube sockets that could be repurposed for a diy electronics build chassis top.
dave
I suspect (like the o-scope i salvaged) it should have a bunch of those really nice ceramic "terminal strips".
I also got a bunch of aluminum "plates" with mounted tube sockets that could be repurposed for a diy electronics build chassis top.
dave
Wow, so cool. 😎 Definitely an in house piece. Tek and the Government are probably the only ones that ever had one. A typical giant footprint of the time. The signal generator needs a special attenuator head that feedback is taken from to assure a level output at the connector just like the Tek 190. The 5965s are better versions of the 12AU7 with slightly higher heater current. They were meant to withstand cathode interface degradation from long off periods. I'll bet they are in the time mark section.
I can see that the ceramic connection strips are the push in style verses the earlier threaded stud type. This puts the date around the late 50s to early 60s. If you reuse these, solder and unsolder quickly lest you damage the bond to the ceramic. That's why Tek used low temperature silver bearing solder.
I can see that the ceramic connection strips are the push in style verses the earlier threaded stud type. This puts the date around the late 50s to early 60s. If you reuse these, solder and unsolder quickly lest you damage the bond to the ceramic. That's why Tek used low temperature silver bearing solder.
There is a collector somewhere who might want this piece. I suspect it was used in calibrating scope time bases amongst other things. Not many would have been built. (I have seen just one that came out of a metrology lab years ago)
I agree that it seems a shame to tear down such an unusual item. I'll keep it intact if and until the urge to yank out that transformer is keeping me up at night. 😀
I'm going to see what things like it sell on e-Bay, but frankly I've already worked it out as worth a couple hundred dollars in parts if I used it that way, so I'd have to set a pretty high price.
Anyone have an idea of how much life the tubes may likely have left in them? Without a tube tester is there an easy way for me to check with an o-scope, signal generator and multimeter?
Thanks.....
I'm going to see what things like it sell on e-Bay, but frankly I've already worked it out as worth a couple hundred dollars in parts if I used it that way, so I'd have to set a pretty high price.
Anyone have an idea of how much life the tubes may likely have left in them? Without a tube tester is there an easy way for me to check with an o-scope, signal generator and multimeter?
Thanks.....
Not sure if you're in Portland, but I do wonder if the guys at Tek up in Beaverton might be able to help you out with some extra info about this very cool piece of equipment.
Before you grab for parts I would visit some of the Tektronix forums
that are online.. I think this is a rare item..
I see your serial number is in the 300's, I've never seen or heard of
one of these... So I would suspect there would be to be a desire for
this unit intact.
that are online.. I think this is a rare item..
I see your serial number is in the 300's, I've never seen or heard of
one of these... So I would suspect there would be to be a desire for
this unit intact.
I'm within a reasonable drive, usually taken so my wife and daughter can go shopping in the "big city".
I sent a photo to the "discontinued products" support e-mail at Tek. If nothing else it should give them a laugh...
From Tektronix:
Ran this by a few us old guys…. No one is familiar with that unit at all and we have no documentation.
And they provided a long list of vintage equipment sites to search.
Good company, Tek. I can think of a lot of others that would have just blown me off.
Ran this by a few us old guys…. No one is familiar with that unit at all and we have no documentation.
And they provided a long list of vintage equipment sites to search.
Good company, Tek. I can think of a lot of others that would have just blown me off.
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