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Restoring CRT emission? 20 messages
One of my 561's has a severely double-peaking CRT and it's not that bright. Voltages are in spec. It's probably not worth locating and buying a new CRT (especially if the USPS is going to handle the p
One of my 561's has a severely double-peaking CRT and it's not that bright. Voltages are in spec. It's probably not worth locating and buying a new CRT (especially if the USPS is going to handle the p
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By Charles
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Provenance of your vintage gear 6 messages
So, I am a new member and maybe this topic been discussed before.... I recently was trying to use a 1A1 plugin in my 1956 type 531... Have some issues with it.... Reason for joining. While I was worki
So, I am a new member and maybe this topic been discussed before.... I recently was trying to use a 1A1 plugin in my 1956 type 531... Have some issues with it.... Reason for joining. While I was worki
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By Pwrelectronics
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[Tek 485] No intensity control 33 messages
Hi *, I start this new thread on the new issue seen after fixing the PSU issue from now ended topic: https://groups.io/g/TekScopes/topic/79486087 ;o) Hands back on the 485and starting from some Servic
Hi *, I start this new thread on the new issue seen after fixing the PSU issue from now ended topic: https://groups.io/g/TekScopes/topic/79486087 ;o) Hands back on the 485and starting from some Servic
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By marcosjl31@...
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Analog video animation (Not related yet interesting)
Applying special effects to video using analog circuitry, no digital processors required David Sieg - Introduction to the scanimate part 1 https://www.youtube.com/watch?v=UHjkMThH0aE
Applying special effects to video using analog circuitry, no digital processors required David Sieg - Introduction to the scanimate part 1 https://www.youtube.com/watch?v=UHjkMThH0aE
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By DW
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1S1 on ebay 9 messages
If anyone's looking for one, there's a new listing for a 1S1 sampling plug-in. https://www.ebay.com/itm/Tektronix-Type-1S1-SAMPLING-UNIT/284211115843
If anyone's looking for one, there's a new listing for a 1S1 sampling plug-in. https://www.ebay.com/itm/Tektronix-Type-1S1-SAMPLING-UNIT/284211115843
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By Charles
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3T77 tunnel diodes (again) 55 messages
Down the rabbit hole again... of unobtainium tunnel diodes, that is. I couldn't get my "new" 3T77A to trigger at all. I'm actually not sure if the 3S2/3T77A/561A combo allows internal triggering or no
Down the rabbit hole again... of unobtainium tunnel diodes, that is. I couldn't get my "new" 3T77A to trigger at all. I'm actually not sure if the 3S2/3T77A/561A combo allows internal triggering or no
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By Charles
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7M13 buttons
Just acquired a working 7M13 but the C and H buttons are broken. The 10-way button assembly doesn't have a Tek part number in the manual, it is just listed as an assembly. Is there any source for it?
Just acquired a working 7M13 but the C and H buttons are broken. The 10-way button assembly doesn't have a Tek part number in the manual, it is just listed as an assembly. Is there any source for it?
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By EJP
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To Beeswax or not to Beeswax: that is the question. 15 messages
Hi All: Yes, there are some threads about beeswax... and many more posts about beeswax, in other threads too... usually about using beeswax in/with transformers. In this tread, I want us to try to get
Hi All: Yes, there are some threads about beeswax... and many more posts about beeswax, in other threads too... usually about using beeswax in/with transformers. In this tread, I want us to try to get
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By Roy Thistle
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How to troubleshoot a faulty 7B50 timebase 7 messages
Hello All I have a 7704A with 2 x timebase: 7B53 and 7B50 The 7B50 has developed a fault suddenly and the screen is now all lighting as green and cannot see the trace anymore when using this timebase
Hello All I have a 7704A with 2 x timebase: 7B53 and 7B50 The 7B50 has developed a fault suddenly and the screen is now all lighting as green and cannot see the trace anymore when using this timebase
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By Thierry Delaitre
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Introduction and issue with a 1A1 plugin 7 messages
Hello, I've read this group off and on for several years. Finally joined. I am a BSEE of ~30yrs and have used Tek gear since technician school in the mid 80s. My first scope I owned is a 1956 type 531
Hello, I've read this group off and on for several years. Finally joined. I am a BSEE of ~30yrs and have used Tek gear since technician school in the mid 80s. My first scope I owned is a 1956 type 531
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By Pwrelectronics
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7603 horizontal performance 5 messages
I have just refurbished and calibrated my 7603. The frame itself showed 2.5ns rise time and bandwidth was 140MHz. With 7A26 system rise time is 3ns and bandwidth seems to extend to 130MHz. Small dip a
I have just refurbished and calibrated my 7603. The frame itself showed 2.5ns rise time and bandwidth was 140MHz. With 7A26 system rise time is 3ns and bandwidth seems to extend to 130MHz. Small dip a
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By Jouko Koskinen
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TDS544A with strange display 16 messages
#photo-notice
Hello gentlemen, My first post here, but I've been looking for information on this site for a long while. Some 8 years ago I bought A TDS544A with normal caps issue; that was solved (removed all old c
Hello gentlemen, My first post here, but I've been looking for information on this site for a long while. Some 8 years ago I bought A TDS544A with normal caps issue; that was solved (removed all old c
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By durechenew@...
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Thanks for the 3L5 mod info, now, about testing 561/564 frames... 9 messages
Thanks to all for the helpful sweep mod data to make the 3L5 run, it was just what I needed. Now, what I could really use is a test plug in to check the 561/564 frame and power supplies. is there such
Thanks to all for the helpful sweep mod data to make the 3L5 run, it was just what I needed. Now, what I could really use is a test plug in to check the 561/564 frame and power supplies. is there such
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By walter shawlee
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Alert for 519 owners 3 messages
While searching Ebay for a GR874 splitter tee, I came across this listing: https://www.ebay.com/itm/Lot-of-4-Tektronix-017-054-017-052-With-General-Radio-GR-874-Connectors/362763553704 I think these a
While searching Ebay for a GR874 splitter tee, I came across this listing: https://www.ebay.com/itm/Lot-of-4-Tektronix-017-054-017-052-With-General-Radio-GR-874-Connectors/362763553704 I think these a
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By Charles
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547 HV Transformer: Bill Schell rewind failed 37 messages
In 2017, my 547 with Bill Schell HV transformer (installed around 2000) was working. It has sat unused in a dry basement since then. Today, in March 2021, that transformer exhibits the same thermal ru
In 2017, my 547 with Bill Schell HV transformer (installed around 2000) was working. It has sat unused in a dry basement since then. Today, in March 2021, that transformer exhibits the same thermal ru
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By Dave Wise
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Q122/222 Jfet J300 subs for 2215A scope ? 27 messages
HI All... Got a Tektronix 2215A. Channel 1 was bad, no signal coming through. Channel 2 fine. Found Q122 Jfet on channel 1 was a J210 part # and bad... already replaced a while back perhaps? should be
HI All... Got a Tektronix 2215A. Channel 1 was bad, no signal coming through. Channel 2 fine. Found Q122 Jfet on channel 1 was a J210 part # and bad... already replaced a while back perhaps? should be
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By charlesterrebonne@...
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Sampling head extender missing coax connectors 25 messages
When I bought my 3S2 sampling plug-in, it came with a 012-0124-00 Sampling Head Extender (3 ft). Thought that was a nice bonus. Unfortunately some genius seems to have removed the push-on coax connect
When I bought my 3S2 sampling plug-in, it came with a 012-0124-00 Sampling Head Extender (3 ft). Thought that was a nice bonus. Unfortunately some genius seems to have removed the push-on coax connect
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By Charles
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TEK370A >> 370B ? 2 messages
Is it possible to upgrade a 370A to 370B by changing the firmware? (except from floppy drive) Any information welcome... thanks, Fred
Is it possible to upgrade a 370A to 370B by changing the firmware? (except from floppy drive) Any information welcome... thanks, Fred
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By 73_Fred
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Tek 2230 psu story (work in progress)
Hi! im currently fighting with a Tek 2230 that really don't want to come back from the graveyard, i'm posting this hoping that my experience may one day help someone else. So... i've got it from an au
Hi! im currently fighting with a Tek 2230 that really don't want to come back from the graveyard, i'm posting this hoping that my experience may one day help someone else. So... i've got it from an au
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By Pitpat
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465 B sweep switch cam 21 messages
Hi all, I know this is a common problem, and have seen a nice description here: https://forum.tek.com/viewtopic.php?f=568&t=138253&sid=c827508d3401e2cd90eb52f42415517a In his fix he replaced some of t
Hi all, I know this is a common problem, and have seen a nice description here: https://forum.tek.com/viewtopic.php?f=568&t=138253&sid=c827508d3401e2cd90eb52f42415517a In his fix he replaced some of t
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By Dave Peterson
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