Author Topic: Tektronix 453 High Voltage Transformer  (Read 587 times)

0 Members and 1 Guest are viewing this topic.

Offline DouglasfirTopic starter

  • Newbie
  • !
  • Posts: 5
  • Country: ca
Tektronix 453 High Voltage Transformer
« on: October 26, 2024, 02:58:27 am »
Hey everyone, i'm looking for a high voltage transformer for a tektronix 453.  After troubleshooting mine appears to fairly quickly increase in current draw which blows the fuse (F937).  Does anyone happen to have one or know of a source for one?  Thanks so much!
 

Online tautech

  • Super Contributor
  • ***
  • Posts: 29813
  • Country: nz
  • Taupaki Technologies Ltd. Siglent Distributor NZ.
    • Taupaki Technologies Ltd.
Re: Tektronix 453 High Voltage Transformer
« Reply #1 on: October 26, 2024, 07:00:49 am »
Hey everyone, i'm looking for a high voltage transformer for a tektronix 453.  After troubleshooting mine appears to fairly quickly increase in current draw which blows the fuse (F937).  Does anyone happen to have one or know of a source for one?  Thanks so much!
Welcome to the forum.

Presume you mean T930 on P210 of the SM.
https://w140.com/tekwiki/images/0/01/070-0755-02.pdf

Q930 switches the primary supply and if the oscillator circuit is not working correctly the fuse F937 will protect the transformer.
You have a short time to capture any oscillation with another storage scope however presume it's not working as it should and test all componentry meets their correct values.
Avid Rabid Hobbyist.
Some stuff seen @ Siglent HQ cannot be shared.
 

Offline colorburst

  • Regular Contributor
  • *
  • Posts: 58
  • Country: us
Re: Tektronix 453 High Voltage Transformer
« Reply #2 on: October 26, 2024, 09:11:57 am »
Make sure to rule out other less serious causes before blaming the transformer. Some good starting points for troubleshooting are in Jerry Massengale's (RIP) thread: https://groups.io/g/TekScopes/topic/7643060

If you are convinced the transformer is indeed bad, the best option may be to rewind it as any OEM replacement new or used would be on borrowed time as well. Apparently it's plagued by the same epoxy issue the 547 is known for, and unlike the 547, there were no replacements made. Dave Wise has posted a detailed guide how to do it successfully with minimal tools: https://www.antiqueradios.com/forums/viewtopic.php?p=2475599#p2475599
« Last Edit: October 26, 2024, 09:29:13 am by colorburst »
 

Online squadchannel

  • Frequent Contributor
  • **
  • Posts: 423
  • Country: jp
  • deepl translate user
Re: Tektronix 453 High Voltage Transformer
« Reply #3 on: October 26, 2024, 10:30:43 am »
Why I like the old Tektronix. The information is available.
« Last Edit: October 26, 2024, 10:55:40 am by squadchannel »
 

Offline DouglasfirTopic starter

  • Newbie
  • !
  • Posts: 5
  • Country: ca
Re: Tektronix 453 High Voltage Transformer
« Reply #4 on: October 26, 2024, 05:28:49 pm »
There's no way I could ever possibly rewind this transformer.  sigh.  unless someone can do it for me and i can pay them, i guess the unit is going to the scrap heap.
 

Online factory

  • Super Contributor
  • ***
  • Posts: 3215
  • Country: gb
Re: Tektronix 453 High Voltage Transformer
« Reply #5 on: October 26, 2024, 06:58:30 pm »
Look for another 453 to pull the parts from, they seem fairly common still here, they can't all have bad transformers.

David
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf