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1
Announcements / Re: Temparary Moderator wanted
« Last post by Giacosmos on Today at 05:35:47 AM »
Get the information you really feel that it is very interesting in terms of disseminating information on good tunes, then stick the web to see the primacy.
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Electronic Video Blog / Quelle est la taille de la source de ces grandes données?
« Last post by VirgilReevy on Today at 04:45:59 AM »
Quelle quantité de données puis-je obtenir, car je soupçonne que ce contenu substantiel a été supprimé de la base de données?
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Test Equipment / Re: Com Ser Laboratories tear down possible repair
« Last post by The Radio Shop on March 24, 2019, 07:42:02 AM »
Price?
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Test Equipment / Re: Com Ser Laboratories tear down possible repair
« Last post by Wheld on March 23, 2019, 05:58:46 PM »
I have a Com Ser Labs BR 1000 A with Com-Ser  CSL UD 100 updater both in working condition when stored 2 years ago.  They are for sale if anyone is interested.
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Electronic connection / Re: Discussion thread for: AC 101: Rectifiers
« Last post by kinkydoints on March 21, 2019, 09:37:12 AM »
Thanks guys for this site I am learning from doing more than I ever thought.  I have a question on older tube equipment that have been using these old selenium diode to power the DC side. both of the projects I am working on use these, I have seen the videos on " replacing " these with 1n4007 silicon diode and two electrolytic caps. Can a NTE5301 silicon bridge rectifier be used? that should take 2 caps out of play ?
  just like to update and clean up the underside just a little as far as the rats nest of wires .On these two s-120 hallicrafters radios found two rebuilding one,  the other for a baseline so I don't get lost, as it is untouched by me, the 324 eico . as far as the wave pattern on the 324 would the use of that solid state 5301 rectifier make it a better looking pattern ? the sine wave looks more like a camels back... 


                                                               Thanks from KN4SNM
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Basic beginner Electronics / Re: adding fuse to tube radios
« Last post by kinkydoints on March 20, 2019, 08:57:58 PM »
Thanks guys for this site I am learning from doing more than I ever thought.  I have a question on older tube equipment that have been using these old selenium diode to power the DC side. both of the projects I am working on use these, I have seen the videos on " replacing " these with 1n4007 silicon diode and two electrolytic caps. Can a NTE5301 silicon bridge rectifier be used? that should take 2 caps out of play ?
  just like to update and clean up the underside just a little as far as the rats nest of wires .On these two s-120 hallicrafters radios found two rebuilding one,  the other for a baseline so I don't get lost, as it is untouched by me, the 324 eico . as far as the wave pattern on the 324 would the use of that solid state 5301 rectifier make it a better looking pattern ? the sine wave looks more like a camels back... 


                                                               Thanks from KN4SNM
7
Other Electronics and repair / Re: Tek 222 Schematic
« Last post by KE4EST on March 15, 2019, 08:39:21 PM »
Why hello Gary!!! Welcome to the forum.  I have spoken to you other places, nice to see you here!
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Other Electronics and repair / Re: Tek 222 Schematic
« Last post by The Radio Shop on March 12, 2019, 09:18:33 PM »
Thanks for sharing the videos. I added the directs to the videos in your post. I really need to get the youtube links to work by user uploads.

I may have that manual. Will look this coming week end.
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Other Electronics and repair / Re: Tek 222 Schematic
« Last post by GEBevis on March 12, 2019, 05:09:00 PM »
I would also like to ask if anyone has a schematic for this Tektronix 222 scope, I would very much like a copy.
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Other Electronics and repair / Tek 222 Schematic
« Last post by GEBevis on March 12, 2019, 05:07:17 PM »
Hello Everyone, I joined the forum today and I wanted to share my most recent video repair.  I assembled a 9.4 volt AA NiMH battery pack series parallel 14 batteries, just as shown in Mr. Carlson's Lab video about his Tek 224.  I inadvertently wired the batteries reverse polarity, which let the smoke out  :-\.  I made two videos, I linked them below.

https://www.youtube.com/watch?v=FySdNS_YdAY&t=3s

https://www.youtube.com/watch?v=OhayoRRgYoc&t=1s
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