Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
Search
Manual for 134 probe amplifier
|
I don't know what you mean, Nick. AFAIK all 134 production used an external plug-in transformer. Are you saying that late ones had a coaxial jack and used the abundant popular style of wall transformer instead of Tek's weird proprietary one?
Manuals. I have scans of 070-0524-00 printed April 1966 with changes through S/N 6810 January 1968, and 070-0990-00 for S/N 6620 and up printed March 1969 with changes through October 1969. Both show the amp trailing its proprietary power cord that plugs into Tek's wall transformer. Both manuals are available for free download at . Dave Wise ________________________________ From: [email protected] <[email protected]> on behalf of Nick <nfeakes@...> Sent: Wednesday, April 24, 2024 2:24 PM To: [email protected] <[email protected]> Subject: [TekScopes] Manual for 134 probe amplifier Did Tek produce an updated manual for the later version of the 134 probe amplifier that uses a wall wart? If so, what is its serial number please Nick |
|
On Wed, Apr 24, 2024 at 04:24 PM, Nick wrote:
Did Tek produce an updated manual for the later version of the 134 probe amplifier that uses a wall wart?Tek probably issued a later manual that covered the wall wart version, but I don't think there would be any difference other than the wall wart itself. All you need for a power supply is something that will provide 18-22 VDC, in the proper polarity. The 134 contains a TO-66 pass transistor which regulates the DC down to ~14.5 V. The 134 draws under 100 mA. The wall wart output voltage can be higher, but that means more power dissipation in that TO-66 transistor. I've looked for nice compact DC wall warts in this voltage range, for this purpose, and come up empty. Laptop power supplies tend to be 19 VDC, but at several amps. They are readily available on ebay and would work just fine, but they are big and the overkill is annoying. I'm sure Tek had theirs custom made just for them. If you find a source for 18-22 VDC wall warts, I'd love to hear about it. -- Jim Adney Madison, WI USA |
|
surplus and cheap 19 volt laptop bricks.
toggle quoted message
Show quoted text
Harvey On 4/25/2024 10:44 AM, Jim Adney wrote:
On Wed, Apr 24, 2024 at 04:24 PM, Nick wrote:Did Tek produce an updated manual for the later version of the 134 probe amplifier that uses a wall wart?Tek probably issued a later manual that covered the wall wart version, but I don't think there would be any difference other than the wall wart itself. All you need for a power supply is something that will provide 18-22 VDC, in the proper polarity. The 134 contains a TO-66 pass transistor which regulates the DC down to ~14.5 V. The 134 draws under 100 mA. The wall wart output voltage can be higher, but that means more power dissipation in that TO-66 transistor. |
|
How professional is the construction around the power inlet? Could one make a case that your instrument was modified by a previous owner?
Dave Wise ________________________________ From: [email protected] <[email protected]> on behalf of Harvey White <madyn@...> Sent: Thursday, April 25, 2024 9:46 AM To: [email protected] <[email protected]> Subject: Re: [TekScopes] Manual for 134 probe amplifier surplus and cheap 19 volt laptop bricks. Harvey On 4/25/2024 10:44 AM, Jim Adney wrote: On Wed, Apr 24, 2024 at 04:24 PM, Nick wrote:Did Tek produce an updated manual for the later version of the 134 probe amplifier that uses a wall wart?Tek probably issued a later manual that covered the wall wart version, but I don't think there would be any difference other than the wall wart itself. All you need for a power supply is something that will provide 18-22 VDC, in the proper polarity. The 134 contains a TO-66 pass transistor which regulates the DC down to ~14.5 V. The 134 draws under 100 mA. The wall wart output voltage can be higher, but that means more power dissipation in that TO-66 transistor. |
|
On Fri, Apr 26, 2024 at 04:35 PM, Nick wrote:
I have added a picture of the connector that is on my 134 amplifier.Here's the link: /g/TekScopes/photo/294658/3775702 That's a pretty odd connector, but it's probably what Tek had to do, to make this work. I looked into adding a normal barrel receptacle to a 134 and found that there really isn't room inside for one. Still, cable end barrel receptacles exist, but it looks like Tek opted for something less common. Have you found a mate for it? -- Jim Adney Madison, WI USA |
|
That's a member of the class I've heard called bullet connectors. They're common in aftermarket automotive electrical accessories. I'm still skeptical that Tek did this.
Dave Wise ________________________________ From: [email protected] <[email protected]> on behalf of Jim Adney <jadney@...> Sent: Saturday, April 27, 2024 5:08 AM To: [email protected] <[email protected]> Subject: Re: [TekScopes] Manual for 134 probe amplifier On Fri, Apr 26, 2024 at 04:35 PM, Nick wrote: I have added a picture of the connector that is on my 134 amplifier.Here's the link: /g/TekScopes/photo/294658/3775702 That's a pretty odd connector, but it's probably what Tek had to do, to make this work. I looked into adding a normal barrel receptacle to a 134 and found that there really isn't room inside for one. Still, cable end barrel receptacles exist, but it looks like Tek opted for something less common. Have you found a mate for it? -- Jim Adney Madison, WI USA |
|
Dave
I have added a picture from TekWiki showing the same connector. Not conclusive but a small piece of evidence. That made me think yo look in the Tektronix catalogue. The 1990 catalogue shows a picture of the 134 with the wall wart and that bullet connector. I will add that to the picture gallery. All I need to do now, is to find one of those connectors. Nick |
|
Automotive parts house ??
toggle quoted message
Show quoted text
Leon Robinson ?? K5JLR Political Correctness is a Political Disease. Politicians and Diapers should be changed often and for the same reasons. On Sunday, April 28, 2024 at 10:03:39 AM CDT, Nick <nfeakes@...> wrote:
Dave I have added a picture from TekWiki showing the same connector.? Not conclusive but a small piece of evidence.? That made me think yo look in the Tektronix catalogue.? The 1990 catalogue shows a picture of the 134 with the wall wart and that bullet connector.? I will add that to the picture gallery.? All I need to do now, is to find one of those connectors. Nick |
|
Well, that confirms Tek made it, for sure. Thanks, I was not aware of this late version before this conversation. You might contact the VintageTek Museum, they have a big stock of manuals.
Our own Jim Adney added that photo to TekWiki just last year. Note the serial number in the 30000's. Dave Wise ________________________________ From: [email protected] <[email protected]> on behalf of Nick <nfeakes@...> Sent: Sunday, April 28, 2024 8:03 AM To: [email protected] <[email protected]> Subject: Re: [TekScopes] Manual for 134 probe amplifier Dave I have added a picture from TekWiki showing the same connector. Not conclusive but a small piece of evidence. That made me think yo look in the Tektronix catalogue. The 1990 catalogue shows a picture of the 134 with the wall wart and that bullet connector. I will add that to the picture gallery. All I need to do now, is to find one of those connectors. Nick |
On Apr 28, 2024, at 08:03 , Nick via groups.io <nfeakes@...> wrote: A google search for "SAE connector" should give a bunch of options. As others have suggested, you may even find them locally at a hardware or auto parts store, although four-conductor is more common for trailer lights etc. Adam |
|
Thank you, Adam, I knew I was missing a critical bit. Yes, the SAE connector, that is, Society of Automotive Engineers, the same group that created our oil viscosity standards. When mechanical constraints force you to put the connector inline in the cable, it's not a bad choice.
Dave Wise ________________________________ From: [email protected] <[email protected]> on behalf of Adam R. Maxwell via groups.io <amaxwell@...> Sent: Sunday, April 28, 2024 1:58 PM To: [email protected] <[email protected]> Subject: Re: [TekScopes] Manual for 134 probe amplifier On Apr 28, 2024, at 08:03 , Nick via groups.io <nfeakes@...> wrote: A google search for "SAE connector" should give a bunch of options. As others have suggested, you may even find them locally at a hardware or auto parts store, although four-conductor is more common for trailer lights etc. Adam |
to navigate to use esc to dismiss