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Tek 284 Pulse Gen
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Dave I will shoot you some information off list.
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Zen -----Original Message-----
From: [email protected] <[email protected]> On Behalf Of DaveH52 Sent: Sunday, April 24, 2022 1:11 PM To: [email protected] Subject: [TekScopes] Tek 284 Pulse Gen I've recently acquired a 284 that seems to need some TLC. Before I start snooping around in it, I'm wondering if there are any "usual suspects" that I should consider. Besides all the electrolytic capacitors. They're already on my hit list. Thanks - Dave |
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I don¡¯t want to spam the list, But I will put it out there since it has been a while. I have video content up on you tube specializing in restoration repair and alignment of test equipment in general however it is mostly Tektronix replated content. I am the owner of the "Zenwizard Studios" YouTube channel. I have also added links to the videos on the Tekwiki under the specific pages as well. In channel related news I am always looking for project units to put in front of the lens so If any one has anything they are willing to parts ways with let me know I am always interested. I have a moderately specified calibration lab at my disposal, though it is a bit noisy.
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In terms of the 284 I am working on getting some high frequency couplers and cables in to the lab because I need to do an alignment video on the 284. But here is the info: The only REALLY critical part in the unit is D180. If that is bad you will need a parts doner. I have tried some of the Russian TD¡¯s in place and it is true they will pulse I have not yet achieved the rise time of the speced part. I have found a company that will made replacements D180¡¯s however they were special order LONG wait time and $250.00 US Each. The air line is a VERY strange beast and there are some faults in there that I get in to in the videos ¡°drifty resisters¡±. But the physical working space is quite tight. Especially with the funky back termination resister assembly. I do not have ANY of the required gear to align the unit in the lab however I have easer to use and more modern equivalents. DSA602A and an 11801C with a 12Ghz plugin and a good frequency counter. I need to 3.5mm to SMA converters as well as a GR->SMA to get the video going. So the alignment should be a LOT easer than the documentation. It calls for 500 series era instruments. Channel Link - 284 specific content including D180 testing If I can be of assistance, please let me know Zen -----Original Message-----
From: [email protected] <[email protected]> On Behalf Of JRN Sent: Sunday, April 24, 2022 1:34 PM To: [email protected] Subject: Re: [TekScopes] Tek 284 Pulse Gen Zen, can you please post the info here, so that everyone can benefit? Thank you very much. |
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Thanks,
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More is on the way. Zen -----Original Message-----
From: [email protected] <[email protected]> On Behalf Of JRN Sent: Sunday, April 24, 2022 2:46 PM To: [email protected] Subject: Re: [TekScopes] Tek 284 Pulse Gen Zen, I like your videos and I think you do it well. |
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Hey, Zen, if you want to buy new 3.5 mm to SMA adaptors, check out Mini-Circuits.? A couple years ago I needed some for work and found the M-C ones about a third the price of rip-off Pasternack.? $60 apiece vs. $180, IIRC, for similar specs.? Can't help you with GR adaptors, though.? Good luck!Jim FordSent from my T-Mobile 4G LTE Device
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-------- Original message --------From: Zentronics42@... Date: 4/24/22 11:14 AM (GMT-08:00) To: [email protected] Subject: Re: [TekScopes] Tek 284 Pulse Gen I don¡¯t want to spam the list, But I will put it out there since it has been a while. I have video content up on you tube specializing in restoration repair and alignment of test equipment in general however it is mostly Tektronix replated content. I am the owner of the "Zenwizard Studios" YouTube channel.? I have also added links to the videos on the Tekwiki under the specific pages as well. In channel related news I am always looking for project units to put in front of the lens so If any one has anything they are willing to parts ways with let me know I am always interested. I have a moderately specified calibration lab at my disposal, though it is a bit noisy. In terms of the 284 I am working on getting some high frequency couplers and cables in to the lab because I need to do an alignment video on the 284. But here is the info:The only REALLY critical part in the unit is D180. If that is bad you will need a parts doner. I have tried some of the Russian TD¡¯s in place and it is true they will pulse I have not yet achieved the rise time of the speced part. I have found a company that will made replacements D180¡¯s however they were special order LONG wait time and $250.00 US Each. The air line is a VERY strange beast and there are some faults in there that I get in to in the videos ¡°drifty resisters¡±. But the physical working space is quite tight. Especially with the funky back termination resister assembly. I do not have ANY of the required gear to align the unit in the lab however I have easer to use and more modern equivalents. DSA602A and an 11801C with a 12Ghz plugin and a good frequency counter. I need to 3.5mm to SMA converters as well as a GR->SMA to get the video going. So the alignment should be a LOT easer than the documentation. It calls for 500 series era instruments. Channel Link - specific content including D180 testing I can be of assistance, please let me knowZen-----Original Message-----From: [email protected] <[email protected]> On Behalf Of JRNSent: Sunday, April 24, 2022 1:34 PMTo: TekScopes@...: Re: [TekScopes] Tek 284 Pulse GenZen,can you please post the info here, so that everyone can benefit?Thank you very much.
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I second Jim's recommendation. In addition to better pricing, Mini-Circuits just has nicer folks. Pasternack once actually made one of my former admins weep. She had never been so mistreated by a vendor. I've not bought from them in 25 years as a result.
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Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 350 Jane Stanford Way Stanford University Stanford, CA 94305-4070 On 4/24/2022 12:19, Jim Ford wrote:
Hey, Zen, if you want to buy new 3.5 mm to SMA adaptors, check out Mini-Circuits.? A couple years ago I needed some for work and found the M-C ones about a third the price of rip-off Pasternack.? $60 apiece vs. $180, IIRC, for similar specs.? Can't help you with GR adaptors, though.? Good luck!Jim FordSent from my T-Mobile 4G LTE Device |
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I will check them out. I have a mini circuits DC block for the spectrum analyzer that is really nice. Was reasonable priced, As reasonably priced as a DC block well in to the Ghz can be. If that is the case I might be able to sneak it in with the 7510 meter cal this week.
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Zen -----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Tom Lee Sent: Sunday, April 24, 2022 3:26 PM To: [email protected] Subject: Re: [TekScopes] Tek 284 Pulse Gen I second Jim's recommendation. In addition to better pricing, Mini-Circuits just has nicer folks. Pasternack once actually made one of my former admins weep. She had never been so mistreated by a vendor. I've not bought from them in 25 years as a result. Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 350 Jane Stanford Way Stanford University Stanford, CA 94305-4070 On 4/24/2022 12:19, Jim Ford wrote: Hey, Zen, if you want to buy new 3.5 mm to SMA adaptors, check out |
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And in the era of paper, much better catalogs.? Pasternack's always seemed to be so cheap in quality.? Hardly any info/data.? We used them as an alternate source of last resort.
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-Dave On Sunday, April 24, 2022, 12:25:55 PM PDT, Tom Lee <tomlee@...> wrote:
I second Jim's recommendation. In addition to better pricing, Mini-Circuits just has nicer folks. Pasternack once actually made one of my former admins weep. She had never been so mistreated by a vendor. I've not bought from them in 25 years as a result. Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 350 Jane Stanford Way Stanford University Stanford, CA 94305-4070 On 4/24/2022 12:19, Jim Ford wrote: Hey, Zen, if you want to buy new 3.5 mm to SMA adaptors, check out Mini-Circuits.? A couple years ago I needed some for work and found the M-C ones about a third the price of rip-off Pasternack.? $60 apiece vs. $180, IIRC, for similar specs.? Can't help you with GR adaptors, though.? Good luck!Jim FordSent from my T-Mobile 4G LTE Device |
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This is all well timed and awesome information. I was looking at the Pasternack gear because that is what was popping up in searches. Fortunately no money has changed hands yet. Ill be speaking with mini-circuits on the early side of next week.
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Zen -----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Dave Seiter Sent: Sunday, April 24, 2022 7:22 PM To: [email protected] Subject: Re: [TekScopes] Tek 284 Pulse Gen And in the era of paper, much better catalogs. Pasternack's always seemed to be so cheap in quality. Hardly any info/data. We used them as an alternate source of last resort. -Dave On Sunday, April 24, 2022, 12:25:55 PM PDT, Tom Lee <tomlee@...> wrote: I second Jim's recommendation. In addition to better pricing, Mini-Circuits just has nicer folks. Pasternack once actually made one of my former admins weep. She had never been so mistreated by a vendor. I've not bought from them in 25 years as a result. Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 350 Jane Stanford Way Stanford University Stanford, CA 94305-4070 On 4/24/2022 12:19, Jim Ford wrote: Hey, Zen, if you want to buy new 3.5 mm to SMA adaptors, check out |
DaveH52
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