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Re: WTD: Manual for C1002 Camera
Richard W. Solomon
Well, if I don't have the manual, it's not of much use to me. I would take
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$30 for it plus a few bucks for shipping. Assuming you in the CONUS. As for the difference between the two, I have no idea. Regards, Richard S. -----Original Message-----
From: Miroslav Pokorni [mailto:mpokorni2000@...] Sent: Tuesday, January 08, 2002 5:16 AM To: TekScopes@... Subject: Re: [TekScopes] WTD: Manual for C1002 Camera I do not quite understand why do you want to sell that camera if you do not have manual, but if you persist, I might consider buying it. What is your asking price? Do you know what is difference between C1001 and C1002? I just assumed that both have 9 pin D connector for all connections, but maybe that is not so. Regards Miroslav Pokorni ----- Original Message ----- From: Richard W. Solomon To: TekScopes@... Sent: Monday, January 07, 2002 3:27 PM Subject: RE: [TekScopes] WTD: Manual for C1002 Camera I "reverse engineered" the power connector and figured out the pin-out. So far I have not gotten anywhere on getting a manual. If all else fails, I'll probably just put it up for sale and move on to something else. I got this with a lot of Tektronix scope cameras, got two C-50's left and this orphan. Regards, Richard S. -----Original Message----- From: Miroslav Pokorni [mailto:mpokorni2000@...] Sent: Monday, January 07, 2002 12:05 AM To: TekScopes@... Subject: Re: [TekScopes] WTD: Manual for C1002 Camera Hello Dick, I own two of C1001 cameras and do not have any documentation. Perhaps we can share notes. So far, I found out that camera part was made by NEC and puts out an NTSC signal. There are several adapters to mount camera to scope, probably the most useful are: 1.. 016-0248-01 for small screen 7000 series scopes (not 7600, though and 7600 is not recommended; probably image is too big) 2.. 016-0269-03 for 2400 and 'new' 400 (465) 3.. 016-0306-01 for 'old' 400 series (485, 454 etc.) I am looking for #1 adapter while #2 came with one of cameras. I am also looking for documentation and selected accessories; I do not think that original board for PC would be very useful, that might be a pre-ISA slot and even if you have the slot in your PC, drivers might be missing or incompatible with available Wander from Redmond. What I found so far is: 1.. The 9-pin connector takes in 12 V, around 300 mA at pins 1 (positive) and 3 (ground) and signal is on pins 4 (shield/ground) and 5 (video); there are two other pins used which bring in calibration voltages and go only to BNC and two test points. 2.. Someone on this forum suggested to use 'Snappy' for frame capture; that device is available on e-bay for around $10, but manufacturer seems to be out of business. I played a bit with this camera, with limited success. The Snappy has a 'monitor' mode, a quasi real time but that was not good enough to adjust focus, so I set focus to infinite and looked at the picture of nearby window; that way basic camera operation was verified. With great difficulties I managed to focus camera for oscilloscope image. Adjusting light intensity exhausted last shreds of my patience and now camera has to wait. However, the best results I got when TV receiver's video input was used, a real real-time image. I would like to find out how this camera or frame capture board were triggered to capture desired frame. I presume that was done by trailing edge of scope gate signal. Out of curiosity, how much did you pay for your camera? The first one I paid around $70 (with shipping) while second one was mine for $20 (with shipping) and I do not see the difference. The cheaper one came with scope adapter and a cable (9 pin male D connector on both ends) and is higher serial number; it is just as you would expect on e-bay, no rime. I tried this forum for more information or parts, but no luck so far. Let's hope you have better luck. Regards Miroslav Pokorni ----- Original Message ----- From: w1ksz To: TekScopes@... Sent: Wednesday, January 02, 2002 3:45 PM Subject: [TekScopes] WTD: Manual for C1002 Camera I picked up this TEK Video Camera (mounts on Scope face). Does anyone have a manual I can buy or copy ? Or have any info on this camera ? Thanks, Dick, W1KSZ Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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585 oscilloscope
morriso2002
Hi all,
I have been having a bit of fun recently restoring a 585 scope - a late model which had been modified into a de-facto 585A. This instrument is nearly 40 years old and must have really wowed them back in the 1960s when it appeared on the market. It has a distributed vertical amplifier which has no less than 15 push-pull 6DJ8s (including three in the type 82 plugin) and a response which is only about 3 dB down at 100 MHz in my particular example. The timebase performance is not quite as spectacular but with care, I have had a 200 MHz sinewave displayed on the screen. It's really a classic and beautiful machine, in which all the signal circuits, in the mainframe at least, are vacuum tube! Remarkably, there were only a couple of resistors and capacitors which needed replacement. The only tube that had failed was one 5642 HV diode in which the leads had corroded. I was lucky in that the vertical amp balance was pretty good - the manual describes a tedious and rather dangerous procedure for adjusting it which requires a good stock of 6DJ8s, and clip leads connected to the very hefty 100 and 255 volt power supplies. Even though the calibration looks reasonable (not bad either after all that time) I really need a type 84 plugin and a TU-5 pulser to do it properly. If anyone here has either or both of these which they don't need I'd be happy to give them a good home! This 585 will never be my standard bench scope, but I really want to get it into prime condition as an example of one of the great historical classics. Morris |
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Re: WTD: Manual for C1002 Camera
I do not quite understand why do you want to sell that camera if you do not have manual, but if you persist, I might consider buying it. What is your asking price?
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Show quoted text
Do you know what is difference between C1001 and C1002? I just assumed that both have 9 pin D connector for all connections, but maybe that is not so. Regards Miroslav Pokorni ----- Original Message -----
From: Richard W. Solomon To: TekScopes@... Sent: Monday, January 07, 2002 3:27 PM Subject: RE: [TekScopes] WTD: Manual for C1002 Camera I "reverse engineered" the power connector and figured out the pin-out. So far I have not gotten anywhere on getting a manual. If all else fails, I'll probably just put it up for sale and move on to something else. I got this with a lot of Tektronix scope cameras, got two C-50's left and this orphan. Regards, Richard S. -----Original Message----- From: Miroslav Pokorni [mailto:mpokorni2000@...] Sent: Monday, January 07, 2002 12:05 AM To: TekScopes@... Subject: Re: [TekScopes] WTD: Manual for C1002 Camera Hello Dick, I own two of C1001 cameras and do not have any documentation. Perhaps we can share notes. So far, I found out that camera part was made by NEC and puts out an NTSC signal. There are several adapters to mount camera to scope, probably the most useful are: 1.. 016-0248-01 for small screen 7000 series scopes (not 7600, though and 7600 is not recommended; probably image is too big) 2.. 016-0269-03 for 2400 and 'new' 400 (465) 3.. 016-0306-01 for 'old' 400 series (485, 454 etc.) I am looking for #1 adapter while #2 came with one of cameras. I am also looking for documentation and selected accessories; I do not think that original board for PC would be very useful, that might be a pre-ISA slot and even if you have the slot in your PC, drivers might be missing or incompatible with available Wander from Redmond. What I found so far is: 1.. The 9-pin connector takes in 12 V, around 300 mA at pins 1 (positive) and 3 (ground) and signal is on pins 4 (shield/ground) and 5 (video); there are two other pins used which bring in calibration voltages and go only to BNC and two test points. 2.. Someone on this forum suggested to use 'Snappy' for frame capture; that device is available on e-bay for around $10, but manufacturer seems to be out of business. I played a bit with this camera, with limited success. The Snappy has a 'monitor' mode, a quasi real time but that was not good enough to adjust focus, so I set focus to infinite and looked at the picture of nearby window; that way basic camera operation was verified. With great difficulties I managed to focus camera for oscilloscope image. Adjusting light intensity exhausted last shreds of my patience and now camera has to wait. However, the best results I got when TV receiver's video input was used, a real real-time image. I would like to find out how this camera or frame capture board were triggered to capture desired frame. I presume that was done by trailing edge of scope gate signal. Out of curiosity, how much did you pay for your camera? The first one I paid around $70 (with shipping) while second one was mine for $20 (with shipping) and I do not see the difference. The cheaper one came with scope adapter and a cable (9 pin male D connector on both ends) and is higher serial number; it is just as you would expect on e-bay, no rime. I tried this forum for more information or parts, but no luck so far. Let's hope you have better luck. Regards Miroslav Pokorni ----- Original Message ----- From: w1ksz To: TekScopes@... Sent: Wednesday, January 02, 2002 3:45 PM Subject: [TekScopes] WTD: Manual for C1002 Camera I picked up this TEK Video Camera (mounts on Scope face). Does anyone have a manual I can buy or copy ? Or have any info on this camera ? Thanks, Dick, W1KSZ Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: "J" Plugin
Hello Don,
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I enjoyed reading what you had to say. It was interesting but sickening at the same time, too. That business of marketing worrying about 'cannibalizing sale of existing line' makes me barf. The scope that you were describing, in a finished form, would probably make a market where those little Sonny/Tektronix jobs were trying to; I did not see many of them around, what probably means they were not selling. Those things always looked like something that I would put in a curio cabinet in my dinning room, not use as a scope. What a line was that, I just checked what was offered in 1987: two 5 MHz jobs and one each 1 MHz and 500 kHz. That was crowded in itself, but the line certainly could stand a 30 MHz scope. As for threat to 400 series, I do not think so. The 400s had a bigger screen, what counts for a lot when you need to see waveform. Besides, I have seen a lot of 465s used as low cost lab scopes, and I think that 453 and 454 enjoyed same popularity in labs, so their market was safe from assault of a 30 MHz pint sized scope. Unfortunately, in most industries the marketing often carried the day and a product line was milked well past its time. Come to think, maybe that was not all that bad, it gave a chance to competition to catch up. I wander if marketing did not know what to propose for new product and 'cannibalizing sale' was a good line to peddle, instead. On the opposite side of action is what some companies in computer industry were doing in early 90s, starting a rumor of a new system generation before the current one was released. Digital (DEC) was doing that job real well, they would paralyze customer by rumors of the next 'killer' performance system and because of that, number of their customers skipped more than one system generation. That mastery of marketing and dabbling in PCs brought them to ruin. I wander if anything got salvaged from that small scope. The CRT would have been something quite useful; I wander if Honeywell's CRTs benefited from 'nanoscope' development. The Honeywell had a CRT that was around 1" diameter and was used for projection to pilot's visor; I understand that Honeywell was a sole source and display systems were selling well. Those bit slice based processors that you are talking about, that is something that I always wanted to work with, but never had a chance. You could make anything with them; throw in microcode (and plumbing to cool it) and you had any computer you can imagine. I must have sinned, God sentenced me to work with Intel and RCA only. Could have been worse, too; at least I avoided Rockwell processor. When we are around next time, before we get to middle age again, you pay better attention and I will try those bit slice jobs. Regards Miroslav Pokorni ----- Original Message -----
From: donlcramer@... To: TekScopes@... Sent: Monday, January 07, 2002 9:37 PM Subject: Re: [TekScopes] "J" Plugin Speaking of prototypes, I am fascinated by them, whether Tek or someone elses'. They represent someone's vision and generally also a lot of effort, so it would be nice if something of it could be saved for history. Homage to those that tried but failed I guess. Unfortunately, I have a rather small house to be collecting this kind of stuff. Hopefully at least the literature will end up with Stan for the future Tek museum. I vaguely remember seeing a few prototype products from my days at Tek (late 70's). One was the "nanoscope", which was shown at a yearly Tek Labs show (where the corporate guys got to see what the lab coats were up to). It was about a third the size of a 200 series handheld (the nanoscope that is, not the show--the show took up the entire Bldg 50 auditorium). It didn't get much further than a rough prototype I believe. And the CRT looked nice. Another was some pretty densely packed rackwidth size instruments which I was told were network analyzers. That was back when I thought a network was something that broadcast TV shows. I would love to hear the story of that effort (it was adjacent the Spectrum Analyzer group, part of Communications Division). Yet another was the 4054, which was a bit slice version of the 4051/4052 family desktop computers. Included a racy fast custom graphics processor, also bit slice based. I understood it had super, super fast hardware with real, real slow software. I was told the dozen prototypes were ultimately bandsawed in the Model Shop. :< Also something out of the young Digital Service Instruments (DSI) offshoot of Portables called the PET, which I think stood for Programmable Electronic Tester. A largish portable scope size enclosure with, I recollect, an 8085 based micro and a bunch of interface cards. As the name implies, you plug this box into your big system of some sort and it exercises it for you and tells you what's wrong. I think the problem was defining what it was going to plug into, and how was the specialized test software to be written? When the group moved, they left behind a bunch of neat prototype mechanical enclosure bits which I used to make G jobs out of. And there was an internal tool called the board bucket, a card cage microprocessor based computer system. I think it started as an engineering tool when the 6800 based 4051 was developed, but became an internal entity all it's own with cards, power supply, firmware, and engineering support. Another thing I came across in Tek Labs were 7K scope racks in the style of TM500. That is, they were nicely built cages with power supplies which took (6?) 7K type plug-ins. They had no CRT related hardware in them. Perhaps these were only made for internal use, and perhaps before the real TM500 series came out. I never saw them with real 7K plugins installed. Only 7K plugin mechanicals with custom hardware (like CRT test electronics) installed. They were real nicely made, heavy and robust mainframes compared to the TM500 equivalents, with regulated supplies in them like 7K scopes. I recollect the plug-in mechanical bits and the blank PCB were available in engineering stock for those which wanted to build something into them. I heard about, but never saw, some higher speed 200 series handhelds. I believe they attained 35MHz but had dismal battery life. The engineer who told me about this (I think he worked on it as a matter of fact) said there was concern in management that that kind of performance would just cannibalize the sales of the 400 series so the program was never pursued seriously. Throughout my time at Tek I would hear variations of this kind of story as a reason promising ideas were stopped. That is, some new idea would hurt sales of existing products, so was stopped. Of course, now that I'm middle aged, I wish I would have paid better attention to all this in the first place. Fortunately, there is this news group now! Ignore me if this was discussed previous to my joining. Hope I'm not being a bore here... Don Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: "J" Plugin
Speaking of prototypes, I am fascinated by them, whether Tek or someone
elses'. They represent someone's vision and generally also a lot of effort, so it would be nice if something of it could be saved for history. Homage to those that tried but failed I guess. Unfortunately, I have a rather small house to be collecting this kind of stuff. Hopefully at least the literature will end up with Stan for the future Tek museum. I vaguely remember seeing a few prototype products from my days at Tek (late 70's). One was the "nanoscope", which was shown at a yearly Tek Labs show (where the corporate guys got to see what the lab coats were up to). It was about a third the size of a 200 series handheld (the nanoscope that is, not the show--the show took up the entire Bldg 50 auditorium). It didn't get much further than a rough prototype I believe. And the CRT looked nice. Another was some pretty densely packed rackwidth size instruments which I was told were network analyzers. That was back when I thought a network was something that broadcast TV shows. I would love to hear the story of that effort (it was adjacent the Spectrum Analyzer group, part of Communications Division). Yet another was the 4054, which was a bit slice version of the 4051/4052 family desktop computers. Included a racy fast custom graphics processor, also bit slice based. I understood it had super, super fast hardware with real, real slow software. I was told the dozen prototypes were ultimately bandsawed in the Model Shop. :< Also something out of the young Digital Service Instruments (DSI) offshoot of Portables called the PET, which I think stood for Programmable Electronic Tester. A largish portable scope size enclosure with, I recollect, an 8085 based micro and a bunch of interface cards. As the name implies, you plug this box into your big system of some sort and it exercises it for you and tells you what's wrong. I think the problem was defining what it was going to plug into, and how was the specialized test software to be written? When the group moved, they left behind a bunch of neat prototype mechanical enclosure bits which I used to make G jobs out of. And there was an internal tool called the board bucket, a card cage microprocessor based computer system. I think it started as an engineering tool when the 6800 based 4051 was developed, but became an internal entity all it's own with cards, power supply, firmware, and engineering support. Another thing I came across in Tek Labs were 7K scope racks in the style of TM500. That is, they were nicely built cages with power supplies which took (6?) 7K type plug-ins. They had no CRT related hardware in them. Perhaps these were only made for internal use, and perhaps before the real TM500 series came out. I never saw them with real 7K plugins installed. Only 7K plugin mechanicals with custom hardware (like CRT test electronics) installed. They were real nicely made, heavy and robust mainframes compared to the TM500 equivalents, with regulated supplies in them like 7K scopes. I recollect the plug-in mechanical bits and the blank PCB were available in engineering stock for those which wanted to build something into them. I heard about, but never saw, some higher speed 200 series handhelds. I believe they attained 35MHz but had dismal battery life. The engineer who told me about this (I think he worked on it as a matter of fact) said there was concern in management that that kind of performance would just cannibalize the sales of the 400 series so the program was never pursued seriously. Throughout my time at Tek I would hear variations of this kind of story as a reason promising ideas were stopped. That is, some new idea would hurt sales of existing products, so was stopped. Of course, now that I'm middle aged, I wish I would have paid better attention to all this in the first place. Fortunately, there is this news group now! Ignore me if this was discussed previous to my joining. Hope I'm not being a bore here... Don |
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Re: WTD: Manual for C1002 Camera
Richard W. Solomon
I "reverse engineered" the power connector and figured out the pin-out. So
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Show quoted text
far I have not gotten anywhere on getting a manual. If all else fails, I'll probably just put it up for sale and move on to something else. I got this with a lot of Tektronix scope cameras, got two C-50's left and this orphan. Regards, Richard S. -----Original Message-----
From: Miroslav Pokorni [mailto:mpokorni2000@...] Sent: Monday, January 07, 2002 12:05 AM To: TekScopes@... Subject: Re: [TekScopes] WTD: Manual for C1002 Camera Hello Dick, I own two of C1001 cameras and do not have any documentation. Perhaps we can share notes. So far, I found out that camera part was made by NEC and puts out an NTSC signal. There are several adapters to mount camera to scope, probably the most useful are: 1.. 016-0248-01 for small screen 7000 series scopes (not 7600, though and 7600 is not recommended; probably image is too big) 2.. 016-0269-03 for 2400 and 'new' 400 (465) 3.. 016-0306-01 for 'old' 400 series (485, 454 etc.) I am looking for #1 adapter while #2 came with one of cameras. I am also looking for documentation and selected accessories; I do not think that original board for PC would be very useful, that might be a pre-ISA slot and even if you have the slot in your PC, drivers might be missing or incompatible with available Wander from Redmond. What I found so far is: 1.. The 9-pin connector takes in 12 V, around 300 mA at pins 1 (positive) and 3 (ground) and signal is on pins 4 (shield/ground) and 5 (video); there are two other pins used which bring in calibration voltages and go only to BNC and two test points. 2.. Someone on this forum suggested to use 'Snappy' for frame capture; that device is available on e-bay for around $10, but manufacturer seems to be out of business. I played a bit with this camera, with limited success. The Snappy has a 'monitor' mode, a quasi real time but that was not good enough to adjust focus, so I set focus to infinite and looked at the picture of nearby window; that way basic camera operation was verified. With great difficulties I managed to focus camera for oscilloscope image. Adjusting light intensity exhausted last shreds of my patience and now camera has to wait. However, the best results I got when TV receiver's video input was used, a real real-time image. I would like to find out how this camera or frame capture board were triggered to capture desired frame. I presume that was done by trailing edge of scope gate signal. Out of curiosity, how much did you pay for your camera? The first one I paid around $70 (with shipping) while second one was mine for $20 (with shipping) and I do not see the difference. The cheaper one came with scope adapter and a cable (9 pin male D connector on both ends) and is higher serial number; it is just as you would expect on e-bay, no rime. I tried this forum for more information or parts, but no luck so far. Let's hope you have better luck. Regards Miroslav Pokorni ----- Original Message ----- From: w1ksz To: TekScopes@... Sent: Wednesday, January 02, 2002 3:45 PM Subject: [TekScopes] WTD: Manual for C1002 Camera I picked up this TEK Video Camera (mounts on Scope face). Does anyone have a manual I can buy or copy ? Or have any info on this camera ? Thanks, Dick, W1KSZ Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: "J" Plugin
Stan or Patricia Griffiths
Hi Paul,
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Show quoted text
The type "J" became the 1A1 in real life. (The 1A2 was called the type "F", originally.) Neither the type J or F ever reached production. I save any of that kind of historic stuff that happens to fall into my possession but proto types (with a few exceptions) are not very interesting to me. Stan w7ni@... pauledst wrote: I'm mostly a reader of this group as most posters are far more |
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Re: WTD: Manual for C1002 Camera
Hello Dick,
toggle quoted message
Show quoted text
I own two of C1001 cameras and do not have any documentation. Perhaps we can share notes. So far, I found out that camera part was made by NEC and puts out an NTSC signal. There are several adapters to mount camera to scope, probably the most useful are: 1.. 016-0248-01 for small screen 7000 series scopes (not 7600, though and 7600 is not recommended; probably image is too big) 2.. 016-0269-03 for 2400 and 'new' 400 (465) 3.. 016-0306-01 for 'old' 400 series (485, 454 etc.) I am looking for #1 adapter while #2 came with one of cameras. I am also looking for documentation and selected accessories; I do not think that original board for PC would be very useful, that might be a pre-ISA slot and even if you have the slot in your PC, drivers might be missing or incompatible with available Wander from Redmond. What I found so far is: 1.. The 9-pin connector takes in 12 V, around 300 mA at pins 1 (positive) and 3 (ground) and signal is on pins 4 (shield/ground) and 5 (video); there are two other pins used which bring in calibration voltages and go only to BNC and two test points. 2.. Someone on this forum suggested to use 'Snappy' for frame capture; that device is available on e-bay for around $10, but manufacturer seems to be out of business. I played a bit with this camera, with limited success. The Snappy has a 'monitor' mode, a quasi real time but that was not good enough to adjust focus, so I set focus to infinite and looked at the picture of nearby window; that way basic camera operation was verified. With great difficulties I managed to focus camera for oscilloscope image. Adjusting light intensity exhausted last shreds of my patience and now camera has to wait. However, the best results I got when TV receiver's video input was used, a real real-time image. I would like to find out how this camera or frame capture board were triggered to capture desired frame. I presume that was done by trailing edge of scope gate signal. Out of curiosity, how much did you pay for your camera? The first one I paid around $70 (with shipping) while second one was mine for $20 (with shipping) and I do not see the difference. The cheaper one came with scope adapter and a cable (9 pin male D connector on both ends) and is higher serial number; it is just as you would expect on e-bay, no rime. I tried this forum for more information or parts, but no luck so far. Let's hope you have better luck. Regards Miroslav Pokorni ----- Original Message -----
From: w1ksz To: TekScopes@... Sent: Wednesday, January 02, 2002 3:45 PM Subject: [TekScopes] WTD: Manual for C1002 Camera I picked up this TEK Video Camera (mounts on Scope face). Does anyone have a manual I can buy or copy ? Or have any info on this camera ? Thanks, Dick, W1KSZ Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: Way off topic: Radio antennas
I will through in my 2 cents worth: does new scaner has 50 Ohm antenna input? A piece of wire is a high impedance ' antenna.
Regards Miroslav Pokorni james89es <james89es@...> wrote: I know this has nothing to do with Tek-scopes (I do own a RM547, so I do belong "in the club") but I know many of you are also into HAM radio. Here's the story: I bought my mother a new police scanner (from Rasio Shack) for x- mas. She has had scanners for 25+ years. Her old Uniden was 15 years old. The outside antenna is about 20 years old. Problem: When we plug the outside antenna into the new scanner, it CAUSES static and reduces signal strength!! I ruled out the plug on the radio itself by connecting a short piece of cable, and touching the bare wire with my finger. In this scenario the signal is stronger and there's less static when I touch the wire, as I would expect. Once I plug in the outside antenna, however, more static and less strength ... even if I leave the little inside antenna on. They replaced the coax just in case, they used the recommended 50ohm cable - a run of about 30 feet. What would explain this?? Keep in mind that the old Uniden still works fine with the outside antenna. Yahoo! Groups SponsorADVERTISEMENT To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. --------------------------------- Do You Yahoo!? Send FREE video emails in Yahoo! Mail. |
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"J" Plugin
pauledst
I'm mostly a reader of this group as most posters are far more
knowledgable. However in going over my manuals to weed out duplicates and ones that I'll never have hardware for I came across an interesting preview sheet of a "letter series" plug-in. The title is "TYPE J DUAL-TRACE PLUG-IN UNIT". It's printed on semi slick paper, one sided and has a red stripe accross the top with "tentative" in white. There is a picture of a real item with all the right knobs, logo and numbers but the S/N is blank. The specs given are 5 mv/cm, 35 Mc and the usual two channel modes. Near the bottom right is the date 8/63. Near the bottom left is a document control number "A-2186". In looking through my catalogs from 1963 to 1966 and 1971 I find no "J" listed. Stan doesn't list one on his web site. The question: Was this plug-in ever produced? Secondly, Is there a repository or a historian who is collecting these odd bits of literature? Paul |
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Re: Does anyone know what a "TEK 067-0561-01 CALIBRATION FIXTURE" is good for?
Stan or Patricia Griffiths
It was primaily used to produce test patterns for the 601 and 611 Storage
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Monitors. Not really too useful since the 601 and 611 are not too useful . . . Stan w7ni@... Lynn Lewis wrote: I've been looking for over an hour now and can't find anything. |
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Re: WTD: Manual for C1002 Camera (DCS)
Stan or Patricia Griffiths
Last year, I went to a government surplus sale conducted by Levy-Latham in
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central Calfornia and saw pallets with ten 7912s on each one. There must have been at least 15 pallets of them. You had to bid on at least on pallet of them. I put in a bid on one pallet . . . I only wanted one 7912 for my collection. I lost on that pallet, but if I had put that bid on a different pallet, I would have won it. I didn't DARE bid on more than ONE pallet . . . I might have won 20 7912's! There were THOUSANDS of Tek instruments up for sealed bid at this sale. I probably placed 50 different bids. I lost every one of them. It was a fun and interesting trip but a real loser, from a financial point of view . . . for me, anyway. Stan w7ni@... Craig Sawyers wrote: (In the R7912, one long finely focusedI remember this unit well. Back in the late '70s I used this beast to |
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Need Help with 7704A Power Supply
w1ksz
I have picked up a nice clean 7704A mainframe that has a power supply
problem. The first thing I did was check the +5v Lamp voltage and it was very low (~0.8v). I looked at it with another scope and saw a string of widely spaced low voltage pulses (??). It looks like the Frequency Converter section is not oscillating. Any ideas what I can look at ? Failing that, does anyone have a spare Power Supply ? The scope is just too clean to scrap at this point. Thanks, Dick, W1KSZ |
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Re: Does anyone know what a "TEK 067-0561-01 CALIBRATION FIXTURE" is good for?
Lynn Lewis
Thanks. It looks interesting but I'm afraid I've already bought enough
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interesting stuff to keep me busy for a while. Thanks for the info? I'm going to let it pass. -----Original Message-----
From: Jim Reese [mailto:nfeinc@...] Sent: Thursday, January 03, 2002 3:46 PM To: TekScopes@... Subject: Re: [TekScopes] Does anyone know what a "TEK 067-0561-01 CALIBRATION FIXTURE" is good for? It shows up as a raster generator. 16-24 line pairs. 300-400 dots. 1 volt output. The military paid $5800 each for them. It sounds like it may be used for adjusting Tek displays of some sort. Jim Reese --- Lynn Lewis <mrzuzu@...> wrote: > I've been looking for over an hour now and can't > find anything. > > > > > > ------------------------ Yahoo! Groups Sponsor > > To unsubscribe from this group, send an email to: > TekScopes-unsubscribe@... > > > > Your use of Yahoo! Groups is subject to > > > __________________________________________________ Do You Yahoo!? Send your FREE holiday greetings online! To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: Does anyone know what a "TEK 067-0561-01 CALIBRATION FIXTURE" is good for?
It shows up as a raster generator.
16-24 line pairs. 300-400 dots. 1 volt output. The military paid $5800 each for them. It sounds like it may be used for adjusting Tek displays of some sort. Jim Reese --- Lynn Lewis <mrzuzu@...> wrote: I've been looking for over an hour now and can't
__________________________________________________ Do You Yahoo!? Send your FREE holiday greetings online! |
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Tektronix 545D
Reed Dickinson
I saw the note from Dean and it brought back memories. I worked for IBM in
1957 to 1959 as bench technician. I used a 541 then a 545. I really fell in love with the 545 and wanted a scope for home use so, I managed to buy a DuMont 304, it was not up to par with the 545. Being spoiled for a 545 but not having the cash available to purchase one and, having access to all the parts, I decided to make one. From 1957 to 1959 I constructed a 541. In 1966 I came across a delay board for the scope and added it, it then became a 545, I call mine a 545D. It has all the features of the 545 with the addition of a running time meter. I wound the original delay line on wood dowels with costume beads for the taps. I later added a factory made delay line. The home made CA and K plug in's are mounted in the upper right rather than the lower left. The mercury pulser plug in got lost during a move. Someday, when I drive up the coast, it is going to Stan Griffiths for his museum. If anyone wants a picture, drop me a line as it is in my garage and still works great. Reed Dickinson S. CA. reed-d@... |
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