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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Please does anyone have scans of the spectrum analyser project from late 86/
early 87 Television magazine? The project is to rearrange a mono portable so a vertical TB derived 30V sawtooth sweeps the tuner varicaps, while the AGC switches the beam current line by line to indicate the relative position and amplitude of any signals the UHF tuner finds. The project was in several installments, starting (I'm fairly sure) late 86. Unfortunately the relevant issues seem to have become missing from my collection! Thanks. |
#2
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Please does anyone have scans of the spectrum analyser project from late 86/
early 87 Television magazine? The project is to rearrange a mono portable so a vertical TB derived 30V sawtooth sweeps the tuner varicaps, while the AGC switches the beam current line by line to indicate the relative position and amplitude of any signals the UHF tuner finds. The project was in several installments, starting (I'm fairly sure) late 86. Unfortunately the relevant issues seem to have become missing from my collection! You might google "Poor man's spectrum analyzer" - this is a somewhat similar project, I believe. -- Dave Platt AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
#3
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Ian Field wrote in message
... Please does anyone have scans of the spectrum analyser project from late 86/ early 87 Television magazine? The project is to rearrange a mono portable so a vertical TB derived 30V sawtooth sweeps the tuner varicaps, while the AGC switches the beam current line by line to indicate the relative position and amplitude of any signals the UHF tuner finds. The project was in several installments, starting (I'm fairly sure) late 86. Unfortunately the relevant issues seem to have become missing from my collection! Thanks. I probably have the issue/s but it means delving into the most inaccessible part of a cold shed. If no active replies in the next few days I will go trekking If its in 1986 Jan,Feb,May,Jul,Aug,Sep,Oct,Nov,Dec 1987 Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Nov |
#4
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On 30/01/2012 08:21, N_Cook wrote:
I probably have the issue/s but it means delving into the most inaccessible part of a cold shed. If no active replies in the next few days I will go trekking If its in 1986 Jan,Feb,May,Jul,Aug,Sep,Oct,Nov,Dec 1987 Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Nov If it helps, Spectrum Analyser Project - G11 Chassis November 1986, Page 19 Found in the Television magazine index program at http://www.davesergeant.com/dstv.htm -- Adrian C |
#5
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![]() "Adrian C" wrote in message ... On 30/01/2012 08:21, N_Cook wrote: I probably have the issue/s but it means delving into the most inaccessible part of a cold shed. If no active replies in the next few days I will go trekking If its in 1986 Jan,Feb,May,Jul,Aug,Sep,Oct,Nov,Dec 1987 Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Nov If it helps, Spectrum Analyser Project - G11 Chassis November 1986, Page 19 Found in the Television magazine index program at http://www.davesergeant.com/dstv.htm -- Adrian C Looks like I've somehow got confused! - the project I was thinking about was based on a "generic" monochrome portable. It could be; "A spectrum analyser conversion" 08/2004 P588 (& possibly more parts in following issues) - which also seem to have gone missing! |
#6
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![]() "N_Cook" wrote in message ... Ian Field wrote in message ... Please does anyone have scans of the spectrum analyser project from late 86/ early 87 Television magazine? The project is to rearrange a mono portable so a vertical TB derived 30V sawtooth sweeps the tuner varicaps, while the AGC switches the beam current line by line to indicate the relative position and amplitude of any signals the UHF tuner finds. The project was in several installments, starting (I'm fairly sure) late 86. Unfortunately the relevant issues seem to have become missing from my collection! Thanks. I probably have the issue/s but it means delving into the most inaccessible part of a cold shed. If no active replies in the next few days I will go trekking If its in 1986 Jan,Feb,May,Jul,Aug,Sep,Oct,Nov,Dec 1987 Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Nov Looks like I've somehow got confused! - the project I was thinking about was based on a "generic" monochrome portable. It could be; "A spectrum analyser conversion" 08/2004 P588 (& possibly more parts in following issues) - which also seem to have gone missing! |
#7
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![]() Ian Field wrote: Please does anyone have scans of the spectrum analyser project from late 86/ early 87 Television magazine? The project is to rearrange a mono portable so a vertical TB derived 30V sawtooth sweeps the tuner varicaps, while the AGC switches the beam current line by line to indicate the relative position and amplitude of any signals the UHF tuner finds. The project was in several installments, starting (I'm fairly sure) late 86. Unfortunately the relevant issues seem to have become missing from my collection! Have you tried 'Google Books'? A lot of old magazines have been scanned and can be read online. You can't save the images but you can use 'Print Screen' to copy it in pieces, if they have it. -- You can't have a sense of humor, if you have no sense. |
#8
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Michael A. Terrell wrote in message
... Ian Field wrote: Please does anyone have scans of the spectrum analyser project from late 86/ early 87 Television magazine? The project is to rearrange a mono portable so a vertical TB derived 30V sawtooth sweeps the tuner varicaps, while the AGC switches the beam current line by line to indicate the relative position and amplitude of any signals the UHF tuner finds. The project was in several installments, starting (I'm fairly sure) late 86. Unfortunately the relevant issues seem to have become missing from my collection! Have you tried 'Google Books'? A lot of old magazines have been scanned and can be read online. You can't save the images but you can use 'Print Screen' to copy it in pieces, if they have it. -- You can't have a sense of humor, if you have no sense. Unfortunately it seems unlikely. search term "television" too numerous and no magazine/periodical sub-section , IWS, in http://books.google.com/advanced_book_search? I tried "wireless world" and only 2 editions Does it need representative ISBN range numbers? Anyone more familiar with that bit of google? |
#9
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![]() N_Cook wrote: Michael A. Terrell wrote: Have you tried 'Google Books'? A lot of old magazines have been scanned and can be read online. You can't save the images but you can use 'Print Screen' to copy it in pieces, if they have it. Unfortunately it seems unlikely. search term "television" too numerous and no magazine/periodical sub-section , IWS, in http://books.google.com/advanced_book_search? I tried "wireless world" and only 2 editions Does it need representative ISBN range numbers? i just type in the book title, or name of a magazine and the date and find a lot of what I want to see. If it's not there, it means that they haven't got their hands on a hard copy to scan, or it hasn't been scanned yet. Here is how they do the 'scanning'. http://www.npr.org/blogs/library/2009/04/the_granting_of_patent_7508978.html -- You can't have a sense of humor, if you have no sense. |
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