Telonic 4053 sweep generator

Just posting a brief note to perhaps save somebody else some research effort.

This weekend, at the Pacificon hamfest, I acquired a Telonic 4053A RF sweep generator. It's a nice, compact little box with three bands (0-450 MHz, 450-900, and 900-1350), sweep widths from 200 kHz to 500 Mhz, slide-switch and vernier attenuators, a bunch of crystal- controlled frequency markers, and rated output of +7 dBm.

Naturally, I wanted a manual. Initial searches came up empty, with little information other than that this is a "special model" built to FAA specifications (and mine has an FAA stamp on the back). A few postings from years ago suggested that other buyers of these surplus sweep generators also failed to find manuals.

After digging a bit deeper, I seem to have lucked out. At KO4BB's web site, I found a couple of Telonic manuals in the "miscellaneous test equipment" section. One was for the Model 1205 sweep generator, which appears to be the same device - identical physical appearance, and the internal layout seems to match mine. The 1205 is described as being able to take a set of up to 7 marker-generator crystal-oscillator sub-boards, and I suspect that the "4053" may simply be a 1205 with an FAA-specified set of marker boards and a front panel silk-screened accordingly. There may be other differences but, if so, they don't seem to be profound ones, and the 1205 manual and schematic and alignment procedures should still prove useful.

My new acquisition seems to work, making the $20 I paid for it a real bargain.

Reply to
Dave Platt
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Archive.org took the remaining manuals when Manualsplus.com stopped selling obscure manuals. They took about 25,000 manuals that will be scanned, and put online for free. I haven't seen a timetable, or if there iss even a completed inventory of what they have, but I would check their site from time to time to see if they have it.

They have added a lot of old semiconductor data books. If you are going to download a lot of them, use bit torrent or other software to reduce the loading on their servers. There is also an area with a lot of old electronics and computer magazines you can read online, or download.

Reply to
Michael A. Terrell

Are you aware of a widget/app to cross-compare an index of paper manuals against the main www resources, to determine what needs scanning in and uploading somewhere , so I can safely dump the paper-based repeats ?

Reply to
N_Cook

There are currently too many separate archives of manuals, so hang on to the paper manuals for now. It may take another decade for the volunteers to scan and process all of those manuals. If you don't want, or need them, put them on Ebay. Collectors like original manuals to go along with equipment that is to go into a museum.

BTW, Archive.com has a collection of the old GE Ham News publications:

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Also, issues of 73 magazine:

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Reply to
Michael A. Terrell

Apparently Wayne Green said sometime before he died "Take it", which is why it's there. I thought in the past issues of who owned the copyright on the articles came up, but "73" seemed to buy all the rights. I had a few short articles in there and in Kilobaud, filler, and one time about

1990, I came upon a book from Tab collecting computer articles from both magazines at a used book sale. And there was one of those fillers, they had the right, but that was the first I knew about it.

They also have Kilobaud, probably on the same deal, and a number of other computer magazines. Not sure how those got there other than "I have no interest". Some of the computer-specific magazines would have little value except for the relative few who are still using and collecting them. It is worth checking. Actually, there was a Motorola book about PLLs from the early seventies that I'd always wanted, and recently it came to mind, so did a search, and it showed up at bitsavers.

Byte can be found elsewhere, though I'm surprised McGraw-Hill isn't fussing over that.

Michael

Reply to
Michael Black

If only there was indexes constructed of all the main repositries, rather than search boxes, that would be a great help. Another factor is scanned-in incomplete manuals, not mentioned on the site. I downloaded one of elektrotanya last week that was a revision manual and only one small part of the schematic

Reply to
N_Cook

Is Byte still being published? Those early copies aren't costing them enough to make it worth suing a non profit, anyway. The bad publicity for scanning 40 year old magazines isn't worth calling their lawyers about.

Bitsaves is also on

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Reply to
Michael A. Terrell

I never thought very much about that elektrotanya website. Very low grade scans, and often at such a low DPI that they are hard or impossible to read. Was it listed as a revision? That should have told you that it would be a waste of time, without the full manual.

Archive.org has a staff of volunteers to scan the material properly. They work with both public and private libraries, as well as companies who want to put their old documents into the public domain. I see that they have added the M.I.T. library, but I didn't check to see if the RadLab series of books are included. They cover early electronics, as the field developed during W.W.II.. They were classified, an controlled documents for a long time.

Reply to
Michael A. Terrell

I wonder if there is a UK document-scanning feed into the archive.org? The British Library never bothered with data manuals, Science Museum/Wroughton library has some but not much. My local university library literally dumped all their electronic data manuals from the 1960s/70s in a skip for landfill , without prior checking if they were available online anywhere.

Reply to
N_Cook

I see a link to a library in Sweden.

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My eyes are really bothering this morning, so I can't wade through all of their information, right now. I have been up over 27 hours, and I am waiting on a package delivery before I can go to bed.

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has links to their FAQ, and information on how to contact them.

Reply to
Michael A. Terrell

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