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Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Vintage Heathkit HD-1481 Remote Coax Switch Kit
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The inventions and products featured on these pages were chosen either for their uniqueness in the RF engineering realm, or are simply awesome (or ridiculous) enough to warrant an appearance.

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Vintage HD-1481 Remote Coax Switch Kit Fall 1984 Catalog - RF Cafe Cool Product

Vintage HD−1481 Remote Coax Switch in the Fall 1984 Heathkit catalog.

This vintage Heathkit HD−1481 Remote Coax Switch kit is one the latest unbuilt Heathkit kits which appeared on eBay. I have been saving the images in order to preserve the history. The constantly growing list is at the lower right.

The first instance I could find for HD−1481 being offered for sale was in the Fall 1984 Heathkit catalog, at a cost of $89.95 ($230.61 in 2021 money per the BLS). A comparable remote coaxial switch today is the Ameritron RCS-4 at $199.95, so the price has remained fairly constant.

Use a single feedline to select from up to four antennas.

The Heathkit HD−1481 Remote Coaxial Switch is a tower or mast-mounted RF coaxial switch that you can conveniently control from inside your house. the Switch consists of a remote unit - outdoor switching network - and an indoor control unit.

The remote unit if rain tight and contains the RF switches that permit selecting the desired antenna. The unit is easily mounted with a single clamp. The control unit contains the power supply and provides switching signals to the remote unit. A front panel switch permits selecting the desired antenna. The Remote Coax Switch will handle 2000 watts PEP with a VSWR of 1.15:1 or less below 300 MHz.

Kit HD−1481, Shpg. wt. 5 lbs. .............89.95 

Here is the HD−1481 owner's Manual with building and operating instructions.

Heathkit HD−1481 Remote Coax Switch Kit Parts

(eBay photo)

Heathkit HD−1481 Remote Coax Switch Assembled

 (eBay photo)

 Heathkit HD−1481 Remote Coax Switch Documentation

(eBay photo) 

 Heathkit HD−1481 Remote Coax Switch Documentation

(eBay photo) 

 

 Heathkit HD−1481 Remote Coax Switch Schematic

(eBay photo) 

Heathkit Fall 1984 Catalog - RF Cafe

Heathkit Christmas 1987 Catalog Cover

(worldradiohistory.com photo)

  Heathkit HD−1481 Remote Coax Switch Schematic

(eBay photo) 

 Heathkit HD−1481 Remote Coax Switch Documentation

(eBay photo) 

 Heathkit HD−1481 Remote Coax Switch Documentation

(eBay photo) 

 Heathkit HD−1481 Remote Coax Switch Documentation

(eBay photo) 

Heathkit products were well known for the completeness of its instruction manuals, with clearly illustrated instructions. During the writing and editing process, Heathkit employees were given pre-production kits to take home and build, while annotating any difficulties or errors encountered. Doing so helped minimize the situation where the writer inadvertently assumes his own familiarity with the process is shared by the customer. Having built a few Heathkit products myself in the 1970s when I did not have a lot of experience with electronics assembly, I can attest to the user friendliness of the instructions. Heathkit still sells many of its vintage manuals for around $15, which is what you would pay on eBay.

 

Contact Info

Heath Company (Heathkit)

Operations: PO Box 15, Ottsville, PA 18942

R&D/Mfg: PO Box 3115, Santa Cruz CA 95063

Phone: +1 (831) 480-4368

E-Mail: info.2015@2015.heath.company

 

 

Posted June 11, 2021

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