Anatech Electronics (RF Filters) - RF Cafe
LadyBug Technologies LB480A RF Power Sensor Connectors - RF Cafe
 

About RF Cafe

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...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:

AirplanesAndRockets.com

Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes App Notes Calculators Education Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Homepage Thank you for visiting RF Cafe!
Exodus Advanced Communications Best in Class RF Amplifier SSPAs

Vintage Heathkit DG-140 Two-Station Intercom Kit
Cool Product Report

Featured Product Archive

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.

| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |

Heathkit catalogs can be found at World Radio History and Heathkit Catalogs.

These are the kits for which I have photos:

Heathkit HM−1002 RF Power Meter

My Heathkit IM−17 Multimeter

My Heathkit ET−3100 Design Experimenter

Heathkit GR−48 AM/FM Table Radio Kit

Heathkit DG−140 Two-Station Intercom Kit

Heathkit HD−1481 Remote Coax Switch

Heathkit AA-1250 Stereo Receiver

Heathkit GD−1380 Video Game Pong

Heathkit IG−5257 TV Post-Marker / Sweep Generator

Heathkit SA−2060A Deluxe Antenna Tuner

Heathkit IM−2400 Hand-Held 512 MHz Frequency Counter

Heathkit CR−1 AM Crystal Radio Receiver

Heathkit HW−99 Novice CW Transceiver

Heathkit SA−5010 uMatic Morse Code Keyer

Heathkit GD−1114 Intercom Speaker System

Occasionally an unbuilt vintage Heathkit item appears on eBay with really nice photos of the contents. In fact, I have a Saved Search that sends me an e-mail whenever one shows up. This morning, a Heathkit DG−140 Two-Station Intercom kit appeared on auction. The instruction booklet has a publish date of 1972, so I looked for a copy of it on the WWW but the only thing I could find was a PDF for purchase. Despite the 1972 date, it appears it was 1973 when the DG−140 was first available. The 1971 catalog still shows the previous version, the DG−141 (which you might understandably think would be the newer model number). There is a big difference in the chassis configuration from the DG−141 to the DG−140. Per the 1973 Heathkit catalog, the DG−140 was priced at $29.95 ($184.91 in 2021 money - a whopping 6.2x factor in 48 years).

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 stills sells many of its vintage manuals for around $15, which is what you would pay on eBay.

Vintage Heathkit DG-140 Two-Station Intercom Kit - RF Cafe Cool Product

Vintage Heathkit DG-140 Two-Station Intercom Kit (components #1) - RF Cafe Cool Product

Vintage Heathkit DG-140 Two-Station Intercom Kit (components #2) - RF Cafe Cool Product

Vintage Heathkit DG-140 Two-Station Intercom Kit (components #4) - RF Cafe Cool Product

Vintage Heathkit DG-140 Two-Station Intercom Kit (components #5) - RF Cafe Cool Product

Vintage Heathkit DG-140 Two-Station Intercom Kit  (box) - RF Cafe Cool Product

 

Vintage Heathkit DG-140 Two-Station Intercom Instruction Manual (#1) - RF Cafe Cool Product

Vintage Heathkit DG-140 Two-Station Intercom Instruction Manual (#2) - RF Cafe Cool Product

Vintage Heathkit DG-140 Two-Station Intercom Instruction Manual (#3) - RF Cafe Cool Product

Vintage Heathkit DG-140 Two-Station Intercom Instruction Manual (#4) - RF Cafe Cool Product

Vintage Heathkit DG-140 Two-Station Intercom Instruction Manual (#5) - RF Cafe Cool Product

Vintage Heathkit DG-140 Two-Station Intercom Instruction Manual (#6) - RF Cafe Cool Product

Vintage Heathkit DG-140 Two-Station Intercom Instruction Manual (#7) - RF Cafe Cool Product

 

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 March 19, 2021

high frequency PCB of PCBONLINE
ConductRF Phased Matched RF Cables - RF Cafe
Res-Net Microwave - RF Cafe
 

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free