Home > Products > Four Letter Word
READ: NEWS FLASH --- All orders received after 16 July 2006 will be shipped with a totally NEW printed circuit board that provides many more options for building a case for this kit. Click Here to see additional explanations and photos. New purchase options listed.
On This Page:
Order one from our Order Page.
List of parts not supplied in kit
Download Full Documentation
Beginner Kit-Builder Step-wise Easy (SWEZ) Assembly Manual
It's a Word Maker ...in action And it's a Clock Original design by Award-Winning designer, artist, engineer Raymond Weisling.
The Four Letter Word is a contemporary reconstruction of an electronic Nixie Tube sculpture that was created by Raymond Weisling in 1973. The original model was based on very elementary digital electronic circuits. Why? Because 1973 was a few years before the dawn of the modern personal computer era and such technology was simply unavailable or was far too expensive for an application like this. As it was, it cost $195---that is about $780 in today's dollar. "Darn dear, that cost." Today it costs a fraction of that. Thank you Silicon Valley.
The original model appeared in Playboy magazine in the June 1973 issue. A well-known Broadway lyricist-composer ordered almost a dozen of them to give away as gifts in 1973-74, and ordered some more in 2003. A starving student wanted one so badly but couldn't afford it in 1973; now an engineer, in 2003 he finally got his wish. Is it that special? Apparently so.
A discovery of thousands of these Nixie tubes in a warehouse just a few years ago prompted the completion of a revised version that was begun in 1994. That 1994 version was to have only been for a limited number, based on a small stock of extra parts from 1974. However, the current availability of these vintage (ca. 1968-1972 production) Burroughs B-7971 Nixie tubes at reasonable prices allows this unique piece to be produced again.The remarkable thing is that these tubes seem to last forever. A few people who built things with these in 1970-75 have reported to us that their creations are still working. The manufacturer listed a lifetime of 50 000 hours minimum, at the full intensity. This design operates the nixie tubes a bit under full ratings so that it is expected that the tubes will last for years and years. They have to last---nobody makes them anymore.
The reconstructed version incorporates vastly improved criteria for generating interesting words, with considerable attention given to controlling the indeterminate (or random) nature of the display sequences. Words can be displayed one after another, or starting blank with letters or parts of letters added until the whole word is revealed -- a kind of "hangman" type word game. The unit also can display the time, so it is a clock as well.
Words are created by a statistical method based on analysis of several thousand English four-letter words. Using this method many letter combinations that statistically could be real words---but aren't---are generated, such as DILE, VAKE, RULL, and THOD. These are interesting because you can imagine possible meanings for them. Many real words are also created by this process. But the process has limitations, so to balance this method there is a Word Bank of over 2400 real words and common abbreviations that also supplies words for display. It even has a four-level obscenity control, spanning the range from full censoring of certain vulgar words to adding them every few minutes---something for all tastes. After all, the English four-letter word is famous for being abrupt, harsh, and even obscene, but this device proves that these words are only a small part of this rich language that is sweeping the world.Raymond Weisling, who designed versionsof The Four Letter Word in 1973, 1994 and 2002, listened to suggestions from previous owners of the Four Letter Word, and then developed the current model and firmware version with these features:
- Optional Nixie Tube Mounting on the solder or component side of board, to optimize case designs. Unique to Four Letter Word and GeekKlok.
- New High-Priority clock mode with 16 user-selectable ratios of time and word duration.
- Clock shows seconds on underline segment, simulating a left-to-right progress bar.
- 12- or 24-hour clock modes available.
- Original 1973 version Four Letter Word box emulation mode.Step back in time.
- User setting to suppress the Word Bank so only rule-generated words appear.
- User setting to only have Word Bank words appear.
- Speed adjustment option now available.
- Optional Serial RS232 Interface for overriding word display.
- RS232 interface may be easily ganged to multiple units for longer messages.
- Transformerless switchmode power supply for high voltage---simplifies power supply requirements
- Use of original B-7971 nixie sockets or individual socket pins from Mill-Max (Digi-Key, Mouser, etc.).
- May also use flat ZM1350 tube (Telefunken Varisymbol, NOS, from this German supplier)
- High-quality, professional, double-sided printed circuit board with plated-through holes, on FR4 laminate.
![]()
We just don't toss parts in a box. They are carefully sorted and bagged to
coincide with each step in our Step-Wise Easy (SWEZ) assembly manual.
This makes assembly easy for both beginners and experienced professionals.NEXT PHOTOS: Two different mounting options are available. Your case design
can dictate which one is best to show off these vintage tubes. Do you want the
components --- some are a bit tall --- to stand up or hang underneath? You decide.
More Photos are in the Gallery
More features found in the newest FLW kit:
- More words in the Word Bank. Almost double the number from 2002 model ---over 2400 words.
- Much better rule-generated non-words.
- Improved Stick (segment) Hangman performance flow.
- Mixed mode can individually select normal, stick or letter hangman modes for the mixture.
- Improved clock setting button handler. Keep the button pressed for auto-advance of digits.
- Remote Switch to disable display (Tube Saver)
- 8-position DIP switch for user settings.
- Low-priority clock mode---shows time briefly every 20-40 seconds
- High-priority clock mode---clock alternates with one word, with 16 different ratios of speeds
- Letter Hangman---words appear one letter at a time, allowing you to try to guess what the word will be.
- Stick Hangman (also called Segment Hangman)---words appear in fragments, segment by segment.
- Clock time accurately based on power line frequency, which is very accurate over days and months.
- Censor's Delight. In full censor mode various vulgar words are suppressed.
- Censor's Bane. Two different periodic intervals may be selected for when a "tactless" word will appear.
- Segment Test mode. To check the tubes, socket connections and driver circuitry.
- Setting to only have REAL ENGLISH words appear, taken from the Word Bank only
- Setting to let it generate words only by algorithm. Non-words, future words? You decide.
The Step-Wise Easy Assembly Manual (SWEZ) is perfect for the beginner kit builder. Used even by the pro. Our step-by-step manual shows progressive images of the board being assembled, with detailed explanations for each step. Resistors are shown in full colour (with the colours named in the text, too).
Parts placed in earlier steps are shown in gray. The steps (sequences) match the parts sorted into plastic bags in the kit.Greatly speeds assembly and removes the hassles of part identification and sorting.Our USER MANUAL includes user preference settings, theory of operation, the language analysis and indeterminacy processes, parts list, colour assembly drawings, notes on socket options, power supply connections, transformer type and catalog order numbers, schematic wiring diagrams, PCB mounting hole dimensions, and a SWITCH SETTING REFERENCE GUIDE. We strive to give you as much information as possible. Clarity is our utmost goal in making the kit easy to complete. The documentation is updated as required based on suggestions from customers.
We don't ship the documentation. Save a tree: print only what you need to put on paper, from the latest revision.
Additional info on the history and development of the Four Letter Word.
The following parts are not supplied in the FLW3 kit:
Quantity requiredItem Suggested Source 4B-7971 Nixie Tubes As of early 2006, over 1200 tubes remain available. Buyers of the GeekKlok will be sent the name of this source in the UK. The source is guaranteed. If you can't get the tubes, we'll refund your purchase price. The supplies are limited and going down. These tubes were made in the 1960s and up to about 1971. Sockets are extremely limited, but we provide data on excellent substitutes. Also flat tubes, typoe ZM1350, will also work, if the ZM1350 option is ordered.
4
68Nixie tube sockets
OR
socket pinsSockets are getting rare as of early 2006 (many remaining ones have minor damage). We provide info on excellent alternative socket pins in the User Manual. The PCB will accept both types. Sockets may cost $6 each, the pinsare easier to work with and only cost about $3/tube. 1Case Do it yourself. BE INVENTIVE!!
In USA or Canada check out this site ---Power Supply 12 VAC 350 ma(minimum) Wallwart. Our User Manual gives order number from Mouser and Digi-Key.
The Four Letter Word (FLW) is available in these forms:
Order Code & Item Description Qty 1 US$ Qty 2 each Qty 3-6 eachFLW1K Four Letter Word single kit 124.00 120.00 117.00FLW2K Four Letter Word twin-pack kit 199.00 190.00 184.00PCBAM ZM1350 Varisymbol bare PCB substitute for B-7971 19.00 17.25 16.00FLWUN FLW assembled & tested, split PCB, folded UNDER 169.00 165.00 159.00FLWBK FLWassembled & tested, split PCB, folded BACK 169.00 165.00 159.00FLWCL FLW assembled & tested, unsplit PCB, CUTU* 169.00 165.00 159.00FLWZM FLW assembled with ZM1350 tubes supplied soon soon soonFLWZCS FLW assembled with ZM1350 tubes & case soon soon soonBURTKD knock-down case for B-7971 tubes soon soon soonFG2K FLW and GKK in twin-pack kit 199.00 190.00 184.00FLUP GeekKlok Firmware Upgrade (update to V5-3) 12.00 12.00 12.00* CDTU available as special order with FLWCL, please request CDTU when ordering
(note: FLWCL supplied on new PCB whose front to back dimension is slightly greater than the old PCB)We use SWREG for secure-server online payments. Legally they are our reseller, but items are shipped directly from our location.
You may pay with any of several credit cards, including Verified by Visa and MasterCard Secure, and PayPal.Products are shipped from Indonesia by FedEx. Shipping charges are US$21.00 for North America, $24.00 for W. Europe and $16.00 for Australia and New Zealand. For other country rates, contact us. Shipping prices have not increased in over three years despite new rates and fuel surcharges.
Buy the Four Letter Word from our reseller, SWREG.
SWREG uses secure servers to process your order. We never see or record your credit card number or other personal information. SWREG meets the highest standards for online e-business transactions.Order NOW from our Shopping Cart
To get on waiting list send e-mail to
wai-tin-glist@(our domain)EU Customers Note: SWREG collects VAT for electronically distributed products, but not for physical goods. You will not be charged EU VAT for your purchase. If you are charged VAT it will be refunded. You will have to pay VAT later when the item passes through customs. This avoids paying VAT two times.
"It is fantastic, you did a really nice job. One of the most entertaining 'toys' I've seen in years." -- G.K., Houston, TX
"I just can't keep my eyes off of it." -- J.M., Columbia, SC
" I completed my FLW last night....Works great!!! Pat yourself on the back from me....you did a great job on this design. " -- M.W., Washington, MO
"It's a fun little device !" -- T. McN., Northfield, NJ
"I got my new toy today, and it is AWESOME. VERY VERY nice." -- A.M., New York, NY
"I must let you know I am very impressed with your efforts on this kit!" -- J. M., Columbia, SC
"Everyone's really excited about it! It is really fantastic!" -- A.E. , Los Angeles, CA
Who is Raymond Weisling? He is the principal owner of Zetalink Technology in Indonesia, a graduate of California Institute of the Arts (B.FA and M.FA), composer, artist, wordsmith, electronics engineer, musician---a Jack of all Trades, Master of Fun. Studied music and sculpture with Barney Childs, Morton Subotnick, James Tenney, Stephan von Huene. Played orchestral tuba at a professional level for a few years, mastered Morse Code and has held amateur radio licenses WA9FUH, KF6HH and YB2ARH. Worked in electronics industry starting in 1965, and was Chief Design Engineer for a U.S. manufacturer of health care signalling products. The music of Java---the Gamelan---drew him to Java in 1980 where he now lives and works---and masters fun.
Page updated 20 May 2004.

(c) Copyright 2002 PT. Zetalink Technology Indonesia