I am interested in acquiring and preserving old Heathkit computers, including the H-8 and H-11 machines described below. I am also interested in peripherals and documentation, including the H-9 video terminal and the H-10 paper tape reader and punch.

If you have any of this equipment that needs a new home, please send me an e-mail!

The following are advertisments for Heathkit's computer line, scanned from the back covers of circa 1977 Interface Age magazines.

This advertisement appeared on the back cover of the May 1977 issue of Interface Age magazine.

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This 8-bit machine, by itself, is as versatile as a lot of systems that include peripherals

Skeptical? For starters, because of its unique design the H8 is the only machine in its price class that offers full system integration yet, with just 4K of memory and using only its "intelligent" front panel for I/O, may be operated completely without peripherals!

In addition, by using the features of its built-in Pam-8 ROM panel control program, the H8 actually allows you to dig in and examine machine level circuitry.

Responding to simple instructions the "intelligent" panel displays memory and register contents, lets you inspect and alter them even during operation. And for greater understanding, the front panel permits you to execute programs a single instruction at a time. The result is a powerful, flexible learning tool that actually lets you "see" and confirm each detail of H8's inner workings.

If you need further evidence, consider the fact that H8's system orientation allows you an almost unlimited opportunity for growth.

Memory is fully expandable, the 8080A CPU extremely versatile, and with the addition of high speed serial and parallel interfacing you gain the added flexibility of I/O operation with tape, CRT consoles, paper tape reader/punches, and soon floppy disk systems!

The H8 offers superior documentation including complete step-by-step assembly and operation manuals, is backed by 54 years of Heath reliability, and comes complete with BASIC, assembler, editor, and debug software - others charge over $60 for!

H8, simplicity for the beginner, sophistication for the expert and at $375 just right for you.

This advertisement appeared on the back cover of the April 1977 issue of Interface Age magazine.

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a computer can get awfully bored when it can't communicate!

So unless you'd prefer to have your sitting around cooling its chips, we'd strongly suggest you buy a couple of peripherals from Heath.

Why us? Because we make peripheral kits. In fact, they're some of the best around. Our H9 is an excellent example. It's a complete ASCII keyboard/12" CRT terminal that was designed for hobbyists just like you. It has a lot of really great features and resolution that's just beautiful. Right on out to 80 characters per line. (Something most outboard TV monitors won't match!) And with built-in selectable interfacing options, the H9 will "converse" with just about any computer going!

The H10 is another of our "universal" peripheral kits. Completely self-contained (it even has its own power supply), this rugged paper tape reader/punch gives you quick, convenient mass storage and internal tape duplication capability. It's easy to build and, with its heavy-duty stepper motor, sensitive Darlington photo transistors and precision punches, the H10 is a source of reliable data loading and storage -- time after time.

Best of all, priced at $530 and $350 respectively, the H9 and H10 kits cost less than most other comparable peripherals on the market today!

A computer can get awfully bored when it can't communicate. Start communicating with yours through an economical peripheral from Heath!

This advertisement appeared on the back cover of the February 1977 issue of Interface Age magazine.

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the world's most powerful microcomputer comes home

Computer hobbyists have always wanted the power and speed of professional machines. But they've had to settle for less. Professional machines were too expensive. Not anymore. Now there's the Hetahkit H11.

Professional performance, kit price.
The H11 uses Digital Equipment Corporation's 16-bit LSI-11 CPU. Exactly the same CPU as found in the famous DEC PDP-11 - probably the most popular commercial and industrial computer in the world. So now a low-cost kit gives you the speed, power and throughput of the world's most popular professional computer.

Software and support.
As an H11 owner, you have access to an incredible range of software - editor, relocatable assembler, linker, absolute loader, debug program, I/O executive program, dump routines, BASIC and FOCAL. And, by joining the DEC user's group (DECUS), you can have access to one of the largest sfotware libraries in the world. And there's more to come. Much more.

Of course, the H11 executes the powerful PDP 11/40 instruction set which includes over 400 commands. And the fully assembled KD-11F CPU board includes 4K x 16 bits of memory. The backplane accepts up to six additional modules (memory, serial and parallel I/O, etc.)

Heath will soon introduce a dual floppy with a disk operating system to take full advantage of the H11's power. And the H11 is fully compatible with all DEC LSI-11 accessories.

Heath documentation is second to none. You get illustrated step-by-step instructions on how to build the kit, thorough explanations of the software and comprehensive operating instructions. If you want to see for yourself, we'll send you the entire manual set (#HM-1100) for just $25. And you can apply the cost to the price of the computer.

With the Heathkit H11, you can enjoy power, speed, versatility and potential no 8-bit machine can match. And the H11 costs little more than lesser computers - just $1295.

Don't settle for less than the best. A close look in the latest Heathkit catalog will convince you that the H11 is the best home computer you can buy.

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Last updated January 15, 2005