ISLEKEYR.TXT - an information file on the Island Keyer kit.


Let's look at the features:

- low cost, $5 for the keyer chip, $21.95 for the semi-kit (add $2 for shipping in US)
- uses the Motorola MC68HC705J1A microcontroller (20 pin DIP package)
- Iambic keying (mode B)
- 4 pushbutton selected memories (120 characters each - nonvolatile EEPROM)
- sidetone variable from approx. 400 hz to 1200 hz
- Straight key input
- a speed readout switch, code speed in WPM sent through sidetone
- code speed set via potentiometer, variable from 7 to 48 WPM
- kill button (reset switch) to stop message transmission
- low standby power consumption (about 3 ua at 3 V, without regulator)
- small size (circuit board is 1.5 by 2 inches - Altoidsable?, Sucretable?)
- double sided, fiberglass circuit board with plated through holes
- keyer can be operated without memory for even lower power and fewer switches
- Radio Frequency Interference generated by the keyer is very low

However, while we're at it, let's list some of the disadvantages:

- no weight control
- no auto spacing
- no auto serial number stuff or other contest features
- no fancy memory stuff (editing, pausing, calling other memories, etc.)
- lack of editing can make loading the memories perfectly a challenge
- no major additional features possible since the EPROM is full
- the speed control may require component tweaks for full speed range
- the speed readout is approximate
- assembly may be challenging due to a small and crowded PCB, no solder mask
- the documentation is still fairly rough, don't expect Heathkit quality doc.

So why buy this keyer? It's low cost and decent feature set should suit the
more casual, under 20 WPM CW operators like myself. If you just want a gizmo
to automate the sending of the old 3 by 3 CQ from your QRP rig, this is it!
I built it for the memory keying and for something more reliable than my
previous keyer.

The kit includes the following items:

- documentation including parts list, schematic, circuit board foil and layout diagrams
- assembly and operation instructions
- circuit board
- programmed MC68HC705J1A microcontroller (keyer chip)
- 93LC66 EEPROM memory chip
- 8 and 20 pin sockets
- 2 mhz ceramic resonator
- 5V regulator
- 2 transistors
- and all board mounted resistors, capacitors and diodes

ALSO included - If you send a typed copy (or email) of your 4 messages
with your kit order they will be programmed into the EEPROM memory at
no extra charge. Include your favorite sidetone frequency and it will
also be programmed into the EEPROM.

Here is a suggested list of items needed to complete the kit:

- enclosure
- 7 normally open momentary switches
(4 switches for memory)
(1 speed switch)
(1 INT / record switch)
(1 reset / kill switch)
- jacks for key, paddle, power (if not using batteries) and transmitter
- if using battery power - battery holder (2 or 3 AA cells)
- 1 meg ohm linear potentiometer for speed control
- 1 k ohm pot for volume control (or I just use a 330 ohm resistor)
- speaker for sidetone
- 14 pins of snapable machined pin SIP sockets (optional)
- switches for power and keying line (both optional)


Pricing -

Keyer Chip, $5 (includes schematic, parts list, construction and operation info)
Chip + circuit board, $13
semi kit, $21.95 (includes chip, board, EEPROM and all other board mounted parts)

shipping in USA, $2 (DXers: please inquire to jacksonharbor@worldnet.att.net
for shipping rates outside the USA).

Wisconsin residents add 5.5% sales tax.


Ordering information:

Make checks payable to: Jackson Harbor Press.

Include your email address if you want an order confirming message.

Include a typed copy (or email) your 4 messages and sidetone frequency if you want them pre-programmed into the EEPROM.

All orders will ship via First Class mail.


Mail your order to:

Jackson Harbor Press
N21W1418 Foss Road
RR1, Box 91C
Washington Island, WI 54246-9718


Thanks for your interest.