Note: I no longer own an Index Labs QRP Plus, having sold it in September, 2008 to
help fund the purchase of an Elecraft K2. This page about the QRP Plus will remain active for
From the manual:
The QRP PLUS is a compact low power transceiver with the features and
performance you expect in a modern full size transceiver.
- All band Operation 160M through 10M
- General Coverage Receiver 1.8MHz to 29.7 MHz
- 20 Memories Can Be Set to Any Frequency in the Operating Range
- Provision for Efficient Split Operation
- High Performance SCAF Digital Filters Variable from 100Hz to 2400Hz
- Single Sideband and Full Break-in CW Operation
- Built-in Iambic Keyer
- Very Low Power Consumption on Receive
- SSB and full break-in CW
- adjustable transmit power from 0 to over 5 watts
- covers all ham bands from 160 meters to 10 meters
- general coverage receiver
- built-in iambic keyer
- variable (100 Hz to 2.4 kHz) SCAF audio filter
- RIT and split transceive operation
- switchable 20dB attenuator
- relatively low current requirement: 150 mA on receive
Index Laboratories offered two versions of the QRP Plus: the original QRP Plus, and the later
Improved QRP Plus. The latter utilized a custom-designed mixer in the receiver and promised
improved receiver performance. (Sadly, the Improved QRP Plus did not quite meet expectations.)
Index Labs also offered an accessory, the QRP Companion, which contained in a cabinet the same
size and shape as that of the QRP Plus, an antenna tuner, a noise bridge for use in tuning an
antenna, and a gel-cell battery with charger.
Index Labs no longer offers amateur radio equipment and does not service the QRP Plus or QRP Companion.
My QRP Plus, serial number #0719, was an original version with a Revision 03
EPROM and was un-modified. It was my primary portable HF transceiver. The QRP Plus is
small and rugged, has a nice feature mix and an excellent user interface, and while
its receiver performance isn't that of a competition-grade transceiver, the little
rig served me well in the field.
Manual: I have scanned the manual of the original version of the QRP Plus and have
made it available as a 2.5 megabyte zip file
and a 2.4 megabyte PDF file.
Articles: I have collected articles from QRP-L and other sources on the QRP Plus:
QRP Plus Links:
Larry East, W1HUE
, has written a series of articles on QRP Plus modifications for the QRP ARCI's QRP Quarterly
; these articles and manuals for the original QRP Plus, the Improved QRP Plus, and QRP Companion, are now available on Larry's site.
has possession of most of the remaining QRP Plus parts and documentation.
Emtech maintains an email reflector/forum for the QRP Plus here
QRP Plus Users' Group
on Yahoo! Groups
Mark Peterson, WF7M, (email
) has new-old-stock cabinet sets for the QRP Plus available for sale.
Attributions: Advertisements scanned from original documents.