QRP Rigs
An
Optimized QRP Transceiver for 7MHz
Forty-9er
(49er) (NorCal project)
SST
(It is not a kit version)
38 special (NorCal Kit)
PIXIE 2
Updated on
January 11, 2004
An Optimized QRP Transceiver for 7MHz
This 7MHz CW Transceiver is based on
following article. I made the TRX in 1995.
An Optimized QRP Transceiver for 7MHz
QRP
CLASSIC （Page 119, ISBN: 0-87259-316-9)
ARRL
FIRST EDITION (1992 2nd printing)
（The book is already out of print. You can see in
Amazon.com)
The above article was from 1993/ARRL Handbook Chapter 30 Page
37 and original article was in follows.
An Optimized QRP Transceiver for 7MHz
Roy
Lewallen W7EL, QST August,1980
Interest point is VFO which is used Hartley circuit and keep
good stability like less than 200Hz warm-up dirt. There are
several guideline to achive those dift characterristic, e.g.
"Anneal a troidal coil" by water boiling.
You can see my result for warm-up drift
performance as in here.
Forty-9er (49er) (NorCal project)
This CW Transceiver is introduced in QRPp which is a journal
of the Northen California QRP Club (NorCal) in 1996. Then
NorCal introduced the TRX kit.
This TRX is designed by Wayne Burdick, N6KR
for 40 meter(7MHz) and 9V battery operation. Name became from
famous professional footbal team San
Francisco 49ers.
The circuit is very simple for Mixer (at
RX) and OSC(at TX) using one NE602 for both purpose.
SST
(It is not a kit version)
The SST was introduced in QRPp as follows.
The SST: A Simple Superhet
Transceiver For 40 Through 20 Meters
by Wayne A. Burdick,
N6KR
QRPp
Volume V, Number1 Spring 1997
Journal
of the Northen California QRP Club
You can see my
circuit which is modified slightly.
TRX is super heterodyne type and IF is 4MHz
with three Xtal ladder filter.
Kit is avairable not from NorCal but from Wilderness Radio as
"The SST Kit".
38
special (NorCal Kit)
The 38 Special is in QRPp as below.
The ”38
Special" Transceiver
by Ori Mizrahi-Shalom,
AC6AN
QRPp
Volume IV, Number4 December 1996
Journal
of the Northen California QRP Club
The 38 Special is based on 49er and
modified for 30 meter and 8V battery operation. One of an
improvement point is RX performace for weak signal. The
circuit is very simple using some IC's not only analog IC but
also "Digital IC's", e.g. 74HC240 for TX power
stage and CD4066 for TRX function change.
You can see cover sheet of kit manual as here and recognize a gun. Yes, 38 Special is a
revolver (picture is TAURUS).
PIXIE 2
I bought PIXIE 2 at HSC in Silicon
Valley. You can see related informtion in following Web page.
QRPp International
http://www.qrpp-i.com/pixie2.htm