http://www.flex-radio.com/
http://www.vhfdx.de/wsjt/index.html
on July 24, 2003
QRP
I don't have any record of QRP activities, but I like QRP
world.
Even in my ham radio life, I did not have any special
activities on the air over twenty five years. I just took QRT
condition. Since 1995, I had a good opportunity to collect
several information and hardware parts in SiliconValley area,
California. This is a first time to start the homemade
projectsafter starting ham radio.
I will start ham radio activity on the air very soon using my
homemade rigs. If you hear my QRP signal, please contact me.
Embedded
Microcomputer system
My first experience of
microcomputer is TOSHIBA 12bit CPU called TLCS-12family in
1974. Then I used following CPU's for the hobby.
i4004 (Intel), MC6800 (Motorola), MC6802 (Motorola), MC6809 (Motorola),
HD6309C (Hitachi),
CDP1802 (RCA), MC68HC11 (Motorola), HD63701 (Hitachi), Z80(Zilog)
, H8 series (Hitachi),
H8S series (Hitachi), PIC series (Microchip)
I have a "MCS-4 (i4004) MICROCOMPUTER SET USERS MANUAL"
issued on Sep.,1974 Rev.5 Second printing document. If you
have a interest it, please let meknow. I will make a plan to
show in the web in the future.
Currently I am using H8/3048F and PIC16F84. Because they have
a FLASH ROM in the chip, so it is very easy to update
software. Akizuki Denshi Tsusho Ltd. introduce a very cheap
kits both hardware and software (C-compiler,monitor and so on)
for H8/3048F.
.
DSP (Digital
Signal Processor) & DDS (Direct Digital Synthesizer)
I am working the new project that is based on the direct
conversion receiver with DSP and DDS. You can see the
conceptual idea on QST , QEX and related magazines as
followed references.
(1) High-Performace, Single-Signal Direct-Conversion
Receivers
By Rick Campbell, KK7B, QST, January 1993,p32
( You can see same article in "QRP POWER" published
by ARRL (order#5617))
(2) Building a Direct Digital Synthesis VFO
By Curtis Preuss, WB2V, QEX, July 1997,p3
(3) A High-Performance,Single-Signal,Direct-Conversion
Receiver with DSPFiltering
By Rob Frohne, KL7NA, QST, April 1998,p40
My idea is just combine those concepts and projects and controlled by Akizuki
H8 board (AKI-H8). I need more time to develop all of the parts of each
DSP, DDS, H8 software and hardware.
Membership
ARRL
NorCal #1878 ( The Northern California QRP Club )
On June 4, 2003, The NorCal QRP Club and
The New Jersey QRP Club merged to form The American QRP Club.
Please see following Web page.
http://www.amqrp.org/
Experience
I made a germanium radio when I was in
elementary school 5th grade. This was made me a first
interest for my radio and electronically activity. Then I
read the magazine "CQ Ham Radio" that was published
by CQ Publishing Co.,Ltd in Japan. I could not understand all
of contents at the beginning. But I understood that there are
persons who can operate both transmitter and receiver and
communicate with others all over the world. I decided to get
the amateur radio license.
I made my first transmitter for 6 meters in 1969.
1968 Got Class 4 (Phone Class) license
1968 Started the Amateur Radio Station JH1PJL
1969 Completed 6m Rig
1973 Got Class 2 license
1974 Made a 30mW AM TX for 6m
1974 Made a 144MHz linear Amp. using 4CX250B tube
1975/12 Introduced "Electric Memory Keyer" on CQ
HAM Radio magazine in Japan
1975 - 1999 QRT
My first rig on the air
How to made this rig
When I was sixteen years old and 1st grade of the high school,
I had started this project. I just followed the article that
I don't remember who is an author and which magazine of the
article. I spent a lot of time to find the way to finish, but
I could not reach it, just spent a time. Because I did not
have any knowledge and tools to find out it. I only had an
analog tester.
Then I started to find an OM in a local community to get a
suggestion. I met JA1NUX who was a student of a university at
the time. He gave me several advise and pointed out the
problem that I could not find. That was very simple that each
stage of the output resonance circuit and final tank circuit
were totally different values. So he remade and adjusted each
circuit. Finally my first TX worked fine and gave me several
communications on 6 m band included overseas QSO with several
VK stations.
Home
made rigs and equipments
An Optimized QRP Transceiver for 7MHz
A Small High-Performance CW Transceiver
Bilateral 50MHz QRPp Transceiver
Forty-9er (49er) (NorCal project)
38 special (NorCal Kit)
SST (It is not kit version)
PIXIE 2
DDS (Direct Digital Synthesizer)
Electric Keyer
NorCal Paddle
Return Loss Bridge
Sweep Generator
Capacitance Meter (Two type of Akizuki kit)
Dip Meter
Frequency Counter (Akizuki kit)
Direct Conversion Receiver with DDS and DSP
Equipments
Equipment
|
Type
|
Maker
|
Function
|
| Selective Level Meter |
3586C |
HP |
From Audio to 30MHz |
| Signal Generator |
Model3004 |
Wavetek |
From 1KHz to 520MHz, 0.1uV to 1V |
| Signal Generator |
Type191 |
Tektronix |
From 50KHz to 100MHz, 5mV to 5V |
| Audio Generator |
105-2002 |
Global Specialties |
From 0.1Hz to 1MHz,Sin,Sq,Saw |
| Freq. Counter |
5381A |
HP |
80MHz |
| Oscilloscope |
1725A |
HP |
275MHz, 2CH, 0.01 to 5V |
| DMM |
506 |
Protek |
LCR,V,I,Temp.,True RMS, PC control |
| Dip Meter |
AN/PRM-10 |
Traffet Radio&TV |
From 5MHz to 400MHz |
| Dip Meter |
HA11 |
DELICA |
From 1.3MHz to 150MHz |
| SWR Analyzer |
259B |
MFJ |
From 1.8MHz to 170MHz |
| Dummy Load |
8135 |
BIRD |
150W 50ohm |
I
have old books
Amature
Radio
Microcomputer
My
working space
My Interest Area
