JN3DMJ's Website of QRP and Homebrew Transceivers

Access counter since Sep. 9, 2001. Japanese page is here.

English top page : Aug. 6, 2011
English last update : Aug. 4, 2019

Sunset in Saikazaki, Wakayama

Welcome to my website of QRP and homebrew transceivers.
JN3DMJ is a QRP station. All QSOs are operated with 5 watts of RF output or less.
My main interests are QRP, DX, contesting, homebrewing transceivers / transmitters and digital modes -- JT65, PSK31, PSK63, RTTY.
I achieved the ARRL's QRP DXCC and the traditional DXCC.

QSL information : Bureau or Direct(SAE+1IRC). My postal address is indicated on the QRZ.COM.
All logs of my DX QSOs are uploaded to the ARRL's LoTW and the eQSL.cc(Authenticity Guaranteed).
All logs of my domestic QSOs from home station are also uploaded.

You can see realtime propagation monitor of JT65 at PSKR ( PSK Reporter ) and RB ( Reverse Beacon ) Network.

INDEX

Please click the image or the title on the table.
Excuse me. Most of my pages are written in Japanese.
Sitemap is here (Japanese).

General
	QRP operation (Japanese)		My antennas (English)
	Domestic contests (Japanese)		International contests (Japanese)
Homebrew FM transceivers ( 2009 - 2017 )
	70cm FM transceiver (Japanese)		6m FM transceiver Zero-1000-51 (Japanese)
	2m FM transceiver RX-2/TX-1 (Japanese)
Homebrew DSB transceivers ( 2011 - 2016 )
	JARL QRP CLUB 60th anniversary 15m DSB/CW transceiver JA Pepper 60 (Japanese)		6m DSB/AM/CW micro watt transceiver PAV-6 (Japanese)
	6m DSB transceiver Pokeroku (Japanese)
Homebrew CW transceivers / transmitters ( 2009 - 2016 )
	15m CW transceiver MFJ-9315K (English)		80m CW transceiver MFJ-9380K (English)
	20m CW transceiver SW-20+ (English)		2m CW transmitter CW-TX-2 (Japanese)
	80m CW transmitter CW-TX-80 (Japanese)		15m CW transmitter QP-21R (Japanese)
	6m 2-transistor CW transceiver Two-Tra6 (Japanese)		2200m CW transmitter CW-TX-136RRR (Japanese)
	40m CW transceiver Rock-Mite 40 (English)		40m CW transmitter Sweetfish 40 (Japanese)
	40m CW transceiver SST40 (English)
Homebrew SSB transceivers ( 2001 - 2009 )
	15m SSB transceiver modified TRX-602 (Japanese)		6m SSB transceiver TRX-602 (Japanese)
Homebrew AM transceivers ( 2001 )
	6m AM transceivers (Japanese)
Homebrew using vacuum tubes ( radios and audio amplifiers ) ( 2014 - 2016 )
	Vacuum tube audio amplifier AMP-MINI (Japanese)		Vacuum tube audio amplifier NEW AMP-2 (Japanese)
	Vacuum tube headphone amplifier HP-AMP-1K (Japanese)		3-subminiature tube superheterodyne reflex radio 3SMT-RS (Japanese)
	2-tube regenerative radio 2R-STD-R (Japanese)
Others
	40m SSB/CW receiver SR-7 (Japanese)		Accessories (Partly English)
	Website of Germanium Transistors and Diodes (Japanese)		My profile, etc. (English)

CQ WW DX CW Contest 2012, 2014, 2015, 2016 & 2017
CQ WW DX SSB Contest 2013, 2014, 2015, 2016 & 2017
CQ WW RTTY Contest 2013, 2014, 2015 & 2016
CQ WPX CW Contest 2014, 2015, 2016, 2017 & 2018
CQ WPX SSB Contest 2015
CQ WPX RTTY Contest 2013, 2014 & 2016
I got first place of Japan - Call Area 3 in the single operator QRP all bands category.

2014 RSGB IOTA Contest
I got first place in the Island Fixed Single-operator Unassisted Mixed 24hr QRP section.

Member of JARL.
Member of the JARL QRP CLUB (#650).
Member of the European PSK Club (EPC #17442).

Since Nov. 17, 2011

E-mail :

Copyright (C) 2011-2019 by MATSUMOTO Koichi, JN3DMJ