Category Archives: ham radio

The MIZUHO QP-7

2008/07/17                                     日本語は下の方にあります。   “The MIZUHO QP-7”   The Mizuho QP-7 is a QRP transmitter kit which was sold in Japan.   I bought it in Tokyo about 6 or 7 years ago.  The Mizuho QP-7 was popular among the Japanese QRP … Continue reading

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“Visiting Akihabara, Tokyo”

2008/06/22                                     日本語は下の方にあります。   “Visiting Akihabara, Tokyo”   I visited Tokyo for two weeks from May 28 to June 10, 2008.   I would like to write my comments of my trip to Akihabara, Tokyo here. I was born in Tokyo and … Continue reading

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The SW-20 TEST QSO

2008/04/02 “The QSO with N0TU”   The SW-20 CW QRP transceiver was completed in early March.  As usual, I tried to make QSOs for testing to confirm that the Sw-20 has been completed and functioning.   It was poor condx for … Continue reading

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“The SW-20, Small Wonder Labs”

2008/03/15 “The SW-20, Small Wonder Labs”                    日本語は下の方にあります。   The SW-20 is a CW QRP transceiver kit I built in my 2007 to 2008 winter project.  I built the SW-40 (40m band CW QRP) in my previous winter project and it … Continue reading

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W9TFC brass key

2008/03/03                    日本語は下のほうにあります。   “ The W9TFC brass key”   I have made my first QSO with W9TFC, John, on Oct. 9, 2006 on 40m band CW.  During the QSO, I came across that he had a rig using a 2E26 tube … Continue reading

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A 6 to 1 Balun for Meissener Signal Shifter EX

2008/02/20                            日本語は下のほうにあります。 “The 6 to 1 balun for the Meissener Signal Shifter, (MSS)”      I finally operated the MSS with a homebrew 6 to 1 balun.  The MSS has a 300 ohm impedance antenna terminal and my antenna system has … Continue reading

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“ GRC-109, Spy Radio, 1960s”

2008/02/02                                         日本語は下の方にあります。   “ GRC-109, Spy Radio, 1960s”   The GRC-109 radio was designed perhaps in 1950s and manufactured in 1960s.  It is a military transmitter, receiver and power supply as a set.  It has a lot of interesting histories … Continue reading

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