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JO7NFR Japan flag Japan

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JO7NFR since July 2005, its rigs FT5000MP, & TS-590, 1kw L-amp, add SDR PERSEUS receiver,ant. 75/80m 4SQ ph vertical all hand made myself(also quadrature Hybrid network), receiving beverages and other's bands Dipole.

2008年4SQ全部自作構築、約7年間で75・80mミックスで297エンテティコンフアームした。ファイブナイン誌アワードにても   290  を確認済み。 2015.1.16

I THINK WEB SDR DX VERY BAD WAY. 根本を覆す方法で断じて賛成しがたい、私は絶対やらない。

JO7NFR have confirmed QSL cards 75/80m mixed 297 ent. on June. 6. 2015. The 59 DX AWARD have cfmed my QSL cards 75/80mix  290ent.  on  7.3.2014. cw only 270ent.

It's got these cards almost by SASE in several years .I will send to Email my QSL card with excel file from your request.My 4SQ system construt 19.5 meter high vertical 4 pole and every pole set one radial about 19ml 1.5mh(adjust) ,so after 2012 miner change grand radial way could be change any time and way 75m to tuning for 80m using loading coil relay controled. It's built up date on May 2008. This my ant. data had depended on the antennas and techniques book for Low-band DXing writingMr.John Devoldere ON4UN.And also JA1KSJ since 1962 to now (QTH Setagaya Tokyo) but was long term QRT in 1975-2002, and some times would be only here QRV JA1KSJ/M

S47東京田無、JA1KSJ,では、2EL QUAD10/15/20m,FTDX401,その後長期にQRT,2002年より郷里の実家猪苗代で再開。JARLは昨年退会

Editor JO7NFR  Front view is west toward. You can find out roof style up picture changed.

4SQ  since May 2008.   80/75m 4 vertical ant.phased  array.


June 2014 .TS-590 and FT-1000mp.     Now FT-5000.under photo.

This  room had rebuilt Aug 2012 . now nothing.この部屋は改修したので現在はなし、リニアアンプは別部屋。

Now 4SQ quadrature Hybrid network made imp’36Ω, put radial 20 pcs every poles on the ground

20pcs radial  every pole look at wire , and length set about 12meters. TT80pcs plus severl.

It's put radially on the ground.




my voice 100-3000Hz monitor zoom LSB,FT-1000MP MARK-V Class A.


T200x2 HB network 36Ω    noproblem  1kw dummy power test. ph 0-90 deg. ok cheched.Every pole  feed coax are 50Ω foam.

T200x3 ph.0 to180 degree & D-RL

59 DX AWARD   75/80 MIX 290E, CW only 270E. confirmed.

It's my the most rare QSL cards sure 80m band.  TNX.

  VP9  is the most difficult ent. from JA.

This QSO was  the first JA on 80m CW. 

Nealy QSL cards 80m CW only, please QRV ped.plan nonactive entities.

Latest confiremed QSL cards. 二ユーゲット効率が極めて悪い、ペディション歓迎。

I tried 40m 5A special only one year, it’s no good wind,  top 22m high , FB15db, FS20db  ra Γmatch ref stub match.


It's got fantastic  new entities  QSO.

It  was at  Okinawa trip  with  my  XYL  Mar.2014.

It was 1970 at Tokyo Tanashishi city QRV with 2EL CQ 20/15/10m ant. JA1KSJ.

I have lots of things to do,in order to get more new entitiy , I need much time but have no time,I expect to get DX pedisyon new one.

Add. I got TY1AA  80 CW (got FB card tnx)and  FT4TA 80 CW  new ent.

FT1000MP M-V sold。                                               2014.Oct.31. added FT5000MP      


also same date, 4SQ direction rely switch rebuilt ,its set more low space capacitiy, going up signal  retio FB before its.


New coil  had good result that I got FB 24dB to exchange these two ciols .


I   got 80m CW  K1N   Feb.4. Z08  2015. 更に逆Vダイポールで40m CW ゲットした。

Ladder feeder for 40m DP, made 5CFB.    7メガDP用ハシゴフィーダー5CFBで自作、エレメントも同じ。

I got new entitiy cards,  80m CW  tt 297 .


 Photo was Mar.30.2015, I’m  69 yaers old.


 66KV/6KV  7,500KVA×2  for   plant .




Last modified  Oct.2nd. 2015





6750405 Last modified: 2015-10-02 02:40:47, 13879 bytes

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