Amateur radio station since 1993

RA3WDK `s Homepage


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Status AU 144 MHz

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Status MUF today

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from AIR



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Hi, I'm Ivan Shor !

This page about my hobby : Amateur Radio

on the HF, VHF , UHF , SHF band.

Well, but what about my next hobbies? - Sail, of course.

Field Day 2014, 5-6 Jule

I participated in the competition of home location in group SOMB with 5 band : 144 . 432 . 1296 . 5760 . 10368 MHz

SHF day , Russian Championship on VHF, UHF , SHF band

7-8 June 2014

Video of QSO UT0LWW<>RA3WDK on 6 cm by UR4LBL

New Designs & Articles

2 Time delay SEQUENCER, now with USB !

Dual band FeedHorn for 1296 and 5760 MHz

Pipe Cap Filters for 6 cm and 3 cm

New elements LC for expand band of tune in Smart Automatic Antenna tuner

The Lightning Protection for Rotors

If you want to buy assembled and tested board please look at K6VHF`s info here

Download description of LPR

New Magic QRP SWR Bridge v.3

If you want to buy KIT of Magic Bridge or assembled and tested board please look at K6VHF`s info here


If you want to use your old HF tranceiver in VHF in EME or MS QSO - you must increase stability of frequency. For example - i use my old IC745 with my 144/28 XVTR . I have good total value of frequency stability for long sending cycle without TXCO. You need only some a bit of polypropylene for VCO, 2nd LO and LO.

In old tranceivers often was problem with switchknobs XIT/RIT.

Good idea is - to use old switchknobs XIT/RIT for control of good relay. Now only clear of relay ladder with good contact will be control XIT/RIT . For example - i use russian relay RES-49 in easy layout !


Smart Automatic Antenna Tuner for portable QRV


Magic QRP SWR Bridge

Easy modification AM broadcast receiver


After modification ... Air 40m band Air 17m band


QRP CW Transceiver

+ Modification + CW filter


USB Power Metr

Measure power from 10 MHz to 12 GHz !

HAMs who owns this Power Meter :



This bug want to help us in Field Day

Just see more about.....


ODX via MS in Perseids shows

G4CDN JO02ss<MS>KO81br RA3WDK about 2340 km

Richard G4CDN made screenshot our QSO, let see more info in


VHF : UHF : SHF Cluster __

SK6AW DxSummit F5LEN





5760 MHz 587 km TROPO




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