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Сайт RA3WDK

 

 

 

MenuMaker produced RA3WDK

Status AU 144 MHz

Status ES 144 MHz

From MMMonVHF

Status MUF today

Map Tropo Forecasts

* < 160m Propogate > *

RF Calculators

 

My MP3 collection

from AIR

Web SDR

 

CW Skimmer Server

HamQTH

 

 

160м DXing Двухтоновый генератор 14 MHz

Фазовые подавители помех

Доработка усилителя KL203

KL203

Широкополосная активная рамочная магнитная антенна

WALA
WALA

 

Эскиз 5-Band Yagi 2el 14 MHz, 2el 18MHz, 2el 21 MHz, 2el 24 MHz, 3el 28 MHz

 

Предусилитель 144 МГц SPF5189z + BPF, защита от статики и мощности по выходу

 

Логопериодик 250MHz-7000MHz с удлинением элементов индуктивностями

LNA 5760 NE3210

Два CW фильтра в TS-570

PreAmpAD8129

 

Генератор шума в разъеме

PreAmpAD8129 PreAmpAD8129

PreAmpAD8129

PreAmpAD8129

Предусилитель-коммутатор для двух ортогональных флагов

PreAmpAD8129

PreAmpAD8129

Yagi 5 Band + Load Coil Dipole 30m

МШУ с резонатором (MGF1303)

Простой тестер ламп 6146B / S2001A

МШУ 144 MHz SPF5189z

 

Цифровой магнитофон для трансивера + переключатель Mic-Digital

 

2-way PTT СЕКВЕНСОР

 

МШУ 5,6-5,8 GHz ( EPB018A5 )

 

МШУ 1296 MHz , ATF54143, 50 mA Nf ~0,55db

USB СВЧ измеритель мощности до 12 ГГц

Measure power from 10 MHz to 12 GHz !

 

Второй CW фильтр по 1 ПЧ в TS-830

 

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 !

Repairing old potentiometers

 The change of original components when restoring old radio or transceiver sets is always an unpleasant. In the case of potentiometers it is difficult to find double original potentiometers for RF/AF or Mic/RF PWR.

 If you hear rustling in old potentiometers of your old transceivers you need repair them with oil. My practice is to use syringe with solid oil + spirit. Usually I use russian solid oil ÖÈÀÒÈÌ-203 (ÃÎÑÒ8773-73) . You can use SIMNIA 0, PETROLEUM JELLY S68OO,Mobiltemp SHC 100, AEROSHELL 15A or or good quality machine oil.

 You don`t must to open potentiometers, you must only press out some oil with spirit into potentiometers. You must to turn the potentiometer minimum 20 times from end to end. The solid oil hits to center contact and will protect contact near axis.
 This technique is very effective and, usually, these potentiometers will still perfectly efficient. But i know what in 5% of cases where the resistive surface has been damaged and way with repair potentiometer by oil does`t work. More info you can look here....

Smart Automatic Antenna Tuner for portable QRV

 

Magic QRP SWR Bridge

 

2 гетеродин и пьезофильтр в VEF-202

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

 

QRP CW Transceiver

+ Modification + CW filter

 

USB Power Meter

Measure power from 10 MHz to 12 GHz !

HAMs who owns this Power Meter :

RW3AZ, RZ4HD, UA3DHC, R6DZ, RA9YMI, UZ5DU, US3IET, RA9FOR, RT5D, RA0LDP, RT8B

 

This bug want to help us in Field Day

Just see more about.....

 

JH7VHZ

Ионограмма

Solar Wind

foE, foF1 и foF2 - критические частоты ионизированных слоев E, F1, F2 для обыкновенного компонента волны

fxE, fxF1 и fxF2 - критические частоты ионизированных слоев E, F1, F2 для необыкновенного (eXtraordinary) компонента волны

 

VHF : UHF : SHF Cluster __

SK6AW DxSummit F5LEN
144
432
1296
2,4G
5.7G
10G

Дипломы

 

DX QSL пришли...

Zone #3 WAZ on 80m !

 

 

 

 

 

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