• From The DXrobot

AU 144 MHz

ES 144 MHz

From MMMonVHF

MUF today

Map Tropo Forecasts

* < MS Propogate > *

RF Calculators

My MP3 collection

from AIR

Web SDR

CW Skimmer Server

HamQTH

Hi, I'm Ivan Shor ! This page about my hobby : Amateur Radio Well, but what about my next hobbies? - Sail, of course.

DXCC Challenge 2000 and sticker #315 for DXCC has arrived !

Review "New Old" Cavity LNA with MGF1303

 

I improved my RX system for winter season 160/80 m.... look more info here

PreAmplifier for my 160/80m Bi-Directional Flag , for receiving I use TS-830 and Afedri SDR

 

How to make a tubes tester for 6146B / S2001A

Repair and modification LNA 144 MHz with SPF5189z

 

My new ANTENNA Five-Bander (20m 17m 15m 12m 10m)

First QSO`s on 17 m : JA4DNC,VO1MP, MI6GTY, J68HZ ....

 

 

Digital Recirder with two message + switch for Mic and Digital mode

 

2-way PTT Sequencer now available with options

 

DXCC Challenge and 5BDXCC + WARC has arrived !

New project LNA 5,4-5,8 GHz

LNA 5,6-5,8 GHz with EPB018A5, more info here

 

New design of LNA for 1296 MHz , ATF54143, 50 mA Nf ~0,55db

USB Power Meter

Measure power from 10 MHz to 12 GHz !

 

My new Designs & Articles :

High IP3 LNA 144 MHz with two channel output

"Gold edition"

Experimental Tri Band yagi for 14/21/28 MHz Bands

 

Second CW filter in 1st IF of TS-830

 

Mods. TS-830	Low Band Ant	Dual Band Horn	Mods. PA R-140	2 way Sequencer
Mods. circulator CD150-B for amateur 2 m band	RF voltmeter & Dummy Load	CW electronic key	Collection of Awards	Amateur SAT transponders
TriBander 14/21/28

 

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....
NF measurement
Horns for 5,7 / 10 / 24 GHz	Smart Automatic Antenna Tuner for portable QRV
High dynamic range XVTR Front-End	High IP3 LNA for 1296 MHz with BPF
Power supply "POWER ICE 30A"	LNA for 144 MHz/ Avia Band & FM BC with SPF5189Z by RF Micro Devices
COMPARING DIFFERENT LNA of 144 MHz Band For Use in Noisy City
Magic QRP SWR Bridge	Easy modification AM broadcast receiver 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
UpXVTR 120-210 MHz for NWT-7	Broadband Electromagnetic Field Finder & Field Strength Meter
10 MHz Rubidium Frequency Reference	Oscilloscope analyzer SWR & S21 parameter

 

This bug want to help us in Field Day

Just see more about.....

 

VHF : UHF : SHF Cluster __

New awards has arrived

DX QSLs has arrived

Zone #3 WAZ on 80m !

You can send me FeedBack or Sked

This website is Copyright © 2008-2009 author/webmaster : RA3WDK