MenuMaker produced RA3WDK
 AU 144
MHz
 ES 144
MHz
 MUF today
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HamQTH
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Hi,
I'm Ivan Shor RA3WDK !
This page
about my hobby : Amateur
Radio
Well, but what about
my next hobbies? - Sail, of course.
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 Low
Noise Preamplifier for 6m Band
Log-Periodic Antenna 250MHz-7000MHz with Load Coil
Dipole elements
 
LNA
5760 NE3210
Two
CW filters to TS-570 ???
Look here my new idea ! Noise tester for test
HF-VHF transceivers.
You need only connect 9V battery to Noise Tester
in PL-259 connector and you see in S-metr S 6-7 from 160 to 2 meters
!
Making new Preamp for Quad-directional
Flag with optional filter
Review "New Old" Cavity LNA with MGF1303
 
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
 
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
 
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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
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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....
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Smart
Automatic
Antenna Tuner for portable QRV
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Magic
QRP SWR Bridge
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Easy
modification AM broadcast receiver
VEF-202
After
modification ...
 Air
40m band Air
17m band
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QRP
CW Transceiver
+ Modification + CW
filter
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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
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This bug want to help us in Field Day
Just
see more about.....
  
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VHF
: UHF : SHF Cluster __
New
awards has arrived
DX
QSLs has arrived
Zone #3 WAZ on 80m !
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