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Vintage Kenwood TS-940s AT c1985. Updated, Serviced and online!

I am a Volunteer Examiner for all FCC licenses, Amateur & Commercial --

I also hold an FCC General Radiotelephone w/RADAR endorsement (Elements 1,3,8)

Visit our Exam site at  http://HamRadioExamsNY.com/ 

IF YOU HEAR SOMETHING, SAY SOMETHING!

THAT's How RADIO WORKS!

It takes 2 people for a QSO.

Be one of them!


Be Careful ---- RF burnz...

Solarcon IMAX 2000 10-17M Vertical up 40ft.... wow nice.. 

 

INV "L" (ANT#6)  148ft long - 60ft VERTICAL - then 90FT Horizontal at 60'FT level. 

ALL EFEDS USE 9:1 5kw BALUN. 

EFED SLOPER (#3) is 58' long, top is 39ft high. 

EFED Half Square (#4)  is 124.5 FT long 40' up/50ft horiz/40' down

Optimized G5RV (#5) Flat top at 65ft (14 Meters) high

Quad/Loop is fed with 4:1 Balun at 09:00 position.  EATEN BY SQUIRRELS! - RETIRED

 

SWR IS IN RED - Mostly under 2:1 - Tunable with just a radio tuner

 

 

RETIRED.... This antenna is now gone.... 15M loop removed. It worked, but I had to move the G5RV up, so it came down. 

SWR IS IN RED -- nice huh? 

=====================================================

Decided to build a DELTA LOOP for 20M because I had some left over parts.... 

75FT of wire/4:1 UNUN loop balun/some rope, and coax 

Here is my newest creation 

===========

 

RF BURNZ - PLEASE USE QUALITY RF CONNECTORS

CENTER INSULATOR ARCd

I call it a "Carbonarc"

NEW VS OLD SO239 DBL BARREL

This connector was on my 80M INV "V" dipole. 

SYMPTOMS? - Antenna performance on receive was steadily declining. I thought the bands were just getting quieter. You know how it is, but when my SWR meter was going CRAZY from 1.2:1 up to 5:1 !! and then back. Something was wrong. I dropped the antenna, cleaned up contacts. REPLACED these connectors. I should have detected the 'DECREASE in RECEIVE' performance sooner. LESSON: your gut is right. 

 

FAILED DIPOLE INSULATOR - LESSON LEARNED - CHECK YOUR ANTENNAS ALL THE TIME! 

JUST BECAUSE ITS UP THERE and WORKED, DOESN'T MEAN ITS STILL WORKING

Failed Dipole Insulator

Everyone uses these insulators for just about any dipole you could build. Well I use them as too.  I built a 40M dipole last year, and it was not working as it should for the last month. (Aug 2015). So,  I connected my antenna analyzer and it was showing that the antenna phase angle was 87deg, then 104deg, then 175deg, and was changing based on the WIND and temperature. The phase angle and SWR were changing as I watched the antenna analyzer. Not good.

Took the antenna down, got my ohmmeter, and checked the continuity between the antenna ground and the brass screw.   NOTHING. No Continuity. 

Got the drill, and carefully poked some holes, the THERE IT WAS. The solder joint failed. The single brass screw is soldered to the wire lug inside the unit. As you can see, the joint failed, either cold solder, or who knows what. It failed SLOWLY. NO, I wasn't running a kilowatt! At most, 100w from the radio itself.  

 


Again... Be Careful ---- RF burnz...

This is the back of my TUNER. It has those WINGNUTZ on the back for balanced/ladder line. Remember, when tuning/transmitting those are open connections with VOLTAGE.  That's a wire for my external speaker to my TS2000 radio. It got too close to the wingnut and ARC'd right thru the insulation. 

Lesson Learned: Don't take for granted those connections because they carry HIGH VOLTAGE when transmitting. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BELOW - 20M Dipole homebrew attached to wooden stockade fence, 5ft UP ! 1.02:1 SWR - you can't see the SWR meter move, unless its a 4" meter face. Look at the graphs below, no one believes this works. 

ANTENNA MODELING and MATHMATICS IS THE START, NOT A SCIENCE. No modeling program can predict this result.

My new MOTTO - JUST BUILD IT! - If it doesnt work, build another, stop when it works.  

In the flowerbed, I laid 8x coax along fence to shack. Approx 65'.

Sadly, this antenna is now retired. It had served me well over a year with literally scraps from my workbench. 

SWR IS IN RED 

    

This is how it's TUNED! - Move THE BUNGEE in the fence slats to 

adjust the lenght. When done, tywrap it! 

My homebrew 40M Dipole inverted-lazy V was talking to Europe everyday when band permitz, is now retired.

I took it down, it was 16Ft high (5 meters) (that's it) - it's in the treez....see how stealthy!

And this needs a little tuning as you can see below. Need to raise the ends to compensate. Will open up the SWR bandwidth when I do. Very small SWR window here, but VERY tunable on the band. 

SWR IS IN RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HERE's the HALF SQUARE - END FED 9:1 Balun (ANT #4) 

WHAT KIND OF MIC IS THAT ON YOUR KENWOOD?

AMPS NEED LOVE TOO !!!  

2014 like-New Ameritron 811H - 

(4) new 811 Tubez - makes a difference. That's an antenna, not a dummy load. See the SWR.. it's into an antenna.. 

OMG.. people have actually asked me if that meter reading was done while the cover was off the AMP!.. NEVER EVER operate an AMP with the cover off. 

===========================

Everyday radio is a TS-2000 - great radio! Sitting next to the TS2000 is my TS940, a fantastic radio for over 32yrs.

=========================================

SQUIRRELS ATE MY 40M LOOP Antenna!

Really I have proof! This happened at 14:20GMT 01/28/17

I really don't know WHY they ATE the wire, and it's good Wire! .....  This wire is the SUPERFLEX TEFLON COATED made for placement in TREES, where it was for the last 2 years.  Well, the FURRY varmints decided that it was time to start chewing on the wire and BLAM! -- no more 40M LOOP --- now the wire is too short for the loop, and I'll have to create another antenna from the scraps... They SLICED right thru this wire. 140FT gone. 

LESSON LEARNED: 

SQUIRRELS REACT TO RF BY FEEDING ON TEFLON

DUDE, are you on that radio again? I'm just askin because I'm trying to get some shuteye. 

I watched on my backyard camera as the loop fell to the ground.

All WIRE antennas should now be created with 100 ton steel elevator cable.   

   -

=========================================

O YEAH!!! I BUILT A MOXON FOR 6M -- WOW 06/2015 CLICK HERE FOR MY 2M MOXON PROJECT AS WELL 09/2015
ORIGINAL 6M MOXON 2M MOXON STACKED ON 6M 

 

 

Sometimes I help NQ2F and KD2RD contesting in Port Jefferson NY - and I actually got this! 

John and Scott-- THANKS ! #1 in the 2nd Call area! #3 North America! 

 

 

 

 

 

 

 

 

 

 

How Long have you been in Radio/Television? c.1974 

40 years ago seems like a lifetime ...

 

 

7892115 Last modified: 2017-02-10 17:21:31, 16836 bytes

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QRZ Logbook Summary for - KD2HDZ
Latest Contacts for KD2HDZ at QRZ.com
dedateband mode grid Country op
AD6ZR 2017-02-23 20m PSK63 DN40cj United States Arthur L Vincent
IU2DMI 2017-02-23 20m PSK31 JN45lo Italy Daniele Missaglia
DM5DX 2017-02-23 30m RTTY JO64ub Germany Peter Uhren
DM5DX 2017-02-23 30m RTTY JO64ub Germany Peter Uhren
DL6LW 2017-02-23 15m USB JO41fd Germany Hermann Brand
DO1TU 2017-02-23 15m USB JO43xr Germany Thomas Uhlig
WA2ILB 2017-02-23 40m LSB FN45ic United States ROGER M ZIEGLER
KC2MKI 2017-02-23 40m LSB FN03ue United States BRIAN D CODD
W7KFI 2017-02-23 40m LSB FM18mv United States SUSAN A MECKLEY
4X1MO 2017-02-18 17m USB km72kd Israel ERAN ABARBANELL
WD4OOZ 2017-02-17 17m USB EM84bc United States JERRY L ROCKHILL
W4KKS 2017-02-17 17m USB EM74bl United States Jeffery S Clifton
K7EAE 2017-02-17 17m USB DN16xi United States Eugene A Eastman
WA4FHQ 2017-02-17 17m USB FM07ji United States J. RUSSELL DALLISON
N4GRS 2017-02-17 17m USB EL88wp United States GERALD R SHANKLAND

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c
United States Counties Award#2090
Granted: 2016-07-20 04:27:14   (KD2HDZ)

Endorsements:
  • 100 Counties Mixed
  • 250 Counties Mixed
United States Award#1432
Granted: 2015-09-01 15:05:35   (KD2HDZ)

Grid Squared Award#3458
Granted: 2015-02-15 20:14:09   (KD2HDZ)

Endorsements:
  • 10 Meters Mixed
  • 17 Meters Mixed
  • 20 Meters Mixed
World Continents Award#2071
Granted: 2015-02-05 21:10:42   (KD2HDZ)

Endorsements:
  • 10 Meters Mixed
  • 15 Meters Mixed
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