MidSussexARS

• Re: G3SKI Silent Key

  I have much to thank Ron (& Fred Canning) for.

  They guided me through the valve era then conversion to transistors and the very first ICs.

   I still think of them each time I drive past the "Tech" on my way to hospital.

  R.I.P. Ron 

  Chris

  G4ZCS

• G3SKI Silent Key

  Just received some sad news from Martin Bravery
  
  Ron G3SKI died on Monday evening - very peaceful, just old age - 99 1/2 years - he always wanted to make 100
  
  He was in a nursing home in Chichester receiving care for some time now
  
  Ron was known by many of us who attended Brighton Technical College - he lectured there until about 1987
  
  Great man and always had time for everyone especially his old students
  
  Martin will let me know further details of the funeral service in due course
  
  
  Phil G4UDU

• G4UDU to MSARS

  Here is the profile between G4UDU and the MSARS antenna for the web SDR at the club shack
  
  
  Phil G4UDU

• Radio Path Profile

  Here is a very interesting and useful path profile, plotting tool - it is on a company website that sells Wi-Fi and Wi-Fi linking equipment plus other networking

  Just click on the map set up the two points start and finish, and you will see the profile between them

  This is the profile between G4UDU AND G6DGK

  Just a simple tool and obviously doesn't show you path loss in dB, but very useful in finding out what's in the way !

  https://www.solwise.co.uk/wireless-elevationtool.html

  Phil G4UDU

  

• New Yaesu Portable

  https://qrper.com/2024/08/the-yaesu-ftx-1f-portable-hf-transceiver-yaesus-replacement-for-the-venerable-ft-818-and-ft-817/

  Phil G4UDU

• Baluns and Traps

  Hi All,

   

  For those who were at the Talk by Phil G4UDU on the 9^th August and any others that are interested.

   

  I have picked up from Chris at RadioStuff (www.radio-stuff.com) my kit of parts to build my 9:1 balun with choke.

  Chris is very helpful, full of useful tips and he is local too, Partridge Green.

   

  There will be at least one Balun for Phil to check over on this Friday 23^rd.

   

  Regards

   

  Alan

   

• Baluns and UNUNs

  Phil's talk reminded me that my 18m vertical with 30 radials and an MRF998RT auto-tuner was a bit clunky on some bands and went off on a permanent hunt on 10m.

  So I re-wound a current balun from the junk box to be a 4:1 UNUN. Then shoehorned it into a plastic box from Screwfix. Pic attached. I must buy a bigger box next time!

  Anyway, conclusion: the 4:1 transformation is enough to reduce down the extremes in impedances to make them matcheable. All bands achieve better than 1.1:1 in under a second. And 10m now behaves.

  Thanks for the nudge Phil.

  John GM8JBJ

  	John Berry Mob. 07553 250919 Willowburn, Kirkton, Hawick, Scottish Borders, TD9 8QJ Twitter: @JBTimelessTime
  	Because Your People Matter:A playbook for managers, entrepreneurs and leaders 3rd ed. in bookstores now in paperback and Kindle serialised on YouTube
  	TimelessTime Ltd Web:timelesstime.co.uk Twitter: @TimelessTime LinkedIn:https://www.linkedin.com/in/johnberrytimelesstime/

   

  ᐧ

• Re: Friday

  Certainly food for thought.

  Will let you know what I settle on.

  John

  John BerryTimelessTime LtdTel: 07553 250 919Tel: 01450 372 274Sent from my Gmail Mobile.

• Re: Friday

  Make it a 5/8 or a 3/4 wave on 10m with a coax trap - will be ignored on all other bands

  Phil

  
  

• Re: Friday

  I’ve 18m so about 59ft. Minus my chopping. With 30 ground radials. So I’m thinking: return it to 18m, add a 4:1 UNUN and then see.

  I still want it to work on 10 so it’s quite an ask. Tunes OK but needs to be coaxed sometimes. Your talk prompted me to think that I could improve it.

  John

  John BerryTimelessTime LtdTel: 07553 250 919Tel: 01450 372 274Sent from my Gmail Mobile.

• Re: Friday

  As a straight length - 26 ft is good - that is the length of the Butternut HF6 and HF9 verticals

  
  

• Re: Friday

  Thanks Phil.

  I’ve tried shortening it, but not electrically lengthening. Food for thought.

  John GM8JBJ 

  John BerryTimelessTime LtdTel: 07553 250 919Tel: 01450 372 274Sent from my Gmail Mobile.

• Re: Friday

  If you can helically wind on 42ft of wire on your 1/4 40m antenna - assuming it is a fibreglass pole - that gives you a 1/4 wave on 60m and shifts away from any of the regular band resonances making it easier for an Auto ATU to function

  I use this method when away with the MH - I lay out a couple of radials and it tunes with an LDG ATU from 80m through to 10 without any problem

  Phil G4UDU

  
  

• Re: Friday

  Thanks Phil. It’s a balance I guess. Half wave on 40. Quarter on 80. Various on other bands. I’ve fiddled with the length and have a compromise for the MFJ998RT at its foot. But it’s still fickle.

  I’m thinking 2:1 or 4:1 UNUN will contribute without causing issues elsewhere. Your impedance-versus-frequency graph was very illustrative.

  73s

  John GM8JBJ

  John BerryTimelessTime LtdTel: 07553 250 919Tel: 01450 372 274Sent from my Gmail Mobile.

• Re: Friday

  You will usually find a 2:1 UNUN can help 

  Short ( less than a 1/4 wave ) verticals when resonant typically are around 25 Ohms or less

  Phil