Show posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - gil

1
Antennas / Re: End fed windom
February 10, 2020, 05:34:57 am
Quoteno matching needed on the most bands?

Hi, correct. I am talking about a half-wave end-fed with a 49:1 transformer, not a random wire with a 9:1 UNUN. I have built a Windom, albeit not this exact design, with a dual-core Guanella BALUN. Because the two legs aren't the same length, even with the BALUN, I had RF stray currents problems... Actually, I've had troubles with random wires and any antenna that was not fed in the middle or half-waves at the end. Now, I only use dipoles or HWEFs, sometimes quarter-waves with radials, but I avoid antennas fed somewhere in between... Too much trouble...

Gil.
2
Thanks Sparks :-)
Gil.
3
Great info Scott, thanks. Certainly, but I would not trust AES. There has been allegations of voluntary weaknesses introcuded to allow possible decoding. I don't remember the details. Bottom line is, I do not understant it enough to be able to determine its security. A one-time-pad is very simple and indeed does not require a computer. In the filed, it would be the simplest way to send an encrypted message. Anyone can learn to do it with pen and paper. The problem is if you have to explain to someone why you carry a long string of seemingly random characters on you... No doubt it would land you in jail forever in many countries, or worse. If I wanted to use a computer encryption cypher I might look at Blowfis/Twofish... That raised a stink when it came out, indicating that it did bother quite a few people... But a cypher sponsored by the NSA, no thanks. Anyways, I have no use for encrypted messaging at this time... If I ever do, and I hope not, a simple one-time-pad would do. Note that you may be able to transfer a long random key file now but not ten years later... For example, you could send a key file encrypted via PGP today by email, but in the event that the internet is no longer available in the future, you would be SOL.

Gil.
4
Well, it just happened that I was visiting my parents up North this week-end so I missed it. I do want to make a winter outing though, just to test my equipment, radio and camping/bugout...

Gil.
5
Quotei know there is no pleasing Gil on that front haha

That's right ;-)
I really do like the 20W power level though...

Gil.
6
Morse Code / Waiting for a Norcal 40!
January 09, 2020, 05:19:35 am
Hello.

Great news (for me), I found a Norcal 40A kit on Ebay! It isn't sold as a kit but as a PCB with a bag of components. I call that a kit, but oh well. The Norcal 40, precursor of the Elecraft K1, was designed by our member Wayne, co-founder of Elecraft; or was it K8IQY? I can't remember. The PCB files were released in the wild and some people made runs of the board. A club in England put a kit together for its members and apparently had some left over... I don't know if they have more but a quick search on Ebay for "Norcal 40" will answer that question.

The Norcal 40 is a single band CW transceiver with the amazing receive current of 15mA! Power output is around 2.5W, drawing around 200mA. It will run seemingly forever on most battery packs. It is in the same category as the Small Wonder Labs SW+ from Dave Benson.

There will be a video of course, if it works, and I don't see why not...
Anyone here has used one before?

Gil.
7
Hello. I made a lot of great contacts from Florida to Eastern Europe using a PAR 10/20/40 end-fed half-wave hanging vertically, including one to Estonia using 1.3W. Stateside contacts fell into a 800 to 1300 miles radius... I had very few contacts with Western Europe. Not much success between 50 to 800 miles, though Ray and I had almost daily contacts at 820 miles.

I observed the same thing here in the South of France: Easy contacts to England, Germany and Eastern Europe, all around the same distance; nothing to, say, the Paris region...

Gil.
8
Antennas / Re: End fed windom
January 06, 2020, 05:45:11 am
QuoteNo tuner needed and you donĀ“t have to care about ground connection.

Same as an end-fed half-wave...

Gil.
10
Antennas / Re: Antenna Camouflage
January 06, 2020, 05:23:22 am
You can probably just lower your power on 10m, which doesn't need much to skip very far...

Gil.
11
General Discussion / Re: Encryption
January 03, 2020, 05:46:45 am
Some DMR handheld radios have built-in encryption, like the TYT MD-680.

Gil.
12
Digital Modes / Re: Sound Card Interface
January 03, 2020, 05:45:19 am
Hello. I use the Mini PRO SC, so far no problems, but I don't use digital modes much...

Gil.
13
Antennas / Re: End fed windom
January 03, 2020, 05:44:05 am
This antenna seems overly complicated compared to a simple 49:1 or 64:1 transformer...

Gil.
14
Antennas / Re: Antenna Camouflage
December 27, 2019, 06:41:37 pm
Hello. I think it will take paint well if you sand it before then clean it with acetone. Why 36ft? You can't make a half-wave on any ham band with 36ft... Do you mean an end-fed random wire?
Watch this video:


Gil.
15
CB / Re: Is it wise to buy a CB
December 26, 2019, 09:05:46 am
It certainly isn't what it used to be... A half-wave end-fed wire with a 49:1 transformer would be the best antenna for CB IMHO. Height is your friend for local comms...
Gil.