SWIARC News

HF Balun

HF Balun


Bill FJR brought up a question on baluns a couple of nets ago, wondering how they’re made and what’s inside. The W2AU Balun is a popular type, and the picture shows a competing model with its innards exposed, an air core 3 winding transformer type balun. (DC wise, everything measures a short.)
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There are both air and ferrite core transformer baluns, plus choke baluns made of a couple turns of coax or several ferrite cores put OVER the coax near the antenna. A massive subject. We discussed a little of it at the March meeting. A review of the rest including the rare GALAXY 530 receiver (also pictured) will be in the next newsletter. Are you a member? If not and you’d like to read the news, send fifteen bucks to SWIARC, Box 661, 51502 to get the newsletters for the rest of 2014.
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Mike HZF won the first prize MFJ p/s at McCullum 03/01, but a few minutes earlier we had called the D/P ticket belonging to Don YLA who was NOT present. He came back from a mall pkg lot to collect it. Everyone else who won prizes happened to be there including Mike shortly after 11AM when things were getting a little thin. (SWIARC’s Door Prize policy is to award the prize to whomever holds the ticket so you do NOT have to be there to win, just the ticket in the hands of a friend.)
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SWIARC meetings are held 4th Thursdays, 7:30PM, at the Council Bluffs Red Cross, North 16th at ‘G’ Street. All are welcome. (Be early.) For more info, get on the Co/Bluffs 146.82 R- repeater or E/M to Greg, N0GR at ARRL dot net, or Rich, WA0ZQG at Hotmail.
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If you’re new around here, one way to get acquainted is to visit a club meeting (4th Thurs at the Red Cross for SWIARC) or get in on some 2M nets like:
Sunday 9PM 146.94 R-
Monday 9PM 146.94 R-
Wed 9PM 146.82 R-
Sat Noon Swap Net 146.82 R-
There are a bunch of other nets on other repeaters. Look further down here – the articles below – for a list of 2M and 440 repeaters. Note: Only the first half dozen articles are displayed on the Home Page here. You have to get into the last displayed article and THEN NOTICE THE NEXT UP or DOWN ARTICLE TITLE at the top of the article page and click on it to go further down.

Robert KC0MUXs Table

BARC Fest Apr 2014

. Ed KD0CVG won the 50W dual band mobile radio, a WOXON that does cross band repeat and other nice tricks. Stan W0CHFs favourite, Linda W5—, won the set of HUSTLER mobile coils. It was a great Hamfest. . Greg KG9OC showed up with a Server Computer for sale. With the top off you could …

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Transistors from Iowa

Everyone knows about Lee DeForest and his connection to Iowa, born around here, but moved out of state as a child. He invenxxxx added a third component to Fleming’s 2 part Diode tube, a grid, and was able to amplify signals electronically for the first time (before 1920). (It took Armstrong to explain how, but …

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Chemtrails over Midwest

VHF Propagation Declines

. Everybody thinks Amateurs helped invent Cellular Radio. Not so. Amateurs (using surplus Motorola equipment) built some of the first VHF Repeaters enabling an increase in usable range for those freqs. They were intended to make the VHF bands useful over city-wide geographic areas where before you either had to be on top of a …

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Electric Heat

Basic Electronics Course

. SWIARC is concentrating on Basic Electronics for the month of APRIL, and this is our first example, explaining the simplest use of electricity to heat. Actually, it’s usually more efficient to heat with coal, oil, or gas because electricity is often generated from one of those sources, and having to go through two processes, …

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Mike KD0HZF wins P/S

McClelland IA Hamfest summary

. It’d been scheduled for 11:30 (earlier Chinese H/Ts at 0930 and 1030), but people were leaving so we awarded 1st prize shortly after 11AM to SWIARC member Mike KD0HZF. Other winners included: Don WB0YLA, TDX dual band H/T Joe KC0CDP, Baofeng d.b. H/T Ed N0JJQ, Baofeng d.b. H/T . Mike KD0HZF, $20 gift cert. …

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