Re: June SARC Minutes
They don’t allow attachments! Hm. Here is the text.
SARC General Meeting
June 12, 2014
Meeting was called to order by Bob Rod (K5AUW) at 6:55 PM.
Presentation by Bob Rod (K5AUW) “Common Myths about Standing Wave Ratio.”
Voltage Standing Wave Ratio = SWR. A Standing Wave is a wave of energy such as light or sound or RF or that appears to be standing still. This is because waves of energy are flowing at opposite directions. SWR is the ratio of the max to minimum voltage in the feed line. If you have high SWR and you are not using good coax, the extra voltage will punch a hole through the insulation.
Myth: High SWR will cause radiation or RFI. SWR will not, by itself, generate RFI. Radiation is caused by a mixing of balanced and unbalanced antennas. A device called a BALUN (balanced/unbalanced) to use antennas and feed lines of different types.
Myth: a SWR of 2:1 will prevent the radio from getting out. False, on HF band the use of high quality feed-line will allow SWR to be high without an effect. Use the highest quality, lowest loss feed-line that is practical. RG-58 is okay on 80 meters but wastes most of your power on UHF. A Hard line is great for UHF but a waste of money on 80 meters. Not all coax is equal.
Myth: Antenna tuner does not tune the antenna it just fools the transmitter into thinking the antenna is tuned. False, it does not tune the antenna unless the tuner is at the antenna feed point. A tuner near the transmitter does not get rid of high SWR, it creates a conjugate match between the transmitter and the antenna, allowing maximum efficiency.
Myth: Reflected power caused by high SWR goes back into the radio and burns up the finals. Reflected power cannot go back into the finals. High SWR can cause your finals to burn but not but that is because the reflected power reaches the radios coax connector and is reflected back to the antenna. Older solid state radios without high SWR protection will eventually burn up if connected to a high SWR antenna system.
Bob Rod (K5AUW) offered a correction to the minutes: Lew Archer (WOYVY) will operate the GOTA Station at Field Day. Motion to approve the minutes (as amended) by Rich Kreiser (NOJBF) seconded by Bryce Weathersby (KE5KFD). Motion carries
Treasurer's report is the same as last month. Motion to approve Treasurer's report by Bryce Weathersby (KE5KFD) seconded by Esmeralda Valague (KE5YFH) motion carries.
Field Day: Richard Elder can be reached at 210-241-4600. Friday the 27th at 3:30 – Meet at the club storage area. If coming up NW Military from 410 – Turn Left on West Avenue and Right on Patricia. The gate code is 1716. Look for the 500 series area of the facility. The club needs pickup trucks to bring things to the site. The club trailer has a 2 inch ball. After loading, the club will caravan to Shavano Park Municipal facility. There will be various generators available. Bring extension cords, power strips, box fans and coax cable. There is a 10x20 shelter available that will be setup on Friday. After Friday setup everyone goes to Bill Miller at Huebner and Lockhill Selma. The generators will not be left out but left on the transport trucks. Saturday morning meet at 8:00 to set up generators and antennas. The club needs a lot of help to set up the 40 and 80 meter dipole. All should be operational by 12 noon and we will be operating all day Saturday through the night. Mike Check (K5UCQ) will bring a pop-up trailer with AC for a cooling station. Saturday evening around 6 PM – Rudy's BBQ will be served. Sunday morning we operate until 10:00 am, tear-down around 10:30/11:00. Then everything needs to be packed up and taken to the storage area. The club is hoping for 500+ contacts. There will be 4 computers and a hub/server to network together to reduce repeat contacts. There will be voice, would love some CW (extra points), if you have a digital station – bring it. Satellite also welcome. Red Cross officers, City Council, the media and others are welcome to stop by. If you have an antenna, bring it. Antenna analyzers will be available. The club will need to decide soon if we will officially be a 2, 3 or 4 station operation. GOTA does not count for points but is good outreach for non-licensed people.
Rowena: Next month (in July after the meeting), Rowena will be looking for dealers and speakers for Ham Fest. Need input for new speakers, etc. Presentation for speakers is 45 minutes.
Motion to adjourn by Esmeralda Valague (KE5YFH) seconded by Bryce Weathersby (KE5KFD) motion carries. Adjourn at 7:45 PM.
From: W5SC@... [mailto:W5SC@...]
Sent: Wednesday, July 09, 2014 11:21 AM
Subject: [W5SC] June SARC Minutes
Everyone, here are the draft minutes for the June SARC meeting. Please glance over and come to the meeting with revisions and/or a motion to approve. Thank you kindly.
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