All QSL requests honored. Send direct with SASE or via bureau.
Certificates held: DXCC, WAS, WAC, WAZ, WPX
Memberships: American Radio Relay League (#2000337110), Collins Collectors Association (#AC08-12133),
Quarter Century Wireless Association (#35791)
QTHs: Houston (K5WDW), Hilton Head Island (K5WDW/4) or Zurich (remote as HB9/K5WDW)
Educated at the University of Texas in Austin, Texas; graduated with BS in Chemical Engineering & PhD in Inorganic Chemistry.
Pursued postgraduate research in Inorganic Chemistry at the University of Illinois and in Chemical Engineering at Texas A&M University.
Worked 31 years in Research and Development at the Dow Chemical Company, retiring in 2001 as a research manager in Polyethylene Research.
Studied and passed Series 7 and Series 66 licenses given by FINRA in 2002.
Have worked 10 years as a financial advisor, first at A. G. Edwards & Sons then at Merrill Lynch, Pierce, Fenner & Smith.
Present position is Vice President of Investments at Merrill Lynch, Senior Financial Advisor.
I was originally licensed as a Novice class operator (WN5AKK) in the summer of 1962 while in college. The Novice license expired in 1963 but I became relicensed in May of 2007 after completing an exam for Technician class (KE5OQV).
The license was upgraded via exam to General class (KE5OQV) in June of 2007 and immediately exchanged for a vanity call sign (K5WDW). The General class license was upgraded via exam to Extra class in July of 2007.
The units shown in the photos below are my personal Collins S-Line collection. Both Round Emblem and Winged Emblem type units are represented. Also represented in the collection are different types of microphones as well as various accessories such as dummy loads, novice adaptors and noise blankers (both WE and RE). The collection has been maintained in excellent cosmetic, electrical and mechanical condition thanks to the efforts of Dutch Maurer, WB7DYW, now a silent key.
32S-1, 32S-2, 32S-3, 32S-3 and 32S-3A Transmitters ( on left side of shelf)
75S-1, 75S-2, 75S-3, 75S-3B and 75S-3C Receivers (on right side of shelf)
312B-5, 399C-1, 312B-4 (Top)
62S-1 and KWM-2
75S-3A and KWM-2A
75S-3B and 75S-3C
30L-1 and KWM-2
SM-2, SM-3, SM-3, SM-3, SM-3 and SM-2
302C-3, MM-1, SM-1, DL-1, SM-1, MM-1 and 302C-3
51S-1, 312B-3, 312B-5 and KWM-2
RE 180S-1 Antenna Tuner
RE 30S-1 Linear amplifier
WE Matched pair 51S-1 and 55G-1
RE Matched pair 51S-1 and 55G-1
The antenna at Houston, TX is a Mosley MP-33-N Trapmaster HF beam mounted on the roof using a GlenMartin RT-424 tower. The rotator is a Hy-gain AR-40. The mast is composed of two telescoping 5' sections of aluminum alloy tubing, held in place with stainless steel bolts
The height of the Mosley antenna above ground is ~40 feet. The antenna is very efficient with a forward gain ranging from 6 to 8 db, a front/back gain averaging 20 db, and a SWR ranging from 1.08 to 1.85 throughout the 10m, 15m and 20m bands. The maximum power output permitted is 2500 watts PEP on all bands; using the Collins 30S-1, the power output averages 1200 to 1500 watts PEP.
Mosley MP-33 Yagi beam
Close up view of Mosley MP-33 Beam
The Collins station in Houston, TX consists of a KWM-2A transceiver, 75S-3C receiver, 30S-1 linear amplifier, 312B-4 control station, SB-610C-3 scope, 516F-2 power supply and an ElectroVoice Model 664 microphone. The scope and receiver are from the estate of WB7DYW.
Operating position at Houston, TX QTH.
The house on Hilton Head Island has three separate Collins stations. The 40 meter station consists of a 75S-3C receiver, 32S-3A transmitter, and 30L-1 Linear amplifier. The 20 meter station consists of a KWM-2 transceiver, 51S-1 receiver, 55G-1 tuner and 30S-1 linear amplifier. The 15 meter station consists of a KWM-2A transceiver, 75S-3C receiver, and 30L-1 Linear amplifier. Both 30L-1 amps use Svetlana 572B tubes. The 30S-1 amp uses a 4CX-1000A tube. Either a MM-1 or SM-3 Collins microphone or an Electro Voice microphone may be used. RF Power monitoring is conducted using a WaveNode sensor.
Closeup of operating position at Hilton Head showing the Collins S-Line used for 40 meters with the SM-3 microphone. Above the S-Line are the 312B-4 station control units along with a 312B-5 VFO. Power output and SWR are continously monitored by a WaveNode system.
View of the right side showing the 15 meter station at Hilton Head with the 30 L-1 amplifier.
View of the left side showing the 20 meter station at Hilton Head with the 30S-1 amplifier.
View of Port Royal sound and the beach in front of the house on Hilton Head Island. The Delta Loop antenna is hanging in the trees on the right side of the photo. It's approximately 100 yards from the water and stands 70 feet above sea level.
The antenna at Hilton Head, Island, SC is a full wavelength 40 meter Delta Loop constructed of ~144 feet of #14 insulated wire configured as a equilateral triangle. The apex of the Delta Loop is suspended from a insulator hanging from a limb at ~58 feet on a "pine tree tower" behind the house. The feed point is at a lower corner of the loop via a 4:1 Balun from DX Engineering. The SWR varies from 1.0 to 1.8 over the SSB portions of the 10m, 15m, 20m and 40m bands. The power output is ~1200 watts PEP.
Delta Loop Antenna in Hilton Head Is, SC (antenna wire enhanced on photograph using Microsoft Paint). Feed point detail shown below.
Feed point configuration showing 4:1 Balun from DX Engineering connected to bottom corner of Delta Loop. Two flexible bungee cords are used at the bottom corner to allow for movement of the trees holding the fixed antenna supports.
Experimental SWR data plotted versus frequency for the Delta Loop antenna using the AIM 4170 analyser.
Predicted SWR versus frequency for the Delta Loop anenna using Z = 180 ohms, antenna length of 141 feet, feed point at bottom corner over a real ground.