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  QSL image for K5WDW


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Lookups:   12647 Ham Member

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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)

Biographical data:

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.

Amateur history:

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.

Equipment Used:

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 overlooks Port Royal Sound.  


Closeup of operating position at Hilton Head showing the Collins S-Line (KWM-2 Transceiver, 312B-5 VFO and 30L-1 Linear Amp with a SM-3 desk microphone).  Power output and SWR are continously monitored by a WaveNode system

View of Port Royal sound and the beach in front of the house on Hilton Head Island. The Delta Loop antenna is suspended parallel to the ground in the trees on the right side of the photo. It's approximately 30 yards from the water and stands 35 feet above sea level.  It resonates at 10, 15, 20 and 40 meters with an SWR of less than 1.5:1 on all bands.  The wires terminate in a 4:1 Balun; low loss 52 ohm coax is used to transmit the signal inside the shack.




Last modified: 2014-03-23 14:34:52, 6417 bytes

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