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I enjoy operating HF - VHF - UHF - SHF and QRP contesting (note VHF - QRP contest station above, and yes, all those antennas were carried in the car). Most higher power operation is used on EME which includes the following frequencies: 144-222-432-1296-2304-3400-5760 MHz. Our current EME activity is 23cm and 13cm and from the TCC-ARC station is 160m - 23cm. 

Currently, I am an college instructor and the TCC-ARC and IEEE advisor, and also an RF circuit designer (LNA's pictured below).  Listed below are a sample of projects that students and myself have worked on over the past few decades.

73's Tommy

Below: Students testing small- lab built (home brew "HB") 432 MHz Antennas for the KP4AO special EME event operation of the 1000 ft Dish at Arecibo, PR in 2010 (Joe-K1JT, Angel-WP3R, and others set-up the KP4AO operation). All students received the CW EME signal from KP4AO with their own HB designed antenna pictured and the club completed CW and SSB QSOs using the 16 x 10 element K5GW yagi antennas shown and 100W. A HB AGO-LNA (0.2 dB n/f or about 15 degrees k) was used for all rx measurements.  Next to the KP4AO QSL is a picture of the 1000 ft Arecibo Dish I took while visiting the facility.  Note the road under the Dish!

Also pictured is the Tulsa Community College HORN antenna project starting with a HB 5ft, circular polarized, horn in 2011 to receive 1420 MHz radio astronomy and EME signals. The 5ft horn made 8 EME Contacts on 23cm with our good friends Joe K1RQG (sk), Peter G3LTF, Al K2UYH, Peter SM2CEW, LX1DB, F2TU, G4CCH and SM4IVE.  Students help construct a longer 8ft horn in 2012 as shown. The latest horn project is the new 16ft long 5ft square CP horn with +25 dBi gain.  The new horn was completed and used in the 2014 ARRL-EME contest which is also shown below. The WD5AGO/b also is running on campus at 1296.300 - 3w - omini slot - EM26ad, best DX report is 215 miles.


Below: The current 3.4m dish used for 23cm through 6cm EME. Echoes on 13cm are +12dB above noise and use mostly HB equipment, 0.3 dB n/f LNA, 250W, 3 ring Scalar CP feed. Measured RX performance on 13cm is: sun noise is 14 dB @ SFU 70, moon noise is 0.4 dB, and Sagittarius is 0.25dB. The feed-horn shown in the dish is for 9cm, the one on the ground is the 13cm feed. 93 initial CW Qs on 13cm.  Custom built LNA's used are pictured on the right.

Below, My 2m-70cm-23cm EME station while living in Tulsa. This picture "of students helping out before contest time" was in the ARRL Handbook EME section in the late 90's. Note school bus in the street. Our group took 4th to 2nd place in those years in the multi-multi EME class until we took the arrays down in 2001. The 6m dish and tower was also all HB. The 2m array shown is one of 24 different  Arrays Designed or Built and Used on 2m EME until the move. This one is a HB 8 x 8 element modified W1JR design we threw together a week before the 1993 ARRL EME contest.

Next Below- Is our Dish rebuilt due to snow/storm damage in 1996. I used a little different construction method and made it 5.5m (18ft). As above, the dish was built from raw square and round AL tubing in a local scrap yard.  The tower was also HB using angle steel and a prop pitch motor to turn the dish. 39 states were worked with 175 initials Q's on 23cm before the arrays were taken down. 


Below: Our 1st Remote 70cm EME: Expo to the State of Ark. in 1985.

Our portable 70cm EME operation with friends Charlie, W0RRY and John, KF0M. Station: 600W and W1JR's old 8x 21ele F9FT array mounted to the bed of my car. We activated the state to a few needing it for WAS on 70cm. In 1988 we made  another 70cm EME trip to Arkansas w/KF0M to help our friend Tim KL7WE (sk) to complete his 70cm WAS. That trip we used 4 * 32ele HyGain Yagis, mounted to the bed of a new Chevy S10.


Flash Back to the early 80's below: A Couple of 2m EME arrays, the 1st pic is my HB 6 x Quagi and the other was 6 x CC 3219, which was our main array in 1985. I built a combination of 24 different 2m arrays from 1981 to 2001 which ranged from HB 4 or 6 short Quagi's, 4 - 13ele long Quagi's, 4 - 15ele KLMs, 4 or 6 or 8 - 19ele CC 3219, 2 - 18ele M2, 4 - 12ele M2, 80ele and 120ele CC collinear, HB 4 or 6 or 8- 8ele W1JR style yagi, 4 CC Jr Boomers, and many others HB yagis.  Below is another Portable VHF contest outing in OK were our highest QRP score before grid squares was located.


When not operating VHF, UHF, or SHF, I like to design and operate HF QRP. Below is our HB 17m Superhet QRP rig designed for the 4SQRP group in 2005 and named it the Ozark 17. Shown is our prototype and main unit with digtal frequency readout. Spec's: 18.072 - 18.096 MHz VXO, High level mixer, -130dBm MDS, Split Tx Rx, 1.5W Pout, Harmonics -50dB, break-in with keyer.  

The last pic below is another hobby I have always liked... Drag Racing.  Then it is just natural to build and race EV's. This is my current bike... 260v @ 1000 A, dual motors, runs 10's at 125 MPH ........ 73's Tommy

7794369 Last modified: 2016-12-30 16:37:14, 11441 bytes

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