I recently acquired two sets of rhombic termination resistors (300 ohms)and two 50 to 600 ohm input baluns that were manufactured by Collins. There numbers are: 1) 754-9057-001 and described as "1KW Termination Kit" 2) 774-6261-001 " 3) DAA805-68-C-0020 " "Transformer, Radio Frequency /TF506/TRC-136" 4) 758-5322-001 " "50-600 ohm Balun" plus one - 7649858-001 also labeled - 764-9604-001-D with "REV B" one - 764 9058 001 with "REV C"
Can you shed any light on these items? I am very desireous of building a rhombic and am excited about this new acquisition. They may be surplus military as I heard about a few being used in MARS stations in Vietnam back in 1967, when I operated the MARS station at Ft. Detrick, MD.
-- John Rauch, N4YXS
This reference is rhombic-related emails sent to KB1SG.
It was written by Ian W. Cummings, KB1SG, and displayed by EI8IC, with his permission.
KB1SG's e-Mails on Rhombic antennas and their usage:http://www.mapability.com/ei8ic/rhombic/email.php