drb,
Just a couple tips.....
Make sure that you have at least 4' of Coax between the Antennas and Combiner,as Mike has suggested.
Matching Transformers and Cable should be identical (type/length).
Get a "Bulkhead/Inline Coupling, and set the Antennas up individually, at first.
Use the Coupling to bypass the Combiner, on each Antenna, and when you have them working as expected for their respective stations, THEN combine them.
You may have to move them well more than 4' apart !
Good Luck
Have a good Day !
