SKCC 5123T----- FISTS 14979----- Flying Pigs 2331----- NAQCC 3610-----QRP ARCI 14176-----Polar Bear 257

Tuesday, January 1, 2013

Doublet Your QRP

I always wanted to try the Norcal Doublet. It is built from computer ribbon cable. Since I am now interested in 60 meters portable, I decided to go for the long version which is 88 feet long.  For a test I went to the front yard and setup with a 31 foot Jackite pole in the center and 20 foot fiberglass poles at the ends. I am directly feeding it from the KX3 using the internal tuner. Since the rig is floating with respect to ground I don't think I need a balun. I found it tunes on all bands 80 through 10 except 30 meters that only got down to 2.5 to 1. A call on 60 meter yielded a contact with AK4JA Bobby in the Atlanta Area. We had a Q5 QSO with my KX3 at 5 watts and I am assuming his 817. Bobby is one of several QRP folks I have met on 60 meters. I think I will call this a success. You would need some room to stretch out the 88 feet. I bet it could work at 3/8 wave for 60 meters which would be about 66 feet. I also have enough cable left to make a 44 foot version. This really makes a nice portable pack-up. I hope to do some portable ops when the next nice day comes around. I located the ribbon cable on EBay. It was10 conductor 100 foot roll. You need at least a four conductor ribbon cable. Note the suggested tuner is a BLT tuner which can be found at,  I 'd have to see if it covered 60 meters.