How could you that without powering it up? Did you use an artificial load from cathode to ground? 73 Peter -----Original Message----- From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On Behalf Of Hugh Duff Before I powered it up I tuned the input and output sections for minimum SWR at 144.1 MHz using an MFJ-259 antenna analyzer.