I have an Advanced Receiver Research 70cm mast mounted preamp, Model # MSP432VDG-160 preamp and bias T, model # DC-INJ for sale. The preamp will handle up to 160 watts of transmit power, it is RF sensed. Price of these items new is 278.95. I've had these for about a year and a half and will let them go for 195.00 including shipping. They are in perfect working order and I hate to sell them, I just have a need for the money. I will ship priority mail anywhere in the lower 48. This is a package deal and I will only ship to the U.S.. Payment is by Paypal only. Contact me off the board if interested. I hope this is alright to post here. These will be going on E-bay if not sold but I wanted to give fellow AMSAT members a shot first. Tnx and 73, Michael, W4HIJ AMSAT # 36017