Can anone enlighten me as to the Specs on the DC pwr. supp. known as Tripp-lite ?:? (20 amps) It appears to be a good unit for an exciter but , without more info I can't be sure !!! Is this a linear unit or a switcher unit ??? The seller says simply * it's a pwr. supply*.!!!! this tells me something about the seller, ( but I won't say it here ) carl / kz5ca