参考这个：
The guy they called The Old Man?Sure,I knew him.Well,it wasn't actually me - it was my buddy,Al.I think his family knew him from way back.However it was,three or four times during our sophomore and junior years of high school Al called me to say that he had been invited to The Old Man's shack because he "wanted to talk" - and would I like to come along.
The Old Man's shack was a two-car garage,partitioned into operating room,workshop,and storage area in about the proportions of 1-to-2-to-3.His rig consisted of three six-foot relay racks full of what appeared to be home-brew exciters,amplifiers,modulators,and power supplies.The rig was dark and silent,and he never turned it on while we were there.In fact,I never heard him on the air,and later,when I got home and looked up his call in the Call Book,it wasn't there.
His receiver,a Collins 75A-2,was always on,with CW signals mumbling softly in the background.Once,while The Old Man was rummaging in a junk box,I reached for the tuning knob to get the feel of this paragon of receivers,and he put me in my place with a curt,"Please don't monkey with the receiver."
Well,The Old Man had said he wanted to talk,and talk he did - for nearly two hours.He regaled us with stories of how the Radio Inspector had threatened to confiscate his spark transmitter one Friday back in '24 because he was interfering with Great Lakes shipping traffic,and by the next Monday he had his first vacuum tube rig on the air.He told of being an engineer at a local radio station in the '30s and climbing a 200-foot tower in the wintery darkness to make an antenna repair in time for Amos and Andy.We heard how he was in the South Pacific during World War II,training island natives who didn't know a word of English to copy code by rote memory:dot-dash,write an A; dash-dot-dot-dot,write B; and so on.His eyes sparkled as the names of hams and radio men he had known rolled off his tongue by the dozen,and he seemed to expect that we should know these people as well as we knew our classmates in school.
Finally,he wound down and said,"Well,this is boring to you.Now,how would you boys like some radio parts,on the square?"
Al managed to say,"Sure!" but I could only hope that The Old Man read the wide grin that broke out on my face as a "Yes!" That first visit he gave me a power supply for my VFO.(I had just gotten my general.) It used a type 80 rectifier,so it must have been from the early '30s or late '20s.I had ridden my bike over,and it was a real struggle to keep that bulky thing under my left arm while managing the bike with my right.
By the second visit Al was driving,and we made sure the trunk was cleared out before we came.Good thing,too,because that time he gave me an old Hallicrafters AM transmitter; it must have been three feet wide and weighed over a hundred pounds.On other visits we came away with antenna tuners,microphones,transmitting tubes,and 500-watt power transformers.
He mentioned that the transformer secondary was 900 volts RMS,and when I asked him what "RMS" meant,The Old Man practically exploded:"How can you do anything in radio if you don't know what RMS means?" So he sat me right down and explained it to me,and even though I was still a little shaky on the details I told him that I understood it perfectly,Yes Sir!
Well,that's about all.We were supposed to see The Old Man again one Saturday in late May,but Al got a call on Friday that they'd taken him to the hospital,and a few days later we heard that he'd died.What with school and me starting my first job about then,I never did find out what happened to his garage full of stuff and that untouchable 75A-2.
Say,look - I've got to be getting home.The kid across the street is into computers,and I told him that if he'd come over after supper I'd give him my old PC,and a modem and some other junk.It's funny - that kid comes over and gets me talking,and he don't leave for maybe two,three hours.I was telling him about my first computer,an Apple II - and I don't think he'd ever heard the name of Steve Wozniak before.And he didn't know what TTL levels were!Now,how's he going to do anything in computers if he doesn't know what TTL levels are?