05-12-14 13:10 Roy Witt wrote to Ed Vance about Resurrected   
      
    RW> @MSGID: <537146BB.417.amtradio@capcity2.synchro.net>   
    RW> Greetings Ed!   
   Howdy! Roy,   
   -snip-   
    EV>> I'm thinking the Finals in that TX were 810's in push-pull.   
    EV>> Can't remember what tubes they were Modulated with.   
      
    RW>> 12AX5s?   
      
    EV> No, more like 833's in the Plate Modulator section on the rack.   
      
    RW> The tube I mentioned would have come after the 833s.   
      
   When I first saw "12AX5s?" I was thinking about a tube such as a   
   12AX7 which is a 9 pin minature tube.   
      
   The 12AX5 wasn't in my 1976 A.R.R.L. Handbook, so I tried Searching   
   to see what kind of tube it was.   
   I gave up when none of the Results for the searches I did said anything   
   for the 12AX5, all they were for were the 12AX7 tube.   
      
   What size power output does a 12AX5 have?   
   Who makes it?, Eimac, RCA, GE?   
      
   Earlier I wrote 833 but the Plate Modulators for that 1KW (Input)   
   Transmitter must have been something nearer the 813, after I looked at   
   the Tetrode Transmitting Tubes section in my 1976 edition.   
   I never got to use that Rig because between Sept 1956 and June 1959   
   some of the students who had General Class licenses "modified" the   
   RF deck and it couldn't be used.   
   Also the Teacher who was there when I arrived at High School left   
   the next year and the New 'Instructor' for the Electronics and Radio   
   Classes the next two years I was there, wasn't knowledgable in anything   
   about Electronics.   
      
    EV>> The Rack Cabinet was over 6 Feet tall for the TX.   
    EV>> -snip-   
      
    RW>> That would house a complete 2mtr repeater, with tuned antenna   
    RW>> cavities.   
      
   Sure, those BUD Cabinets were in use in lots of different places,   
   such as AM Broadcast Band Radio Stations.   
   -snip-   
      
    EV>> You're thinking VHF/UHF, the Discone was HF.   
      
    RW>> If they were xmitting on the same frequency or in close   
    RW>> proximity to it, they'd use tuned cavities. If they were using   
    RW>> one band to xmit on and another band to rx on, they wouldn't   
    RW>> need tuned cavities. i.e. crossbanding. I have a radio that   
    RW>> will do that. It receives on one band and repeats it on   
    RW>> anothere, VHF to UHF...   
      
   I can't remember any Split-Frequency set ups until maybe 1965 when   
   I heard the County Police Received on a different Frequency than they   
   Transmitted on.   
   I started hearing about 2M FM Repeaters in the mid 1970's using Split-   
   Frequencies.   
   Every thing I knew before was all Simplex, Receive and Transmit on the   
   Same Frequency.   
      
    EV> All I can remember about the Antenna connection to RXs were that   
    EV> there was a Panel on the wall (Bulkhead) that had several columns of   
    EV> Male N?? connectors for hooking up the HF RXs in the Radio Room to   
    EV> the Antennas using Coax Patch Cables for each RX on the panel.   
      
    RW> I'd love to have one of those Patch Panels...   
      
   If the USS Enterprise video You saw showed 'Radio One' You probably saw   
   one of those Patch Panels.   
   What was nice about them was the Male N?? Connectors had a collar that   
   was pulled back to connect to the Female Connector on the Panel.   
   A lot easier than twisting the collar on a PL-259 on to a SO-239.   
   -snip-   
    EV> I am not knowledgable about RADAR, but think they were on freqs in   
    EV> the SHF Range. A Radar Tech showed me some small boxes that were some   
    EV> components of the radar set, and IIRC they were Copper boxes with   
    EV> pieces of Brass Tubing and other parts inside them. -snip-   
      
    RW> That sounds like a 'waveguide' setup, which would be used in a   
    RW> radar system.   
      
   YES! that's why I thought to write SHF above instead of UHF, but since   
   UHF is 300-3000 MC/s they may have been up in the 2Gc/s freq range, I   
   don't know.   
      
    EV>> Up 3 or 4 Levels above the Flight Deck there were some 300MC/s UHF   
    EV>> gear but I can't remember if they were Transceivers or Transmitters,   
    EV>> all I remember about them was they had a 4X150A Final that the ET's   
    EV>> (Electronic Technicians) had to replace after so many hours of use.   
      
    RW>> Whether it was worn out or not.   
      
    EV> Yes, because those rigs needed to run when Aircraft were aloft.   
      
    RW> I wonder if they had a means to test those tubes in case they   
    RW> might be needed as a backup...Or did the Navy supply have tons   
    RW> of them, like their toilet seat supply?   
      
   The ET's replaced TONS of 4X150A's while I was aboard the Ships I were   
   on, I never saw any toilet seats replaced during my Tour Of Duty that   
   ended in DEC 1962.   
      
    EV>>> And then there was a person who had both a Citizens Band Call for   
    EV>>> his self and a 27 MC/S Business Band Call for his business, who   
    EV>>> would sometimes use the Business Band RF Amp when he talked on the   
    EV>>> Citizens Band Frequencies (Channels).   
      
    RW>>> I don't recall there being a business band on 27MHz...   
      
    EV>> Sure was, it had a FCC Class Letter but I can't remember if it was   
    EV>> Class C service or what.   
      
    RW>> Class C was remote controlled hobby toys. Model airplanes, etc.   
    RW>> Still used today, btw...   
      
    EV> O.K., Class C was for Hobby, maybe the 27MC/s Business Band was   
    EV> Class B?   
      
    RW> I remember seeing Class A - I forget?, when I looked for the CB   
    RW> service, aka Class D...   
      
   IIRC Class A was the Original Service that were on 465Mc/s Vocaphones   
   Brand Radios, that may not be the name of the Company but that is what   
   popped in my head as I was typing. ..__..   
   -snip-   
    RW>>> Thus the name, bootlegger...   
      
    EV>> No, Bootlegger's are anyone transmitting on any unauthorized Freq.   
    EV>> or using any unautorized Mode, or unautorized Power Level.....   
      
    RW>> You know, I looked all over for a defintion of that phrase, but   
    RW>> all I could find were references to moonshiners.   
      
    EV>> Just like bootleggers in Kentucky and elsewhere who ran Stills to   
    EV>> make Moonshine Whiskey without a Government Distillary License to do   
    EV>> so. -snip-   
      
    RW>> 8^) That terminology deosn't apply today, as there is no   
    RW>> license required to operate on the CB channels.   
      
   But it is on Amateur Radio Frequencies, and those 'Electronic Hobbyist'   
   that used Yesau Tranceivers, and probably still do on our Ham Bands fit   
   the Description above.   
      
    EV> I thought we were talking about People Transmitting on some Frequency   
    EV> that they don't have a FCC License for, whether its Outside the CB   
    EV> Channels or On Amateur Radio Bands or any other Band.   
      
    RW> That has been going on for decades. i.e. Commercial fishermen   
    RW> using CB channels, even though they have a license to use   
    RW> Marine channels.   
      
    EV> In my mind, those folks, what ever Power Level they are using, if   
    EV> they are not authorized by the FCC to use those freqs, are   
    EV> BOOTLEGGERS here in the USA, plain and simple. dit dah dit dah dit   
    EV> dah  (PERIOD). -snip-   
      
    RW> I would call someone with a CB radio who advertises a business   
    RW> over the air a bootlegger. Since there is no requirement to be   
    RW> licensed to use CB, they're not bootleggers until they do   
    RW> something like that.   
      
   I see nothing wrong with that business person using a CB Radio,   
   I thought the 27Mc/s Citizens Band was for Companies that wanted   
   a Two Radio Service but didn't want the expense of having Motorola, RCA   
   or General Electric Mobile Radios.   
   -snip-   
    EV> ... Why don't sheep shrink when it rains?   
      
    RW> They're pre-shrunk. Sheep used to be the size of a camel.   
      
   Hey!, that's nice, I like that.   
      
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