05-07-14 18:37 Roy Witt wrote to Ed Vance about Resurrected   
      
    RW> @MSGID: <536B5F01.398.amtradio@capcity2.synchro.net>   
    RW> Greetings Ed!   
   GA Roy!   
   -snip-   
   Re: the Sixer.   
    RW> It probably won't interfere with a standard TV either. At least   
    RW> not one of recent manufacture.   
      
   If I did try using the Sixer again I would talk to my neighbor first   
   to ask them to let me know if I was causing any RFI to them.   
   -snip-   
    EV> When I started High School in 1956 the School Radio Club got so many   
    EV> complaints from one household that had an older TV Set with a IF of   
    EV> 21MC/s was being interferred with by the clubs KW AM XMTR on 15M that   
    EV> the Radio Classroom Teacher pulled out the 15M plug-in coils and put   
    EV> 20M coils in it.   
      
    EV> The club didn't get any RFI complaints after that mod was made.   
      
    RW> 8^) Of course not. 15m is on the 21MHz band...20m is in the   
    RW> 14MHz band.   
      
   Sure.   
      
    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?   
      
   No, more like 833's in the Plate Modulator section on the rack.   
      
    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, a Rack that tall could hold a lot of equipment, I could put   
   my old Hallicrafter SX-42 and Heath TX-1 "Apache" and have room to   
   spare to put a Antenna Tuner that uses Plug In Coils and still space   
   for other things, if I had them, to mount in the cabinet.   
      
    EV>>> I 'Think' I recall that several Transmitters on different   
    EV>>> frequencies could be connected to the Discone (through Antenna   
    EV>>> Tuners) and used at the same time.   
      
    RW>>> That's how a repeater works. It uses tuned cavities to allow   
    RW>>> the xmitter to use the same antenna as the receiver w/out   
    RW>>> interferring with each other.   
      
    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...   
      
   All I can remember about the Antenna connection to RXs were that there   
   was a Panel on the wall (Bulkhead) that had several columns of Male N??    
   connectors for hooking up the HF RXs in the Radio Room to the Antennas   
   using Coax Patch Cables for each RX on the panel.   
      
   IIRC Each Column was for a certain Frequency range.   
      
   I don't know if anything like a Tuned Cavity was in the Panel, I just   
   thought Filters were inside the Panel, but each CW Operator position   
   had Full Break-In.   
      
   The TXs were in different compartments aboard ship and not in   
   Main Comm, or close to it.   
      
    EV> I got out of the Navy in 1962 and the only thing I could remember   
    EV> aboard the Ships I were on that used tuned cavities was the Radar   
    EV> sets.   
      
    RW> A user of frequencies in close proximity?   
      
   I am not knowledgable about RADAR, but think they were on freqs in the   
   SHF Range.   
   A Radar Tech showed me some small boxes that were some components   
   of the radar set, and IIRC they were Copper boxes with pieces of Brass   
   Tubing and other parts inside them.   
   -snip-   
    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.   
      
   Yes, because those rigs needed to run when Aircraft were aloft.   
      
    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...   
      
   O.K., Class C was for Hobby, maybe the 27MC/s Business Band was   
   Class B?   
      
    EV> I think the old 365MC/s CB was called Class A???, IIRC there were   
    EV> four Citizens Band Classes A through D, one of them was for 27.255   
    EV> Radio Control Model use that was shared with 11M Amateur Radio   
    EV> Operators back then. -snip-   
      
    RW> The FCC gave RCC more bandwidth when CB was made available.   
    RW> There are still some spaces between CB channels for that. I   
    RW> thought that 27.255 was/is channel 23 and channel 24 is 27.235   
    RW> or 27.245 on the new bandplan of 40 channels.   
      
   The 27.255 frequency is the only one that's stuck in my head, I ain't   
   up to date on anything Citizens Band as You know.   
   -snip-   
    RW>> Thus the name, bootlegger...   
      
    EV> No, Bootlegger's are anyone transmitting on any unauthorized Freq. or   
    EV> 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.   
      
   I thought we were talking about People Transmitting on some Frequency   
   that they don't have a FCC License for, whether its Outside the CB   
   Channels or On Amateur Radio Bands or any other Band.   
      
   In my mind, those folks, what ever Power Level they are using, if they   
   are not authorized by the FCC to use those freqs, are BOOTLEGGERS here   
   in the USA, plain and simple. dit dah dit dah dit dah  (PERIOD).   
   -snip-   
    EV> I've haven't got a Pink Ticket from the FCC (yet), but I did get a   
    EV> White Slip of Paper from he FCC just after I built my Heathkit DX-40   
    EV> on around September 1958.   
   -snip-   
    EV> I never could figure out why no one ever answered me on 7173 KC/s   
    EV> when I called CQ, but I made QSO's all the time on 3720KC/s just   
    EV> fine, until I got that white slip in the mail from the FCC Monitoring   
    EV> Station in Laurel, Maryland that said that my signal had been heard   
    EV> on 14.346MC/s.   
      
    RW> 8^) Was that a common problem with those radios?   
      
   The problem was with The Builder of the Kit, not the design of the Kit.   
      
   ... Why don't sheep shrink when it rains?   
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