Greetings Ed!

 RW>> It probably won't interfere with a standard TV either. At least
 RW>> not one of recent manufacture.

 EV> If I did try using the Sixer again I would talk to my neighbor first
 EV> to ask them to let me know if I was causing any RFI to them.
 EV> -snip-

Good idea to give them a heads-up before they're wondering what's
happening.

 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.

The tube I mentioned would have come after the 833s.

 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.

 EV> Sure, a Rack that tall could hold a lot of equipment, I could put
 EV> my old Hallicrafter SX-42 and Heath TX-1 "Apache" and have room to
 EV> spare to put a Antenna Tuner that uses Plug In Coils and still space
 EV> for other things, if I had them, to mount in the cabinet.

When I aquired my Motorola repeater, it was mounted in a cabinet that
big. Space in a mtn top facility also includes height limitations on the
equipment housing. I removed everything from that cabinet to one half
its size. It was stuffed with everything needed to be self contained, even
the tuned cavities.

Having previous experience with a club repeater on a mtn top in this type
of cabinet, I know what it's like to travel 40 miles one way, traveling
in freezing rain to service a repeater that a mouse had built a nest in
the pwr supply. So I didn't want to have to do that with my repeater. It
was still on Mt Palomar with a different IDer when I was last in SD...

 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...

 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.

I'd love to have one of those Patch Panels...

 EV> IIRC Each Column was for a certain Frequency range.

 EV> I don't know if anything like a Tuned Cavity was in the Panel, I just
 EV> thought Filters were inside the Panel, but each CW Operator position
 EV> had Full Break-In.

A tuned cavity is a filter. Most repeaters have two for each rx/tx in the
system. One pair for each rx/tx is tuned to allow a frequency to pass and
it will block all others. Mine were tuned to pass 449.125tx and the
other pair were tuned to pass 444.125 and block all others.

I had a friend who was a mtn-top technician and he had the equipment to
tune cavities like that, so he tuned mine. His repeater and mine were
linked together, but his was on Mt San Miguel.

 EV> The TXs were in different compartments aboard ship and not in
 EV> Main Comm, or close to it.

I watched a programm that covered the USS Enterprize from pre-WW1 to
present day. They showed all of or most of that during the program, which
was on the Smithsonian channel.

 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?

 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-

That sounds like a 'waveguide' setup, which would be used in a radar
system.

 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.

I wonder if they had a means to test those tubes in case they might be
needed as a backup...Or did the Navy supply have tons of them, like their
toilet seat supply?

 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?

I remember seeing Class A - I forget?, when I looked for the CB service,
aka Class D...

 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.

 EV> The 27.255 frequency is the only one that's stuck in my head, I ain't
 EV> up to date on anything Citizens Band as You know.
 EV> -snip-

It's not in my head either, but I do recall that one or two channels that
were added to the original 23 on the 40ch update, fell between channels 22
and 23...

 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.

 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.

That has been going on for decades. i.e. Commercial fishermen using CB
channels, even though they have a license to use 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-

I would call someone with a CB radio who advertises a business over the
air a bootlegger. Since there is no requirement to be licensed to use CB,
they're not bootleggers until they do something like that.

 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.

 EV> -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
 EV>> Monitoring Station in Laurel, Maryland that said that my signal had
 EV>> been heard on 14.346MC/s.

 RW>> 8^) Was that a common problem with those radios?

 EV> The problem was with The Builder of the Kit, not the design of the
 EV> Kit.

Don't feel bad Ed, I did somoething similar with my first Allied Radio
stereo amplifier kit, c1960. I sent it to AR for service and they fixed my
screw up...

 EV> ... Why don't sheep shrink when it rains?

They're pre-shrunk. Sheep used to be the size of a camel.


    Have a day!

         R\%/itt - K5RXT

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