Greetings Ed!   
      
    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.   
      
    EV>> When I first saw "12AX5s?" I was thinking about a tube such as a   
    EV>> 12AX7 which is a 9 pin minature tube.   
      
    RW>> Did I say 12ax5? There's no such tube listed in my 1977 Radio   
    RW>> Amateur's Handbook, but there is a 12AX7A listed. It is a dual   
    RW>> triode used as a class B amplifier tube.   
      
    EV> Yes, see above after my first paragraph.   
      
   BTW, there is nothing that turns up as a 12AX5 on an IP search either.   
      
    EV> Tom found a Link but the site didn't have any details about that   
    EV> tube, only the $1.00 US price per tube.   
      
   Of course not, it doesn't exist.   
      
    EV>  That's why I started wondering if you were talking about a tube used   
    EV> to Plate Modulate a CB rig, 2.5Watts, not the 500Watts needed for the   
    EV> 1KW TX used at the High School.   
      
   My TS-520 uses one in conjunction with a pair of 6146s for a final output   
   of 100 watts...   
      
    EV>> The 12AX5 wasn't in my 1976 A.R.R.L. Handbook, so I tried Searching   
    EV>> to see what kind of tube it was.   
      
    RW>> 8^)   
      
    EV>> I gave up when none of the Results for the searches I did said   
    EV>> anything for the 12AX5, all they were for were the 12AX7 tube.   
      
    RW>> Which is what I had mentioned, if I called it right. Otherwise   
    RW>> that is what I meant.   
      
    EV> See what You wrote after my First Paragraph above.   
    EV> -snip-   
      
    RW>> I remember having some tube-type Motorola VHF mobile radios   
    RW>> that I thought were too large to put in a car. They were run by   
    RW>> remote control with 99% of the radio mounted in the trunk and   
    RW>> you only had a control head and mic under the dash...   
      
    EV> You're talking about those Two Way Radios used in Police Cars, Fire   
    EV> Trucks, City Works, Taxi Cabs, etc...   
      
   And easily converted to 11/10mtrs, 6mtrs and VHF ham bands.   
      
    RW>> The Motorolas I mentioned above had two sets of crystals in   
    RW>> them. One that received the base station and one that   
    RW>> transmitted on another frequency, presumably the base station's   
    RW>> receiver, aka duplex. They had a couple of channels setup like   
    RW>> that and about 4 channels with simplex frequencies in their rx   
    RW>> and tx. That was late 50s or early 60s.   
      
    EV> A and B Channels? and they're not Duplex, they are Simplex Push To   
    EV> Talk Radios.   
      
   Like I said, easily converted for use in the ham bands, duplex and   
   simplex.   
      
    EV> Unless you got something from Motorola fancier than the usual Mobile   
    EV> Radio the Services above used in the 1960's when I was a Dispatcher   
    EV> for City Works.   
      
   A lot of those radios ended up as ham band repeaters. Not only the   
   Motorola version, but the GE radios too.   
      
    EV> IIRC those Radios came in 30Watt, 60Watt and sometime in 1965 the   
    EV> City bought some General Electric 100Watt Mobile Radios. -snip-   
      
   And when Motorola and GE went to solid state radios, and the tube types   
   became obsolete, all were sold as surplus. So business band and ham band   
   radios used then were what you were using prior to their sale as surplus.   
      
    EV>> If the USS Enterprise video You saw showed 'Radio One' You probably   
    EV>> saw one of those Patch Panels. What was nice about them was the Male   
    EV>> N?? Connectors had a collar that was pulled back to connect to the   
    EV>> Female Connector on the Panel. A lot easier than twisting the collar   
    EV>> on a PL-259 on to a SO-239. -snip-   
      
    RW>> To me, the male N connector is more complicated to connect to a   
    RW>> female N connector than a 259 does with the 239 female   
    RW>> connector. At least it is straight forward to me as to who gets   
    RW>> what.   
      
    EV> Outside of the Ships I were on I have never seen a N Connector   
    EV> manufactured as I described above - with a Collar that was Pulled   
    EV> Back, Push the Connector On the Female N Connector on the panel, and   
    EV> Release the Collar and the built in spring pushed the Collar forward,   
    EV> and it moved forward it pushed some Ball Bearings into the Recess on   
    EV> the Female Connector to Lock it in place. To Remove the Patch Cable   
    EV> from one place to another, Pull Back the Collar and Pull the Cable   
    EV> Off the Female Connector.   
      
   Those were merely a military version of what was/is available to the   
   general public. i.e. at the time, the company I worked for provided what   
   was called MilSpec switches for use in submarines, tanks, etc.. Unlike   
   their civilian counterpart, these were sealed to eliminate any sparks   
   from igniting any fumes or gases that may be in the sub's atmosphere, thus   
   providing a safer underwater switch.   
      
    EV> The N Connectors I've seen in Civilian Life had Screw Threads just   
    EV> like the PL-259/SO-239 Connectors that most equipment I've seen have   
    EV> on 'em. -anip-   
      
   Sure and if you go to a military surplus sale, you can get those pretty   
   cheaply for civilian use. All that connector did was insure that the   
   connection wasn't severed during times when your ship was in rough water,   
   or in a battle stations situation and provided a quick connect/disconnect   
   if you needed to switch antennas.   
      
    EV>> But it is on Amateur Radio Frequencies, and those 'Electronic   
    EV>> Hobbyist' that used Yesau Tranceivers, and probably still do on our   
    EV>> Ham Bands fit the Description above.   
      
    RW>> Well, I don't have a Yesau xceivr, but I do have a Kenwood   
    RW>> TS-520 which is in the same ballpark as say, a Yasau 101?. I   
    RW>> never did see any advantage to building something I can buy off   
    RW>> the shelf. That would be like building a Model K Ford when   
    RW>> there are much better models offered for sale.   
      
    EV> I met someone who like his Yesau FT-??? because he could run 100W AM   
    EV> on 11 Meters, the guy really bragged about his rig.   
      
   That's an FT-101, which had provisions to R&R a Xtal on the fly.   
      
    EV> During that time frame I noticed the FT-xxx XCVRS still had a   
    EV> position on their Band Switch for the Old 11 Meter Ham Band, and the   
    EV> TS-xxx rigs didn't have that selection on the Band Switch on the   
    EV> front panel.   
      
   Correct, the TS rigs had to have some surgery done to one of three xtals   
   and a tune up to go there. The trick was to remember which of the 3 10mtr   
   positions on the switch was modified. Yaesu just made it easier to do.   
      
    EV> I knew someone with a TS-520 and learned it was a read good rig, so   
    EV> in the 1970's I got a TS-520S and added the DS-1A DC To DC Convertor,   
    EV> and bought a Cinch-Jones Connector - Wired it to the Physical   
    EV> Connections on the C-J Connector, not the Pin Numbers from the   
    EV> Kenwood Schematic for their Connector manufactured for them in Japan,   
    EV> and went Mobile with my rig. -snip-   
      
   8^) If you had bought a plain old TS-520, like mine, that is already built   
   in to it. My mobile connector is still in the original packaging because   
   it wasn't really suited for mobile use, imo...   
      
    EV>>> ... Why don't sheep shrink when it rains?   
      
    RW>>> They're pre-shrunk. Sheep used to be the size of a camel.   
      
    EV>> Hey!, that's nice, I like that.   
      
    RW>> Just don't take up smoking sheep's wool...it smells just as   
    RW>> bad.   
      
    EV> Nine Months after I started Smoking, I Quit to save $25.00 US to send   
    EV> off for a Heath-kit VX-1 Electronic Voice Control (VOX) to use with   
    EV> my DX-40. I didn't like the way the Relay dropped out and back in as   
    EV> I was talking, so I used it for awhile as a Transmit On/Off switch by   
    EV> turning the knob on it.   
      
   I bought a VOX for my Icom UHF walkie talkie that has been used and used   
   and used somemore. But as the crowd that I hung out with in San Diego   
   dwindled to just three of us, it got put away. It is now in storage with   
   that walkie talkie, just to keep track of it. It has lost a labling tag   
   that told you what switch is what, but that has come unglued and lost. I   
   used to run into it while rummaging through my junk box, but haven't seen   
   it in a while. My TS-520 has a VOX built into it, which makes life easier,   
   but I always preferred to use the foot switch I installed in the mic cord,   
   years ago. That VOX always seemed to be tripped by the background noises   
   in the house.   
      
       Have a day!   
      
            R\%/itt - K5RXT   
      
   --- GoldED+/W32 1.1.5-31012   
   --- D'Bridge 3.99   
    * Origin: HAM Radio, aka Amateur Radio. 804? Over! (1:387/22)