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

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