On Sun, 13 Feb 2005 07:09:44 -0800, Jay in the Mojave
wrote in :

Hello Frank:

Yes we did have better luck goin the single phase route. But do have
single and three phase avialable.

After making a new type of quad/yagi type of beam for 2 meters and
listening in on the ZOO channel 147.435 MHz and a few other Los Angles 2
meter repeaters I heard a conversation talking about a 10KW broadcast
transmitter that had some sort of shipping and or fire damage, but the
power supply was in good shape, down in San Pedro California. I called
the guy and will have the place and insurance point of contact Monaday.
But it does use 220 or 240 single phase, we will see.

If this was really for a 10 KW Transmitter tha used a pair of 3CX3000 or
a single 3CX6000 then this may be the ticket.


The problem is that you are getting into a power range that usually
requires custom-built components. It would be much easier to build up
a transmitter around a 10kW transformer, instead of building it up
around the tubes which are pretty much standardized components.

But why are you even messing with triodes? Unless you like to
constantly readjust the neutralizing cap, or you run them grounded
grid and pump in a kW or so, you might be much better off with a
couple large tetrodes. Broadcast pulls are cheap, in regular supply,
are usually 80%+, and will last a long time running them AB1 which
requires almost no drive power at all. Get even bigger tubes and you
can reduce the heater voltage which will make the tubes last even
longer. Plus, if you use resistance coupling then you can open up the
input bandwidth -and- disregard the need for neutralization, with much
better efficiency and longer tube life than grounded-grid triodes.

Just something to think about.




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Hello Frank:

Yeah ok on the Triodes, there were dirt cheap, so thats what we are
using them. They will need a significant driver buts thats easy.

I have the power supply setting in my front yard setting on a pallet,
with a tarp over it now. Loooooooooooooong story!

The power levels this will generate will be no dought be significant and
larger than I care to admit to, and coax and connectors will be used.

This isn't for use as a on the air linear amplifer, but for spectral
analyst for mining. In the Mojave Desert of course. Enough said. I don't
know what would be used as coax and a matching section for antenna at
these power levels. But can only image that it would be big bucks
incorporated. With many Capital Dollars signs.

I also have a line on a 10KW radio station in Bishop California. But
probably will not need it. If this amp is able to produce the arc for
spectral analysts chamber as we think it will, it will allow a new
concept in mining. The real ball cruncher here will be the diesel
generator that must be flown in or a Bull Dozer will be needed to make a
road into the area at a truck load of money.

If the process works as we think it will a professional amp will be
bought later on But only after the process is verified, but when
starting out cheap and inexpensive methods must be taken.

Jay in the Mojave


Frank Gilliland wrote:

On Sun, 13 Feb 2005 07:09:44 -0800, Jay in the Mojave
wrote in :


Hello Frank:

Yes we did have better luck goin the single phase route. But do have
single and three phase avialable.

After making a new type of quad/yagi type of beam for 2 meters and
listening in on the ZOO channel 147.435 MHz and a few other Los Angles 2
meter repeaters I heard a conversation talking about a 10KW broadcast
transmitter that had some sort of shipping and or fire damage, but the
power supply was in good shape, down in San Pedro California. I called
the guy and will have the place and insurance point of contact Monaday.
But it does use 220 or 240 single phase, we will see.

If this was really for a 10 KW Transmitter tha used a pair of 3CX3000 or
a single 3CX6000 then this may be the ticket.



The problem is that you are getting into a power range that usually
requires custom-built components. It would be much easier to build up
a transmitter around a 10kW transformer, instead of building it up
around the tubes which are pretty much standardized components.

But why are you even messing with triodes? Unless you like to
constantly readjust the neutralizing cap, or you run them grounded
grid and pump in a kW or so, you might be much better off with a
couple large tetrodes. Broadcast pulls are cheap, in regular supply,
are usually 80%+, and will last a long time running them AB1 which
requires almost no drive power at all. Get even bigger tubes and you
can reduce the heater voltage which will make the tubes last even
longer. Plus, if you use resistance coupling then you can open up the
input bandwidth -and- disregard the need for neutralization, with much
better efficiency and longer tube life than grounded-grid triodes.

Just something to think about.

On Mon, 14 Feb 2005 19:34:12 -0800, Jay in the Mojave
wrote in :

snip
The power levels this will generate will be no dought be significant and
larger than I care to admit to, and coax and connectors will be used.


Coax? .....uh, I hope you are planning on hardline.


This isn't for use as a on the air linear amplifer, but for spectral
analyst for mining. In the Mojave Desert of course. Enough said. I don't
know what would be used as coax and a matching section for antenna at
these power levels. But can only image that it would be big bucks
incorporated. With many Capital Dollars signs.

I also have a line on a 10KW radio station in Bishop California. But
probably will not need it. If this amp is able to produce the arc for
spectral analysts chamber as we think it will, it will allow a new
concept in mining.


I'm not clear about your plan, but if you're thinking NMR then it's
already been tried with dismal results. The problem is that most
minerals have enough conductivity to render the results useless. But
if you figured out a solution then go for it.


The real ball cruncher here will be the diesel
generator that must be flown in or a Bull Dozer will be needed to make a
road into the area at a truck load of money.


How about a PTO generator? You can take 10-25kVA right from the truck.




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