A high power RF LDMOS transistor

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This transistor looks interesting:


<http://www.nxp.com/products/rf/rf-power-transistors/rf-broadcast/1500-w-cw-over-1.8-500-mhz-50-v-wideband-rf-power-ldmos-transistor:MRF1K50H
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Subject: Spelling Lesson

The last four letters in American.........I Can
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Re: A high power RF LDMOS transistor
Michael A. Terrell wrote...
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<http://www.nxp.com/products/rf/rf-power-transistors/rf-broadcast/1500-w-cw-over-
1.8-500-mhz-50-v-wideband-rf-power-ldmos-transistor:MRF1K50H>

 Given the high advertised power levels, 1.5kW,
 the low 50V maximum voltage rating is an issue.
 That'll be a high impedance ratio to 50 ohms.

 BTW, November is Trump extermination month.


--  
 Thanks,
    - Win

Re: A high power RF LDMOS transistor
On Saturday, August 27, 2016 at 12:57:34 PM UTC+10, Winfield Hill wrote:
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Can't we move it forward? Tuck Frump!

--  
Bill Sloman, Sydney

Re: A high power RF LDMOS transistor
On 27/08/16 12:57, Winfield Hill wrote:
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Only $300 a piece, what a bargain :)

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Our radio club is selling off TV transmitter modules based on
this (lesser but similar) chip. The boards test out ok, but
relied on large water-cooled heat-sinks. 200MHz and 500W out
at 50Vds (but broadband; they work fine at 144MHz):

<http://www.ampleon.com/documents/data-sheet/BLF278.pdf

The data sheet shows schematics for 108MHz, and I can show
photos of the boards we have here. The output from the
drains is clearly *very* low impedance, so you might like
to see the matching circuit and layout.

They run in class AB, so very high power consumption.
The pre-amp is similar, based on an MRF182 (30W), which
drives six PA modules. The MRF182 stage is also class AB,
dissipating 60W quiescent, and in turn is driven by an
MHL8118 (1W out, and also very inefficient).

The set of six output stages with the two pre-amps puts
out 960W RMS continuous, based on a scary 50V 120A supply
direct from 415V three-phase.

Clifford Heath.

Re: A high power RF LDMOS transistor
On 26 Aug 2016 19:57:15 -0700, Winfield Hill

[snip]
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The expected response from a senior member of the leftist elite.
        
                                        ...Jim Thompson
--  
| James E.Thompson                                 |    mens     |
| Analog Innovations                               |     et      |
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Re: A high power RF LDMOS transistor
Jim Thompson wrote:
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Well I'm not one of those and I think he's crap.  He's just not as bad  
as the other piece of crap.

The fact that we are unable to pick from among the best people because  
they don't even bother running, and we can't even pick the best of those  
that do run, makes me feel almost as bad as I would if my country was  
destroyed or conquered.  It's just a lesser form of catastrophe because  
it only gets worse.

The real problem is that democracy doesn't work.  There might be no  
better way to protect freedom, but that doesn't mean it works.



Re: A high power RF LDMOS transistor
On Sat, 27 Aug 2016 17:19:43 -0400, "Tom Del Rosso"

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We seriously need a shake-up and toss out some _career_ politicians,
otherwise we're headed to a dictatorship... which we'll have by the
end of Queen Hillary's reign :-(
        
                                        ...Jim Thompson
--  
| James E.Thompson                                 |    mens     |
| Analog Innovations                               |     et      |
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Re: A high power RF LDMOS transistor
Jim Thompson wrote:
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But who's going to toss them out?  The same idiot voters who put them  
in?  They complain about who's in office with a downright weird  
unawareness of how they got into office.  They are simply too stupid to  
pick the good from the bad.  They are too stupid even to realize that  
they are in charge, and that they are at fault for everything they  
complain about.


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Yes, it's apparent from events of recent years that they only stopped  
saying "pigs" for the same reason they stopped saying "groovy".




Re: A high power RF LDMOS transistor
On Sat, 27 Aug 2016 17:52:20 -0400, "Tom Del Rosso"

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Throw the current bums out and replace them with new bums.  Sounds
good to me (they will always be bums).  Just think about it as "term
limits", without the Constitutional problems.
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Except they didn't stop saying "pigs".  Certainly you've heard the
Democrats war chant; "Pigs in a blanket - fry 'em like bacon."


Re: A high power RF LDMOS transistor
krw wrote:
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When only land-owners voted they didn't elect bums.  They elected the  
best people, which should be the obvious thing to do, but it's not  
obvious to the average dope.





Re: A high power RF LDMOS transistor
On Sat, 27 Aug 2016 19:29:01 -0400, "Tom Del Rosso"

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Do you really think Iowa farmers will vote against corn subsidies?

Re: A high power RF LDMOS transistor
krw wrote:
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No, but I think they wouldn't have enough voting power without the  
support for corn subsidies that comes from other voting blocks.  And  
each farm would account for only one vote or maybe two.

But you are just reinforcing my point that the people are responsible  
for the problems they complain about.  "Throw all the bums out" is the  
eternal cry of those too lazy and stupid to learn which ones are bums  
and which aren't.

The "Rock the Vote" campaign probably encouraged a lot more stupid  
people to vote for the first time.  Maybe a campaign that says "Please  
don't vote if you are an idiot" would encourage at least a few of them  
to abstain.  Every bit can help.




Re: A high power RF LDMOS transistor
On Sat, 27 Aug 2016 20:02:16 -0400, "Tom Del Rosso"

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Exactly how does limiting voting to land-owners turn off the money
machine?

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Now, you're not making any sense.  I only have one vote.  The problem
is that "vote the bums out" isn't universal.  Too many rent-seekers.

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But they can't get free shit, then.  No different than the Iowa
farmers.  Well, except that Iowa farmers actually contribute to
society.

Re: A high power RF LDMOS transistor
On Sunday, August 28, 2016 at 7:52:25 AM UTC+10, Tom Del Rosso wrote:
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Most countries have strict rules about how much can be spent on political a
dvertising. US elections are strongly influenced by well-funded advertising
 campaigns, some of them propagating total nonsense - remember the "Swift B
oat People" lies that converted John Kerry's edge over Dubbya - decorated V
ietnam veteran versus draft-dodger - into a disadvantage.  
  
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It's difficult to like police who shoot members of minority groups in dispr
oportionate numbers. The Democrats would like the police to be better paid,
 better trained and better educated, but the Republicans think it more impo
rtant to keep taxes low.

--  
Bill Sloman, Sydney


Re: A high power RF LDMOS transistor
On Sat, 27 Aug 2016 17:57:45 -0700, bill.sloman wrote:

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It is.


Re: A high power RF LDMOS transistor
On Sunday, August 28, 2016 at 9:56:46 PM UTC+10, Cursitor Doom wrote:
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Until you run into one of the less-well educated cops.

--  
Bill Sloman, Sydney

Re: A high power RF LDMOS transistor
On 28/08/16 13:30, snipped-for-privacy@ieee.org wrote:
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An acquaintance of mine was talking to a cop in
Louisiana (IIRC). The cop said "now don't you go
fooling me boy" and inspected his documents.

It was several hours before he twigged the cop was
illiterate.

Not a good starting point for the correct enforcement
of the law.


Re: A high power RF LDMOS transistor
On Sun, 28 Aug 2016 05:30:43 -0700, bill.sloman wrote:
  
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Cops don't need to be educated. That's why a lot of thickos join the  
police in the first place.

Re: A high power RF LDMOS transistor
On Sat, 27 Aug 2016 17:52:20 -0400, "Tom Del Rosso"

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Indeed.  The only thing Obama is right about is that we are no longer
an exceptional country.  We've become a nation of village idiots,
manically clutching their "smart" phones... knowing absolutely no
history, no math or science... not even knowing who their current
politicians are... waiting for their free lunch, college "education",
higher minimum wage, and trigger warnings.  Boy are they in for a
surprise when they finally realize the lies were just to buy their
vote!

For a combination of hysterical and sad, watch a "Watter's World"
segment on Fox News Network (usually during O'Reilly).

Quoted text here. Click to load it
        
                                        ...Jim Thompson
--  
| James E.Thompson                                 |    mens     |
| Analog Innovations                               |     et      |
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Re: A high power RF LDMOS transistor
On 28/08/16 14:53, Jim Thompson wrote:
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That's my fear w.r.t. Brexit.

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