[Amps] RF2K+ LDMOS linear

[Steve London]

I would not declare tube amplifiers dead until a legal limit, SS 
amplifier repeatedly proves itself in serious contest conditions. I'm 
not talking about the guy who casually makes 500 search-and-pounce 
QSO's. I'm talking about the balls-to-the-walls, SO2R, all-band guy/gal 
who operates close to 48 hours, running stations the entire time. 
Mistakes happen under these conditions - ooops, forgot to change the 
tornado tuner on the 80 when moving from 3700 to 3800, etc. Or, RF from 
one amp gets into the other amp and fools it's microprocessor.

The only production SS amp that has come close to proving itself under 
there conditions is the SPE line. Even they aren't perfect. See 
http://www.3830scores.com/showrumor.php?arg=leadzTgmmcvix . That was an 
SPE 2K. In all fairness to SPE, see 
http://www.3830scores.com/showrumor.php?arg=lua4zPgqvqmsK . A pair of 
SPE 1.3K's that worked flawlessly. (However, not at the legal limit.)

I would love to borrow a pair of these RF-Kit amps and put them to 
serious use in one of my SO2R contest efforts.

73,
Steve, N2IC


On 06/04/2017 07:01 AM, Jim Thomson wrote:
> Date: Fri, 2 Jun 2017 19:59:34 -0700
> From: Mark Mumaw <nu6x at esedona.net>
> To: amps at contesting.com
> Subject: [Amps] RF2K+ LDMOS linear
>
> <I would like to clear up the information on the RF2K+ by RF-Kit.de in
> Germany.
>
> I have tried to join the list but have not been able to get confirmation.
>
> If this message goes through I will followup with another message
> answering  the questions I have seen here.
>
> BTW, I am not an Agent or Employee of RF-kit.de. I have built several of
> these linears and I have volunteered to help with the English version of
> the Manual.
>
> Mark NU6X  Sedona, AZ
>
> ##  At  $2685.00  to  $2985.00   +  another $270.00  for shipping + misc parts  =  $3255.00
> for the amp + tuner, + shipping, raspberry pi3  for the full blown version.
>
> ##  At that price point, this now spells the end of the tube era.   Done, finished.  End of story.
> SS   160-6m Auto tune amp, auto tuner, no expensive tubes to buy, super light weight etc.
>
> ##  No auto tune tube amp covers HF + 6m.   To get  HF  + 6m  from say Alpha, with 2 of their alpha amps,
> you could  buy 4 of these  SS amps, and have $ left over.
>
> ##  The ameritron AL-1500   lists for  $4295.00  + shipping...doesnt have 6M, no auto tune, no auto tuner...so its toast.
>
> ##  alpha  9500  lists  for  $7995.00  + shipping.  No 6m.  No auto tuner.   Its now toast.
>
> ##  alpha  8406 manual tune 6M amp.  $4995.00  + shipping.   Toast.
>
> ##  all these current tube amps are now kaputsky.    Emtron is already doa.  Eimac has priced themselves into oblivion.
> If the chinese stop making tubes, your tube amp will become a door stop.   Get rid of it while you still can.   Hats off to the
> german folks who have now put the final nail in the coffin of the tube era.
>
>
> Jim   VE7RF
>
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