### They rate the SPE 1.3K-FA amp at up to 1500w pep out on ssb. That’s
absurd.
It would be an IMD garbage truck if run at that po.
http://www.expertampsusa.com/wp-content/uploads/2015/02/EXPERT_1.3K-FA-manual-rev.1.0.pdf
## Who is going to repair your amp when it blows up ...esp with no schematic
available ?
### The SPE 2.0K-FA isnt much better..rated at 2.0 kw pep out..using just 6 x
MRF-151Gs.
They are only rated for 300w each, maxed to the peg. The higher voltage
version of a
MRF-151G is called a VRF-151G. And two of those are used in the ARRL 250w
pep out amp.
Two of em run very clean, IMD wise..at 200-250w pep out. A friend built that
amp, and it works
very well.....when run at 200-250 pep out.....and not the 600W absolute max
rated output.
## Even maxed to the peg, 6 of em would be good for 1800w....not 2000. On
ssb, 6 of em would be clean
at 600-750w pep out, that’s it. At the claimed 2000w pep out on ssb, again,
it would be very poor
IMD products.
http://www.expertampsusa.com/wp-content/uploads/2014/12/EXPERT2K-FA-EN-rev.1.0.pdf
## Is anybody really impressed with the .... 35,000 lines of code built into
the cpu on these things ??
Jim VE7RF
From: Charles H
Sent: Monday, November 09, 2015 3:17 PM
To: Leigh Turner ; 'Jim Thomson'
Cc: amps@contesting.com
Subject: SPE amplifiers
I do not read any specs except the output power.
I will never repair my 2K myself.
I enjoy its results and smile while I get 'em first call.
73, Charly
> From: invertech@frontierisp.net.au
> To: jim.thom@telus.net
> Date: Tue, 10 Nov 2015 08:03:50 +1030
> Subject: Re: [Amps] Question about SPE 1.3K-FA amplifier
> CC: amps@contesting.com
>
>
> Hi Jim,
>
> I fully concur with all of your points below.
>
> Someone would have to have lost all of their good sense to even consider
> buying an amplifier without a complete set of detailed schematic diagrams
> and associated Parts List. It is the ultimate insult to their customers and
> the epitome of arrogance for a manufacturer not to do so.
>
> To be considerate of other band users, one would have to operate the 1.3K-FA
> "linear" amplifier with considerable Po back-off below the amp's rated 1300
> Watts PEP that's well clear of its 1 dB power compression point and
> saturated Po to yield any half-decent / semi-respectable IMD figures.
>
> Leigh
> VK5KLT
>
> -----Original Message-----
> From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Jim Thomson
> Sent: Monday, 9 November 2015 9:45 PM
> To: amps@contesting.com
> Subject: [Amps] Question about SPE 1.3K-FA amplifier
>
> Date: Sun, 8 Nov 2015 06:59:35 -0700
> From: Richard Solomon <dickw1ksz@gmail.com>
> To: Amps group <amps@contesting.com>
> Subject: Re: [Amps] Question about SPE 1.3K-FA amplifier
>
> Here is a link to what looks like the Test Report for
> FCC Type Acceptance.
>
> https://fccid.io/pdf.php?id=2443307
>
> Curious as to what folks think about the results.
>
> ## This is almost as good as an arrl report for basic stuff.
> Their test method seems a bit flawed imo. You can't test
> any linear amp, by stuffing a 2 tone signal into the mic jack.
> Unless the xcvr is running in class A. In this case, the icom 7800
> used for the test, afaik, does not run class A.
>
> ## If SPE cant / doesn't want to provide a schematic for this amp,
> or any of their other amps, I would not touch it, or buy one.
>
> ## at least they provide imd info for imd3 to imd11.
>
> ## The imd test is further flawed.... since they only ran the test at 1000
> w pep out. The harmonic test was run at 1300w out. They are also stated in
> db below pep, and not db below one tone. So u have to subtract 6 db from
> all their tables. IE: their IMD3 on 7.150 mhz is a lousy -27.6 db. (and a
> lousy -24.8 db on 160m and also 10m). Again, re-run the test at 1300w pep
> out, and imd results will be a helluva lot worse.
>
> ## They need to re-run the test, this time using TWO xcvrs, each feeding a
> cxr into a hybrid etc, then into the input of the amp.....and do it with the
> amp running 1.3 kw pep out.
>
> Jim VE7RF
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>
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>
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