[Amps] Question about SPE 1.3K-FA amplifier

[Leigh Turner]

Well Dick that backorder scenario is merely an indication that folk like SS
amps and because there's currently not many well designed high-performance
rugged and bullet-proof SS amps in the market to compete with the early
entrant :-(

That will change...

Leigh
VK5KLT

-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Richard Solomon
Sent: Tuesday, 10 November 2015 9:31 AM
To: amps at contesting.com
Subject: Re: [Amps] Question about SPE 1.3K-FA amplifier

Considering the 9-10 month backlog of orders, there must be a lot of folks
who have ..."lost all their good sense"....

73, Dick, W1KSZ

On Mon, Nov 9, 2015 at 2:33 PM, Leigh Turner <invertech at frontierisp.net.au>
wrote:

> 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 at contesting.com] On Behalf Of Jim Thomson
> Sent: Monday, 9 November 2015 9:45 PM
> To: amps at contesting.com
> Subject: [Amps] Question about SPE 1.3K-FA amplifier
>
> Date: Sun, 8 Nov 2015 06:59:35 -0700
> From: Richard Solomon <dickw1ksz at gmail.com>
> To: Amps group <amps at 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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