Re: [Amps] Ampleon BLF189XR 1900W LDMOS transistor announcement

[Kevin <kstover@ac0h.net>]

W6PQL tested the NXP BLF188XR, the device he uses in his 1KW amps, and 
came up with 1100W before hitting 1dB compression and it's a 1400W 
"peak" device.
If I was building one with the BLF189XR I'd still use two devices. Run 
each at 750W out and not stress anything. Might actually get an SSPA 
that will do full legal, any mode, no time limit as long as you can move 
the heat.
The big question is the low pass filter. The single most expensive part 
of an SSPA.

On 10/17/2016 2:50 PM, Joe Subich, W4TV wrote:
> > Just search BLF189XR. Most of the search results will take you to the
> > Ampleon Press Release.
>
> This may or may not be good news for amateurs.  While the Ampleon press
> release touts 1900W peak, that is in *pulse* service which is generally
> driven hard into compression/clipping.  One would need to look at the
> data sheet to check the 1 dB and 0.5 dB compression level to see if it
> will handle 1500 W peak before reaching the 0.5 dB (preferably) or 1 dB
> (worst case) compression levels.
>
> As it stands, some unscrupulous manufacturer will certainly build a
> product around the BLF189XR and probably advertise it as a 2KW PEP
> amplifier without concern for the IMD generated just as is the case
> with several "1300 W" and "1500 W" solid state amplifiers currently
> on the market.
>
> 73,
>
>    ... Joe, W4TV
>
>
> On 10/16/2016 4:37 PM, M Gerber wrote:
> > Just came across this news release this morning.
> >
> > I have 2 very well known tube amps and built a W6PQL SSPA with a pair of
> > BLF188XR devices after one of the tube amps failed. The home-built
> > solid-state amp is a keeper and I am seriously looking to parting 
> > ways with
> > my tube amps. Instant on, no lethal HV, tons of gain (minimal drive
> > requirements) are all significant benefits. A BLF188XR is $185 from RF
> > Parts.
> >
> > The SS amp has been running very nicely now for the past 5 months. 
> > Only for
> > RTTY contesting have I needed to revert to a tube amp.
> >
> > So long as the NXP/Freescale/Ampleon conglomerate pushes the RF envelope
> > with their LDMOS transistors, we in the amateur community will stand to
> > benefit. SSPA designs will continue to improve to silence the naysayers.
> >
> > I did not include the direct link due to security/SPAM concerns.
> >
> > Just search BLF189XR. Most of the search results will take you to the
> > Ampleon Press Release.
> >
> > 73 to all--
> >
> > Mark
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
--
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps