I hear complaints about various amps having loud cooling fans. Well, I am a
real ham and I always use HEADPHONES, so fans do not bother me at all. The 2K
is only on high volume more than 30 sec. when run at 2K plus in RTTY. Surprise
yourself and run it at MID and see you make the same number of contacts. 73,
Charly
> From: w9ac@arrl.net
> To: amps@contesting.com
> Date: Tue, 15 Sep 2015 11:30:05 -0400
> Subject: Re: [Amps] Alpha 9500 Repair
>
> Bill,
>
> The two components mentioned are sourced up through the +40V supply. So,
> I'm not at all surprised an 8877 arc or K-to-grid short took out the supply.
>
>
> Pricing of the SPE 2K-FA is a bit more than the 9500 and looks like a good
> alternative. My only reservation about commercially-available SS amps is
> that cooling is still relatively inefficient -- and loud in high duty-cycle
> modes. Having a LAN-enabled remote head would be a nice way to deal with
> the noise issue.
>
> I own the SPE 1K-FA and if the 2K-FA's fault protection scheme is similar,
> the PA and power supply are very well protected from a number of fault
> conditions.
>
> Paul, W9AC
>
> -----Original Message-----
> From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Bill Turner
> Sent: Tuesday, September 15, 2015 11:10 AM
> To: Amps group <amps@contesting.com>
> Subject: Re: [Amps] Alpha 9500 Repair
>
> ------------ ORIGINAL MESSAGE ------------(may be snipped)
>
> On Mon, 14 Sep 2015 23:57:41 -0700, you wrote:
>
> > Aside from that, they really should have designed it, such that
> >components don't blow up with a simple cathode to grid short, int or
> >hard fault.
> >
> >Jim VE7RF
>
> REPLY:
>
> Agreed. Arc protection is a weak point.
>
> I have owned two 9500's. The first one, about four years ago, arced when it
> was a few months old and blew out the 40 volt supply. The factory repaired
> it under warranty and even paid for shipping both ways. My second one, a
> used one less than a year old, has been flawless so far, but I see the
> factory no longer pays shipping if it fails under warranty.
>
> I'm hoping Alpha cones out with a brick-on-the-key solid state amp.
> Done right at the right price, that would be a world beater. A pair of
> BLF188XR's costs about a third of an Eimac 8877 and is rated at 2800 watts
> PEP. Going with four of them to be conservative would be my suggestion and
> still costs less than an 8877. No warm up, no tuning but does need an
> antenna tuner.
>
> If Alpha is not interested, here's an opportunity for an entrepreneur to
> start a new world class company in their garage. The technology is already
> known, it just takes someone to put it to work.
>
> 73, Bill W6WRT
> _______________________________________________
> 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
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|