Re: [Amps] Amp output power

["Roger (K8RI)" <k8ri@rogerhalstead.com>]

The PL172/8295As were notorious for going gassy with no use.  I still 
have 4 of the 8295A ceramic versions, one of which is in a restored HT33B.
I in addition to the 8877s and 3CX800s, I like the FU728F Chinese 
Tetrode. New version only.  Older ones/NOS suffered a high infant 
mortality rate.. I think they are close to the price of the 8877. Great 
tube, but more complicated amplifier build.  It seems that many have 
forgotten how to tune Tetrodes.  The 8877 is nice and compact.
73

Roger  (K8RI)

.
On 8/25/2015 1:13 PM, Mike Feher wrote:
> Bill -
>
> How about a pair of 4-400As as I have 10 NOS ones in original boxes. It is
> also used in my T-368F and does a nice job there. I also have a bunch of
> PL-172s or 8295s and a pair of those would make a real nice amp. I used to
> have an HT-33B that used one of those, and stock it easily put out 1.2KW key
> down.73 - Mike
>
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell, NJ, 07731
> 732-886-5960
>
> -----Original Message-----
> From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Bill Turner
> Sent: Tuesday, August 25, 2015 12:35 PM
> To: Amps group
> Subject: Re: [Amps] Amp output power
>
> ------------ ORIGINAL MESSAGE ------------(may be snipped)
>
> On Tue, 25 Aug 2015 08:51:40 -0400, you wrote:
>
> > I think I've seen, new imported 8877s of reported good quality for the
> > price of two tested, 3CX800 pulls.
> >
> > 73
> >
> > Roger (K8RI)
> REPLY:
>
> I paid just over $500 for a Pride brand (Chinese) 8877 about four years ago
> and it now has hundreds of hours of RTTY contesting on it and still has full
> output. It did arc once when it was a few weeks old and blew the AC line
> fuses. I replaced the fuses, found no other damage, and it has been perfect
> ever since.
>
> I see that Alpha has gone to a single 8877 in their top of the line
> 9500 amplifier.
>
> IMO, the best tubes, everything considered, for an amateur amplifier are
> either a single 8877 or a pair of 3-500Z's.  Opinions will vary of course,
> but for cost, availability and effectiveness either of those is hard to
> beat.
>
> 73, Bill W6WRT
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