Hi William,

The Charlize draw less tha 1Amp. A simple calculation indicate that a
9AH SLA battery could last for 10~20 hours. You may consider a larger
battery it to last longer. However, you may charge it every time after
listening. You may consider buy a better charger which can be
connected to the battery permanently.

Andy

--- In doctorjohn_CheapTubeAudio@yahoogroups.com, "NPM" <npm98@p...>
wrote:
>
> hi Andy and all,
>
> The Charlise did improved over time, very easy on the ears. Yeo
suggested
> using 12V instead, I did, but with Switching power supply, the sound
makes
> me a bit tense, though its a bigger sound.
> How long will a 12V battery last with one charging?
>
> On SET I do thing it may sound purer, but the demand on the OT and
PS is
> much more. So PP tend to sound better as most SET amps are not that
well
> made. I do find that if we make the amp simpler, actually PP could
sound
> very similar to SET, yet with the benefit of lower noise and more power.
> For example using paraphase, the front tube drive the output direct,
while
> only the opposite phase output tube will go thru phase conversion.
> Anyway, I have a Gold Baile 2A3C small SET amp with ample power. After
> tweaking a bit such as raising the current of the driver tubes,
adding some
> caps here and there, the sound is quite nice though still a trace of
hum.
> The output power is quite big surprisingly... I think it must be in the
> region of 5 watts as it could drive my Rega effortlessly. Must try
on my SMG
> to see how.
>
> On the Gryphon amp, I used to own the big stereo power amp with 3
step adj
> bias. Well, I agree that it does not have air. It is dark sounding
with no
> live. I could not listen for too long else I would feel depressed.
the amp
> is hot, and for the 1 year I owned it, 8 months was with the agent for
> servicing. Can't respect those magazine writers who said it was a
great amp!
> Same dark sound with the pre amp. Worst the volume control does not
even
> have the numeric engraved correctly! What a joke. When I solder
wires to
> connect the volume pot directly to the gain stage instead of going thru
> circuit board traces that is half the width of the pre amp, I got
more air
> and dynamics and felt like a champion. But soon a friend brought in
Classe
> DR-6 with CA 400 power amp that sounded much better then the Gryphon in
> every respect....
> but the story of the SS amp is always similar, you think you found some
> thing nicer, it will only stay for not more then 3 months until you
hated
> the sound! That's why I only listen to tubes for the last 7 years.
>
> best rgds
>
> William Lee
>
>
>
>
> ----- Original Message -----
> From: "doclowther" <doclowther@y...>
> To: <doctorjohn_CheapTubeAudio@yahoogroups.com>
> Sent: Thursday, December 01, 2005 1:10 PM
> Subject: [doctorjohn_CheapTubeAudio] Editor's Note (Re: Class T amp)
>
>
> > Dear Andy, Kharma et al:
> >
> > Of course I like the talk about the CHEAP T-amp. As a matter of fact,
> > I had to see the hype, so I got one months ago thru group order of
> > Wesley. Have not picked up yet.
> >
> > I bought the cheapest one because I believe even the cheapest can give
> > me the BOTTOM LINE. I am not interested in turning it into superamp,
> > which I doubt can happen without draculian effort. One thing, I
> > SERIOUSLY doubt even at its best it can rival a good SET amp.
> >
> > Reading some of the discussions I believe the discrepancy in
> > perception stems from personal differences as well as SETUP, which is
> > of paramount importance. The speakers better be efficient, and many
> > so-called high-efficiency speakers (like "TAD VSM300") are really not.
> > In your case, the Bastanis has an active woofer, so that's a help, and
> > you won't notice the bass deficiency so much. The situation is
> > similar to the matching of SET amps and speakers. Notice the Hong Kong
> > Tube audio idiots who write profusely that SET amps are not as good as
> > PP amps, judged all by a pair of LS3/5a. You just cannot stop
> > assxxxxs.
> >
> > The opinions seems to hint at whether the listener tolerates "clean
> > notes" with less decay. This is nothing new, even among high-priced ss
> > stuff. Some expensive ss stuff, like Gryphon, seem to have short decay
> > to me and that bothers me personally. Another is perception of "air".
> > Ditto Gryphon, regarded by ss users as "tube-like", has little air to
> > me. Another example is speakers. Take JM Lab Utopia, whether you
> > really like it will depend not a little on the slightly short decay,
> > hence "clean" sound. Digitals too, needless to say. This is perosnal.
> > For me, even CHEAP tube will HAVE to have excellent decay and bags of
> > air. "Refinement" has to come later.
> >
> > Yes, cheap can be good, but HOW cheap, and HOW good? Hmm...The search
> > is the fun part though. Just do not expect the "ultimate".
> >
>