Just beginning to wonder...perhaps there is still time to choose.
cheers, Ian
Stick with tubes - they can handle the heat ;-)
--
Gregg
*It's probably useful - even if it can't be SPICE'd*
It's like this, Ian - both places do live shows, both places have the "club"
sound PA's, the only difference is in hell they use old Crowns (SS) &Pyles
in sidefills, with the sound guy drinking beer off at the bar, and in heaven
they have tose skating-rink horns everyone loves so much, with EV's covering
the bottom end, all, of course, driven by single-ended 300BWHTXZ amps, with
quad-fillar edge-wound OT's. Oh, and of cours, the vocalists all use either
Hitler RCA's or some funky Tele cap mikes... They stick to 57's/ 58's in
hell...
-dim
Ian Iveson wrote:
> What kind of audio systems do they have in these places? Or perhaps
> they just do live performances?
Hell has the same audio systems we have here, just the program material
is custom-tailored for the "client." Classical-lovers have to listen to
scratchy records of Donny and Marie, Britney Spears, and BackStreet
Boys. Country-lovers get Al Dimeola. Heavy Metal lovers get Vivaldi.
Hard-rockers get Enya. And people who love all kinds of music get 101
Strings.
Heaven doesn't need audio systems. Given that the Music of God is
silent, the most sublime music is directly beamed into the consciousness
of the listener.
> Just beginning to wonder...perhaps there is still time to choose.
Then there's purgatory... where you have to listen to poorly-made
reissue CDs on "400w" multimedia speakers, turned to max. If you lose it
and throw the thing against the wall in a fit, you go to hell. If it
burns out before you do, you go to heaven.
:)
Fred
--
+--------------------------------------------+
| Music: http://www3.telus.net/dogstarmusic/ |
| Projects, Vacuum Tubes & other stuff: |
| http://www.dogstar.dantimax.dk |
+--------------------------------------------+
You trying to stir something up Ian ??
Been scudding around RAT for a few months now. In neutral. Just letting it
pull me along. Year or two ago it was good. Now ? Blue glows in 6L6GCs ?
How to bias an ST70 ? What colour is
best for me Hardon Cartoon chassis ? Can I use a 26" CRT as a phase
splitter ? I've found this NOS television EHT rectifier which looks ideal
for an SE amp !!!
S'pose you get these quiet spells now and again.
Tim's finally found the relationship which says height x diameter x heater
wattage = big noise, and Patrick's going for an attenuator with relays
so he can turn the volume up. Fred's updated Dogzilla which has 1200V
across it, uses 4 valves and achieves a gain of about x12 as far as I can
see.
ABSE is currently discussing the gun laws in Massachussets.
In Europe we're discussing combat losses since WW1 due to 'friendly fire'.
(if America's in it, you're as likely to catch it from the back as the
front)
Signing off. It's probably me. Just seems to have gone a bit stale.
jim
jim wrote:
>[...]
> Fred's updated Dogzilla which has 1200V
> across it, uses 4 valves and achieves a gain of about x12 as far as I can
> see. [...]
ROTFL! Nice to see you back with your signature dry humour. ;-)
I'm afraid that it's actually even worse than that. The "small amp
emulator" to which I presume you're referring actually has a voltage
gain closer to 1/12 rather than 12 (I make this sound groovy in the html
by calling it "insertion loss". And the other two valves (compressor
amp/ rectifier) have a AC signal gain of approximately zero.
Ah yes, it's a dirty, thankless job, building an amp using 19 valves and
weighing 75 pounds, with an output power that could have been
accomplished with a couple STK's. But someone's gotta do it! :)
Cheers,
Fred
Heaven is a techy second-hand bookshop, with vinyl playing through a
McIntosh K107 running into 20ft long (sorry, 6m) cinema horn. There is
acrylic fur on the floor (British Racing Green) and Calgary Beach, Island of
Mull, Scotland at one end of the shop, with unlimited free cappucinos and
Lindt plain chocolate at the cafe at the other end.
Hell is a skinhead with a very bad in-car system, rated in "git" watts,
playing rap, who is utterly unconvinceable that the output of his system is
limited by Vsquared/8R, where V is the internal supply voltage after the
converter in his amplifiers. (They always deny the factor of eight).
Nick Sheldon
What's so bad about this?
;-)
Tim
Listened to some Beethoven not too long ago
--
"If God didn't want us to eat in Church, He would've made gluttony a sin."
- Homer Simpson
Somewhere deep in the culture of England, implicit in Radio 4's
"Desert Island Discs", is the conviction that we can take a few of
our CDs with us when we go. Now I feel robbed. I guess I would get
a tatty Dansette and a record of Batley Chamber Orchestra playing
minuets.
> Heaven doesn't need audio systems. Given that the Music of God is
> silent, the most sublime music is directly beamed into the
consciousness
> of the listener.
This silent music concept has fallen on stony ground here.
Especially as I was hoping I might get to play guitar properly if I
took the heaven option.
> Then there's purgatory... where you have to listen to poorly-made
> reissue CDs on "400w" multimedia speakers, turned to max. If you
lose it
> and throw the thing against the wall in a fit, you go to hell. If
it
> burns out before you do, you go to heaven.
One of the speakers has several intermittent faults, of course, from
where it fell off the table and landed on its stupid little jack
plugs and cracked the dry-soldered-in-China "400W" stereo amp
circuit board along the legs of its chip.
Fred, none of your places are much good :-(
Makes me even more glad to be alive. Thanks :-)
cheers, Ian
I think it should be the other way around.In purgatory,if you smash
the crappy 480W PMPO against the wall,GOT see's that you have good
taste and lets you in,Those who can stand to listen long enough for
the 12V 1A wallwart to burn out,..Well,GOT doesn't want to deal with
them,And they get stuck in Labtec hell forever!
MUAHAHHHAHAHAHAAAA....(Sorry.) ;) Nothing40.
--
Choky
Prodanovic Aleksandar
choky*remove*@eunet.yu
YU
-------------------------------
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"jim" <j...@macsys50.freeserve.co.uk> wrote in message
news:ak35gp$6jm$1...@news7.svr.pol.co.uk...
--
Choky
Prodanovic Aleksandar
choky*remove*@eunet.yu
YU
-------------------------------
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"Shiva" <help...@666.com> wrote in message
news:Vv499.373$yQ....@nwrddc04.gnilink.net...
All well and good, but... skinheads don't listen to rap...
-dim
Perhaps your skinheads are different. I think many of ours were
into ska and dub, paradoxical though it may seem. I'm not sure
exactly when rap came into the picture, but Nick isn't so far off
the mark. Perhaps it is a broad church.
On average, I am beginning to waver towards Hell. Next question is
how to get there.
cheers, Ian
> Ian Iveson wrote:
> > What kind of audio systems do they have in these places? Or perhaps
> > they just do live performances?
>
> Hell has the same audio systems we have here, just the program material
> is custom-tailored for the "client." Classical-lovers have to listen to
> scratchy records of Donny and Marie, Britney Spears, and BackStreet
> Boys. Country-lovers get Al Dimeola. Heavy Metal lovers get Vivaldi.
> Hard-rockers get Enya. And people who love all kinds of music get 101
> Strings.
Also professional musicians have to listen to high school bands
attempting to play their favorite classical tunes....
I also hear that Satan can't play the fiddle worth a damn.... As
in "The devil went down to Georgia".
> This reminds me of a Far Side cartoon. In the upper half,
> souls preparing to enter heaven were greeted with "Welcome
> to heaven, here's your harp". In the lower half it was
> "Welcome to hell, here's your accordion"
>
there was another one, where the Devil is saying to an orchestra conductor;
'Here you go, Maestro' as he walks into a room full of banjo
players...........
Crowns are in paradise, along with Crest and QSC, but at *high* volume,
surely? Over 3kW into 104dB/W/m speakers? I have borrowed an MCsquared
MC1250 (0.1% THD at 3.6kW) for my sound equipment exhibition (Norwich 26-30
Aug), which is a lot of fun. ;-)
Valves, valves, valves ...
Nick Sheldon
Norwich (twinned with Novisad)
Choky wrote in message ...
Could be worse. The Maestro could have been in a room full of
fiddle players instead of violin players. AFAIK fiddles and violins
are quite similar if not the same, but the music sounds a lot different.
> You trying to stir something up Ian ??
Just a little. I was amused to think that I might lead a life based
on my belief that god will have the best sound system. My son is
studying philosophy, and we were discussing the moral imperative.
For the rest of your endearingly cynical observations, it is for you
as for us all. I would quite like to discuss unity-coupled
phase-splitting transformers, but I'm too depressed.
I would suggest that you cheer up, but I can't think of a good
reason why you might. I have never seen the point saying that
things could be worse.
Bradford just did its presentation in its bid to become "Capital of
Culture". Thought that might put a smile on your face to match your
frame of mind.
cheers, Ian
Greg
You forgot me!!
Oh wait, I guess I would be the pilot. Hmm...
> As Jim starts to think "Wow, this
> wont be too bad after all!", the devil speaks: "Pamela, your punishment
> for a sinful life....." :-)
Ah, the twist on the old joke. I've heard it with ol' Bubba too.
Tim
Has a flight lesson in..11 hours (mmm, PA-28-140, so raw and powerful :^)
Oh- forgot to mention...
You mean Rossie/Rossanne?
Tim
--
Choky
Prodanovic Aleksandar
choky*remove*@eunet.yu
YU
-------------------------------
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-------------------------------
"Greg Pierce" <greg....@cox.net> wrote in message
news:3D670A29...@cox.net...
I'm thinking early SoundBlaster cards for Hell.
Plasmatronics flame throwers for Heaven.
/You/ go to hell.
Tim
Proud user of an AWE64 (for DOS compatibility)
Tim Williams wrote:
> "fred" <a...@xyz.com> wrote in message
> news:vlqgmu0q1qf6ovjod...@4ax.com...
>
>>I'm thinking early SoundBlaster cards for Hell.
>
>
> /You/ go to hell.
>
> Tim
> Proud user of an AWE64 (for DOS compatibility)
AWE64 doesn't count. Not nearly dirty enough. Has to be a gen-you-whine
SB16 to meet hell's standards.
Cheers,
Oh, ok.
Go to hell.
;-)
Tim (has a 486DX2-66)
(There's also an 8-bit card in this house somewhere)
Tim Williams wrote:
> "Fred Nachbaur" <fnac...@netscape.net> wrote in message
> news:3D68EDC4...@netscape.net...
>
>>AWE64 doesn't count. Not nearly dirty enough. Has to be a gen-you-whine
>>SB16 to meet hell's standards.
>
>
> Oh, ok.
>
> Go to hell.
>
> ;-)
>
> Tim (has a 486DX2-66)
Hey, I've got two of 'em! Er.. actually, one of them has been upgraded
to a P83. (Happened to luck into one of those Intel Pentium chips that
works in a 486 slot...)
> (There's also an 8-bit card in this house somewhere)
Well, ya got me there. :)
Hi Ian,
Just took a week off. As active devices we are capable of generating
waveforms. We can also pick up external signals, mix, amplify and distort
them. Such is life. If we were all resistors, life would be a pleasant
predictable straight line. The load resistance I work in to is far too high
and last week I hit a big negative peak. I may even have slipped into AB2.
Since my driver stage is not designed for such low loadings, I distort, and
become quite objectionable. My doctor also tells me I was born with an
unbypassed cathode resistor. I can do little about me anode load, but with
2000uF in each shoe, I now feel an awful lot better.
Culture ? Bradford is obviously following Stoke's lead. Having tired of
trying to promote the town as The National Centre of Industrial Dereliction,
the city fathers decided, two years ago, to turn part of the city centre
into a 'cultural quarter' and put up signs so we'd know where it was.
Stoke is not widely known for it's contributions to the arts, but does have
some pretty solid foundations to build on. We invented the first succesful
flush lavatory and Robbie Williams is a Stoke lad, as is Phil Taylor the
darts champion. Gary Glitter used to do his big Christmas show here, and
the captain of the Titanic, E.H. Smith, was a 'Stokey'
The area selected to become the 'cultural quarter' had three cinemas, two
theatres, a bingo hall, a kebab house, several traditional pubs, a chip
shop, and a large trough for the locals to vomit in. The hospital and
police station were handily placed to clear the streets at closing time.
Since becoming 'cultural' the cinemas have closed and we now only have one
theatre. We do have around twenty 'theme bars' though now, and about the
same number of balti/thai/indian/vietnamese/chinese/fast
food/takeways/mcdonalds/burger kings etc. A number of extra troughs have
thoughtfully been provided for visiting out of towners to vomit in, and
extended opening hours mean that you can now get a broken glass stuffed in
your face well into the early hours of the morning.
Bradford could well have something to learn from us
Those after 'culture' continue to drive the fifty odd miles either way to
Birmingham or Manchester as they always have.
Regards
jim
Hi Greg,
That Pamela's a bit too big for me. Hate to think what happens to all that
top end loading when age and gravity take over. Just took a weeks holiday.
On a bit of a downer the week before. Computer's at work so haven't kept up
with this thread. Aplogies if I upset anybody. Don't you just feel
sometimes when somebody asks about biasing his ST70 though, to reply --
try +40V
and work up from there till it's light enough to read by !!
Couldn't be that cruel, but RAT does sometimes go a bit dead.
regards
jim
Hi Fred,
Been away for a week, computer's at work so missed the rest of this thread
till now. On a bit of a downer the previous week. Think I slipped into AB2
= driver overload, and started making objectionable noises.
Slightly incorrect, mixing together your RA100 and Dogzilla, there's only
750V around Dogzilla. Your update made me look at Dogzilla again though.
Am I reading this right ?
6SN7s, surely the God of Drivers, but on a good day only capable of a gain
of about x16. A concertina to follow, and cathode followers to drive the
low
input imp/high input cap multiple OP valves. Three stages to produce a
gain of 16 x 0.9 x 0.9 = 12.95. Without NFB you need an AC input of 6V odd
to drive it. It's a lot of bits to get x12.95 gain, Fred.
I've got a very low KISS threshold, (Keep It SSimple) The less bits you put
in, particularly in the signal path, the less there is to influence the
result, and surely therefore we should look at a minimum number of high gain
stages. My current multiple pair 6L6GC, ( same Reflektors as you) is
currently driven by 6SN7 CFs direct coupled to a 6SL7 LTP sitting on a
6SJ7GT CCS (no particular reason, I just had 4 NOS labelled Tungsram, made
in USA)on a -100V line, which also provides fixed bias fot the OP valves.
This layout also gives me the LTP grids at 0V so I can direct couple the
signal source without a blocking cap.
The LTP loves looking at the high input imp direct coupled CFs, I've got
less than IK driver OP impedance and a gain of x24 to play with. from only
two stages. Add another gain stage before the LTP and I've got the same
number of stages as Dogzilla, but a gain of over 800. Why did you choose
such a low gain topography Fred ?
Even this lot makes me wonder. I keep alive the dream of two cascaded triode
stages
into a 1:1 CT driver transformer direct coupled to the OP valves with grid
bias up the secondary CT. Given no spare time, it will probably remain a
dream
regards as always
jim
jim wrote:
>>[...]
>
> Hi Fred,
> Been away for a week, computer's at work so missed the rest of this thread
> till now. On a bit of a downer the previous week. Think I slipped into AB2
> = driver overload, and started making objectionable noises.
> Slightly incorrect, mixing together your RA100 and Dogzilla, there's only
> 750V around Dogzilla.
Actually, I do have a 200v negative supply mainly for the CF's. It's
also used for the -150v gas-tube regulated bias reference
Your update made me look at Dogzilla again though.
> Am I reading this right ?
> 6SN7s, surely the God of Drivers, but on a good day only capable of a gain
> of about x16. A concertina to follow, and cathode followers to drive the
> low
> input imp/high input cap multiple OP valves. Three stages to produce a
> gain of 16 x 0.9 x 0.9 = 12.95. Without NFB you need an AC input of 6V odd
> to drive it. It's a lot of bits to get x12.95 gain, Fred.
> I've got a very low KISS threshold, (Keep It SSimple) The less bits you put
> in, particularly in the signal path, the less there is to influence the
> result, and surely therefore we should look at a minimum number of high gain
> stages. My current multiple pair 6L6GC, ( same Reflektors as you) is
> currently driven by 6SN7 CFs direct coupled to a 6SL7 LTP sitting on a
> 6SJ7GT CCS (no particular reason, I just had 4 NOS labelled Tungsram, made
> in USA)on a -100V line, which also provides fixed bias fot the OP valves.
> This layout also gives me the LTP grids at 0V so I can direct couple the
> signal source without a blocking cap.
> The LTP loves looking at the high input imp direct coupled CFs, I've got
> less than IK driver OP impedance and a gain of x24 to play with. from only
> two stages. Add another gain stage before the LTP and I've got the same
> number of stages as Dogzilla, but a gain of over 800. Why did you choose
> such a low gain topography Fred ?
Partly what I had on hand (plenty of 6SN7's, a severe paucity of
6SL7's), partly the "instrument amp" philosophy of "more stages =
better" because there are more opportunities for "euphonious distortion"
aka "tone".
Basically, with the present design I get down to a manageable drive
voltage (actually about 4 volts) using two bottles: one 6SN7 for the
CF's (needed to allow some AB2 operation), and one 6SN7 for the
concertina and preamp. The CF's need 50v peak for full output power, so
the concertina needs a bit more than that, let's say 60 to be safe;
divide by 15 (the approximate gain of the preamp) and we get 4v peak
(less than 3v RMS) at the preamp for full output. Not unreasonable,
methinks.
I did toy with the idea of using a pentode-driven LTP, but that would
have taken three bottles: the CF's, the LTP (e.g. 6SL7), and the pentode
CCS. The gain would have been somewhat higher, but I've got plenty of
gain available in earlier stages so it was a judgement call as to
whether to use that extra socket for a CCS, or for something else
(compressor, etc.)
I admittedly could have used a 6SL7 for the preamp/concertina, and
gotten more gain than the LTP approach -- with one less bottle.
> Even this lot makes me wonder. I keep alive the dream of two cascaded triode
> stages
> into a 1:1 CT driver transformer direct coupled to the OP valves with grid
> bias up the secondary CT. Given no spare time, it will probably remain a
> dream
> regards as always
> jim
Keep dreaming, jim! Not all dreams come true, but the better ones tend
to find their way to the surface. (Dogzilla has actually been a dream
for decades; it's getting really close to reality!)
Cheers,
Fred
jim wrote:
> "Greg Pierce" <greg....@cox.net> wrote in message
> news:3D670A29...@cox.net...
>
>>Ian, Choky, and Jim all arive in Hell at the same time (they were on the
>>same ill-fated airline flight). The devil leads them into a horrible,
>>dank, smelly dungeon, and opens a door. Behind the door is the ugliest,
>>nastiest woman you can imagine - she reeks of BO, has oozing pustules
>>everywhere (I mean EVERYWHERE), only a few buck teeth and bad breath.
>>The devil says "Ian, your punishment for your sinful life is to have sex
>>with this woman for eternity". He throws Ian in the room, locks the door
>>and throws away the key. He leads a now trembling Choky and Jim to the
>>next door. Behind it is an equally repulsive woman. "Choky", says the
>>devil, "Your punishment for a sinful life is to have sex with this woman
>>for eternity". He throws Choky to his doom, locks the door, and throws
>>away the key. Finally he leads Jim, who is now sweating profusely and
>>shaking so bad that he can barely walk, to another door.He swings the
>>door open to reveal Pamela Anderson. As Jim starts to think "Wow, this
>>wont be too bad after all!", the devil speaks: "Pamela, your punishment
>>for a sinful life....." :-)
>>
>>Greg
>>
>
>
> Hi Greg,
> That Pamela's a bit too big for me. Hate to think what happens to all that
> top end loading when age and gravity take over.
<snip>
Yeah, the sands of time definitely move downhill, thats for sure... :-)
--
Greg
"Where are we going, and why am I in this hand basket?"
I have a tendency to run in class C.
Bradford's attempt at a yuppie quarter is called Little Germany. It
celebrates the influence of German evangelical types who contributed
to the industrial revolution in some way I don't know about. I
guess batches of the same lot founded towns in the US. I have never
met an evangelical German in Bradford.
We have the National Museum of Film and Photography. There are no
Bradford photographers. And the Alhambra theatre, but Bradford
people don't go there.
We have a huge population of youth with parents from the Indian
sub-continent, with absolutely nothing to do. The current
government fashion is to encourage them to adopt aspects of "British
Culture". But it is clear from our presentation for our Capital of
Culture bid that no-one has the foggiest notion of what that might
mean. They don't know either so they drive round in Toyota
boom-boxes, sell drugs, and riot.
Consequently, in case you suspected that I am off topic, there are
no decent music shops or anywhere I can listen to decent systems.
And of course no valves.
We could do with some kind of Bob Marley of Bangra here.
cheers, Ian
"jim" <j...@macsys50.freeserve.co.uk> wrote in message
news:akneg5$5sq$1...@newsg2.svr.pol.co.uk...