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 Post subject: When a 6L6GC isn't enough...
PostPosted: Jan Fri 04, 2019 11:09 pm 
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Location: Boston, MA USA
If you want a bit more from your amplifier than 6L6GCs can provide, check this out:

https://www.cpii.com/docs/datasheets/75/8974.pdf

-David


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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Fri 04, 2019 11:53 pm 
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Location: Fernandina Beach, FL
But is it a drop-in replacement, pin for pin? :mrgreen:

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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Sat 05, 2019 1:28 am 
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So you'll need some minor adjustments to the circuit. Just add 125 amps at 21KV, 7000 watts of input drive. Can't get 2 megawatts without a LITTLE effort. And oh yeah, water cooling. Ordinary fire hoses should do it... no big deal!

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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Sat 05, 2019 3:51 am 
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You could blast your neighbors into the next county, I'm sure.

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I like things that light up, tubes, bulbs, LEDs, whatever, and things that make noise.


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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Sat 05, 2019 11:04 pm 
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Just what I've been looking for! 8)

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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Sun 06, 2019 4:21 am 
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16 volt fil at 600 amps...

steve

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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Sun 06, 2019 7:41 am 
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Location: Houston, TX
Underpowered for my new speaker design.












:wink:


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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Sun 06, 2019 3:06 pm 
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Looks great for a DIY push-pull class AB amp project, except for the price of the power and output transformers.
Or a single ended job, either would double as the heat source for the home and workshop.

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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Sun 06, 2019 6:31 pm 
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Vin Tageman wrote:
Underpowered for my new speaker design.


For that, you'll need this,
The legendary, yet rarely seen, Crown amplifier
http://www.repeater-builder.com/molotora/gontor/belchfire.pdf

"Must show proof of current CPR certification for purchase" :lol: :lol:


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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Sun 06, 2019 7:14 pm 
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Location: Houston, TX
enelson14 wrote:

Looking at the copyright date of that flyer reminds me of how much awesome audio technology has been lost.
But then, NASA managed to "lose" the Apollo tech, so.. :(


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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Sun 06, 2019 8:28 pm 
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Vin Tageman wrote:
enelson14 wrote:

Looking at the copyright date of that flyer reminds me of how much awesome audio technology has been lost.
But then, NASA managed to "lose" the Apollo tech, so.. :(



Yeah, I would have assumed it was steam-powered (the original push-pull design!) They were way ahead of the curve, what with that new-fangled "electricity"


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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Mon 07, 2019 2:39 am 
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If people need that kind of power, I think Eimac will be around for very many years making tubes. But they don't call them tubes anymore on their site. They got some odd euphemism for vacuum tubes that sounds modern and techy.

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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Mon 07, 2019 2:36 pm 
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This one needs to be steam cooled. Plain water is just so last year

Just wait till the audiophiloles find out

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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Tue 08, 2019 3:45 am 
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Vin Tageman wrote:
enelson14 wrote:
... But then, NASA managed to "lose" the Apollo tech, so.. :(

This is a commonly raised misunderstanding of what is meant by "lost." It isn't as if they 'misplaced' the assembly instructions.

The Saturn V alone was made from over 3 millions parts, each of which were custom made, so you can't just go down to your local parts supplier and order up a set of spares. And the 'know how' for making those parts was 'lost' when the Apollo program was canceled, leaving the 'brain power' (and man power) to be spread out to lord know where in industry (not to mention, by now, many are dead). For example, where are you going to find people who know how to wire the microscopic cores for the onboard flight computer, much less anyone who knows how to program it?

The whole thing would need to be 'recreated' using modern technology but, besides being a monumental task, that creates an entirely new set of problems. For example, modern electronics, being miniaturized solid state, are more susceptible to the radiation in space so you can't just plop in an off-the-shelf microprocessor and be good to go. And, in principle, the same thing applies to all 3 million parts.


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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Tue 08, 2019 4:14 am 
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Location: Houston, TX
uhh.. yeah.. I've read the lit on it, too.
Your sarcasm detector needs some work. Since most of the posts in this thread have been tongue-in-cheek, that, too, was meant as a joke, hence the quotes around "lose".
I was having some fun poking at NASA in general (good a time as any) while also taking a jab at the conspiracy theorists. I just didn't bother following with a smiiey (sad face emoji, but no smiley), so two here should make up for it: :mrgreen: :wink:


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 Post subject: Re: When a 6L6GC isn't enough...
PostPosted: Jan Tue 08, 2019 6:20 am 
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Vin Tageman wrote:
uhh.. yeah.. I've read the lit on it, too.
Your sarcasm detector needs some work. Since most of the posts in this thread have been tongue-in-cheek, that, too, was meant as a joke, hence the quotes around "lose".
I was having some fun poking at NASA in general (good a time as any) while also taking a jab at the conspiracy theorists. I just didn't bother following with a smiiey (sad face emoji, but no smiley), so two here should make up for it: :mrgreen: :wink:
My apologies. I do have trouble discerning 'sarcasm' from 'serious' when they use the same words in making the same observation. But I'll work on it. :wink:


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