kevin gilmore

Great stuff. Absolutely true.

Filburt and everyone else is absolutely correct. The only reason that the gain of 11 option is available is that it is a copyover from the hornet design. That high gain is designed for sources that have an output voltage of only 100mv or so. This is clearly stupid as the internal dac has an output of way more than that. Given the 4.0 volts (absolutely fully charged and even overcharged a bit) and a rail to rail opamp that looses .4 volts, the absolute maximum output voltage is going to be 3.6 VAC Peak to Peak.

N9EDA for more than 30 years.

pbs does a show every year for the top 5 nutcases. this is not even the wannabe's http://www.planetchristmas.com/ShowingOff2002.htm

I think the record is that one guy in iowa with 500,000 watts (gets bigger each year) At the chicago pricing of .11 per killowatt hour, that is about $55 per hour, 4 or so hours a night for about 45 days is about $10k.

No Bugs Bunny?

Billy get those things outside where they belong. Get a couple hundred more to go with them. THINK CHRISTMAS DISPLAY!!!!! You know you want to... Got to compete with all those whack jobs that end up on tv showing off hundreds of thousands of watts... Shape of a giant headphone.... You will get on tv for sure.

Billy has on a number of ocassions proven to me that he is in fact mature in some situations. Especially when it comes to running his two businesses. Usually when I have met someone that is immature, they are so in every facet of their life. So there still has to be some other explanation. Anyone want to speculate??

It was a joke OK. In another thread tyrion says there is always some truth in every joke. If i've offended anyone that is actually bipolar, it was completely accidental. My sisters ex was diagnosed with a very severe case of tourettes. So i know what that is really like, and looking back on it, it completely makes sense. A former friend of mine i now think has the same thing, plus being a manic depressive. Seriously though, it might actually explain some of billy's actions. If you have seen billy in action you know what i'm talking about. There has to be a rational explanation... There are a number of people I work with that are definitely bipolar, and admit to such. No billy, I'm not picking on you. I just want you to get the help you need

Actually I think he is. That or tourette's syndrome. Or both. Certainly would explain a lot of billy's behaviour.... Being bipolar isn't really a bad thing. Except when as a tenured professor in colorado, you give away hand made explosives in class for halloween... (and get arrested in the process)

Leave my good friend billy alone He's bipolar don't you know Similar to "Mas e Minos" (ok, lets see if anyone knows that cartoon reference)

Enough coffee now Meta42 for $875... NOPE. Worse than that, much worse than that http://headwize.com/projects/showfile.php?file=opamp_prj.htm figure 11c. with much smaller transistors, otherwise identical. (+/-15 volt power supplies) CMOY FOR $375 NOPE. That is the meta42 except with buf634's instead of the el2001...(SR71 with +/- 9 volt supplies) or just an opamp (hornet) with a rail splitter (single 9 volt supply) or just an opamp (tomahawk) with +/-1.5 volt power supplies or just an opamp (predator) with a rail splitter (single 4 volt supply)

That is just the tapedeck and robot. Lot more to it than just that piece.

And eat up 1000 sq feet, and consume HOW MUCH POWER. OK, that is not quite fair, an EMC box will do it in 4 rack panels. One on line raid'd and mirrored set, One off line set that runs the backup on 5 or more 600gb dlt drive in parallel. Then it would only take about 6 hours. Plus robots and stacks of tapes. Price is still nasty. Want something that sits on a desk, makes no noise, and can do at least 200 GB /hour. Without changing tapes!

I'm feeling fine billy. Still happy from massive hunk of moo from mortons on saturday. Combined with huge shrimp alexander. Been working on a failed drive in a 3T raid set since friday. Started friday morning and just finished about 15 minutes ago. Sure would like to find a way to back that thing up in less than 1 week. (removable media) At least the hr-2 is built well with none of rays famous major errors. 1) It can't cook eggs on the top panel. 2) No noise from the switchers because there aren't any. 3) No mother fucking huge caps that do absolutely nothing. On the other hand 1) not only is is not pure class A, it can dip into real class B due to layout error with temperature compensation diodes. (fixed in apache) Ok, go and look the rest up. I need coffee! There billy, you happy now...

What is to discuss. An opamp, and 2 transistors. Exact circuit published on headwize 2 years before ray built the piece of shit. I have discussed this plenty, do a search. And the Apache, you guessed it is 2 x hr2 in one box. Virtually identical to the circuitry in the headroom products circa 2000 or so. Nowhere near the beef necessary to truely drive low impedance headphones. Oodles and Gobs of feedback. Yuuch.

This is ray we are talking about here.... His stupidity is only matched by is arrogance... With a 12au7 the output impedance of the preamp section would be about 18k. With a 12ax7 it would be closer to 25k. Output impedance of the conrad johnson art preamp (act2) is specified as <500 ohms ct5 and ct6 are 800 ohms Ray's B52 is something in the range of 1500 to 1800 ohms.

well if the power amp has enough gain, and/or the source has a high enough output, then fine. that particular design is going to want to see a low impedance on the headphone output. So if you load it with say 150 ohms, it would be a lot better than running the thing with a wide open impedance. And if your amp is solid state, one mistake volume wise and the front end of said amplifier is going to turn to dust.

tell that to people that made the mistake of buying a stealth...

Don't have the pictures handy to see where the xlr preamp outputs are actually wired to. 1) if they are wired to the cathodes of the first tube, then its a simple cathode follower, however NO GAIN. As the pot is the first thing in the circuit followed by the cathode follower. 3) The only other place would be the same as the headphone output jack. Definitely not a really great place for a preamp output...

You may have a point there. aerius mode on... But you only need 2 wongs to make a wong junior...

No billy, you are wrong, wrong, just plain wrong. The stealth was even worse. On the stealth the front end gain tube was also used as an ultra high impedance preamp output. In other words it sucked bigtime. Could not even drive 3 feet of cable. So ray learned from his serious mistakes, and on the B52 added a simple cathode follower. A simple cathode follower does not a preamp make. Better yes, but still massively sucky. Anyone with brains should look at schematics of the audio research preamps, and the conrad johnson preamps to see it done right. Schematics of both available on the web. Hell ray still can't do an analog 12 volt fillament supply... Which is why he is using those $20 ultracrap ultranoisy switchers. Both on the Craptor and the B52. Can't wait to see what ray is going to use as the battery charger for the lithium battery in the predator. We should rename the predator, "the target of oportunity"

Of course it does. raptor not useful for anything <= 150 ohms

Well with your headphones this is clearly true. And of course a B52 is a (raptor) + (raptor) which means it (sucks)*(sucks) or in terms of money $1300+$1300 << $5300 A simple modification will allow the raptor to sound much better, but only with high impedance headphones (==300 ohms) There, I feel better now. A day without trashing my good friend ray is like a day without sunshine.

I just can't think of appropriate words that would allow me to respond to this. I'm just speechless...