Leaderboard

Sent from my iPhone using Tapatalk

Brioche French toast stuffed with sweet marscapone and banana caramel nut, sausages, and bottomless mimosas.

Yep, we were in the front pew. Really nice show, first half acoustic and second half electric with a lot of sampling and pedaling. The highlight was In My Life by The Beatles that grew out of a cacophonous distortion jam. It was so sparkling and huge and layered -- between electronics and the amazing sacred space -- and the harmonics were kind of mind-blowing. His encore was a great Western tubes and theme songs, including Happy Trails and the Bonanza theme. Fun stuff.

Waiting for Bill Frissell solo at Grace Cathedral

Even I wouldn't say that.

Lily and Andrew say, "Done!"

Until the chili cheese kicks in, then it's on to W.C.

I looked at that thread - they have some good info on filament supplies, but I think the curve shown in post #27 is wrong. I base this on an article "Extending Tube Life" by Charles King in Glass Audio Vol1, No.2, 1989. He referenced an earlier article from Audio Dimensions, a tube audio company that was around in the 80s. They showed the same graph that is in post #27 (which is also in Tremaine's Audio Cyclopedia), but then they report data from a study done by GE. GE doesn't have a very good reputation in high end audio, but back in the 50s and 60s it was the 2nd or 3rd largest manufacturer of vacuum tubes in the US. Remember that the biggest consumer tube market back in the 50s and early 60s was the home TV market, so there was a definite interest in improving tube reliability since consumers would get upset if their TVs broke down - none of the modern high end "well our equipment is like a Ferrari, it's state of the art designed at the ragged edge so you have to expect problems" crap. According to the GE study, increasing the filament voltage to 7.5 volts (or a 5670 tube with nominal 6.43 volt filaments, significantly decreased tube life, but decreasing filament voltage to 5.04 volts (80% of nominal) both increased tube life and decreased variation in transconductance over a 5000 hour test period, compared to running the tube at its nominal filament voltage. Although this was done specifically with a 5670 tube, but the results were thought to be generalizable. This contradicts the plot of tube life vs. heater voltage in post 27. However there is more data to support the GE study. Eimac, a manufacturer of RF power tubes, published a report on prolonging tube life which recommended that tubes be run at nominal voltage for a couple hundred hours to burn them in, then gradually lower the filament voltage until emission dropped by 2%, and then turn the voltage back up until the emission was within 1% the original. Of course this requires a RF transmitter with adjustable filament voltages, but the final voltage for long term use was a few percent below nominal for best tube life (I found this article with a Google search for filament voltage and tube life). David Berning's equipment, which uses 12AX7, 12AT7 and 6SN7 tubes in preamps and amps, also uses lower filament voltages (typically 5.7V for 6.3V tubes) and he routinely claims 10,000 to 20,000 hour tube life - his company has been around since the early 1980s, and I've not seen or heard anything to indicate that his equipment needs tube replacements more frequently than his claims would suggest. Note that these are the same tube types used in the SRX Plus so the results should be directly applicable. I think, therefore, that there is good evidence that dropping the filament voltage by 5-10% will improve tube reliability and service life. It may be that the curve shown in post #27 and the Audio Cyclopedia are correct if you are running a tube at or near its maximum, but good design for reliability and tube life dictates that tubes should be run significantly below the maximum.

Done here, too. Go, Karen!

The Good Son went to his mom's today to help with computer issues. 4 hours later she has a clean and up-to-date machine.....

As does some other guy not named Lily and Andrew. Go Wonder Woman!

Katie's this morning. Didn't really take pictures after sunrise as I was chatting with some Audi peoples.

2 in Love - David Benoit featuring Jane Monheit

For how long?

Yep. Heading to D.C. Sent from my iPhone using Tapatalk

Cardiologist (billing) approved!

I ran a 3.1 system with my old denon (same as marantz pretty much) receiver for years, I don't think you should have any problem running a 3.0 system. Come to think I definitely turned off my sub one night and ran my bookshelves full range just to see how they would sound, so that was a 3.0 system and it worked fine. Borrowing reks' audyssey mic is a good idea, it will do all the work for you. It should set the speakers to large automatically, if it doesn't you can change it. EDIT: or you could just set your speaker distances (or just leave them at zero) then adjust the volume on the center channel until you're happy, and set the speakers to large, and you should be good to go. audyssey is cool though. If you don't like the effect audyssey eq has on your sound you can turn it off, but it will still retain volume/speaker distance etc, meaning the stuff you want. batpig's denon to english dictionary is a great source of info if you want to learn more: http://batpigworld.com/wp/?page_id=55

I saw this when looking around: http://www.audiokarma.org/forums/showpost.php?p=7640562&postcount=19 I'm not sure exactly how to do it, as I can't pull up the PDF at work, but I'm sure we'll be able to figure out how to just cut off sub and surrounds. Having fronts as large shouldn't be an issue, and like this says, having the center as small would have the dialogue and up through that, but the receiver should send the lows to the fronts to handle. It may not be a one-click setting, but I'm sure setting it up once shouldn't be too terribly difficult. **BRENT**

My first meme

**BRENT**

Okay you asked for it. Here's a little from Saturday and Sunday. We're a pretty gimpy group, so didn't stray far. For the hell of it shot everything 21:9 (with the Sigma dp2 quattro). Compressed, though still a bit large on the bandwidth front. My apologies.

A few from this morning's C&C.

I believe they are called split rivets. Finally installed this despite it still having some PSU issues. It faces an up hill battle against the Carbon that used to sit there.

While on the way from Carson City to Virginia City I spotted something that caught my interest So we pulled over to investigate further And were not not disappointed Turns out it was something that's been going on for 44 years https://www.virginiacityhillclimb.com/?page_id=2 So we carried on, and saw it from the other end

All in one Absolute Sound email. The push is on! I propose an MQA sub-haiku contest ... BOOBS. TOO PERT. BUT REAL.