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Crack;Bottlehead OTL - Page 168

post #2506 of 5996
A worthy addition to the Crack tube rolling record. Thanks for taking the time to share your experience.
post #2507 of 5996
Quote:
Originally Posted by DefQon View Post

Those first two tubes are by Sylvania. I had 50 of them. Still have 2 Baldwin ones that are bit different as they are made in the same factory as the British Mullards, flashes on powerup is a dead giveaway for a British dual triode tube.

Interesting to know. Could be a good opportunity to get the Mullard sound at a fraction of the price. Do they have etch codes that give away heir origins? Other European ECC82s also have the same flash at start up.
Edited by W0lfd0g - 8/27/13 at 5:40am
post #2508 of 5996
Those with the Speedball, would you recommend 12AU7/ECC82 equivs or 12BH7/ECC80 equivs?
post #2509 of 5996
Quote:
Originally Posted by Loquah View Post

Those with the Speedball, would you recommend 12AU7/ECC82 equivs or 12BH7/ECC80 equivs?

It depends on your preference.  I love the 12AU7 RCA Cleartop with the 5998 but much-prefer the 12BH7 with the RCA 6as7g. 

 

To summarize, get both!  wink_face.gif

post #2510 of 5996

was trying to hold off buying tubes but one of the supplied tubes is microphonic, or at least i think it is.  I was under the impression that touching the tube would cause some noise but there was none.  Without music playing, I hear a buzzing in the right channel that comes and goes.  tried two headphones, same thing, only on the right.  Any ideas?

post #2511 of 5996
Quote:
Originally Posted by caracara08 View Post

was trying to hold off buying tubes but one of the supplied tubes is microphonic, or at least i think it is.  I was under the impression that touching the tube would cause some noise but there was none.  Without music playing, I hear a buzzing in the right channel that comes and goes.  tried two headphones, same thing, only on the right.  Any ideas?
Try leaving it on for a few hours. I had some NOS tubes that buzzed on first plug in. Went away after a day burning in.
post #2512 of 5996
Quote:
Originally Posted by caracara08 View Post

was trying to hold off buying tubes but one of the supplied tubes is microphonic, or at least i think it is.  I was under the impression that touching the tube would cause some noise but there was none.  Without music playing, I hear a buzzing in the right channel that comes and goes.  tried two headphones, same thing, only on the right.  Any ideas?

 

If the problem persists after a couple days, you can also try using Deoxit to clean the leads. 

 
post #2513 of 5996

thanks guys. will do.  i hope it just needs some Deoxit and/or burn in time.

post #2514 of 5996
Quote:
Originally Posted by DefQon View Post

I'm actually interested in what Doc's setup is at home...

This may sound strange, but home is where I go to get away from audio. My setup at home is a 1956 Telefunken Salzburg console with the stereo upgrade amp, tonearm and speakers. Basically it gets turned on to FM on Saturday and Sunday night to listen to the local blues show. I also have a room dedicated to a front projection home theater with a 96" screen, that is slowly getting a full Blumenstein Audio surround speaker setup powered by our amps. I get my morning dose of home listening when I run 3 miles, via Pandora on an iphone with UE Triple Fi 10s.

 

If you mean what do I run in a Crack amp, I usually put in a 5998 that a friend gave me a few years back (when they were going for $15!), and a Mullard 8136. But lately I have been using a Mainline for headphone listening. The Mainline sits here in the office for computer listening, currently with some Anax mod HD800s and a custom balanced cable. Bear in mind that we have a dedicated room for the big system here at Bottleheadquarters, and that is the primary system used for critical listening. That system is the following:

 

Mac Mini music server running Amarra into a prototype Bottlehead DAC

Analog Engineering modded Empire 208 with SME 309 and Haniwa HCTR01 cart, into a prototype all tube active step up preamp and Eros phono stage

Nagra T Audio 1/4" tape machine with Bottlehead Tube Repro

Studer A80 1" 2 track tape machine with Bottlehead Tube Repro

Bottlehead BeePre 300B preamp

Custom Bottlehead all tube three way crossover

Seven Bottlehead Paramount amps per channel - one on Raal ribbon Tweeter, four in series on ATD Hypergraph 5" midrange, two driving an array of four 6.5" Exodus woofers. Drivers are in individual ported cabinets with heavy felt diffraction treatment, time aligned. Room has been treated.

post #2515 of 5996

Note to self: need to visit Bottlehead HQ and listen to witness/listen to audio room they have setup eek.gif
 

post #2516 of 5996

Everyone is most welcome to stop by for a listen. That's part of why we moved Bottleheadquarters a few years ago, to have a comfortable place for equipment auditions.

post #2517 of 5996

I like understanding how things work, especially things I plan on building.  While I've been (happily) waiting on the Crack to ship, I've put together some videos that others may find useful as well.  They are mostly beginner videos.

 

If you guys have any videos that you'd like to add to this, then please let me know and I'll try to edit this post.

 

Also, are there any good online videos that explain how the Crack or Speedball works?

How to use a Multimeter for beginners: Part 1 - Voltage measurement / Multimeter tutorial - YouTube (also describes what voltage is)

post #2518 of 5996
Quote:
Originally Posted by whatthedac View Post

I like understanding how things work, especially things I plan on building.  While I've been (happily) waiting on the Crack to ship, I've put together some videos that others may find useful as well.  They are mostly beginner videos.

 

If you guys have any videos that you'd like to add to this, then please let me know and I'll try to edit this post.

 

Also, are there any good online videos that explain how the Crack or Speedball works?

How to use a Multimeter for beginners: Part 1 - Voltage measurement / Multimeter tutorial - YouTube (also describes what voltage is)

 

Great links, thanks. I'm really interested to watch the Learning Series videos as I've built and love my Crack (SEX on the way as of today o2smile.gif), but have never taken the time to understand the wonders of how tubes work.

 

On a different note, after my post last night about the various input tubes I have, I reverted from the Mullard ECC82 back to the RCA Cleartop this morning and I'm hearing the details that the Mullard couldn't grab. Listening to "Jane" by Ben Folds Five I could actually hear the textures of the interplay between the piano strings which is pretty magic (note: it's an old-sounding piano in the recording and has some variance between the tuning of the strings on each single note - not something you should hear from a new, well-tuned piano)

post #2519 of 5996
Quote:
Originally Posted by W0lfd0g View Post


Interesting to know. Could be a good opportunity to get the Mullard sound at a fraction of the price. Do they have etch codes that give away heir origins? Other European ECC82s also have the same flash at start up.

No etch codes that I know of. I found it odd that my Baldwin's flashes a bit on start-up as they don't have the 4 pinched groves that British tubes such as Amperex and Mullard equivalents have and most other experienced users on AK forums have Sylvania or RCA based Baldwins, so my ones are a bit of a odd duck. Yes European made British based re-badge/equivalents do flash on startup. Holland plant Amperex and Mullard and few others that I can't think off the top of my head are also ones that flash on startup.

post #2520 of 5996
Quote:
Originally Posted by DefQon View Post

No etch codes that I know of. I found it odd that my Baldwin's flashes a bit on start-up as they don't have the 4 pinched groves that British tubes such as Amperex and Mullard equivalents have and most other experienced users on AK forums have Sylvania or RCA based Baldwins, so my ones are a bit of a odd duck. Yes European made British based re-badge/equivalents do flash on startup. Holland plant Amperex and Mullard and few others that I can't think off the top of my head are also ones that flash on startup.

OK, I need to find one of these. i dont care what they sound like, I just want a tube that flashes!
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