Leaderboard

One day last year, while planning my Carbon build, I thought it would be neat to have a dynamic headphone amplifier in a matching case. The Dynahi suggested itself, though I wanted something a little less overkill. Then it occured to me that I might be able to stuff a Dynahi and a Dynalo into one case, and so make an amplifier capable of driving any headphone. So I made this, which I called the DDCA (Dynalo-Dynahi Combination Amplifier): one set of inputs feeding two amps, with separate output protection circuits, separate volume pots, three GRLV power supplies, and one transformer. It was a 3D puzzle to fit everything in (if I were to make another one, I'd position the Dynahi boards right-side up, turned out there is enough clearance that way and it would have simplified assembly) and the wiring took forever (plus keeping it perfectly tidy is beyond my skill). I lowered the gain on both the Dynalo and the Dynahi, since on most amps, I have the volume at 10 o'clock or less, and I wanted to use more of the volume control. Have to admit: the RK50 on the Carbon spoiled me, and the TKD 601 pots here don't live up to it. Not bad, though. Like I posted a couple of days ago, I couldn't bias the Dynahi section as high as I wanted, but even at 0.40V across the 20ohm output device resistors it runs fairly warm, so I decided to leave it alone for now. I also need to get the top anodized black. Maybe add some speaker binding posts... wonder how much of a speaker load I can drive from the Dynahi? Both sections sound great to me, though I don't have an HE-6 or K1000 to really put the Dynahi through its paces. As usual — many thanks to @kevin gilmore and @spritzer for all the designs and boards. This wouldn't exist without you guys. Thanks to @vilts for making matching titanium knobs, thanks to @Zashoomin for getting extra sand with me so we could make matched sets, and thanks to everyone here for group buys and all the help and support.

Did some work on mocking up the chassis and getting into a more listenable state. I will need to get aluminum top/bottom and rear panels for this (not using the steel ones that it came with). I'm also still a bit concerned with how warm the buffer transistors run, and this is open air. Using a modified amb e12 protector board (with muting). I tested this to see if HF oscillation would trip it, and it did (12V ~70MHz with the feedback set to the mid FB point). Listening-wise, it is likely my favorite amp, even being single-ended. This thing has balls, and seems to open up the recording more than any other amp I have built or used. Since my SE DynaHi boards are a drop-in, I may take another listen to those as well, but from memory, the FET version stomps it. I am going to build up a GRLV for this, and will likely get a 50 or 100VA Antek trafo for it instead of the 120 or 160VA SumR I have in here (a bit in the HC overdo it fashion ).

Actually, should have gotten to oxygen. What we were investigating was the assembly of elements within stars, which was an active area of investigation back then at Caltech, which had a very strong astrophysics section - Willy Fowler was there and he won a Nobel prize in physics some years after I left. Helium is two protons and two neutrons. In theory the next step would be to fuse two He nuclei together to make beryllium, but Be8 is unstable (the stable atom is Be9 - 4 protons and 5 neutrons). So Fred Hoyle proposed that 3 He atoms would make C12, but in order for that to happen, there had to be a resonance in the cross-section just above the ground state that would allow that to happen with sufficient frequency to form C12 to any extent, and in fact, that was found. My experiment was designed to look at the next step, which is C12 + He going to O16, so I had a very pure C12 target and relatively low energy alpha particles bombarding it, and measuring the cross-section to see if there was a low energy nuclear resonance that would allow that next step to occur. The resonance itself was too low in energy to measure directly but the idea was to measure the tail of the resonance which should have resulted in a higher cross-section than expected without it. Actually I am surprised that I remember much about it considering how long ago that was. Also, somewhat off topic.

Just made an offer and it was accepted for this beast. 2013 BMW K1600 GTL Rode for a couple of hours Saturday. Unbelievable. 6th gear at 10mph, hit the throttle and instant acceleration. You would think big and clumsy. Nope. Very flickable. Just as important, my favorite rider (Karyl) approves

How dare we let little things like health, safety, and the environment get in the way of Toshiba's profits.

.... and you ended up with CO2 right.......? I used one to make a negative ion generator. There were about 5 of us working in a closed room with only 2 doors, no windows with a bunch of printers being repaired and tested. By mid afternoon most of us were getting very drowsy. I built a negative ion generator and installed in a cardboard box and placed it on a cupboard, and it really did wonders. One day an engineer came in and asked what was in the box with the 5 needles sticking out. The boys told him what it was and dobbed me in as the builder. I was then called up to explain the deal. When I finished, the engineer told me it was all a lot of rubbish. After everyone assured him it wasn't, he asked how I knew it was pumping out negative ions, and not positive ones. I explained that it was dependent upon the direction of the diodes. He demanded to know how much voltage it was pumping out and how we could test it. I produced an Anderson static tester and gave it to him. He pointed it at the generator and it read 4KV positive and gave me a very surly look. I pointed out to him that you need to calibrate the tester first and then take a reading. When I showed him how it was done, he took another reading, which read just over 6KV.negative as specified. He then got all huffy and told us to go out and get a commercial one. We all ignored the demand and went back to work. As a back note to his, A few years later I had reason to go to a Sagem factory (French exocet missile producer) to look at their premises where they were assembling and testing telex machines. They had this long bench about 50 metres long with finished machines running under test. I noticed that they had 3 negative ion generators fixed to the ceiling. I asked the manager what he thought of them, and he said that it was the best things they did to the place.

RIP Charlie Murphy...a comedy genius: http://www.rollingstone.com/tv/news/charlie-murphy-comedian-and-chappelles-show-star-dead-at-57-w476365

Over regulation preventing any new power plants from coming online.

"That's not how this works. That's not how any of this works." "never here" Spirit Falls, WA. Maintenon Acqueduct, Eure-et-Loire, France. Aleutian Islands, Alaska. Dragon Blood Tree, Socotra, Yemen. Zion National Park. Life in Death Valley, CA. Abraham Lake, AB. ‘Knife Angel’ sculpture is made out of 100,000 knives collected by the police. A backroads highway in Arkansas. Mt Bachelor during a New Moon - Oregon. The Cascades on Little Stony Creek - Pembroke, VA. Deception Pass. Batts Rock, Barbados. Kauai, HI. The Painted Hills of central Oregon. Palawan coastline, Philippines. Mackenzie River, Norman Wells, NWT The Isle of Skye, Scotland. Beach in Iceland during March. The Breithorn and Klein Matterhorn illuminated by the full moon - view from Randa, Switzerland. Starry backyard in Arkansas. Lake McDonald, Glacier National Park, Montana. Nightfall at the Matterhorn - Zermatt, Switzerland. Monument Valley in the distance. Big Cottonwood Canyon, UT. Alaska. Lynn Creek, North Vancouver, BC. Catawba, VA. Mount Rundle at 3AM from Vermillion Lakes. The Great Sand Dunes. Alamosa, Colorado. Svartifoss - Skaftafell National Park, Iceland. Wind Cave National Park, South Dakota. Just Before Sunrise at Playa Jibacoa, Cuba. Mount Olympus, Salt Lake City, UT. Sunset in Jasper national park. Alps, France. French coastline. Parksville, Vancouver Island. Northern Lights form a hike I took in Kvam Norway. Night to Day- Milky Way and Sunrise over Canyonlands National Park, UT. Over the coast at Cape Kiwanda, OR. Petzen, Austria. Escalante National Monument. San Clemente Pier. Church of the Good Shepherd. Mount LeConte, The Great Smoky Mountains National Park. Click for slightly wider.

No, no ebay for me and you're free to buy whereever you want. i'm not offended at all if i didn't want people to make them, I wouldn't have released it under CC-by-SA license. Open source is just something I appreciate and promote and I much prefer people who respect it . that's it

Gotta love the culture-wars!

The potentially good news is that the electronics division/brand/stuff will no doubt be spun off in a reorganization (if they can get away with it) or more likely sold to another large tech company prior to dragging those assets into an all out bankruptcy. More cash flow for their shareholders that way, as opposed to a slow, piecemeal and court controlled asset sell off. So hopefully that will mean better products and lower prices to the end consumer of whatever company can pick up their assets and technology on the cheap.

1 board for me too. The pcb buying/ group buys here are starting to feel more like subscriptions... Whats in the "set"?

the real question is what was toshiba thinking when they bought that division?

My blood runs cold... RIP Mr. Geils.

Marine Corps Band out of New Orleans. Great fucking show. Went with the kids and a friend of mine. Out to dinner afterwards. Great bloody night. Now to go pass out. This was taken during The Imperial March **BRENT**

Dang....that makes me feel old. RIP, J. You made my dreams better with that video... HS

That bowling ball. It's my wife!! RIP J. Geils.

Two households, both alike in dignity, In fair Verona, where we lay our scene, From ancient grudge break to new mutiny, Where civil blood makes civil hands unclean.

I remember seeing/using one of those as a physics grad student using an accelerator for alpha particles (He nuclei) looking for a low energy resonance in C12 to O16.

Track bag is packed and ready to go. Sent from my SAMSUNG-SM-G890A using Tapatalk

Damn, he was rapid fire.

Sent from my iPhone using Tapatalk

Thanks Soren for the boards! Something fun and exciting in the future

Andy Jenkinson is the younger brother of Tom Jenkinson, AKA Squarepusher. Andy makes acid techno as Ceephax Acid Crew. This is his cat.

Earlier today, pho with double-meat:

I can get them cheaply. Let me know if you need. They are something like these: