It's no threat to earth though Just ear drums far and wide. I thought I'd announce the birth of my new baby, a brand new Asteroid 60.
I also thought you'd all like to know that the Layout I drew from shared information is a good one. At start up I thought I had done something wrong until I realized my bias was still max negative (how I start up every amp). The amp had no power and scratchy output until I started dialing down the bias voltage and then holy cow! Pretty darn loud. And then I realized I was set on the soft setting for the preamp gain toggle. Switched it to hard and the building started rattling. man is this thing loud. I will properly bias her for tone tomorrow morning.
I just want to thank Allyn for all of his help on this project. Without him it wouldn't have been possible for me or anyone else who now has a proper layout to work with.
Awesome!!! I just finished a Concorde built and am burning it in as we speak!!! Damn these things rock. post some pics Barry. If I can find my camera (wife and daughter) i'll take some tonight and post.
Nothing to be ashamed of there Ben. (edit, wrong Ben) That amp is beaustiful mister.
Dan
The Last of the World's Great Human Beings
Seek immediate medical attention if you suddenly go either deaf or blind.
If you put the Federal Government in charge of the Sahara Desert, in five years time there would be a shortage of sand.
Barry, are you sure It looks like a sweet little work of art, but she might trigger a tectonic upheaval You already admitted that the building shook It's great to see the clean, organized layouts you and Allyn and the others put together Can't wait to hear her
Well, it's been a long morning. Turns out I had a 4700 ohm resistor in place of the required 470 ohm one on the PI's cathodes. I'm still not good with those 5 band resistors yet. Swapped it out and then the squeal of the new 787 dreamliner rattled the shop (sorry, Boeing is paying everyone to hype there new air log) and I had to swap the OT primary leads since they were out of polarity.
That done, and I find out I just thought it was loud the first time. Sheesh! My lovely bride was running for cover. This amp is a beast for sure. I also found out that my 4 sets of matched set EL34's may be matched at 400 volts on the Tube Store's maximatcher ( I even checked them with my maximatcher and they were dead on) but when you subject them to 500 volts, all bets are off. Out of 8 tubes all pulling 32ma at 400 volts, I ended up with the following at 500:
10,18,18,24,29,33,38 and 49 milliamps
Isn't it lucky I got one match at 18ma? I guess that's the last time I pay an extra $0.75 per tube for matching. I'll spend the extra money on more tubes instead and match them in the amps I build. I popped the matched set in and biased them up to 40ma 484 volts with zero signal and put the amp through its paces.
Boy is there a big difference between the hard and soft setting on the preamp gain switch. On soft, you get alot more clean head room and the amp is very sweet up until high volume settings. On hard, you get a raging animal with lots of dirty distortion early on plus huge output power, feedback and sustain. It's like having two amps in one. As far as tone is concerned, there is lots of bottom end and the controls will let you dial just about any thing from biting edgy lead down to heavy bottom rhythm.
The presence control doesn't do much that I can hear and the cut control is probably good for that muddy metal tone. The amp is very versatile indeed.
I don't know where I am going to play this monster as is, so I'm definitely going to have to build an airbrake to go with it. Wow! Now I know why these things cost more than I can afford.
Txbuesboy,
the trannies are model accurate for the asteroid circuit, and are not express units. If you want the info I can PM it to you.
Everyone else,
thanks for the kind words. I'll post pics of the finished product when the cab is done.
Just ear drums far and wide. I thought I'd announce the birth of my new baby, a brand new Asteroid 60. 
You already admitted that the building shook 