Added some old amp and speakers projects to the list again.

Added eTracer curves for: 3A/167M, EC8010, RS241, 6S19P, 5842Q

Added the curves for 6S4P-DR, 6J49P-DRU [triode], UX-171, E810F [triode], EL34 [triode], EL84 [triode], 1G4GT, 50, KC3.

My first attempt at having a decent PCB made for the passive part of the DC filament supplies. These will go inside a seperate chassis with the transformers, the current source will go inside the signal chassis with the actual tubes. Fingers crossed they come out OK.

After having used old tube scopes for over 20 years, I finally bit the bullet and bought something from this century, heck, this millenium. Now I can finaly do some decent measurements again. I found a Rigol DS1054Z at a good price that had a sale to include all the extra software options (might never use any but it's freeeeeeee). It's a four channel 50MHz scope than can be hacked to 100MHz; gotta love software options.

Put the eTracer to good use and found a good operating point to aim for in the output stage. See the info here on the project page.

After playing with the eTracer for a while, I realized I had not done the most relevant tube yet. Shame!! Here it is: Click here

So many exciting ideas to try out as an alternative to the 5842 driver in my 1626 amps. Besides all the high-gm little triodes I have, the pentode fettish has peaked my curiosity. Sometime last decade I bought some pentodes already, which makes me think I wanted to try some even back then but never got around to it. So a good opertunity to make good on that. Some candidates will include Mullard E180F, WE 404A/5847, Siemens D3a, Amperex 6688, Philips E810F and the russian 6E5P, 6E6P-DR(U), 6J9P, 6J11P, 6J49P-DRU.

Ordered the output transformers for the 26 Usagi preamp. I'll be trying out my first set of Lundahl transformers in the form of the LL2763A which has 4+4:1+1+1+1 taps for 8:1, 4:1 or 2:1 ratios. I was thinking of a 2:1 primarily, but couldn't really make up my mind. Now I can have it both ways :)    The rated 7mA and 280H is perfect for the 26.

Along with the 26 stepdown I also scored some Amplimo 18V/4A transformers that were on sale for €12 each. These will go into the filament supplies for the Usagi and Yojimbo amps.

Just re-enabled user registration after setting up spam protection. Have at it guys ;)