kevin gilmore

i have a few left

typically you cannot get it to zero on both sides. But if you can, it should be stable

not only is that plug a piece of shit, its the wrong dimensions and will crack a real stax female socket.

singlepower would have used super glue. just like he did on all of those blackgate caps

i went back to the pictures to make sure all of the parts on heatsinks in the original are on the common heatsink bar in the diy-T2 there are 2sc3675's with no heatsinks in the original, and they are that way on the diy-T2

So i can certainly make some of those, and out of the metal that turns superconducting at LN2 temperatures. Put over a rare earth magnet, and they will spin for a very long time.

you do realize that giving me idea's like this is only going to cause trouble

very sweet now you need a 2 color power switch warming is one color, on is a different color (from joamat's T2 boards)

pass labs clone chassis. nice until you have to put the jack and knob on the front panel

not supposed to tap the heatsink. drill it the right size. transistors and screws and washer from the top, transistor, thermal washer,heatsink,circuit board,washer,nut

3 hours total 6 shots of various vodka's (new kickass Russian/French restaurant with 50 different vodka's) http://dekarestaurant.com/ and after generating the netlist, its still correct. scary The nice thing is this way you can drive all 32 relays at the same exact time. but unless you can calculate relay position, a lookup table is necessary board file posted, needs checking

but but... its upside down. anyway http://gilmore.chem.northwestern.edu/atten2stereobal.jpg 2.05 x 3 inches but only 2 layers and still have to add or change the drivers

yep 2 colums and both sides. you might as well put it all on one board because of the size of the drivers determines the minimum width if you solder all the resistors first, then possibly the inside row of pins on the relays could be hard to get at.

I actually think I can get a balanced step attenuator with those relays in the same size as the original, all 16 relays. But a human is unlikely to ever be able to assemble it.

transistors need to have a Vceo of 50v or more bias is 150 ma and the current mirror as the VAS means that the peak to peak voltage swing is 40V on +/-24v supplies absolutely flat to more than 5mhz

there were some pictures posted over there on the inside of the amp 7 tubes and a whole pile of output transistors

no matter what i order, or when, mouser is always backordered on something

absolutely. angle bracket version

http://gilmore.chem.northwestern.edu/cfa2.jpg

diodes are there to protect the inputs from voltages > +/-12 on those amplifiers with high power output

the amb method. trouble is they dont switch as fast that way. should be ok though.

been working on this one a while, with all the popular transistors disappearing, I hope that this one won't go obsolete before the boards are out. I don't think so because Fairchild has said that the bc parts should be available for at least 5 years but onsemi said the same thing. This one is a diamond transistor input set, used as a voltage to current converter. A pair of Wilson current mirrors with input and output cascade as the VAS and a triple darlington output stage. http://gilmore.chem.northwestern.edu/cfa2.pdf if someone knows of better surface mount parts to replace the bc series, I might as well do that from the start. ft >150mhz, hfe >100 Vceo >50 etc

how do you drive bipolar single coil relay with single switch to ground?

Birgir will be building the T2's. I am just going to watch. smaller version of my attenuator board, definitely want to see this. if you make it surface mount only, then you can shrink it a fair amount. The one knob control is definitely one of the better ideas.

new board uses 1 x 2n7000 http://gilmore.chem.northwestern.edu/protector3.pdf