kevin gilmore
High Rollers
-
Joined
-
Last visited
Everything posted by kevin gilmore
-
its birgir's birthday today, the big 35! so... special security screws on the top, 6 sided ultra miniature metric spline, apple tools work power conversion relatively easy once you get rid of the goop
-
suggest you build the kgsshv-carbon first. do it as 2 chassis leave extra room in the power supply for a filament transformer and extra pins in the connector then you can build the GG as a second amplifier and use the existing power supply then even later you can upgrade the GG to DHT tubes simple
-
definitely not. srm727 output stage running at 5 to 6 ma, and tube front end. but we will have schematics soon.
-
in other news I have a tracking number now, so the t8000 is on its way
-
work in progress hangs off the side with thin angle bracket, no drilling of holes
-
5V thru a resistor or 12V driving the cpc1117N opto coupler so after 30 seconds you apply a voltage, delay timer 555 or similar, same as T2
-
the resistor marked open, put 100k there and see if it makes any difference. but with all tube amps, you really need a delay on the high voltage, most of the current high voltage boards have a switch, but you need a delay board to drive them.
-
no feedback and a voltage gain between 500 and 1000 yep that is going to work, for at least 15 minutes till the tubes drift.
-
a bit more current to bring the plate voltage down a bit
-
noise level due to input tubes?
-
That resistor was for lowering the gain when using the original opamp and a pair of diodes. will add a jumper once the board is verified
-
happy it works. now for a version with tubes as the constant current sources And a cherub has just informed me a t8000 is headed my way I like retirement. going to a hamfest tomorrow to see what I can find to update some of my very antique test gear
-
Short in the transformer to ground, seen it before
-
amp schematic uberamp2.pdf
-
looks fine to me, the oven door is no more than 2 inches in front of the cabinet faces. The previous oven which was a built in was probably 1 inch in front of the cabinet face all the heat goes up the back splash and under the feet of the oven out the front. favorite place of the dogs when the oven is on.
-
yep, and requires 60 amp circuit 220v
-
Before I got the Wolf oven/cooktop, I used a single burner cheap thing. Worked great. make sure you try a magnet on the pans you plan on using, some kinds of stainless pans are non magnetic and will not work. also they use 80% of the power of a typical kitchen circuit, so you can't use most other things at the same time
-
sounds like a shorted zener also easy to fix
-
-
-
biggest problem with this is that it can't handle anything like 1kv with the parts shown you can replace the lnd150 with a 10m90s or ixta01n100d cascode, then also use a ixta01n100d as the current source device. will test later
-
if you are going thru all that effort (and its a good idea) might as well add some hall effect devices on the power rails to monitor the bias current. something I did in the uberamp quite a while ago and that made the bias super stable, set it to what you want and it works. then if you want to get super silly, add dynamic bias
-
other crazy idea for dc to dc converter, using new products one of these the emitter http://www.mouser.com/ProductDetail/VCC/VAOL-5EWY4/?qs=%2fha2pyFaduhNUPpEGi%2fTWzIKry8%2bJh8FybMNufznF7kCONNnK6Yvsg%3d%3d and one of these as the receiver http://www.mouser.com/ProductDetail/Panasonic/AM-5904CAR/?qs=%2fha2pyFadugs7g8VUByJ5oE9GbMGgLjolVm%2fi%2bg9ILY8mwYKK3C03A%3d%3d
-
really think you should add the t2 current source modified with 2sc4686 and cascade current source to drive the led reference, that still synthesizes the best of everything
-
I will have to look that later, but I took the tube piece from the GG design edit: this is the same as the T2, so it is what I wanted.
