luvdunhill

http://www.eweek.com/c/a/Security/Shmoocon-and-the-Shmoo-Ball/

dare I ask what sort of specs a scope must have to reliably track this down?

WTF. Can anyone view this post in Tapatalk and confirm that yet another thing is broken now with Tapatalk?

Craig, I'm a bit confused, were you only having the problem in one channel? (from reading the mod it seems this way)

Win!

Gave a talk at a con where attendees are given balls to throw at the speaker at their discretion. I managed to come out unscathed.

30 years ago I had recently graduated from the 1 bag system

LP mailers, or DIY your own out of sheets of cardboard. Note that one strategy would be to buy more vinyl online and then reuse the mailers you get in the mail

Depends on the amplifier the amplifier is made to drive a target load though, just like a dynamic amplifier has given design constraints and goals. In the case of an ES amp, the load is the primary determiner of FR.

Nice, my wife hoards hers like you would not believe. At some point we had identical colors towels in the bathroom and I accidentally see hers and it wasn't pretty.. I had to lobby to get the colors changed to aid in identification.

meh, cannot hang with the Pegu Club bitters make everything that much better.

.. And I have no idea what a Gin Sidecar is Reks

French Fling, that's pretty nice

very nice!

Jacob: "After some tweaking (and using the values I have around) I've settled on 2k ohm R17-R18 and 1k in series with the pot. I'm using a 20k pot but the usable range wouldn't be much less with 5k." Marc: "My recommendation was R17, R18 = 10K and a 20K pot with a 3.3K series resistor. The two 5K resistors at the feedback point are also changed to 2K" digger945: "1K pot, 1K for series resistor (R62) and 2.2K for R17-R18" Kevin: "One other thing, i forgot to mention is the 5k resistors are now actually 2k on my prototype so as to match the gain between the two different feedback types." Heh, clear as mud.

don't raise the pot. Keep it 20K. Lower R17 and R18 to the values I suggested (in reading past posts, it looks like you didn't change these and kept them at 20K, is that right?). If you're only using two devices, go even lower for R17-R18, say 2K. Probably easiest to just parallel another value on the back of the board. What are the two resistors at the alternative feedback point? Did you use the recommended 2K? Perhaps we should find the ref designators for these parts so we don't confuse each other....

Here's what I would do. I'd try two pairs, have a DMM across one of the output resistors and turn it on and let that value settle. I'd leave it on less than 30 seconds or so, no longer. And immediately turn it off if say current is insane (1A) (I'd hook it up to a heat sink, but you could perhaps skip this if you're really careful). While it's on, verify that turn the pot up increases this value. Extra points for using two meters across, one for each FET. It might take a bit of travel for it to come up, but when it does it will come quick in this configuration. Record these values. Add another pair of FETs and repeat. Reset the pot. Again, one meter on one of the n-ch and another on the one p-ch output. Record these values. If these numbers are high (high, meaning relative to what you think your heat sinks can provide, that number is up to you to decide.., but post them here and we can philosophize) then we can go from there. I'm 80% sure it will be okay with 4 FETs but doing it with 2 might be a good exercise. I don't have any devices readily available

ok, but remember that the thing adjusts differently than the Dynahi (note amb mentions "bias" and well, you have a separate pot for that). I'd just set them at 500 and leave them and use one to adjust for offset. Like I said, I'd only install a single pot and a fixed 500 ohm resistor. Also, be careful in installing less output mosfets. You'll likely need to change the Vbe multipler values (the pot and series resistor) to accommodate. I'm sure I mentioned that somewhere in this thread, in response to someone wanting exact values for the parts. It will take experimentation, sorry.

you're probably better off just installing a single trimmer on CCS and using a fixed resistor on the other. What you have is fine for now, but once you start playing with it, it's easier to adjust one side and then get it close enough that the servo can handle things from there on out. I bet it even sounds a bit better that way.

Is this the sort of thing that super glue was invented to do, or is that an an urban legend..

x2 especially in Tapatalk. Are there fewer posts per day since the new software was installed?

meh, here's what I've done when people have sent me boards like this: 0.) remove the device 1.) use a heat gun and heat up the heat sink. Use a heat shield to avoid the PCB. Get 'em hot 2.) thread a piece of string through the hole so you have something to pull 3.) Use Chip Quik 4.) pull They pop right off, even on the beta22 boards where the holes are too small and pads too lame.

Let's say your right. However, that's not nearly as rewarding as say, building your own ES amp

one more point. The T2 has an input filter that is used to protect the input from unwanted RF signals. However, what many people don't typically realize (as they leave this filter off) is that this filter has a side benefit of improving the bandwidth of the feedback signal in various topologies, for example a differential pair input. It's a subtle point, but one worth mentioning here.

Justin, don't forget that the original did not need any compensation in the output stage as well.