El_Doug Posted July 19, 2011 Report Share Posted July 19, 2011 Isn't he mawied to Incontinentia Buttocks? that's my very good friend's wife's name! Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 20, 2011 Report Share Posted July 20, 2011 (edited) Maybe we should group-buy the Tek probe and share it around. I suspect that we will not often have a situation where more than one builder at a time is at the stage where construction is near completion and he needs to measure stuff. I actually found one "AS-IS" for more than I wanted to pay, but less than most out there. Risks are fun! The deal is, it's lacking the power supply and some of the probe accessories. Looks like it needs a simple 9v 500mA wall wart, but no idea what the plug size is. I guess we'll see. If it works out, I'd be willing to rent it out. I'm wondering if I could just plug this into my distortion analyzer directly? I need to do some more research. If so, that's very sweet. Edited July 20, 2011 by luvdunhill Quote Link to comment Share on other sites More sharing options...
Lil Knight Posted July 20, 2011 Report Share Posted July 20, 2011 they're $51.10 at the 1-24 qty, and get as low as $35.26 at 100-249 qty. The price was $34.86 for 10 in 2006 That's much better. Hard to swallow the $100 price tag for a single connector. Quote Link to comment Share on other sites More sharing options...
swt61 Posted July 20, 2011 Report Share Posted July 20, 2011 Isn't he mawied to Incontinentia Buttocks? No, no. If memory serves Cocus Knobus married Venerialla Vulva. Incontinentia Buttocks married Pussicus Uerethra. Quote Link to comment Share on other sites More sharing options...
Kerry Posted July 25, 2011 Report Share Posted July 25, 2011 Got the Amp and PS done, just working on the umbilical cords. I'm going to make them 30" which allows for both side x side or stacked configurations. Amp... PS... Quote Link to comment Share on other sites More sharing options...
blubliss Posted July 25, 2011 Report Share Posted July 25, 2011 Very, very nice Kerry. Your PS wiring is 1000% better than mine Quote Link to comment Share on other sites More sharing options...
Voltron Posted July 25, 2011 Report Share Posted July 25, 2011 Whoa, that is awesome! Beautiful work Kerry. Quote Link to comment Share on other sites More sharing options...
deepak Posted July 25, 2011 Report Share Posted July 25, 2011 Very nice Kerry Quote Link to comment Share on other sites More sharing options...
livewire Posted July 25, 2011 Report Share Posted July 25, 2011 Me likey! WANT! Someday..... Quote Link to comment Share on other sites More sharing options...
wink Posted July 25, 2011 Report Share Posted July 25, 2011 Me likey! WANT! Someday..... . X 2 Quote Link to comment Share on other sites More sharing options...
n_maher Posted July 25, 2011 Report Share Posted July 25, 2011 Very nice work Kerry. Quote Link to comment Share on other sites More sharing options...
crumpler Posted July 25, 2011 Report Share Posted July 25, 2011 Gorgeous gorgeous amps! Any impressions on how they sound? Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted July 25, 2011 Report Share Posted July 25, 2011 (edited) Erwin from Australia just sent me a wonderful piece of very dense Red Mallee Birl. So i think i will make a few more knobs tomorrow Edited July 25, 2011 by kevin gilmore Quote Link to comment Share on other sites More sharing options...
swt61 Posted July 25, 2011 Report Share Posted July 25, 2011 NICE!!! Quote Link to comment Share on other sites More sharing options...
wink Posted July 25, 2011 Report Share Posted July 25, 2011 (edited) very dense Red Mallee Birl. So i think i will make a few more knobs tomorrow . The colour will more in keeping with the thermal qualities of the T2...... Edited July 25, 2011 by wink Quote Link to comment Share on other sites More sharing options...
Kerry Posted July 26, 2011 Report Share Posted July 26, 2011 OK. I've got one umbilical cord ready and I'm going to go through a final check before powering this puppy up. Any last thoughts from the group? Quote Link to comment Share on other sites More sharing options...
Horio Posted July 26, 2011 Report Share Posted July 26, 2011 Cross you fingers. Good luck! Quote Link to comment Share on other sites More sharing options...
justin Posted July 26, 2011 Report Share Posted July 26, 2011 OK. I've got one umbilical cord ready and I'm going to go through a final check before powering this puppy up. Any last thoughts from the group? yeah, check again after that. Quote Link to comment Share on other sites More sharing options...
wink Posted July 26, 2011 Report Share Posted July 26, 2011 OK. I've got one umbilical cord ready and I'm going to go through a final check before powering this puppy up. Any last thoughts from the group? . Check the life insurance and hospital cover. Get ready to purchase lottery tickets...... Quote Link to comment Share on other sites More sharing options...
Kerry Posted July 26, 2011 Report Share Posted July 26, 2011 (edited) Double checked everything and fired up one channel at a time. I was able to adjust both batteries to 740V without any issues. My outputs are all sitting around +18V (seems close), but I'm getting some noise. A bit of crackling and buffeting (shifting white noise). Not too loud, but very present. Interesting it is pretty much the same on both channels. I'm going to start checking some more voltages. Any thoughts? EDIT: Both channels play music. When I connected a source to the right channel (SE) it seems to have stopped the noise (I need to double check this). Left channel still has noise, but plays music. EDIT 2: I've got both channels up now at the same time (finished the other umbilical). The right channel is identical to the left channel with respect to noise. I mistakenly thought there was no noise on the right channel because I plugged the headphones into the jack without bias power (since I only had one side powered). Both channels now play music, but the noise is still there. As I turn the volume up, it seems to diminish a bit but is still present. I can already tell that this going to sound remarkable. Edited July 27, 2011 by Kerry Quote Link to comment Share on other sites More sharing options...
Kerry Posted July 27, 2011 Report Share Posted July 27, 2011 I've checked a bunch of differnt voltages and everything seems fine. I also put the amp up on the oscilloscope to check for any oscillations, but only see what looks like random noise. I'm starting to suppect the input tubes and Kevin felt that that could be the issue. I'm going to try and get some cheap input tubes to confirm the diagnosis. Quote Link to comment Share on other sites More sharing options...
FrankCooter Posted July 27, 2011 Report Share Posted July 27, 2011 Totally ignorant and out of my league here, but since you've asked for thoughts I'll throw in my two cents. The input tubes are a good place to start. Cheap spares that have worked in another circuit are excellent for test purposes. Are the pins clean and shiny on your input tubes? I've had trouble with NOS tubes making noise because of dirty or oxidized pins. This can also happen with sockets. I'm sure you've considered this, but since the noise is common to both channels, did you scope all the power supplies, including the bias, at their outputs ? If the power supplies are clean, I'd work my way with the scope back from the output , looking at the input signal to each stage. If the noise was on one side only, I'd be thinking a bad connection or wiring error somewhere, but since it's in both channels, it's got to be something in common. Either power supply or defective components that are used in both sides. Hopefully you'll hear from somebody who knows what they're doing here. Quote Link to comment Share on other sites More sharing options...
Kerry Posted July 27, 2011 Report Share Posted July 27, 2011 I did scope the outputs and I'm seeing random noise on the scope. Because of the feedback, I'm guessing it will carry its way throughout the circuit. If there is noise on the bias line, it would not affect the outputs on the scope. You are right and I will check the all of the power supply outputs on the scope, though I'm not expecting that to be the issue since I'm scoping each output with reference to ground I'd likely see any oscillations in the outputs. Also, the noise is not in sync between the left and right channel. Same type of noise, but different and in stereo The pins do have some oxidation so I was going to try cleaning. Not sure of the best method yet. Recommendations welcome. I appreciate your two cents Quote Link to comment Share on other sites More sharing options...
guzziguy Posted July 27, 2011 Report Share Posted July 27, 2011 I use emery boards and small wire brushes. Quote Link to comment Share on other sites More sharing options...
Voltron Posted July 27, 2011 Report Share Posted July 27, 2011 Quote Link to comment Share on other sites More sharing options...
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