luvdunhill Posted January 5, 2019 Report Share Posted January 5, 2019 Anyone ever run across solderable bus bars? Here is a picture of them being used in a Rowland amplifier.http://www.shine7.com/audio/jeff.htm Quote Link to comment Share on other sites More sharing options...
Pars Posted January 7, 2019 Report Share Posted January 7, 2019 I got a number of hits searching on “pcb busbar”, including this one on stackexchange: https://electronics.stackexchange.com/questions/59735/creating-a-high-current-bus-on-a-pcb (Sorry, Hand-typed, hopefully works. Also, I’ve been out of town and didn’t take a close look at your pics).Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Blueman2 Posted January 7, 2019 Report Share Posted January 7, 2019 (edited) I was interested in the copper bar used to hold the silicon devices to the heat sink. Pretty neat idea I had not seen before. Of course, it requires a board layout that leaves room for that bar to avoid conflict with resistors, etc. Also requires that all devices under the bar are the same thickness which may not be the case when mixing different devices to the same heatsink. I does have the advantage of drawing heat away from both sides of the device. And no need for peek screws! I wonder if devices are even engineered to take compression like this, vs just being held down by the hole mounting built into the device? Edited January 7, 2019 by Blueman2 Quote Link to comment Share on other sites More sharing options...
UFN Posted January 7, 2019 Report Share Posted January 7, 2019 (edited) 54 minutes ago, Blueman2 said: I was interested in the copper bar used to hold the silicon devices to the heat sink. Pretty neat idea I had not seen before. Of course, it requires a board layout that leaves room for that bar to avoid conflict with resistors, etc. Also requires that all devices under the bar are the same thickness which may not be the case when mixing different devices to the same heatsink. I does have the advantage of drawing heat away from both sides of the device. And no need for peek screws! I have seen the same used on discrete power amps with a thick and "spongy" thermal pad on the bar to even out the differences in thickness. Then it was possible to clamp e.g. both Sanken MT200 power transistors and TO-220 VAS transistors with the same bar. 54 minutes ago, Blueman2 said: I wonder if devices are even engineered to take compression like this, vs just being held down by the hole mounting built into the device? I would think that's fine. It also puts the clamping force directly on the body of the device and not on the flange, so there should be less risk of having devices that aren't completely flat against the heat sink (which would lead to thermal instability). Edited January 7, 2019 by UFN 1 Quote Link to comment Share on other sites More sharing options...
Dusty Chalk Posted January 8, 2019 Report Share Posted January 8, 2019 1/4" plugs (for, e.g., guitar cables, guitar pedal patch chords, etc.)? Quote Link to comment Share on other sites More sharing options...
Pars Posted January 8, 2019 Report Share Posted January 8, 2019 Redco.comSent from my iPhone using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
jose Posted February 16, 2019 Report Share Posted February 16, 2019 Please, Has anyone created the C2M1000170D in Multisim? Quote Link to comment Share on other sites More sharing options...
MartinC700 Posted March 2, 2019 Report Share Posted March 2, 2019 Looking for PZTA06 transistors for a Carbon build. They are backordered everywhere. Anyone got 8 they can sell? Regards Quote Link to comment Share on other sites More sharing options...
Scgorg Posted March 2, 2019 Report Share Posted March 2, 2019 Looking for PCB terminals (soldered on and with screws for wire) for my KGSSHV. Pin spacing is 5mm. Can't find anything rated for high voltages, everything seems to be 150/250V. Quote Link to comment Share on other sites More sharing options...
mdr30 Posted March 7, 2019 Report Share Posted March 7, 2019 Anyone got a TKD 2CP 601 stereo pot to spare? Quote Link to comment Share on other sites More sharing options...
mypasswordis Posted March 7, 2019 Report Share Posted March 7, 2019 (edited) On 3/2/2019 at 3:30 PM, MartinC700 said: Looking for PZTA06 transistors for a Carbon build. They are backordered everywhere. Anyone got 8 they can sell? Regards Ran out of spares but there should be plenty of substitutes, BCP56 should work and mouser has hundreds of thousands in stock. On 3/2/2019 at 5:48 PM, Scgorg said: Looking for PCB terminals (soldered on and with screws for wire) for my KGSSHV. Pin spacing is 5mm. Can't find anything rated for high voltages, everything seems to be 150/250V. Did you check Mouser? https://www.mouser.com/ProductDetail/Phoenix-Contact/5452258?qs=%2Fha2pyFaduhOh6w07UJSvZXaAYETWGY9mxlNZpKiRtk%3D Edited March 7, 2019 by mypasswordis Quote Link to comment Share on other sites More sharing options...
cspirou Posted March 7, 2019 Report Share Posted March 7, 2019 On 3/2/2019 at 12:30 PM, MartinC700 said: Looking for PZTA06 transistors for a Carbon build. They are backordered everywhere. Anyone got 8 they can sell? Regards I should have some. I need a bunch so I don't know what I can spare. Also I'll only sell with the PZTA56 complement. Quote Link to comment Share on other sites More sharing options...
mypasswordis Posted March 8, 2019 Report Share Posted March 8, 2019 11 hours ago, cspirou said: I should have some. I need a bunch so I don't know what I can spare. Also I'll only sell with the PZTA56 complement. BCP56 has a complement so there's no reason to do this. Quote Link to comment Share on other sites More sharing options...
Pars Posted March 8, 2019 Report Share Posted March 8, 2019 Mouser has 500 of the PZTA06 in stock. From a quick glance, the BCP has a higher rating... Quote Link to comment Share on other sites More sharing options...
mdr30 Posted April 14, 2019 Report Share Posted April 14, 2019 Does anyone possibly have a couple of sj109 to complement my sk389s? Quote Link to comment Share on other sites More sharing options...
gepardcv Posted April 18, 2019 Report Share Posted April 18, 2019 Does anyone have 16 pieces of PZTA06? They're really out of stock everywhere now. I don't need PZTA56, as I managed to buy a bunch at Newark. Quote Link to comment Share on other sites More sharing options...
shaihulud Posted April 30, 2019 Report Share Posted April 30, 2019 If you are still looking for some PZTA06, Digi-key has them available now. My back order just got processed and it looks like they have over 3,000 available. Looks like it is a good time to pick some up if anyone needs them for a project. Quote Link to comment Share on other sites More sharing options...
Pars Posted April 30, 2019 Report Share Posted April 30, 2019 On 4/14/2019 at 2:09 AM, mdr30 said: Does anyone possibly have a couple of sj109 to complement my sk389s? Check with this guy. Should be genuine. https://www.diyaudio.com/forums/swap-meet/335828-fs-nos-toshibe-2sk389bl-2sj109-bl.html Quote Link to comment Share on other sites More sharing options...
MartinC700 Posted April 30, 2019 Report Share Posted April 30, 2019 On 4/18/2019 at 1:16 PM, gepardcv said: Does anyone have 16 pieces of PZTA06? They're really out of stock everywhere now. I don't need PZTA56, as I managed to buy a bunch at Newark. I will check when I am home but should have quite a few , I'll see if I have 16 Quote Link to comment Share on other sites More sharing options...
gepardcv Posted April 30, 2019 Report Share Posted April 30, 2019 Thanks @MartinC700, but I just picked up 100 pieces from Digi-Key. As @shaihulud pointed out, it's finally back in stock. ? Quote Link to comment Share on other sites More sharing options...
MartinC700 Posted May 1, 2019 Report Share Posted May 1, 2019 Here's a plug for Arrow Electronics as a source for components. They don't seem to offer quite as broad a selection and Mouser, but pricing is generally better and shipping (at least to the US) is free and overnight regardless of order value. What is interesting is that parts in the same order often arrive in multiple overnight express packages from multiple locations. One order I placed had parts delivered from Las Vegas and Holland. 1 Quote Link to comment Share on other sites More sharing options...
Pars Posted May 2, 2019 Report Share Posted May 2, 2019 Yes, been using Arrow for quite some time now when they have what I need. A bit maddening to see a somewhat small order split into several shipments, each in considerably oversized packages with too much packing and this even when everything is a “ships tomorrow from the US” item...Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Hirsch2k Posted June 8, 2019 Report Share Posted June 8, 2019 Looking for a TKD 4CP-601 or 4CP-2500 50k log or a PCB for them. Thanks! Quote Link to comment Share on other sites More sharing options...
mdr30 Posted June 9, 2019 Report Share Posted June 9, 2019 (edited) Anyone got spare CFA boards, dynamic? Edited June 11, 2019 by mdr30 Quote Link to comment Share on other sites More sharing options...
Pars Posted July 11, 2019 Report Share Posted July 11, 2019 Never underestimate the obfuscating twats on diyaudio I asked a question regarding Kemet vs. Vishay-Polytech tantalum-polymer capacitors (since the Vishays are considerably cheaper and appear to be functionally identical), and get this: Quote Isn't that a conflict mineral? I stopped using tantalums in years ago for that reason. Aren't there alternatives? Well, maybe, but given the thousands used in the automotive and consumer electronics areas, 8 of these isn't going to make a dent. So I replied with this: Quote This is for a mostly SMT headphone amp (Gilmore mini SS Dynalo), and the tants are what was specified. I hadn't anticipated the obfuscation on the question... perhaps if I had realized that I would have added "the moral quandary" to the title. Given the many thousands of these used in the automotive and electronics industry, I don't think I'm going to worry about buying 8 of them for this application for which they are functionally and technically a very good fit. I'll take a look at both manufacturers websites; perhaps Kemet charges more for a more moral sourcing of their tantalum. I was a technician in the '80s for a semiconductor manufacturer, and saw plenty of the old wet tantalums blow up and start on fire, so I used to avoid tants like the plague. However, recent builds have shown them to perform quite well for power bypass duties. Perhaps a better moral question would be the horribly flawed EU lead study which resulted in ROHS. Arguably, this has contributed to millions of tons of failed consumer electronics clogging landfills. The US military still does not allow lead-free in its equipment, and I don't use the crap either. Perhaps just answer the fucking question? That forum drives me up a tree, but there are SOME very good an knowledgeable posters there. In their defence, I had provided the wrong Vishay part number. I'll see what happens when they wake up... And both Kemet and Vishay say that they source materials in a sustainable and conflict-free fashion. With Kemet, I can believe that. Vishay, being the sluts that they are, will say anything... kinda like the orange turd in the WH. 6 Quote Link to comment Share on other sites More sharing options...
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