AX84 BBS Recent Posts as of Fri, Aug 22nd, 2014 @ 20:17:27 http://ax84.com Amp Parts and KitsDoberman Music Products, LLC offers a variety of parts and kitshttp://shop.dobermanamps.com RE: yellen-on-fed(by RickTown) Well, 'Technically Speaking'... I sell tools to the construction trades. My business has been suffering at the same sub-par level since real estate crashed in 2007. Customers have gone under and the remaining ones usually have sob stories to tell. I lean a bit towards the "What Recovery?" side. Unemployment numbers only reflect those considered part of the work force and yet others remain out of work and beyond the unemployment benefits term, and not part of the equation that the current administration is seemingly using. (I say 'seemingly'). The U.S. is nearing a point of no return when more of the world rejects the Dollar as their reserve currency for regional transactions for oil and other commodities. This will cause the rest of the world to trade their Dollars to either adopt a new global reserve currency or to simply trade oil in their own currency or their neighbors' as has China recently when trading with Russia. Although this recession seems to roll on; if more of the world drops the Dollar due to the 'willy-nilly' printing we've done in recent years, it will force the Fed to choose between focusing on unemployment or raising rates to combat 'super-inflation'. Either way, we're kinda screwed... It seems like there's not very many options at this point that would work out to our benefit. Even though most of the product I sell is imported because there are no domestic manufacturers for this product, the only thing I might offer is to say, as an American, to "Buy American". These are my opinions and I'm certain they will vary from your own. I would like to reiterate what Kursad said. "Keep it technical" and friendly. Fri, 22 Aug 2014 14:35:51 -0400 http://ax84.com/bbs/dm.php?id=485993 yellen-on-fed(by Kursad K) The forum rules clearly state that any political discussion is not welcomed, but, maybe we could consider this to be technical subject (as technical as economics could be, I have no idea). In short I wonder what does this mean: <a href="http://www.nytimes.com/2014/08/23/business/yellen-on-federal-reserve-policy.html?_r=0 " target="newwin1408753051">[link]</a> and what has been happening in your side of the world during the last 7 years or so, because apparently nowadays it affects almost everybody on the earth. Thanks for any comments and remember to keep it technical..:) KursadFri, 22 Aug 2014 14:35:51 -0400 http://ax84.com/bbs/dm.php?id=485992 RE: Less work?(by dsmith) Reminds me of a story an old IBM'er told me when I used to repair mainframes back in the early '80s: Boss: Where have you been! Worker: Getting my hair cut. Boss: What! On company time! Worker: Yes. It grows on company time. Boss: It doesn't *all* grow on company time. Worker: I didn't get it all cut off. Fri, 22 Aug 2014 06:57:49 -0400 http://ax84.com/bbs/dm.php?id=485991 RE: Less work?(by stringbend) You sound like the one-eyed man in the UK who complained about full charge for an eye exam. (Maybe things aren't so bad after all). p.s. I cut my own hair. It's easier than you think. Fri, 22 Aug 2014 06:09:23 -0400 http://ax84.com/bbs/dm.php?id=485990 RE: how loud p1 should be?(by Stevo) You can remove the tubes and measure voltages at the tube pins to make sure they are getting voltage, but your measurements will be meaningless with regards to actual circuit measurements. That is, without the tubes pulling current, you won't get much voltage drop across any resistors, so your operating points are still just guess work. That being said, it's not a bad way to start off and make sure your HT connections are correct. And wiring your pots backwards will just make it so that you have to turn down in order to turn up. It wouldn't likely account for low output - unless there are further mistakes in wiring up those pots.Thu, 21 Aug 2014 22:29:50 -0400 http://ax84.com/bbs/dm.php?id=485989 Hybrid 1 Watter (not mine)(by Douche Baggins) Did a YouTube search recently for 1 watt amps and this: <a href="https://www.youtube.com/watch?v=tj1QDzKXlKY " target="newwin1408753051">[link]</a> is among many posted. Here: <a href="http://www.mediafire.com/download/4byapr79yqpqjkm/Little+Watter+V3.pdf " target="newwin1408753051">[link]</a> is the schematic/build link. Build pics: <a href="http://www.madbeanpedals.com/forum/index.php?topic=6869.0 " target="newwin1408753051">[link]</a> Cheers to nzCdog for the build, video and guitar chops.Thu, 21 Aug 2014 21:29:39 -0400 http://ax84.com/bbs/dm.php?id=485988 RE: how loud p1 should be?(by davefitz) <div class="quoteblock" >On 06/06/2014 @ 09:48, spud wrote : You are way low! You should be at around 32 volts, here's why: : : Power=Inductance * Voltage (P=IV or P=IE) : </div> A minor detail because you have the numerical values correct, but power = current*voltage, not inductance*voltage. "I" in electrical formulas represents current.Thu, 21 Aug 2014 14:33:01 -0400 http://ax84.com/bbs/dm.php?id=485987 RE: how loud p1 should be?(by Supakas) and i just relized that i have soldered all the pots in wrong way... 1 pin is 3 and so on.. can this cause the low output?Thu, 21 Aug 2014 08:26:33 -0400 http://ax84.com/bbs/dm.php?id=485986 RE: Dual Concentric 1 meg Pots?(by The Ballzz) WOW, Am I stupid or what? I guess it would be helpful to explain what I am trying to accomplish with these pots in addition to the offer for folks to get some. Let's assume an amp like a Marshall JCM800/2203/2204 type of amp that uses a 1 meg audio taper pot for gain and another for master volume. This is fairly typical. What I want to do is use 1 dual concentric 1 meg pot for gain and another for master volume, switched together in a manner allowing one balance of gain/master settings in one of the switch positions (lets say for my hum bucker guitars) and a different balance of gain/master settings in the other switch position (let's say for my single coil Stratocasters). While it would be a simple matter in a new build to just use 4 separate pots, this would not be as sanitary of a mod for an existing amp and especially as a mod for someone who owns a nearly vintage 80's 2203/2204, or similar, and would prefer not drilling and irreversibly modifying his amp. My plan is to make this foot switchable via relays and/or by a toggle switch when no foot switch is connected. Thanx 2 All, GeneThu, 21 Aug 2014 08:23:38 -0400 http://ax84.com/bbs/dm.php?id=485985 RE: Dual Concentric 1 meg Pots?(by The Ballzz) <div class="quoteblock" >On 08/21/2014 @ 06:52, boblove wrote : Have you looked at Hoffman.... I see he has dual pots. I'm not sure they're exactly what your looking for . : : <a href="http://hoffmanamps.com/MyStore/perlshop.cgi?action=template&thispage=PotsKnobs&ORDER_ID=479710140 " target="newwin1408753051">[link]</a> -- </div> No there are no dual concentric pots there. Just in case anyone is confused/unaware, a dual concentric pot provides 2 separate pots in one space, with one pot controlled by a normal type of knob and the other pot controlled by generally a ring style knob around/beneath the other, normal knob. A standard dual pot that has both pots controlled by the same knob/shaft is readily/easily available, not so for a dual concentric, especially in the 1 meg value that is typically used for gain and volume duties in an amplifier. Yes, I realize that a 1 meg/250k or 1 meg/100k could be wired in such a way to create different/switchable settings of level, BUT, remember that a volume/gain pot and the way it is used/wired is not simply a single variable resistor but actually 2 variable resistors that work in a particular balance to each other and are wired as a variable voltage divider, helping to preserve the balance of output impedance of one gain stage to input impedance of the next stage. Simply adding another variable resistor in series (in between) the ground lug of the main pot and ground or in parallel in some manner or vacuole other ways does not quite do the same thing. If I am on drugs in my thinking, I would truly appreciate someone setting me straight. If there is a different "proper" way to skin this cat, I'm all ears! Sorry 4 The Long Ramble, GeneThu, 21 Aug 2014 08:05:22 -0400 http://ax84.com/bbs/dm.php?id=485984 RE: how loud p1 should be?(by Supakas) Hellouu... its been 3 months.. and im back to this project.. question.. can i remove the tubes and power up the amp to measure tube pins.. because i have used thermo Plundering inside, so i cant measure inside the amp.?? KalmThu, 21 Aug 2014 07:09:46 -0400 http://ax84.com/bbs/dm.php?id=485983 OT impedance match(by BaltorTinazli) Hi; I have an OT which has 18,4k primary impedance instead of 22.5k with 8 ohm speaker. Is it ok or any disadvantages with it? I have bought five sets of them 4 years ago to build fireflys. But i could start building it yet:) Voltage ratio is 1:48. Impedance ratio is 1:(48)=1/2304====>2304*8ohm=18,4k. It has center tap also. I have built HO,20WPP amps before. Great site great people.Thanks. BaltorThu, 21 Aug 2014 07:03:19 -0400 http://ax84.com/bbs/dm.php?id=485982 RE: Dual Concentric 1 meg Pots?(by boblove) and..... <a href="http://www.tubesandmore.com/products/potentiometers_0?filters=Value/Size%3DDual%2CResistance%3D1M" target="newwin1408753051">[link]</a> Thu, 21 Aug 2014 06:54:08 -0400 http://ax84.com/bbs/dm.php?id=485981 RE: Dual Concentric 1 meg Pots?(by boblove) Have you looked at Hoffman.... I see he has dual pots. I'm not sure they're exactly what your looking for . <a href="http://hoffmanamps.com/MyStore/perlshop.cgi?action=template&thispage=PotsKnobs&ORDER_ID=479710140" target="newwin1408753051">[link]</a> Thu, 21 Aug 2014 06:52:06 -0400 http://ax84.com/bbs/dm.php?id=485980 RE: Dual Concentric 1 meg Pots?(by The Ballzz) FWIW, 500k is easy to find. 1 meg needs to be custom ordered/made. Once I have enough interest to make it seem feasible, there will be at least a 4-6 week lead time including shipping from the U.K. I just don't want to get stuck sitting on 65-75 pots more than I need! Please note that this is NOT intended as a for sale thread, but simply an offer to allow interested folks an opportunity to put their hands on something otherwise unavailable, AT TRUE COST. GeneWed, 20 Aug 2014 20:43:40 -0400 http://ax84.com/bbs/dm.php?id=485979 RE: Dual Concentric 1 meg Pots?(by The Ballzz) <div class="quoteblock" >On 08/20/2014 @ 19:48, davent wrote : Dual 500k's and others as well as knobs can be had here, but no dual 1M's. : : <a href="http://www.guitarelectronics.com/results.cgis?catalog=COMMON&keywords=concentric&x=0&y=0 " target="newwin1408753051">[link]</a> -- </div> Been there, gone that, got the T-shirt! That's why I'm making such a big deal over being able to have these made. Price for anyone who wants to get in before I shell out for them would likely be in the $8-$10 each range (my total cost) plus "actual" shipping from Las Vegas, no handling charge BS. I'm not asking for anything up front other than a friendly commitment to an approximate quantity. Anyone who wants them "after the fact" will see a markup to about what other dual concentric pots retail for in the $14-$18 range. Even a handy guy is going to spend $20+ for the 3 pots needed to cannibalize/make them himself. Thanks, Gene Wed, 20 Aug 2014 20:35:54 -0400 http://ax84.com/bbs/dm.php?id=485978 RE: Less work?(by davent) I've always had way, way, way more hair then my wife, same person has cut our hair for well over twenty years and i've always been charged far, far less then her. daveWed, 20 Aug 2014 20:16:19 -0400 http://ax84.com/bbs/dm.php?id=485977 RE: Dual Concentric 1 meg Pots?(by davent) Dual 500k's and others as well as knobs can be had here, but no dual 1M's. <a href="http://www.guitarelectronics.com/results.cgis?catalog=COMMON&keywords=concentric&x=0&y=0" target="newwin1408753051">[link]</a> Wed, 20 Aug 2014 19:48:47 -0400 http://ax84.com/bbs/dm.php?id=485976 RE: Dual Concentric 1 meg Pots?(by JeffW) I am interested but would want to know the ratings and type. 500K would be useful as well. I have looked over the years but not found much for pots or knobs. Some guitar oriented stuff out there.Wed, 20 Aug 2014 19:17:57 -0400 http://ax84.com/bbs/dm.php?id=485975 RE: Less work?(by Darren Porter) <div class="quoteblock" >On 08/20/2014 @ 10:38, dsmith wrote : <div class="quoteblock" >On 08/20/2014 @ 10:22, Darren Porter wrote : : Ah I was wondering if anyone would get the reference! You remember the name of the song? : -- : : </div> : : "Why should the devil have all the good music" ?? -- </div> Nice.Wed, 20 Aug 2014 17:28:02 -0400 http://ax84.com/bbs/dm.php?id=485974 RE: Less work?(by dsmith) <div class="quoteblock" >On 08/20/2014 @ 10:22, Darren Porter wrote : Ah I was wondering if anyone would get the reference! You remember the name of the song? -- </div> "Why should the devil have all the good music" ??Wed, 20 Aug 2014 10:38:38 -0400 http://ax84.com/bbs/dm.php?id=485973 RE: Help! How is this possible?!?(by tooltime) CE has actually pulled all the black boards and is sending them back to the manufacturer.Wed, 20 Aug 2014 10:37:57 -0400 http://ax84.com/bbs/dm.php?id=485972 RE: Less work?(by Darren Porter) Ah I was wondering if anyone would get the reference! You remember the name of the song?Wed, 20 Aug 2014 10:22:25 -0400 http://ax84.com/bbs/dm.php?id=485971 RE: Help! How is this possible?!?(by Stephen Keller) <div class="quoteblock" >On 08/20/2014 @ 06:23, tooltime wrote : I was able to replace the board last night with great success! The amp was so quiet I didn't even know it was on.. </div> Very cool! It is good when the amp is quiet at all the right times. StphWed, 20 Aug 2014 09:49:44 -0400 http://ax84.com/bbs/dm.php?id=485970 Dual Concentric 1 meg Pots?(by The Ballzz) Hi All, This is my first post, so please be gentle. I have searched for 1 meg dual concentric pots and found them to generally be made of "UNOBTAINIUM", however, I have finally found a source to have them manufactured in reasonable quantity at a fair price. I'm wondering if anyone, besides me, sees or understands the potential use(s) for such a pot? I have not yet placed my order and am exploring interest in any of these at a reasonable cost. This is not intended as a "for sale" post simply seeing if anyone would want a few of these if I were to acquire100 or so of these. If no interest, I will likely not make the investment. Thanks In Advance, Gene Thu, 21 Aug 2014 08:23:38 -0400 http://ax84.com/bbs/dm.php?id=485969