external pitch on a turntable
Hello, I just bought a Vestax PDX 2000 mk2, and I would like to modify the pitch control. Actually, I want to control the "ultra pitch" (+/- 50%) with an external device. So, there is 2 options: 1)...
View ArticleMeasuring stray inductance of a transformer with two sec. windings?
Hi! There has been a lot of threads about stray inductance measurement, but I have not found the bit that interests me. My question is - when measuring one secondary should I short the other along with...
View ArticleWTB: Tang Band W4-1720
Hi, if someone on the forum has a pair that they would like to part with, I would be interested in buying them for a speaker project. I am located in Croatia, not EU yet, but close. Cheers, Marko
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The crossover point for the new tweeter
I got a tweeter few weeks ago, and tested the frequency response and impedance curve, the impedance is 8 ohm, Would you like suggest the xover point for it? can be set it to 1.6kHz? Attachment 349010...
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pse300B
I started a new project 300B PSE. In the original scheme of the PSU electrolytic capacitors are Mundorf: 250mkF-10H - 250mkF-15K-100mkF-15K-100mkF . Please tell me if I could put in their place MKP...
View ArticleThoughts on rectifiers for the SSE?
I've been rolling different rectifiers in my SSE. jj5ar4, RCA 5u4gb, RCA 5y3gt. and I just picked up a used 5u4G of unknown pedigree, in an ST envelope. I realized recently the 5u4 exceeds my...
View ArticleTips for a New MKIII Hx build
I'm about to build a DX blame MKIII Hx amp and wanted to know if there were any tips or changes I should know about as a lot of you guys have already built one. I'm buying some left over boards from a...
View ArticleWhat music did you last buy?
I last got a Lynyrd Skynyrd Greatest Hits LP (73-79) (2 record set) And a RATT cassette - Invasion of your privacy
View ArticleLtSpice = Scruffy ?
I've noticed a LOT of posted designs have Lots symbols & text etc etc, overlaid on top of each other :( Is this a failing in LtS, or users not tidying up ?
View ArticleFermi paradox?
Any thoughts on, Fermi paradox... looking at it as though presented in a court of law<<<beyond reasonable doubt. Fermi paradox - Wikipedia, the free encyclopedia Regards M. Gregg
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What usually fries when electronics are supplied with reverse voltage?
My friend lended his GPS tracking device to another friend and this guy manages to connect it with reversed voltage. It's supplied by 12V off a car. So I opened it up and there's some obvious damage on...
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Linkwitz wm-61a mod preamp PCB, any comments?
Hey guys, I have designed a PCB for Linkwitz WM-61a mod preamp. I went for a design with two gain options (x10 and x100), pseudo balanced output (hence 200ohm resistors). Also, I wanted to make it...
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Alpair7/Scanspeak 18WU/8741 Fast
Some time ago I built my first speakers based on alpair 7 and modified pensils. They sounded very good but after a while a started to want a little improvement in the bas region and it also seemed that...
View ArticleLM3886 in Differential Amp config to kill ground loops
I was wondering if using the LM3886 in a differential (inverting) topology would be a good way to kill ground loops. I say inverting because that way the signal ground doesn't even get referenced to...
View ArticleWhat Crossover for a 7 speaker box
I am designing a new Speaker cabinet each will have 7 speakers 3 Tweeters ( different ) 2 Midrange 8in 2 Woofers 15in Cabinets will be about 6ft 3in and 24 inch x 24in any advise would be great...
View Articlewill a 2235h recone work in a 2205a alnico basket
hey guys ive got a pair of alnico jbl 2205a drivers here and as mentioned above will a 2235h recone kit work in my basket ? i read somewere once that some one did it two a 2226 with great success ive...
View ArticleOpamp power bypass
I realise this is a basic topic and has been covered many times, but I have not been able to find a definitive answer. Many opamp datasheets calls for a small capacitor at the pin of the opamp in...
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7815 and 7915 output problems
hi all, I built this ps and added a 7815 and 7915 regs at the end of it but.. when I plug both regs i have +15 in 7815reg's out but the 7915's output dosent work, and when I disconnect 7815, 7915 works...
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Pass B1 Buffer Preamp help
hi to all I need help with the Jfets pin order. I need the Gate, Drain, Source, pin location. Attached picture of the area , with numbers. Thanks Attached Images Q100 101.jpg (39.8 KB)
View ArticleLaptop batteries?
Hi chaps, I'm looking for some advice on buying laptop batteries. My laptop's a Dell N5010. I've had it for about 9 months, and the battery life has been uniformly terrible. I suspect this is because...
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