Where to get Vacuum Tube Valley magazine?
Hi guys, I've read 3-4 copies of the VTV magazine borrowed from a friend and I simply love it, especially on the tubes review sections. I wanted to get the whole set as collection but too bad I found...
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Mystery ICs 1981 Synthesizer DIY
I recently aquired an analog synthesizer module. It is called Super controller 8190. I have the shematics. The ICs are vaguely identified. Could someone please help to identify these? I am uploading...
View ArticleFree air woofer question...
What would be the best way to get the most bass out of this woofer. I want to mount it in a box of some sort... should it be an open back box? 15" Super Pro Free Air Woofer 4 Ohm PWFA15 US Excellent |...
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Add Highs to Cheap Guitar Speaker (wordy, but with pics)
I don't post much here, if I have at all, but there is a wealth of info that I digest on regular occasion. Lately it's been speaker treatments and phase plugs and all the cool things you guys are...
View ArticleCLC vs CLCLC Filter Power Supply
Could someone tell me the pros and cons of CLC and CLCLC filter ? I have read from 2 sources that one filter stage results in a fast PS and sound better. However, two filter stages result in a smoother...
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Help with WinISD Pro Alpha 0.50a7
I am trying to model a pair of Alpine SRW-1022D subwoofers in WinISD Alpha Pro 0.50a7. The program apears to be corruped; I can't close it without using Contol/alt/delete. I would like to un and...
View ArticlePotting the input stage changes tone?
I was just wondering if anyone has had any experience in potting an amplifier's, or preamplifier's circuit, or partial circuit? I've heard these pros and cons: Pros: Thermal stability. Shock...
View Articlepower flickering on tube cmoy amp
Hello, I made a 12au tube cmoy amp from a kit on ebay. It worked great for a while, but now the power is blinking on intermittently but won't stay on. The led light below the tube flicks on then off...
View ArticleTechnics SB-7000a
I got myself a near mint pair of Technics SB-7000a's, was wondering if anyone has ideas for a good replacement tweeters in case mine go out. Parts are rare, so hope someone has some ideas so I can have...
View ArticleDC Offset readings?
Is this a normal reading? I set my multimeter to DCV 200m and let the amp sit for a few minutes with no speakers attached. I got these readings Left = - 09.2 Right = - 11.5 That seem a bit high to me,...
View ArticleWhich to build / Listening Impressions? Ekta Grande, NADA, or Illumina-66?
IÂ’m looking for a floorstander for my living room/theater. The living room system is an Integra DHC-80.2 > Emotiva XPA-5, with dual DIY JL Audio 12w7 subwoofers, Polk LSiFX surrounds, and a...
View ArticleAnybody discover a fix for Stiff Surround Syndrome?
I've read the threads that searching serves up. I was just wondering if anyone had discovered a good solution in the last few years. I have fairly large pile of FE103 variants that have stiff...
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FS Universety Loudspeaker Coax/triax 312
Coax is in the perfect working condition. Original L-pad is a bit crunchy and needs cleaning. The company was located in White Plains NY and it looks like was affiliated with Altec. The driver is most...
View ArticleHifonics BX2200D
I just finished with this amp and I am missing the 4 mounting feet. Does anyone have the 4 little mounting feet that screw to the bottom of the amp???? Thanks as always.
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Telefunken ELA V211/1 Power Amp
High power mono basic amp from the early 1960s. Has 2 Telefunken EL156 tubes and HUGE transformers. Too heavy to ship safely. $250 obo. Can be inspected & picked up in Los Angeles. Attached Images...
View ArticleHow important is spider stiffness?
I'm repairing some vintage woofers with brittle/crumbling spiders with new spiders that seem to really firm up the woofer. Am I screwing up the T/S parameters of these old woofs. They still go low but...
View ArticleDynaco Stereo 400 Headache
I've been working on a Dynaco Stereo 400, trying to get it back to life. One channel works fine, but the other is almost dead with only a very faint sound you can hear when you put your ear to the...
View ArticleBalanced Phono RCA Only
My turntable has only RCA outputs (no XLR support) that cannot be detached from the unit. I am designing a fully balanced phono stage that works both with MM and MC cartridges, with a variable load...
View ArticleAnyone looking for a pair of Nos/Nib Tung-sol 6550s?
I got a pair here looking to part with, they are not the black-plates just the 3 holers, they test excellent, never been out of the box hardly I doubt xD
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