mosfet transistor date codes??
Im replacing transistors in a couple Memphis st1000d's. I only need 6 irf640's and 12 irf9640's. Im unable to get matching date codes unless I order 50 of each from Mouser. I tried ordering from Jameco...
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Problem with board amp
Hi! I am having problems with my ebay board amp (TK2050). I'm not getting any sound out of it at all. This is my second identical unit. I thought that the first one was broken so I ordered another one....
View ArticleHelp please: need wiring schema for S&B TX-102 TVC
I'm building up a simple TVC with some Stevens and Billington TX-102 transformers that I got a while back, and I can't find the wiring diagram that I printed off their site some years back. They've...
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Black Rhodium New Year Clearance at MCRU
As the UK's leading dealer for Black Rhodium Cables, MCRU have a number of their excellent cables on clearance via our website, all are new with factory terminated connectors, if you are considering a...
View ArticleJust found a good deal on 5.25 Dual Cone 20 Watt Speakers
Hey everyone, just found this, thought some here might be interested. 5.25" duo-cone, no specs unfortunately, but hard to argue with $1.99 each. SALE! - 5.25 Dual Cone 20 Watt Speaker-Electronic...
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Need some bias control help
Need help on modding the bias circuit on my Mono block amps. Attached is three different circuits used to bias the output tubes. These circuits have been used on many version of this amp, and are on...
View ArticleDual LM386 Not Working
Forgive me for my lack of understanding, but I'm curious why this doesn't work. I'm trying to run dual LM386 chips off of a single 9V power supply and perhaps that's the main issue. I basically built...
View ArticleWTB JBL E145 baskets.
Hello. IF anyone have blown E145`s lying around waiting for those impossible to find oem recone kits, why not sell them to me instead? I am looking into building a pair of rather large speakers with...
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My collection of MA speakers
From outside to inside: A12P MLTL; A10.3 MLTL; A10P BR. On floor A7.3 TL Bob Attached Images MA_Family.jpg (81.8 KB)
View ArticleLowther DX3: in which cabinets have you heard them?
I would like to know which cabinets have you had experience with. I know it all depends on music, room, amplifier, taste, etc, but maybe we can tell our experiences here and have some winners and...
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DC on tda7293 output
I've just completed the build of a stereo kit using a dual amp board purchased from eBay. I powered it up and I'm getting 30v DC on both outputs. I can't find anything visibly wrong (shorts, etc) I'm...
View ArticleAmp help
I have an amp and preamp ( Hitachi HMA-8300 series E) It no longer works. The needles don't budge when its turned on. Any ideas as to what the problem would be?Or worst yet.. the cost?
View ArticleDiy wanabe, newbie.
Hi all, Steve here , newbie to diy, would like to simply say thanks to all who make this site possible, have spent 30 + yrs. as an electrical/electronic assembler, really hoping that an old dog can be...
View ArticleY148 has noise (beginner)
Hi all, I have recently been working on a little audio project for myself. I'm at a point where everything is working perfectly, expect the last phase of the audio output. As my electronics knowledge...
View ArticleGold Lion kt77 bias help?
Hey Guys, I am going to swap in a pair of Gold Lion KT77 for SED EL34 and running in Triode.I am running 424v plate and 35v cathode on SED. what kind of plate and Cathode voltages should I be looking...
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diy subwoofer spare wheel install
hi im new to this forum iv just finished my own subwoofer spare wheel install im just finking is there soposed to be a bass reflex tube installed aswell . as most subs have them .is sounds rearley good...
View ArticleWHY DOES A DIFFERENT OT SOUND SO DIFFERENT?
I've had a Weber OT on my breadboard for all my testing (their "Deluxe" replacement, 6600 ohm CT/8 ohm sec), but wanted to use a used one I had kicking around, from a Hammond organ, its amp had 2 6V6s,...
View ArticleWTB: Pink Triangle Spare Parts
I know this is a long shot, I'm looking for spare parts, taken from any of the suspended Pink Triangle turntables. Specifically I'd like to find the acrylic platter and bearing. While I'd like the...
View ArticleAbletec, 900 Watt peak class D audio amplifier power supply +/- 53V DC
while browsing around ebay I found a guy selling these: Abletec 900 Watt Peak Class D Audio Amplifier Power Supply 53V DC UL Cul | eBay SMPS For $14.95 so I thought I would grab one and share the rest...
View ArticleSSE Noise Problem - Help?
Hi I have an SSE, about 6 years old. I use the SSE for the treble end of a bi-amped system. One channel is noisy (loudly hissing, sometimes pinging) the other almost silent. Swapped output tubes - no...
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