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Thought I'd briefly mention how nice this move is. But the stacking is awkward. I swapped my main active setup out today after thinking about it for way too long, and wow. I've had my freaking huge and blue Pioneer receiver (SX-D7000) running my ARs and ADS for about two years now. I...

I started a thread on this project on the musical instruments forum, but I think this is probably the better spot for tube circuit advice. The thread is here: For easier reference, I'm trying to convert a Voice of Music changer mono amp, and here's the original schematic: Here is what I...

Executive summary: I'd like some instruction for completing my conversion of a Voice of Music mono console tube amp to home/practice guitar amp. Can you tell me how to control volume and gain, preferably by adding pots? If you can help, you can skip to the schematic picture below, and the...

Hello all - I've been hiding a while. I found a sexy little Dual 1209 the other day with a good looking dustcover and stuff, could just use a new base since some veneer is peeling from the United Audio one. Also it needs to be lubed because its not really functional. So I'm a moron. In...

I just picked up a pair of Chorus II for a friend. I haven't heard them yet, but :banana: just the same. They're black, and have some wear on the finish. I've tried to find some references to it in this forum, but can't seem to - how would one go about evening out or renewing that finish...

I picked up a Curtis Mathes console a while back, and figuring out why it didn't work didn't take much work. Anybody know what's wrong with this rectifier? The outputs looked suspicious too: Ah, that's disappointing. I wonder if it can be sealed? Fortunately, that day and the...

Anybody know anything about this record? I grabbed it the other day because (1) it had some cool motown stuff on it (2) it had writing in Japanese characters on it, and (3) it was between about three other obi-type records I decided to pick up. I can't find a thing about it in my Goldmine or...

I'm working through issues on a Technics SL-1700 MkII that was sold to me as a basket case. Right now, I need to ID some screw sizes and then acquire them. This is where you come in... If you remove the platter, exposing the spindle and a black/gray tray under the platter, you will see a...

So I have an SL-1400 and an SL-1500, but only one good dustcover and one good speed control board (apparently) between the two of them. Which one do I want functional? Back story: I grew up with an SL-1500, belonged to my father with his Mac 1900. I still have it, and it works fine. It's...

I hate orphans. Single speakers suck the life out of me, because I can't stand to see one sitting there doing nothing, dislike seeing them parted out when the cabinets are in good shape, and it ends up costing me because I try to buy a mate. I'm sure I'm not alone in this. So I swore them...

I took a flyer on these two days ago. I found some older cabinets with no identifying markings and screw terminals in the back. When I felt a structure in the middle of the woofer opening, I thought of about 3 possible types of drivers that could be hiding there, and 2 were a very good idea...

Short version: what rating power switch do I need for a console amp mod to standalone? I'm preparing to rework a Zenith pp EL84 power amp - and I hope to solicit technical advice and possible improvements in another new thread - with my limited skills. I'm a little concerned about the PT, but...

I guess this is several questions in one. Does the sx-3700 have a reputation for the volume pot going bad the same way the sx-780 does? If so, is it the same pot? And if so, is there a suitable replacement without bizarre wiring solutions? My old 780 went bad when the volume pot...

I've got an odd problem with my Nakamichi SR-4A receiver. It's the top end of the STASIS circuit series - I've had the 3A too, this one is remote capable. All functions work (other than a dim LCD readout), DC checks out fine, and it sounds great until the Speaker A output cuts to one...

I've removed the big wooden rack I'd been using, and am returning to my overbuilt turntable shelf mounted into wall studs because my floor joists apparently suck. Oh yeah, also I have a 5 and 6 year old that love to run through and jump as close to the stereo as possible. It's fairly simple...

You folks with some experience on this - what do you do with the wiring harness? You know, the horsetail type thing? I've got an RCA and a Zenith (project forthcoming), both with wiring harnesses in those plastic plugs that used to power and be switched by the preamp/tuner. After pulling the...

I recently picked up a nice ST-70 from AKer Russellc. It's got what appears to be the older version of the Welborne mod circuit (old and new use the same tubes, but it appears the circuit is different). Does anyone happen to have that schematic?

I've got a Niles speaker selector, which is not currently in use. I was reading the manual, and came across a recommendation specifically for tube amps. It recommended placing a 150ohm 5watt resistor across the output connections in parallel with the speaker selector. Essentially, a resistor...

I hope the subject is sufficiently descriptive, as I'm looking for help diagnosing or fixing a problem with my primary turntable. I have a Technics SL-1400 that's operated flawlessly for about 2 years now. Suddenly, on Friday, it's developed a speed/pitch control issue I haven't seen. It...

Can anyone help ID the model of this tweeter? It's unfortunately completely unmarked. It at least _looks_ like a T35 type, but I'd like to be a little more sure. Dimensions are - Face of horn: 5.25" x 2" Depth: 3" Magnet diameter: 2.5" It was pulled from an Electrovoice Regal 300...

I've had a pair of Allison: Fours for about a year, and they're really astounding speakers. The top mounted woofers just sound right, and better than any other 8" bookshelf I have, and the angle mounted tweeters, while not unique, do excellent things for dispersion and just fill the room with...

Just ran across a pair of ginormous speakers with very little ID info on them. They appear to be Wharfedales. - They are approximately 3.5 feet square, standalone cabinets. The decorative wooden grill covers are removable, but not the cloth. - The back is partially open. There are two...

Well, I can cross another target of speakerlust off my list, as it took me 7 seconds to pick up a pair of ADS L-880/2s after they hit the thrift store floor. Actually, I'm not sure they ever touched the floor, as I did a mid-air spin to reverse course and follow the fine gentleman wheeling...

Thso of you who know such things, can you tell me if this is the correct we to go about it? I've got my AR-9LS speakers, which are not biamped. Running a 12", 10", 8", mid, and tweeter like this take lots of power, and most recomment ~200wpc. That's not something I have. I do have a 120 wpc...

What I thought was a tube score turned into something very different, but acceptable anyway. I bought and returned to pick up a console I *thought* was tubed locally. It turned out to be solid state, but when I came to pick it up, another combo appeared and left with me. So I came home with...