amplifier

Hey Everyone, New to the community and working to put together my first set up since having 'adult money'. I managed to get a pair of ADS L710 speakers and have a Fluance RT-81 turntable. Trying to pick the right amp/receiver to pair them with. I'd like to spend less than $1,500 on both the amp...

Who likes a puzzle? Have just inherited a beautiful Leak 2100 integrated amplifier. In excellent condition, it appears to function really well. Great, but.. Looking at the pcb I see this (deliberate?) gouge into one of the traces, circled in red mark up. Can anyone tell me what effect this...

I've always loved mono tube amps with big transformers, and I also enjoy browsing the auction site (these are both undesirable traits). In any case, I make a mental note of every large, interesting pre-1960 mono amp that pops up. A while ago (I think a year or so?) I saw an amplifier called the...

Hey folks, I recently had an interesting experience and wanted to share this with you all to try and make sense of things and perhaps better understand how amplifier matching works. I currently use a pair of Sansui SP-X9000 and Acoustic Research M3 as my main listening speakers. I usually...

Hi Everyone, I know this has been posted about before, and believe me, I've read the threads. But I could use some advice. I'm looking for an amplifier to use with a pair of nicely restored Acoustic Research AR-2ax speakers. I'm currently using an Onkyo TX-8222 50 wpc stereo receiver. My...

I acquired a VAC PA-45 amplifier set (amps & power supplies) in mint condition (gold & piano black finish). They operate flawlessly. The PA-45 is the 2-EL34 version of the PA-90 (4-EL34); they are monoblocks with separate power supplies. Does anyone have any information on them, or using a...

Hello, I acquired a set of Valve Amplification Company VAC PA-45 (2 amplifiers & 2 power supplies). Other than the owners manual, I'm unable to find anything about them. They are in pristine condition; piano-black finish, and perform flawlessly. The PA-45 is the "little brother" of the...

I recently acquired a Magnavox 9302, and I'm in the process of rebuilding it. I've stripped the chassis completely, and I'm nearly done doing the mechanical work on the chassis... soldered over the extra holes, body filler, all the aesthetic stuff. I'm having some trouble with the schematic...

Calling any and all Carver gurus, There I was, just listening to some nice tunes with my Carver M500t and suddenly, burning smell, fuse blows, and silence… Crack her open and r181 is toasted. Nothing else looks affected (to the naked eye). I’ve done a fair bit of repair/ recapping, etc. but...

Hey all! Yesterday I bought a Kenwood KA-8100 that was advertised as broken. Today I need help in restoring it. The inside and outside of the unit are pretty darn clean. It appears as if one corner of the unit took a drop head on and bent but did a pretty good job of protecting the internals...

Hello, I'm new to the vintage Hifi world and have the opportunity to pick up the units noted above. The Marantz for $450 and the Kenwood for $350. They're both in working condition but show their age. Neither unit has been restored or even cleaned. Which is the better choice. Please see the...

Is it worth keeping a Marantz 2235 just for the phono stage? I'd then run it into a more modern receiver (Onkyo NR808) from the pre-outs to an aux in. One reason is that I have some 86dB sensitivity Elac DBR62's that I really like, but think they need more power to sound good at lower volumes...

Long story short- I found a single Goldmund VRS M2 mono amp at Goodwill. I stuck around for about an hour to see if they brought the other one out, but no dice. I'll check again tomorrow. Anyway, I found out why such a high end piece of equipment was at Goodwill. One of the MOSFETS took a major...

One of the major annoyances on my very first build ever, was figuring out all the tips and tricks after already mostly assembling the amp. Drilling more holes at this point would be difficult, and before continplating starting a 2nd build, I would like to get some of these tips/tricks drilled...

Hello All. Working on a Realistic STA 2100D receiver. Have an issue with the L channel amp. I rebuilt both amps and did all my adjustments. It was running smooth until today. Turned it in and R523 exploded I had to replace 2 of the output transistors and a couple of resistors. As well...

Picked up this ‘untested’ SA-706 in sort of rough shape. I’ve cleaned everything, blew it out, pots and switches cleaned with D5 and Fader, had to do it a bunch of times to eliminate scratchiness and noise...even had to use D100 on a few pots. Mostly working now, but having balance and volume...

This is my very first tube build ever. And I can't believe I did it!! I'm only 22 years old, so I'm very young and new to this Tube design thing. I have learned so mutch and now I'm addicted.... Now I can say without a doubt in my mind that my scratch built 6L6 Push Pull Stereo Tube Amplifier...

Howdy all, I've got a Soundcraftsmen separates system I've been enjoying for about a year now. Consisting of a Pro Control 3 with upgraded signal path capacitors and has had all controls completely rebuilt. A 2215rp Equalizer, and a completely rebuilt Soundcraftsmen RA6501. I'm using the Emotiva...

In terms of non-speaker infinity products, FET preamps and the tonearm are all I've ever seen before. I've seen Klaus's page on these before but never seen any listings for them or anything. I'd love to hear what Nudell and his crew cooked up for amplification back in the '70s, and if the seller...

Hello I designed the Luxman L215 amplifier pcb according to my own requirements by taking advantage of its open scheme. It works healthy. I did not use the tone control circuit. I designed it in two parts as the supply circuit and the amplifier. Bias adjust 50mA I wrote the content by...

After having recently cleaned both A & B speaker relays, the question I had was - how do I ensure B relays are in good condition over time if speakers are connected to the A terminals. - Switch speakers between A & B terminals to ensure B relays are operational and exercised? - Or if it's not...

Does anyone know why a 2 channel amp would have 4 transformers in it rather than just 2 or 1? I'm going to try and attach a screenshot I took from Bedini's webpage that shows the internals of their Dual Mono 100/100. Usually I only ever see 1 or 2 transformers in a 2 Channel amp. I have a...

I should probably (definitely?) just walk away from it but I’ve got a lead on this amp at a steep discount. The catch? The fronts don’t work and the seller has no clues (that he’ll share). I don’t need 200 wpc running to my HT surrounds, but even if I can’t get it fixed, can I run front...

Recently I picked up a "fully working" Yamaha A-560 amp for cheap and it has one small problem - it isn't fully working (gasp)... Sound coming from the left channel is distorted. What I've found out is that both output transistors of that channel were not even connected to PCB. After checking...

Hi, Have just recapped my owned-from-new NAD 3020A. Sounds good on first outing and have managed to get 0mV DC on the speaker posts. Attaching some photos. Prior to buttoning it up, please could anyone knowledgeable on the recapping of this particular amp let me know if I’ve made any obvious...