recap

Hi Team, Just purchased a Sherwood S-5500 II (7591 Tubes) and plan to restore it but have been staring at it for a week or two and not quite sure where to begin. What I have done and observed so far: - I brought the unit up very slowly without the output tubes to ensure electrolytic got...

So, a while back i had to move on my SX-1010, fully restored by our own Zebulon and nice hardwood cover. And it genuinely hurt me to be honest, so i have been keeping my eye out for another. And i found one, pretty expensive, but there ain't many of them this side of the pond for sale so i...

First off, if you want a complete restoration guide go here: http://www.classicspeakerpages.net/library/acoustic_research/original_models_1954-1974/original_models_schematicss/restoring_the_ar-3a/ There is absolutely nothing that they did not cover in that document. I bought a pair of AR3a's...

I landed a pair of Dahlquist DQ10 off CL for $250. Supposedly one driver was intermittent. The owner said banging on the side would usually bring it back. Wow like 1970's television. And they have not been serviced (or cleaned) since 1972 that I could tell. But there is a special place in...

A couple evenings ago my Harman Kardon a224 suddenly started buzzing/humming. I pulled the bottom, and found that one of the caps that I installed when I first got the amp, was leaking. Note also liquid on the tie wrap and the other end of the capacitor (right near the (-) mark). The main...

Hi AKers! I just finished my first receiver repair that involved more than just replacing bulbs. My goal was to repair the unit and replace electrolytic caps as a maintenance measure. I thought I'd post my notes and some photos. I've learned a ton from AK since being bitten by the vintage...

I bought a pair of Ohm Walsh 3 speakers about a year ago. They sounded fine but as I have learned there is always room for improvement through replacing old capacitors. But it seems Ohm makes almost every step of the recap process a challenge. I found some useful threads that got me started...

Hello everyone, This is my first thread outside of the introduction I did awhile ago. I bought this receiver about a year maybe 18 months ago. It’s been fairly reliable and had seen some service prior to my buying it but it wasn’t fully restored. About 6 months ago I had an issue with one...

Greetings all, I purchased a Sony TA-4650 VFET amplifier as a quarantine project and thought I'd start a thread to document my efforts. My Stax headphones go well with warmer, less-fatiguing amps and I left my Pioneer M-22 back in NYC, so this seemed like a good pick-up. Plus, I want to see if...

Hello AK! I'm a first-time poster, but long-time reader. I'm 20 years old and quite into vintage stereo equipment. After successfully recapping my JVC Ja-S22, my grandfather asked me to take a look at his old Pioneer receiver that he purchased back in 1970 while he was stationed in Germany...

Hey all, I have an SX-737 that I agreed to repair for a friend who says the sound, "goes in and out and fuzzy" after a while. I work in commercial audio video so thought it wouldn't be too tough of a challenge.... but after reading up on this forum I am a little overwhelmed. Where do I even...

After spiffing up a 1060 and running my mouth about it at the local record store, the owner of the shop asked if I'd be willing to recap a Marantz he'd just sold, before he sent it to the new owner. I jumped at the chance. I figured it couldn't be that much harder than the 1060, and definitely...

I recently acquired a Pioneer SA-910 integrated amp. This is the Japanese 100V version of the SA-9100. Although it sound OK when I heard it at the seller's place, I realize it has a hiss coming from both speakers at all times, a bit louder on the left channel. The hiss is there even at 0 volume...

Hi, I have a set of B&W DM 10 speakers that I got at a garage sale when I was in high school. I understand that they are budget speakers but I still like to use them sometimes. Anyway, I noticed recently that the tweeter on one side has gone very, very quiet. I pulled the crossovers to try...

Good day, I recapped some ADS L520’s for a friend, who is the original owner. Thought I’d post this as the ADS speakers have a PCB crossover that’s interesting to me. We used Clarity caps. The cheaper 18 uF PX for the larger value (original was 20), and 6.8 uF CSA for the tweeter cap. I like...

Nothing earth-shaking here but thought I'd post some pictures and notes for anyone who runs into a similar situation. I acquired a POA2200 power amp last year. The previous owner gave full disclosure that it seemed to have intermittent problems, but I couldn't make it misbehave. Actually the...

Ive seen them on Ebay, but - I hate Ebay. Is there another vendor for these? Would appreciate Any help, and thanks.

So I decided to do a recap for my Sansui SP-2000's. The story started here: https://audiokarma.org/forums/index.php?threads/need-opinions-sansui-sp-2000-replacement-woofer.899787/#post-13427340 I also have access to an impedance-frequency analyzer of sorts so I thought I would do some...

Hi all, I know there are several of us interested in what's available for these amps. I'm grouping them together since, while there are differences (Sigma Drive in the M2, which the M2A doesn't have, the Super DLD board in the M2A, which the M2 doesn't have), they're very similar amps. Goals...

Hey everyone. I just picked up a Marantz 2245 from a local vintage stereo equipment shop. He told me that he serviced it and fully tested, but after hooking it up the right channel has a very quiet hum on all inputs (I switched speakers and isolated it to the right channel) and on phono playback...

At the request of AK member @greymatter, a very nice Sansui CA-3000 was the subject of a complete restoration and upgrade. Part 1: F-2486 Equalizer (Phono) Circuit Board In the CA-3000, the phono stage consists of a pair of F-2486 boards, one for each channel. Signal Path Components The...

Hey all, I have a 4300 that I had not used in a while. I bought a repo WC43 cabinet and decided to mount it and connect it up. While going through the testing of all the functions, I found the right channel of the phono section sounds about 50% and has a static sound (like a bad transistor)...

Good morning and Happy New Year! I have two main stereo systems in my house. The large one in the living room consists of EV S15-3’s that are mint with rebuilt x-overs, and the smaller bedroom system has JBL 4406’s. I just recently purchased a never-used-in-box Hitachi HA-2 amplifier to push...

I found a sansui au-555a for sale that the seller is willing to let go for $100. He is very honest and transparent about the amp; it is in excellent cosmetic condition but has never been serviced. I've checked ebay sold listings and they have sold on average between $200-$300 (price really...

A few weeks back, I was eyeing this unit when a better deal popped for the AU-717 that ended up in my collection. This unit was still available after I finished my rebuild. I recommended to my co-worker BK (who is starting to get into HiFi and vintage equipment). Price was improved and BK...