recap

Hello, guys! I want to recap my newly (few months ago) acquired Renaissance 90. I actually did it already, but I find out that there are some tiny details like original caps ESR, that are not matching the new caps, which is expected ofc. My goal is to get the original sound when new, but I am...

Just sharing this for those who might be interested. I recently acquired a pair of KLH 23 speakers. They were in really nice condition, worked, and sounded good. So, of course, I decided to futz with them! ++TRIGGER WARNING: KLH AND/OR VINTAGE PURISTS MIGHT WANT TO SKIP THE NEXT...

From my research it seems like I'm on the right track but want to be sure before I start cutting wires, etc. The caps marked 2+2 (double cap) I'm replacing with the new yellow 2uf caps tied together as shown in bottom pic. The other cap I'm replacing with same 8uf type cap. Looks pretty...

Hello all. I’m restoring a pair of ADS l810 II’s that got on the cheap. Of course they weren’t in very good condition. I just pulled the crossovers out to have a look. As you can see in the pictures, there is what looks like powder from the sand cast resistors built up on nearby parts. Anyone...

Welp wife got the audio system in the divorce. Was a funny conversation actually: me: "So I guess I'll take the audio system, you don't need it." her: "I was hoping to keep it. I'm too spoiled now for regular audio." me: "lmfao, uh, yeah, ok. I don't have any place for it right now anyway and I...

Anyone have a recent 2230 parts list? I’m wanting to rebuild mine and any help to find the current recommended caps, transistors, diodes and other parts will be much appreciated!

I have been acquiring a few 1970s receivers and I want to recap where appropriate. What should I prioritize? My main concern is the challenge of getting into tight spaces to replace the smallest electrolytics. I’ve fried one unit and I don’t want to make the “perfect the enemy of the good” kind...

Hi, I have had this Kenwood KA-5500 for a while now, and since I have had it, it has had an issue where the left channel volume was higher than the right and after it had been running for a bit I would get scratchiness / static in both channels (Even with volume all the way down) and shortly...

Hi! I aquired a Yamaha a960-II with leaking caps, and I would need some advise on which capacitors I should use. From what I have gathered from the forum, Panasonic FC seems like a good all-round capacitor, and Nichicon UKW could be used for signal paths. Added a schematic with capacitor...

I've done a handful of crossover re-caps and hadn't had any issues with the previous ones, but after re-capping the first crossover in one of my 4002s (was waiting on the second to A/B them), I'm not getting any signal to the low frequency driver; I do get audio from the HF driver, but it sounds...

[Edit: It's the H802 transistor, but I can't edit the title of the thread] Hi, I am in the process of cleaning up and recapping a Marantz 2230 that has been in the family for over 50 years. I had a relamp kit I bought in 2020 still laying around, and decided to go all-in and do a full restore...

Hi all. I could use some advice on my latest project. I've acquired (as the 2nd owner) a really well kept Onkyo TX2500 receiver. My list of upgrades/modifications might be lengthy (as there are subjectively 'better' receivers out there), but I'd really like to refresh this unit and have it be a...

Some time ago, a friend of mine inquired about purchasing a VFET amplifier, and was veering towards a Sony TA-N7b. However due to both their expense and rarity, he decided to go with the more common and easily servicable TAN-5550 model. I've worked on a few of these at this point and know the...

Howdy all, After being down for maintenance for nearly a year, I've finally finished replacing all the electrolytic caps in my Heathkit AA-1640. I got it off Facebook Marketplace from a guy who had it sitting in his closet for a few decades, and it worked quite nicely, but better to be cautious...

I have a nice, clean, original MA5100 on the bench for a total rebuild. Crackling in right channel after a few hours. Other than that the sound is a little "thin". No noise, hum or buzzing. The controls are smooth and silent. After 55 years the capacitors have surely perished. I have seen one...

Hey all. With the graciousness earlier this week I received an A-700 in need of some love. What's in the box?! :jump: He packed it extremely well, this thing was in there like a glove. Kudos on the great packaging. I'm gonna hoard the box and material to use in the future. :biggrin: I...

This is my experience with recapping the cross-over boards on my B&W 802 Series 80 speakers. I’m the original owner of these speakers that I purchased back in 1982. All the tweeter, mid and base drivers on both speakers are still in excellent condition. However the components on the...

Gone through replacing all caps along with variable resistors on this C-4. Plugged into DBT and the good news is I've got a dim glow. The bad, some smoke came up from the function board near VR123 trimmer resistor. Looks like these 2 resistors are toast (see photo). I think both R257 ( 1.2KΩ )...

Hello! I recapped a marantz 2250 and it's looking really good. However, I'm getting some wandering bias voltage on one channel. Testing at points J710 and J708, one channel has a steady 8mA. The other channel however wonders all over the place & it creates a static over the speakers when...

I bought a sx750 recently. $100, damaged vinyl, cracked glass, damaged dial cord, bent tuning shaft, problems with balance (poor sound when set to 0, like channels mixing with one in counterphase), damaged caps, noisy phono stage, static when flipping switches. Started with gentle shower and...

Long story short (kinda) - I bought this unit in November as a faulty one. Turns on, no sound. Found out it was a blown fuse, but there's loud speaker pop when turning off. Left it as it was. Just learned to switch speakers to OFF before turning the unit off. Last week I noticed right channel...

Hi! I have been restoring vintage KLH speakers for a few months now. I found a free pair of Boston Acoustics A200s that needed some foam surrounds. Loving the Kloss sound, I thought I'd give it a try. Anyway, I replaced the surrounds. First time. It wasn't as bad as I expected. I replaced the...

Hi Folks, First of all, I want to thank you for the possibility of joining this prestigious forum. For about 15 years, I have had a Sansui AU 717 amplifier powering Bose 901 series 4 speakers. Very happy with my team but always wanting a little more definition and power for those hungry 901s...

Hey, I've just had a Marantz 1060 recapped, obviously I expect a slight sound change when that's done, but I don't think I was ready for just how much bass I seem to have lost. An old hiss is now gone, and the mid and highs seem a lot clearer, but I've also lost the tight punch and low end...

Hello to everyone, I have a problem with my SA-606 (SA-6700 version for Europe): There is an hiss similar to white noise through the headphone output. In the past I did some maintenance: 1) Recapping - used Nichicon "audio grade" KA series (light blue sleeve) for everything but main filters...