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capacitor

  1. Med-Fi

    Marantz 4300 puff of smoke

    I've been recapping my marantz reciever one board at a time and powering on between each change I make. Yesterday I recapped the power supply, and replaced both switching relays. everything powered up perfectly. Today I replaced both main filter caps. Powered it on and I heard a sizzle, pop...
    • Med-Fi
    • Thread
    • 4300 capacitor caps filter marantz marantz 4300
    • Replies: 38
    • Forum: Marantz Audio
  2. Kreshna

    [NHT SuperZero crossover mod] can you use 5.1uF capacitor instead of 5uF?

    Found an interesting crossover modding suggestion for NHT SuperZero: I suggested all of the owner to modify this speaker:- 1.change the wire with another good quality wire,i use TARA LAB 8N multi strand(crossover to treble & bass speakers, solid core 8N copper wire(from input to crossover)...
    • Kreshna
    • Thread
    • 5uf capacitor crossover mod nht superzero solen
    • Replies: 18
    • Forum: DIY
  3. L

    NAD 3020 power on noise/hum

    How difficult is replacing the C533 & C531(47uf 50v) capacitors? Thx
  4. 1

    New tubester in over my head? Magnavox 175-67

    Hi, Been getting into this whole tube thing after I picking up a 1962ish RCA with a 6bq5 PP amp. I had the amp and tuner gone through and recapped by an electronics trade school student who did some really nice work for me. That stereo is my family daily driver and my kids love playing records...
    • 1962 RCA
    • Thread
    • 175-67 capacitor multi multi-section
    • Replies: 16
    • Forum: Tube Audio
  5. M

    Rek O Kut JR L-34 capacitor

    I am trying to figure out what capacitor I need to replace this one on my Rek O Kut JR L-34 turntable. It is for the switch between 33 and 45 rpm. This may not be the right forum but any help would be appreciated.
  6. M

    Adcom GFP345

    Hi everyone a friend of mine has a problem with his ADCOM GFP-345. He got those high pitched signal tone about 5700 hz from time to time from his GFP345 in both speakers. It disappears and come back again and again. When the music plays loud then he does not hear these signals but sometimes the...
    • Marantz22xx
    • Thread
    • capacitor high pitch noise preamp noise schematic service manual
    • Replies: 16
    • Forum: Solid State
  7. J

    Marshall JCM800 Lead Series Repair - Power Issues

    This JCM 800 landed on my bench had cutout issues as reported and was apparently blowing out fuses. This sounded strange, but since it was blowing out fuses, this is going to have to be put into service position and troubleshoot with the power-off. This will start with a visual inspection. The...
    • JRUBIN
    • Thread
    • capacitor jcm 800 lead series marshall repair
    • Replies: 2
    • Forum: Tube Audio
  8. B

    KLH Model Six

    Hello, I have been lurking on this site for a while. Recently bought a cheap pair of KLH model six speakers from Craigslist. As expected, the tweeters are not working, so I am going to put in new capacitors. I have read many threads on here, but all of the old ones look different than mine...
    • Bad Andy
    • Thread
    • capacitor klh six resistor vintage
    • Replies: 15
    • Forum: Speakers
  9. D

    Speakerlab Crossover Help

    I have Speakerlab .1's, 1's, 2's 2.5's and 7's that I want to recap and make them sing as they did in the 70's. Finding information on line has been disappointing. Does anyone have accurate capacitor information for each, and a procurement source for these crossover capacitors. Thanks.
    • DJ Jim
    • Thread
    • capacitor crossover one point one sevens speakerlab two two point five
    • Replies: 5
    • Forum: Speakers
  10. foo.kamikaze

    a/d/s ( aDs ) L570 Crossover Capacitor Repair/Restore/Upgrade

    Hi. I recently purchased a pair of a/d/s L570 bookshelf speakers on Minneapolis Craigslist. The two were in okay shape. They have signs of normal use over 30 plus years, but no abuse. Unfortunately, about their surrounds is rust that is contributing to the surrounds lifting off the metal...
    • foo.kamikaze
    • Thread
    • a/d/s ads capacitor crossovers l570 speakers
    • Replies: 30
    • Forum: Speakers
  11. Sam08861

    Anyone have a recommended capacitor list for the Technics 9070?

    Just got one of these, but has the original electrolytic caps. I have the service manual and can see which are electrolytics and of these, which are non polar. 1. What I don't know how to figure out here is if any should be low leakage/low esr caps. Any suggestions which ones or what to look...
    • Sam08861
    • Thread
    • capacitor preamplifier su-9070 technics
    • Replies: 3
    • Forum: Solid State
  12. B

    Bell Sound 2418 - bringing it back.... Advice?

    I was asked to take a look at a Bell Sound 2418 integrated amp to see what it would take to get it back into service. A little background -- over the past 30 years I've taken care of the care and feeding of a Dynaco ST70 and PAS3X. Also brought 2 other ST70's and PAS's and a SCA35 back, but...
  13. NicholasD

    What could be causing a Mains (50Hz) Hum in Right Channel only of my AKAI AM-35 Amplifier?

    Strong 50Hz (mains) Hum with Harmonics coming from Right Channel Only by NicholasD posted Jul 20, 2018 at 12:53 PM So I have this old(ish) AKAI AM-35 AMP that I am quite fond of & there is a solid 50Hz HUM coming from the Right Channel of it. This occurs with no inputs connected. So...
    • NicholasD
    • Thread
    • akai am-35 amplifer capacitor hum in right channel mains hum noise trouble right channel solder
    • Replies: 20
    • Forum: Solid State
  14. Mike Sweeney

    2230 Update

    Oh the joys of a restoration ;) So I finally had some time to put into the 2230 of mine. I could not get the stereo lights ( 2) to work. I had pulled the bulbs which were toast and replaced them with some LEDs I gotten off eBay as a package deal. The LEDs were warm white and worked fine on the...
  15. DangerBoy

    Nice inexpensive experiment, great results

    At my cabin I have a Panasonic SA-PMX9 micro stereo system that is a few years old. These systems were fairly good and fairly well reviewed at the time they came out (https://www.whathifi.com/panasonic/sc-pmx9db/review). I was never all that satisfied with the speakers though. They were a bit...
    • DangerBoy
    • Thread
    • capacitor capacitor upgrade mod modification psb image 2b upgrade
    • Replies: 7
    • Forum: Speakers
  16. JayPare

    BIC Venturi Formula 4 recap and restoration

    I'm looking to give a second life to a pair of BIC Venturi Formula 4 that I got in a bundle with a TT and 2 stereos receiver. I read on some forums (including this one) that the first thing to do with those is to recap the crossover. Therefore, I'm wonder which on I need to replace. I'm...
    • JayPare
    • Thread
    • bic bic venturi formula 4 capacitor crossover crossover capacitor tweeter
    • Replies: 100
    • Forum: Speakers
  17. scootsity5

    Sansui 5000x static

    I'm pretty sure I know what the usual suspects are here, but I figure it's better to ask than to assume, particularly with a group as knowledgeable as AK. I've got a Sansui 5000x that's been my daily driver for years. It's always had a fair amount of static on both channels on any input. The...
    • scootsity5
    • Thread
    • capacitor noise sansui 5000x service static
    • Replies: 11
    • Forum: Solid State
  18. redpackman

    AR 3a Crossover - What difference would 180uf vs 150uf make?

    I'm in the process of restoring a nice pair of AR-3a's. This is the second set I've done and they're really turning out nice. I sent away for some new caps for the crossover. The crossover requires a 6 uf, 50 uf and 150 uf cap. The supplier sent all six and before I put them in I tested them...
    • redpackman
    • Thread
    • ar ar 3a capacitor crossover crossover capacitor
    • Replies: 8
    • Forum: Speakers
  19. Walter R

    HF-20 Power Supply Problem

    My two HF-20s that I just dusted off after 15 years operated great for 10 hours continuous. Then one of them went mute. Tube pin voltage checks (I have pin test adapters) indicated that there was no plate voltage to V1 and V2, both 12AX7s. The other tubes had plate voltage, but it was about...
  20. M

    DQ-10 80 uF cap soldering trouble

    I recently got a pair of Dahlquist DQ-10s that hadn't been used in decades and decided to do a bit of refurbishing. I refoamed the subwoofers without trouble. Next, I was told to replace the blue 80 uF electrolytic cap (to the subwoofer) in the crossover. Got two 80 uF 100 V matching caps and...
    • mitch755
    • Thread
    • capacitor dahlquist dq 10 dq-10 dq10 replace solder soldering
    • Replies: 6
    • Forum: Speakers
  21. MusicRobb

    SX-737 Not working after recap

    So I recently got a non-working SX-737 from a friend. When he had it it was working okay but, when warmed up, it would occasionally pop and the audio would and cut out for a bit. I guess he figured a recap was in order so he went ahead and did some work on AWH-033, AWR-057, and AWF-011...
  22. MusicRobb

    Trying to find amplifier filter capacitors for a Sansui 5050

    I'm having a really hard time finding the right amplifier filter capacitors for my Sansui 5050. They are 63v 6800uf. If anybody has an idea of where to look I would very much appreciate it!
  23. BuzzRd

    Fake Solen capacitors on eBay - buyers beware!

    Hi all, Just wanted to give a heads-up to whomever it may concern - i just purchased a few Solen 400v Polypropylene capacitors from a Hong Kong eBay seller (https://www.ebay.com/usr/idea*for*life?ul_noapp=true) for a crossover project. when i received them i noticed that the inscription "Made in...
    • BuzzRd
    • Thread
    • beware buyer capacitor caps counterfeit crossover fake solen
    • Replies: 11
    • Forum: DIY
  24. JMiP

    Upgrade capacitor in Boston Acoustics HD5

    I have a pair of Boston Acoustics HD5 bookshelf speakers that I am using as a guinea pig of sorts. I refoamed the woofer over the weekend and much to my surprise, it worked. Hooray! And now, just for the heck of it, I want to upgrade the capacitor in the crossover. Refer to the photo attached to...
    • JMiP
    • Thread
    • capacitor speakers upgrade
    • Replies: 4
    • Forum: DIY
  25. D

    Output coupling capacitors receivers and amplifiers from Germany

    Hello. I searched the net but I can't find any information about this subject. I know about Japanese products but how about products from Germany? Have the old Saba, Grundig, Telefunken, Wega , Dual, Basf, Nordmende, Uher, ITT, Braun, Revox, or other vintage manufactures output coupling...
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