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rectifier

  1. P

    Mx110z selenium rectifier replacement

    I've recently bought a McIntosh mx110z that still has the old selenium rectifiers id like to take precautions in changing them out with silicone diodes but am inexperienced in how it should be wired with a diode bridge if anyone has an example I could follow any help would be appreciated. A few...
    • PLUTD
    • Thread
    • diode rectifier mcintosh mx110z preamp rectifier selenium rectifier
    • Replies: 31
    • Forum: McIntosh Audio
  2. vintagefeel

    Sherwood S5000 tube why is does it run so hot

    My Sherwood S-5000 tube amp runs extremely hot, can't touch protective plate without burning fingers. I tried a voltage regulator set at 110v, no luck, still burn fingers. All original tubes except rectifier which is Sovtek 5AR4. Any ideas why it is running so hot? What can I do to make it run...
    • vintagefeel
    • Thread
    • 110 120 hot rectifier s-5000 s5000 sherwood tube vintage voltage regulator
    • Replies: 13
    • Forum: Tube Audio
  3. daveinnz

    CREE rectifier bridge

    Wise people of the Forum.... I'm looking to upgrade the power supply on my Tube amp. The supply, while adequate, sags under load. The supply is a traditional transformer to SS bridge rectifier to cap / choke / cap combination. In reading some forums there is a suggestion that upgrading the...
  4. Carbsandcaps

    Some wiring confusion that needs rectifying

    I bought a rare soundscraftsmen tube receiver. Recapped it and it’s working great. The part that confuses me is the rectifying circuit. One leg of the transformer goes to 2 opposite diodes producing a dc output. The other goes through a 150mf capacitor to ground. The transformer puts out 120v ac...
  5. M

    Diode bridge substitution on 2225 P800 power supply

    I’m trying to identify modern components to replace diode bridges H801 and H802 on the power supply board (P800) of a 2225. After much searching, I can’t seem to find any information about these components’ specifications. The part numbers are: H801: HD2001508; description SS-3R H802...
  6. mteetank

    Amp Size for Bridge Rectifier – Denon DRA-300 Receiver Upgrade

    Hi all, I am doing some restoring on my Denon DRA-300. The Denon uses two capacitors in its power circuit. One is 50V 6800uF and one is 5600uF. I have two 50V 12000 uF 20% left over from a previous project. The rectifier is a Shindengen S4VB 4 amp 200volt. Now for my question/ concern. I...
    • mteetank
    • Thread
    • bridge rectifier diode rectifier rectifier
    • Replies: 2
    • Forum: DIY
  7. jpatti75

    Tube radio rectifier diode

    I’m working on a cheap little 1960 Admiral Celestial tube radio (model YH601) just for fun. It’s nothing special, but if I work out some issues, it will hang out in my garage. I replaced all the caps (electrolytic and the connecting caps), which solved the hum and the unit sounds halfway decent...
    • jpatti75
    • Thread
    • rectifier silicon diode smoking
    • Replies: 39
    • Forum: Tube Audio
  8. SwedishChef

    Rectifier Tube Concerns

    I'm a tube noob, please go easy on me for my ignorance. Rather than take my Blue Velvet preamp post way off track, I decided to start a new thread that just pertains to rectifier tubes. Here is my main question and concern at the moment, why is the 5U4G the choice of so many audio enthusiast...
  9. tea_hous

    Is this arcing?

    Hey everyone... been a long time since I've posted to AK :0. I'm here seeking some input from those who have more knowledge and experience with tubes than myself. I just purchased a Yamamoto A-08s, and one of the tubes was damaged in shipping (despite being packed very well). Its an '80'...
    • tea_hous
    • Thread
    • 80 a-08s arcing gassy purple rectifier set tubes vintage yamamoto
    • Replies: 84
    • Forum: Tube Audio
  10. tcdriver

    Do Television Damper Diode Tubes Have Any Use In Audio Equipment?

    Do Television Damper Diode Tubes Have Any Use In Audio Equipment? I imagine they could be used as low power rectifiers in a tube amp or preamp power supply. Has anyone used them for such a purpose? I would like to know. Examples: 6AX4GT 6AU4GTA 6W4G
  11. ronheadfi

    vta st 120 - no voltage on rectifier pin 2

    A week ego my vta st 120 (that fwiw was built by someone else) was working fine. It was obvious that one of the power tube was dying (crackled and was microphonic). Then it red plated and took out the bias resistor. I replaced the bad tube and the resistor. After that I had an intermittent...
  12. MartyGee666

    Directly heated rectifiers

    Heyo, I'm working with 5U4 rectifier tube, and I'm getting close to 100v AC on the rectifier heaters. With no tubes I'm getting 3.5v on the power and pre-amp tubes, but the rectifier, is way out of spec from the 5v I believe I should be getting. Is there something I'm missing, it being a...
    • MartyGee666
    • Thread
    • 5u4 directly heated heaters rectifier tube
    • Replies: 16
    • Forum: Tube Audio
  13. zastin17

    Dynaco St-70 Running On a 83 Murcury Vapor Recitifer!!

    Now why did I do this? Is it for better sound? No absolutely not. Is it because i'ts beautiful and dangerous and wacky? Yea, probably!!! I made an adapter with a socket saver and 4Pin socket just soldering through the pins. 3A filament, very close to 5U4, but far better in voltage drop. If I...
    • zastin17
    • Thread
    • 83 adapter dynaco murcury rectifier st-70
    • Replies: 49
    • Forum: Tube Audio
  14. dustmaker

    Technics SA-700 ‘smokin’ hot

    I am on a journey and I need some guidance from the experts on a very nice looking Technics receiver. It only has one known minor issue......when you turn it on its start smoking I put it on a 100watt DBT and it still smokes. There are 4 resistors on the left channel that are all burnt. Two...
  15. junkscience

    Question re: Marantz 8b high voltage power supply diodes

    Question regarding Marantz 8b high voltage power supply HV PSU diodes replacement I am restoring a Marantz 8b amplifier. It is a straight forward decision to replace the selenium rectifier. It seems that this would be the opportune time to also replace the high voltage power supply diodes...
    • junkscience
    • Thread
    • bias voltage diodes high voltage power supply marantz 8b rectifier selenium
    • Replies: 18
    • Forum: Tube Audio
  16. Moonwatcher

    Maggie 9303: The sound of silence

    To anyone familiar with these console-pull amps: My restored, recapped (not by me) Magnavox 9300 series (9303 I think) suddenly has no sound coming from either channel after five years of flawless performance. No hum. No buzz. Only silence. I know very little about how these work and have...
  17. James Cox

    Sansui 1000a rectifier value

    Hi, im working on restoring a Sansui 1000a. Ive got the parts list together except i cant figure out what value i need to getnfor the rectifier diodes. Tried searching but came up empty. Any suggestions?
  18. sbcrockett

    LK72B rectifier replacement and wiring

    Hello everyone, This is my first post. I've enjoyed reading about other LK72 and Fisher rebuilds and have learned so much from you all. I'm in the middle of re-capping a functioning LK72B that started having random buzzing issues and upon reading about the selenium rectifier and...
  19. C

    Fisher 70rt Tuner Preamp Selenium Rectifier

    I have a nicely working fisher 70rt but I’m concerned about the selenium rectifier overheating. It plays fine so don’t want to mess with it if I don’t have to. I’ve replaced a selenium rectifier in a Dumont am fm tabletop radio with great success. However looking at the diagram for the fisher -...
    • Chris J
    • Thread
    • 70rt diode fisher preamp rectifier selenuim tube
    • Replies: 17
    • Forum: Tube Audio
  20. tusntuk2

    Need help replacing KR-5600 bridge rectifier M4B-3

    Need help replacing KR-5600 bridge rectifier S5VB20. I used dlucy's suggestion of a 400v/35a bridge on a previous KA-3500 restore, but I found it larger than the original. Space is tighter in the 5600. Could I use something like a KBPC804PBF? It's 400v/8a (Vishay). I plan to use 10,000uf...
  21. H

    LEAK Stereo 50 Restore

    I have a Leak Stereo 50 on my bench and I was able to find the schematic, but I am looking for more information like the manual with the specs and possible tube substitutions. I replaced the capacitors and checked the values of the resistors and I ran the amp with a GE 5AR4 and found that the...
    • Hi-FiGuy
    • Thread
    • circuit mod leak stereo 50 rectifier upgrades
    • Replies: 3
    • Forum: Tube Audio
  22. Mike Sweeney

    LEDs running on AC

    So I was going to post this in Marantz but I know these LED replacement lamps are used else where so why not here. I know on the Marantz gear, the lamps behind the dial is around 8 volts AC. Mine actually measures at 7 volts AC. I know LEDs are intended for DC. I think I know that the LED...
  23. c.coyle

    Tube rectifier equivalent question

    These circuits are equivalent, right? Both full wave rectifiers? I could spend $10 on a drop-in solid state replacement, but I have the diodes lying around. It's an old Hallicrafters receiver. I'm crazy for putting a nickel into it, since there's nothing left worth listening to on SW, but it...
  24. Golanr

    Marantz 6300 Rectifier

    I'm recapping the power supply board on my 6300. Also replacing the Diodes and transistors. There are two diodes (looks like the rectifier) that I can't find any replacement for. They are: H801 - CO8P2N and H802 - CO8P2R Can anyone Help with suggestions? Thanks you
    • Golanr
    • Thread
    • 6300 co8p2n co8p2r diode rectifier
    • Replies: 4
    • Forum: Turntables
  25. rmunson

    Simple power supply for DIY building breadboarding prototyping

    Hey Everyone - One project that I'm working on is a simple power supply to help me understand how AC power magically gets sliced in half and smoothed out like butter. Here's where my question for the group comes in -- In some simple PS designs I see a cap coming off the diode rectifier --...
    • rmunson
    • Thread
    • filter cap power supply rectifier
    • Replies: 8
    • Forum: DIY
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