• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

substitution

  1. Geek

    Modern Replacement for A798 Dual PNP

    Hi Folks, Wish to share that I had success replacing a pesky 2SA798 in a Sansui 11000 phono stage with a BCM856BS.115 dual matched PNP from Digikey (part # 1727-5424-1-ND). It's a TSSOP-6, so you'll need an adapter, pointy iron tip and steady hands! Channel balance is great and voltages are...
    • Geek
    • Thread
    • 2sa798 a798 replacement substitution
    • Replies: 3
    • Forum: Solid State
  2. 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...
  3. K

    Marantz 1090 Power Amp Transistor Replacement

    Hello, all. I have a 1090 on the bench that had a failure in the power amp driver board. It appears Q718 shorted from the base to the emitter. The transistors in the path current flowed all seem to be effected, though Q718 is the only one with a dead short. I'm going to replace all the effected...
  4. Geek

    Successful 2SK214/2SJ77 Substitutes?

    Hi Folks, Got a McCormack DNA-500 that had a "firecracker effect" failure (POP! Bang, bang, bagitty-bang, bang from the output to input). Gonna use NJW3281/1302 on the outs for the C3281/A1302, but coming up dry on the MOSFET's. Don't trust the SOA (often not listed) for the in-production...
    • Geek
    • Thread
    • mosfet substitute substitution
    • Replies: 3
    • Forum: Solid State
  5. Ronito6

    Capacitor suggestions for polyester caps...Noob Q of the day.

    I know that they last forever as long as they are physically OK, but does anyone know what the best modern equivalents are that could replace old MKT or the old green polyester film caps? I am not certain what the newer/better versions might be. The old MKTs look like this... Here is an axial...
  6. grandpaslab

    2SA750 -> ZTX795A = hum? (Rotel RX-803 phono)

    My Rotel RX-803 had a noisy phono section, so I though I'd try swapping out some transistors, starting with the PNP input pairs. I replaced the original 2SA750's with Zetex ZTX795A's. Now I've got serious 60hz hum. I've double checked the pinout: 750's are ECB, 795's are EBC, but I've got the...
  7. Maxxarcade

    Yamaha CR-820 Transistors

    I'm working on a CR-820 that has some hiss in the right channel. Seems to be coming from the tone control board. Are there any particular transistors I should consider for substitutes? Here are the originals: 2SC1917 2SC844 2SC1213 There is also a pair of the infamous 2SC458 in the idle...
  8. kve777

    SEMIT Substitutes? My Kappa 9's need one.

    Since my Kappa 9's have a blown Semit, and trying to find one is proving impossible, I was thinking of swapping both out for a pair of Soft Dome's, like the Infinity REF-075tx car audio tweeters. I figure I could easily market the good one to pay for those(I'm not offering it, Mr. Moderator) if...
    • kve777
    • Thread
    • emit infinity kappa replacement ribbon rs semit substitution tweeter
    • Replies: 11
    • Forum: Infinity Loudspeakers
Back
Top Bottom