Capacitors

jim 249
jim 249 Posts: 347
edited March 2011 in Vintage Speakers
Hi All; I have read many posts here on xover rebuilding. My 2.3TL's are about to get his upgrade. My questions are: The 5.8uf cap, I can only find 5.6uf, the 8uf cap, I can only find 8.2uf. I did not find any mention about the 750pf silver mica caps in the tweeter circuit. I am planning on using Daytons or other brands from parts express. Cost is a factor for me. Any help; Thanks! :biggrin:
Post edited by jim 249 on
· Share on FacebookShare on Twitter

Comments

  • thsmith
    thsmith Posts: 6,082
    edited March 2011
    I think you can scrap the 750pf silver mica caps.
    Speakers: SDA-1C (most all the goodies)
    Preamp: Joule Electra LA-150 MKII SE
    Amp: Wright WPA 50-50 EAT KT88s
    Analog: Marantz TT-15S1 MBS Glider SL| Wright WPP100C Amperex BB 6er5 and 7316 & WPM-100 SUT
    Digital: Mac mini 2.3GHz dual-core i5 8g RAM 1.5 TB HDD Music Server Amarra (memory play) - USB - W4S DAC 2
    Cables: Mits S3 IC and Spk cables| PS Audio PCs
    · Share on FacebookShare on Twitter
  • Schurkey
    Schurkey Posts: 2,102
    edited March 2011
    While it would be nice to have "exact value" caps, keep in mind that the originals were something like 10% tolerance to begin with.

    When replacing with 1% or 3% tolerance caps, A 5.6uf is easily within the usable range for the 5.8uf original cap, just as the 8.2uf is close enough for the 8uf.

    I used Dayton and Erse brand caps on my SDA 1Bs; Dayton 1% for the high-frequency crossover circuitboard, and Dayton 5% and Erse 3% tolerance for the low frequency board.
    · Share on FacebookShare on Twitter
  • quadzilla
    quadzilla Posts: 1,543
    edited March 2011
    You say cost is a factor, but not what your budget it. If you contact sonicraft, you can get custom value caps at no extra charge. For example, the 2 sonicap 5.8s I got for my TL conversion cost 14 each, which is about the same as a 5.6.

    Yes, you can just remove the 750 pf cap. That was there to bypass the so-so poly cap in the original network. I left it out of mine and got much better sound.
    Turntable: Empire 208
    Arm: Rega 300
    Cart: Shelter 501 III
    Phono Pre: Aural Thrills
    Digital: Pioneer DV-79ai
    Pre: Conrad Johnson ET3 SE
    Amp: Conrad Johnson Evolution 2000
    Cables: Cardas Neutral Reference
    Speakers: SDA 2.3TL, heavily modified
    · Share on FacebookShare on Twitter
  • george daniel
    george daniel Posts: 12,096
    edited March 2011
    yep-- call Sonicap,,Jeff or Elliot,,, they are great folks and they'll work with you--+1 on the 750 silver mica--de-solder and remove it,,nothing goes back in it's place.Have fun.
    JC approves....he told me so. (F-1 nut)
    · Share on FacebookShare on Twitter
  • jim 249
    jim 249 Posts: 347
    edited March 2011
    Is there enough room on the 2.3TL board after the new caps are installed to also fit a 10 ohm and a 12.5 ohm mills resistors hooked in series to replace the original 22.5 ohm resistor? Thanks for all the help so far!
    · Share on FacebookShare on Twitter
  • ben62670
    ben62670 Posts: 15,969
    edited March 2011
    A 22r will be fine.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
    · Share on FacebookShare on Twitter
  • george daniel
    george daniel Posts: 12,096
    edited March 2011
    jim 249 wrote: »
    Is there enough room on the 2.3TL board after the new caps are installed to also fit a 10 ohm and a 12.5 ohm mills resistors hooked in series to replace the original 22.5 ohm resistor? Thanks for all the help so far!

    Yes it can be done,,jerry and I did a set last year
    JC approves....he told me so. (F-1 nut)
    · Share on FacebookShare on Twitter
  • ben62670
    ben62670 Posts: 15,969
    edited March 2011
    Also you can mount the resistor on the bottom of the board.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
    · Share on FacebookShare on Twitter