Dynaco 70 parts list needed

faster100
faster100 Posts: 6,124
edited August 2004 in Electronics
I looked them up online, and in the manual... i just don't get the values and whats what.. I can solder them in anyways.. I just need to know what and where to get like the orange drop coupleing caps for the driver board, and what value to get.. I don't understand, MFD, UF, all those numbers... i know 400volts or higher, seen a bunch on e-bay but what can you use? also any other caps that are easily replaced... Filter can cap on top// so on... Ive done the research but its all chinese if you dont know what they mean...
MY HT RIG:
Sherwood p-965
Sherwood sd871 dvd
Rotel 1075 amp x5
LSI15 mains
LsiC center
LSIfx surround backs
Lsi7 side surrounds
SVS pb12/plus2

2 Channel Rig:

nad 1020 Pre-amp
Rotel 1080 stereo amp
Polk sda 2B
kenwood grunt Tuner
realistic lab 450 TT
Signal cable IC
Post edited by faster100 on
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  • faster100
    faster100 Posts: 6,124
    edited August 2004
    anybody??
    MY HT RIG:
    Sherwood p-965
    Sherwood sd871 dvd
    Rotel 1075 amp x5
    LSI15 mains
    LsiC center
    LSIfx surround backs
    Lsi7 side surrounds
    SVS pb12/plus2

    2 Channel Rig:

    nad 1020 Pre-amp
    Rotel 1080 stereo amp
    Polk sda 2B
    kenwood grunt Tuner
    realistic lab 450 TT
    Signal cable IC
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  • par-man
    par-man Posts: 14
    edited August 2004
    Is this what you are looking for??

    http://www.welbornelabs.com/st70.htm
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  • faster100
    faster100 Posts: 6,124
    edited August 2004
    No, thanks though... Im looking for the values of the coupleing caps on the driver board of the st70
    MY HT RIG:
    Sherwood p-965
    Sherwood sd871 dvd
    Rotel 1075 amp x5
    LSI15 mains
    LsiC center
    LSIfx surround backs
    Lsi7 side surrounds
    SVS pb12/plus2

    2 Channel Rig:

    nad 1020 Pre-amp
    Rotel 1080 stereo amp
    Polk sda 2B
    kenwood grunt Tuner
    realistic lab 450 TT
    Signal cable IC
    · Share on FacebookShare on Twitter
  • par-man
    par-man Posts: 14
    edited August 2004
    My bad - I must've misread.
    I was glancing at the parts list - is this coupling cap listed there?
    If so which one is it? Perhaps I can help with the values??
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  • organ
    organ Posts: 4,969
    edited August 2004
    Hey Faster,
    I replaced my coupling caps with orange drops from thetubestore.com Here are the ones I used... http://www.thetubestore.com/ca-or-047uf-600v.html and http://www.thetubestore.com/ca-or-100uf-600v.html You're going to need two of each. They have no polarity so installing them should be a breeze. I haven't upgraded any resistors yet but here's a list of stuff for the driver board. It's a pdf file and you can find it on page 8. http://www.dynaco-doctor.com/ST7-PC3R-DOC.pdf DON'T remove those 'domino' looking caps. I hear they never go bad and you can't buy them anymore. While you're at the shop, pick up four 100 ohm (1/2 watt) resistors and convert your Dyna to triode output. Output power is reduced by half but the sound is much better. Takes about 20 minutes to change it from pentode to triode.

    Maurice
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  • faster100
    faster100 Posts: 6,124
    edited August 2004
    Thanks for the info Maurice, as usual a big help... will check the links out shortly...
    MY HT RIG:
    Sherwood p-965
    Sherwood sd871 dvd
    Rotel 1075 amp x5
    LSI15 mains
    LsiC center
    LSIfx surround backs
    Lsi7 side surrounds
    SVS pb12/plus2

    2 Channel Rig:

    nad 1020 Pre-amp
    Rotel 1080 stereo amp
    Polk sda 2B
    kenwood grunt Tuner
    realistic lab 450 TT
    Signal cable IC
    · Share on FacebookShare on Twitter
  • organ
    organ Posts: 4,969
    edited August 2004
    No problem:). Take your time when working on the driver board. Don't heat things up too long because when the tracing comes off the board, they're not going back. Also, make sure you leave a tiny bit of space underneath the caps and resistors so they get some air flow. While you're at it, use a solder sucker to remove old solder joints and re-solder with fresh solder. You should do this to the 7199 tube sockets as well. Remove them and solder them back on.

    Maurice
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