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I like these caps !

Discussion in 'd.i.y.' started by istari_knight, Apr 15, 2013.

  1. istari_knight

    istari_knight pfm Member

    [​IMG]

    I'm talking about Panasonic "for audio" AM series [blue/silver] available from Farnell at very reasonable prices compared to the likes of Silmic's etc... This is the first time I've used them, they are in the output stage & phono preamp. Seem pretty good IMO.

    Anyone else tried them ? Theres very little opinion on the net about them which is odd as the FC/FM series are well regarded - Maybe Panasonic messed up pricing them too low for audiophile street cred :confused:

    http://www.farnell.com/datasheets/319799.pdf

    Bonus point if you can tell me what the amplifier is ;):cool:

    [​IMG]
     
  2. John_73

    John_73 pfm Member

    Looks very similar to an Arcam Alpha 3 I once owned! Is it an Arcam?

    Thanks for the heads up on those caps - I'll give them a try for my P3A amp project.

    John
     
  3. darrylfunk

    darrylfunk Banned

    creek? or arcam like mr quad said...
     
  4. jimmytwos

    jimmytwos pfm Member

    looks like an arcam alpha
     
  5. misterc6

    misterc6 Wasted and wounded, it ain’t what the moon did

    Arcam Delta, maybe a Delta 60?
     
  6. istari_knight

    istari_knight pfm Member

    Nailed it! A real bargain on the s/h market IMO... Fully recapped & OPA604's on order it already sounds like a completely different amplifier [a better one! :D]

    The most shocking thing was the original Jamicon 10000uf caps measured 151uf on my meter & the 100uf Philips pre-reg caps measured 62uf but all the Rubycons were within 5%
     
  7. misterc6

    misterc6 Wasted and wounded, it ain’t what the moon did

    ...sssh, don't tell everyone!

    Malcolm

    psst! It's even worth buying faulty ones because the H & F transformer is almost always OK.
     
  8. PigletsDad

    PigletsDad My intelligence test came back negative.

    Not tried, but I notice that there are some nice compact polypropylene types also made by Panasonic.

    So a 250V 2.2uF part fits with 15mm lead spacing, and costs £1.09.

    Farnell have them for example.
     
  9. istari_knight

    istari_knight pfm Member

    Indeed, The secondaries are quite a useful voltage! ;)

    This one came with a faulty relay [cost all of £5 to replace.] I'll certainly be keeping an eye out for more.
     
  10. Dan K

    Dan K pfm Member

    What are those fuses for? Get rid of them...Ughhhhh.

    Seriously though, try bypassing them with some decent hook up wire and see how it sounds then.
     
  11. sq225917

    sq225917 Bit of this, bit of that

    They'll be so you don't fry the coils in your speakers....
     
  12. istari_knight

    istari_knight pfm Member

    LOL. Thats alright thanks I don't mind fuses. Its electrolytics in the signal path that need removing.
     
  13. 337alant

    337alant Negatively Biased

    I think fuses in the signal path sound worse than electrolytic caps:rolleyes: get rid I say if you need speaker protection fit a vellaman kit to the output.

    Alan
     
  14. istari_knight

    istari_knight pfm Member

    Seriously ?! In a laboratory grade amplifier maybe... Anyway, the fuses are staying.
     
  15. Artioneer

    Artioneer tripath walker

    Another excellent/informative thread.

    Does anyone know where to buy suitable OPA opamps ?

    [​IMG]


     
  16. Bemused

    Bemused What's this all about then?

    Wondering why the caps sit so high off the board and thinking of the inductance.
    What would it be around 10nH per cap.
     
  17. john.luckins

    john.luckins pfm Member

    That could be to ensure HF stability given the completely unspecified 100kHz ESR of these caps in the linked datasheet. (It is specified on the FC and FM series)
     
  18. istari_knight

    istari_knight pfm Member

    [​IMG]

    Thats how every original cap was fitted so thats how the replacements went in...
     
  19. S-Man

    S-Man Kinkless Tetrode Admirer

    Indeed, especially if you go for the 63V and 100V ones. Fine for coupling as well as decoupling, as long as they are polarised.
     
  20. S-Man

    S-Man Kinkless Tetrode Admirer

    By that logic - put a cap across the fuse!
     

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