+ Reply to Thread
Page 1 of 4 123 ... LastLast
Results 1 to 10 of 32

Thread: What Amp fuse do you have in the plugs of your kit ?

  1. #1
    Join Date: Apr 2011

    Location: London

    Posts: 2,561
    I'm Robert.

    Default What Amp fuse do you have in the plugs of your kit ?

    Some say 13 amp is too much ?

  2. #2
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 3,498
    I'm Alan.

    Default

    Tuner, CD player, DAC, TT, I use 3A.

    Power amp 13A, though there is usually a smaller value fuse on the back panel

  3. #3
    Join Date: Aug 2009

    Location: Staffordshire, England

    Posts: 16,827
    I'm Martin.

    Default

    13 amp in everything (except the power amp lead, as that came with the power amp so I've no idea). I don't actually think it matters as far as the sound goes.
    Martin



    Current Lash Up:

    Technics SL1200 with Sumiko h/s & Nagaoka MP50 * Firebottle valve MM phono stage * Parasound CDPi1000 * NVA P90SA passive pre / Krell KSA50S Power amp * JM Lab Electra 926 loudspeakers *



    "I hate to advocate drugs, alcohol, violence, or insanity to anyone, but they've always worked for me." - Hunter S Thompson

  4. #4
    Join Date: May 2012

    Location: Toulouse

    Posts: 3,697
    I'm GettingFunky.

    Default

    Fuses in plugs? A quaint concept....
    Kevin

    Funkified Technics SL1200 Mk2 (Funk FX-1200+, Hana SL/AT33PTG/II/, Funk Firm "Strata" platter, "Spin" bearing and BO!NG Isolation feet, MCRU/LDA PSU). Pioneer PD-S703. Caiman II. Firebottle KIN. Firebottle Monoblocks, Graham Slee Solo Ultra Linear Headphone amp. Electric Beach FH3 with Taket BatPure super tweeters. Sennheiser HD540 Reference II & HD650. DIY Klotz MC5000/MS Audio interconnects. Talk cable 3 speaker cable. Power Inspired AG1500

  5. #5
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 3,498
    I'm Alan.

    Default

    Ha ....isn't it just

  6. #6
    Join Date: Nov 2010

    Location: Yorkshire

    Posts: 6,539
    I'm AnDreW.

    Default

    Go schucko
    SS CD Teac VRDS25X(Mega Modded) DAC Caiman SEG+Anker PSU DECK 1210 Mat Analouge Studio Crystal Mods MN Base/Bearing/Platter+Ebony arm Board Feet Isonoe PSU Paul Hynes SR7EHD-27XL/DCSXL Ag DC lead/Jaeger(low-impedance) connector/3 StageRegs/Recapped PCB+No Pitch/Strobe/Light ARM SME V(Kondo Ag Rewire&Tags) MCOrtofon Cadenza Black CABLES Arm Yannis SPD-4 IC Yannis 222 Litz+Ag bullets Power WAR PRE ATC SCA2 SPEAKERS ATC 50ASL STANDS Atacama PHONO Sugden Masterclass PA4 SUT Ortofon ST80SE POWER PSAudio P10

    Valve PRECroft Epoch(Mega Modded) AMP Sondex S100 SPEAKERS Tannoy 15"MG+RFC Warwick cabs+ Reference XO DECK Garrard301 MatTeunto GunMetal Bearing401 PlinthMoldovan Arm SME 3012(Ikeda Ag wired) PSUPheonix PSU+Tachomter MCAg Meister SPU/DECCA Maroon CABLESArm Yannis 420.5 Litz+ Speaker3mm2Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostage4Box Paradise


  7. #7
    Join Date: Mar 2017

    Location: Seaford UK

    Posts: 225
    I'm Dennis.

    Default

    The general rule safety wise is to use the lowest value that is usable without blowing, this offering maximum equipment protection. The resistance will be insignificantly different whatever the value, and the contact resistance similar.

    Roughly, look at the maximum power consumed, calculate the current for that power, and add say 10% to that for fuse current value. I'd rather risk fuse changes than serious equipment damage.

  8. #8
    Join Date: Mar 2008

    Location: Dunfermline, Scotland, UK

    Posts: 12,158
    I'm inthescottishmafia.

    Default

    You can work out what is required using the formula P=I*V, where P is power or Watts, I is amps and V is Volts. You know the mains voltage is 240, and most kit will tell you on the back what the required wattage is, so if Watts= Amps times Volts, then Amps= Watts divided by Volts. This will give you the current draw of the piece of kit and hence the required ampreage of the fuse.
    There are times when you canít do the sensible thing, when you canít act like a responsible adult at all; you just have to do whatever insane thing comes into your head. When bad people do it they end up murderers, when good people do it they end up heroes, and when the rest of us do it we end up looking like total idiots. But whenís that ever stopped us?

  9. #9
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 33,822
    I'm Grant.

    Default

    nice explanation Ali of the piv triangle.
    Regards,
    Grant ....
    Sometimes incompetence is useful. It helps you keep an open mind.
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    IMUTO TAURUS X4 BATTERY SUPPLY. - RPI2B & AUDIOPHONICS DAC running MOODE 3.7- TONBRUX BATTERY SUPPLY & CHROMECAST2 AUDIO DONGLE no1 - JBE SERIES 3 SLATEDECK & EMOTIVA XPS-1 PHONO - DENON DV2900 - TWIN PRO MONOBLOCK AMPLIFIERS. - XIANG SHENG DAC\PRE\HEADPHONE AMP. -AUDIO TECHNICA ATH-MSR7 & OPPO PM-3 PLANAR HEADPHONES - WIN10 JRIVER22, SPOTIFY PREMIUM- KINPS CABLES, SMSL M6 MINIDAC, CHROMECAST2 AUDIO DONGLE no2 POWERED BY ANKER BATTERY PSU - FULL RANGE TWIN & SINGLE TELEFUNKEN's - Q ACOUSTIC BT3 actives - CANTON SUB - TANDBERG TCD310 CASS - CARTS.. ACD xlm mk1 integra, AT95 Shibata, SHURE M55E original, JVC MD1029. - RCA CABLES BY BRIAN SPKR CABLES BY MOI HAIR BY MARCO FEET BY ELECTRICBEACH - MAINS REGENERATED BY POWERINSPIRED AND FILTERED BY BELKIN PUREAV.

  10. #10
    Join Date: Jan 2009

    Location: Essex

    Posts: 15,445
    I'm openingabottleofwine.

    Default

    Quote Originally Posted by Firebottle View Post
    Tuner, CD player, DAC, TT, I use 3A.

    Power amp 13A, though there is usually a smaller value fuse on the back panel
    Agreed, it's what I use.

    Quote Originally Posted by Pharos
    The general rule safety wise is to use the lowest value that is usable without blowing, this offering maximum equipment protection. The resistance will be insignificantly different whatever the value, and the contact resistance similar.
    Also agree.

    Apropos the additional series impedance imposed by a 3A fuse, it is easily calculated.

    BS1362 cartridge fuses are 1" long, and for a 3A rated fuse contain a copper wire 0.15mm in diameter. The series resistance is thus 0.025 Ω.

    At 50Hz, the skin depth in copper is 9.33mm, so since the wire has a radius of 0.075mm, the current density in the wire is uniform over the cross section of the wire. The inductance is thus μ0/8π = 5.10-8 Hm-1, or 1.27nH. At 50Hz the inductive reactance will be 0.4μΩ.

    Thus the series impedance at 50Hz is 0.025 + j4.10-7Ω. This to be compared with the typical source impedance of the UK mains supply at the wall socket of 0.25 + j0.23 Ω (IEC 725:1981 assumes 0.4 + j0.25Ω, so the UK mains supply is a little better in this regard).

    Of course with current surges the effective frequency will momentarily be much higher, but even at 1000Hz, the series impedance of the fuse will still be small relative to the source impedance.

    Therefore the series impedance of a 3A BS1362 fuse is normally less than one tenth of the mains source impedance, and thus should have absolutely no audible consequences; though some might dispute that.
    Have you listened to this month's choice in the Album Club?

    Barry

+ Reply to Thread
Page 1 of 4 123 ... LastLast



 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •