The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


    Turn on and turn off procedure

    avatar
    ImFritz

    Posts : 48
    Join date : 2017-01-01
    Age : 60
    Location : Redford, Michigan

    Turn on and turn off procedure Empty Turn on and turn off procedure

    Post by ImFritz on Wed Jan 30, 2019 5:55 pm

    Can someone confirm the turn on and turn off procedure for the preamp and the st-120 amp. Which on first and which off first.
    I've come a crossed it a few times and now that i'm looking for it I cant seem to find it.
    Thanks
    cci1492
    cci1492

    Posts : 295
    Join date : 2016-05-09
    Age : 58
    Location : Bergen County NJ

    Turn on and turn off procedure Empty Re: Turn on and turn off procedure

    Post by cci1492 on Wed Jan 30, 2019 6:31 pm

    Turn on the pre-amp first, then the power amp.
    corndog71
    corndog71

    Posts : 704
    Join date : 2013-03-19
    Location : It can get windy here

    Turn on and turn off procedure Empty Re: Turn on and turn off procedure

    Post by corndog71 on Wed Jan 30, 2019 7:52 pm

    Turn off the amps first. Then turn off the preamp.
    bluemeanies
    bluemeanies

    Posts : 273
    Join date : 2015-02-09
    Age : 69
    Location : Folsom Pa.

    Turn on and turn off procedure Empty Re: Turn on and turn off procedure

    Post by bluemeanies on Wed Jan 30, 2019 7:57 pm

    2nd
    avatar
    ImFritz

    Posts : 48
    Join date : 2017-01-01
    Age : 60
    Location : Redford, Michigan

    Turn on and turn off procedure Empty Re: Turn on and turn off procedure

    Post by ImFritz on Wed Jan 30, 2019 8:13 pm

    Thanks guys
    sKiZo
    sKiZo

    Posts : 1532
    Join date : 2013-04-01
    Location : Michigan USA

    Turn on and turn off procedure Empty Re: Turn on and turn off procedure

    Post by sKiZo on Wed Jan 30, 2019 10:42 pm

    Turn either the amp or pre-amp on or off first ... or should that be the other way around ... scratch
    pichacker
    pichacker

    Posts : 98
    Join date : 2016-08-01
    Age : 55
    Location : Near to London - UK

    Turn on and turn off procedure Empty Re: Turn on and turn off procedure

    Post by pichacker on Thu Jan 31, 2019 5:37 am

    Skizo.....

    What they are saying is ......

    Preamp ON first them Amp...
    (By doing this you're not amplifying any warm up pops or noises from the preamp and feeding them to the speakers)

    Amp OFF first then Preamp...
    (By doing this you're not amplifying any switch off pops or squeaks from the preamp and feeding them to the speakers)

    Of course if you have an attenuator on the Amp (Why if you have a preamp??) you could always turn this to minimum (Maximum attenuation) and that way it would not make much difference what order.
    avatar
    ImFritz

    Posts : 48
    Join date : 2017-01-01
    Age : 60
    Location : Redford, Michigan

    Turn on and turn off procedure Empty Re: Turn on and turn off procedure

    Post by ImFritz on Thu Jan 31, 2019 8:51 am

    pichacker,
    I do have the attenuator on the st-120. Just want to use caution. Thanks again for the explanations peps.
    Peter W.
    Peter W.

    Posts : 1369
    Join date : 2016-08-07
    Location : Melrose Park, PA

    Turn on and turn off procedure Empty Re: Turn on and turn off procedure

    Post by Peter W. on Thu Jan 31, 2019 9:23 am

    In general, tube or solid-state, with separate components:

    ON sequence:

    All attenuator/VCs at 0
    All items but the power-amp go on FIRST.
    Power Amp ON.

    Off Sequence:

    All attenuators/VCs at 0
    Power Amp OFF
    Everything else OFF

    Keeping in mind that the electronics are typically OK with anything in any sequence. The speakers might not be, and why the sequence matters.

    Sponsored content

    Turn on and turn off procedure Empty Re: Turn on and turn off procedure

    Post by Sponsored content


      Current date/time is Fri Sep 20, 2019 1:22 pm