The Dynaco Tube Audio Forum

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


    Advice on a pre-amp

    Share

    Dave_in_Va

    Posts : 129
    Join date : 2013-04-02

    Advice on a pre-amp

    Post by Dave_in_Va on Thu Jul 18, 2013 10:02 pm

    I'm loving the sound of my VTA ST-70 amp SO much, I'm going to order a pre-amp. I have a Music Hall 5.1 turntable and a Onkyo 7030 if I want to listen to CDs. I'm deep into vinyl, though. My pre-amp is currently a Yaqin MS-12B. I'm thinking I should go with the VTA SP-10 and a PH-10 or PH-12??

    I listen to mostly late-'60's early '70's psychedelia, acid-folk, etc. Moonkyte, West Coast Pop Art Experimental Band, Village Green Kinks, new psych like the Black Angels. No jazz, no classical. Some UK folk like Gryphon.

    Advice is GREATLY appreciated!

    Thanks,
    Dave

    PS...Man...the WCPAEB are sounding GREAT as it is!

    tubes4hifi
    Admin

    Posts : 1261
    Join date : 2008-11-30

    Re: Advice on a pre-amp

    Post by tubes4hifi on Thu Jul 18, 2013 10:48 pm

    the PH10 is a better match for the SP10 power supply than the PH12

    for octal fans, I have a new board that combines the SP10 and PH12 circuits, using octal tubes and fully regulated power supply, all on one board,
    see my other post (new product announcement) about that

    Dave_in_Va

    Posts : 129
    Join date : 2013-04-02

    Re: Advice on a pre-amp

    Post by Dave_in_Va on Fri Jul 19, 2013 9:02 am

    Now I'm tempted to try the octal version. I have a small stash of 6SL7s and 6SN7s but no extra 12AX7s.

    What are the pros and cons to going with the octals?

    Thanks for all of the help.

    tubes4hifi
    Admin

    Posts : 1261
    Join date : 2008-11-30

    Re: Advice on a pre-amp

    Post by tubes4hifi on Fri Jul 19, 2013 12:56 pm

    two possible cons, neither of which is important if you like the sound of octal tubes (most people who have tried them prefer them)
    the preamp will have to be taller (about 5" instead of 4") and they use twice as much power and generate more heat.

    Dave_in_Va

    Posts : 129
    Join date : 2013-04-02

    Re: Advice on a pre-amp

    Post by Dave_in_Va on Fri Jul 19, 2013 4:56 pm

    I decided to go with the SP-10 with the PH-10.
    I'm pretty excited.

    Thanks for the help.

    WntrMute2

    Posts : 96
    Join date : 2010-11-21

    Re: Advice on a pre-amp

    Post by WntrMute2 on Sun Jul 21, 2013 1:11 pm

    Are you going to build this? Or buy it completed?

    Dave_in_Va

    Posts : 129
    Join date : 2013-04-02

    Re: Advice on a pre-amp

    Post by Dave_in_Va on Sun Jul 21, 2013 2:09 pm

    I'm getting it built and ready to go. Can't wait!
    (I've built a couple of guitar amps from kits but I wanted this to be just right and I'm not really the neatest solderer in the universe.)

    Dave_in_Va

    Posts : 129
    Join date : 2013-04-02

    Re: Advice on a pre-amp

    Post by Dave_in_Va on Fri Aug 09, 2013 10:22 am

    Got my pre-amp!!
    SP-10 with the PH-10 phono section. It sounds great with my ST-70. Great build on both pieces and my fancy new 180 gram LPs sound killer!
    The packing job on the pre-amp was so well done, I expected to find a Faberge Egg when I finally got the double boxing opened.
    I had a problem when I initially got everything set up but Troy (the builder) worked closely with me and we figured out that my "hum" was due to my ancient Variac putting out 102 volts. Reset to 120v, re-biased the EL34s....dead quiet.
    This is a really nice operation you guys have set up. Everyone is very friendly and very knowledgeable.
    Thanks!

    Sprags

    Posts : 123
    Join date : 2013-02-27

    Re: Advice on a pre-amp

    Post by Sprags on Thu Aug 15, 2013 6:05 am

    Not to hijack this thread but are you offering a kit with all the components necessary to build a preamp with this new pcb?

    tubes4hifi
    Admin

    Posts : 1261
    Join date : 2008-11-30

    Re: Advice on a pre-amp

    Post by tubes4hifi on Thu Aug 15, 2013 11:09 am

    definitely yes, see this other post and link

    http://dynacotubeaudio.forumotion.com/t1773-new-product-sp10-octal-preamp-with-phono-and-power-supply

    http://tubes4hifi.com/SP10.htm

    Dave_in_Va

    Posts : 129
    Join date : 2013-04-02

    Re: Advice on a pre-amp

    Post by Dave_in_Va on Thu Aug 15, 2013 12:18 pm

    Just for the record, I decided not to go with the octal tubes. I'm sure they sound great, though.

    Sponsored content

    Re: Advice on a pre-amp

    Post by Sponsored content Today at 11:24 am


      Current date/time is Sat Oct 01, 2016 11:24 am