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    Craigtone's System

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    craigtone

    Posts: 10
    Join date: 2008-12-21

    Craigtone's System

    Post by craigtone on Sun Dec 21, 2008 6:18 pm

    Here is my ST-70 system ...

    Sources: Rega P2 w/DL-103, NAD C521BEE w/OPA627 op-amps & output cap bypass
    Preamps: Rotel Phono w/LM4562 op-amps & output cap bypass, Bottlehead FPIII w/upgraded caps & RCA Clear-tops
    Amp: Dynaco ST-70 w/original iron, tubes4hifi driver, RCA clear-tops and JJ KT77's
    Speakers: Klipsch RF-7's

    The ST-70 driver is the original tubes4hifi PCB. I am in the process of removing it and replacing it with the new Lo Gain version due to the 102db efficiency of my new RF-7's. I also want to use Auricaps this time. Last upgrade for this system will be a Bottlehead Seduction tube phono preamp.


    Swede52

    Posts: 4
    Join date: 2008-12-25
    Age: 62
    Location: Umea, Sweden

    Re: Craigtone's System

    Post by Swede52 on Thu Dec 25, 2008 11:40 am

    Hi Craigtone. I have an identical ST-70 setup as you do. Doesn't the amp get extremely hot having so little air above it? Dynaco-Greetings! //Swede52

    craigtone

    Posts: 10
    Join date: 2008-12-21

    Re: Craigtone's System

    Post by craigtone on Sat Dec 27, 2008 8:34 am

    Swede52 wrote:Hi Craigtone. I have an identical ST-70 setup as you do. Doesn't the amp get extremely hot having so little air above it? Dynaco-Greetings! //Swede52

    Yes, mine gets very hot as well. I have a friend that has the Triode Electronics replacement Power Transformer that has 30% more iron in the core and it runs a good 50% cooler. I figure as long as mine works I'll deal with the heat until the transformer goes bad then replace it with the Triode model.

    kost

    Posts: 32
    Join date: 2009-05-12
    Age: 50
    Location: athens

    foreplay 3 and VTA ST70

    Post by kost on Mon Dec 20, 2010 8:02 am


    Hi

    Dont you have any hum with vta and foreplay3?
    I have a lot...

    nirvana

    Posts: 1
    Join date: 2011-01-04

    Re: Craigtone's System

    Post by nirvana on Tue Jan 04, 2011 10:14 am

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    Hi Craigtone. I have an identical ST-70 setup as you do. Doesn't the amp get extremely hot having so little air above it? Dynaco-Greetings! //Swede52

    craigtone

    Posts: 10
    Join date: 2008-12-21

    Re: Craigtone's System

    Post by craigtone on Tue Jan 04, 2011 5:13 pm

    kost wrote:
    Hi

    Dont you have any hum with vta and foreplay3?
    I have a lot...

    Not really! I can turn the Foreplay ALL the way up and hear just a slight "shhh" sound. I called Paul Joppa and he said it was the electrons rushing through the vacuum thanks to my super-sensitive VTA input.

    It is probably one of the quietest tube systems of the 100's I have ever heard to be honest with you.

    Sounds like you may have a ground loop problem!

    baddog1946

    Posts: 264
    Join date: 2010-02-03
    Location: Costa Rica

    Re: Craigtone's System

    Post by baddog1946 on Fri Jan 07, 2011 3:31 pm

    Hi
    I'm using Bob's VTA ST-120 and Bottlehead Foreplay III extended preamp and 100dB Decware NFX's and it's as quiet as a stone. Same SHHH sound when I crank it but even thats a low level sound.
    I too think you may have a ground loop issue. Or maybe a cable issue.
    Baddog1946

    craigtone

    Posts: 10
    Join date: 2008-12-21

    Re: Craigtone's System

    Post by craigtone on Sat Mar 10, 2012 9:56 am

    After talking with Paul at Bottlehead and holding the phone up to the speaker for him to hear, my issue is tube rush. Seeing that I play my system at 1/20th the volume the rush is evident, I'll live with it! Cool

      Current date/time is Mon Sep 22, 2014 5:17 pm