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    tube choices

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    mattst3

    Posts : 4
    Join date : 2010-03-05
    Location : Pennsylvania

    tube choices

    Post by mattst3 on Fri Mar 05, 2010 11:42 pm

    Hi, I just registered. Wondering if anyone has an opinion on the fairly new Ruby EL34BSTR's for use in ST70's. Thanks

    Bob Latino
    Admin

    Posts : 2378
    Join date : 2008-11-26
    Location : Massachusetts

    Re: tube choices

    Post by Bob Latino on Sat Mar 06, 2010 11:50 am

    mattst3 wrote:Hi, I just registered. Wondering if anyone has an opinion on the fairly new Ruby EL34BSTR's for use in ST70's. Thanks

    Hi,

    Those Ruby EL34STR's are made by Shuguang in China and are a great value for the money. Shuguang also sells the same tube under their own name and the Valve Art name. They are the same tube and are fine sounding tubes for not a whole lot of cash. The Chinese have come a long way in the past 5 years in making tubes that are more reliable and better sounding. The Ruby GZ34 rectifier tube (also a Chinese tube) IMHO is a better and longer lasting GZ34 rectifier than either the JJ or Sovtek version of the same tube.

    Bob

    mattst3

    Posts : 4
    Join date : 2010-03-05
    Location : Pennsylvania

    Re: tube choices

    Post by mattst3 on Sat Mar 06, 2010 4:10 pm

    Thanks Bob, Do tubes like this have a "burn in time"? Do they get better after time and if so how long and what happens in that time?

    Bob Latino
    Admin

    Posts : 2378
    Join date : 2008-11-26
    Location : Massachusetts

    Re: tube choices

    Post by Bob Latino on Sat Mar 06, 2010 5:49 pm

    mattst3 wrote:Thanks Bob, Do tubes like this have a "burn in time"? Do they get better after time and if so how long and what happens in that time?

    Hi,

    All tubes seem to have a burn in time until they reach their full audio potential. I would say 100 to 200 hours of play time should do it. From what I understand, metallurgic changes occur in the filaments, plates, screens and cathodes of almost any tube so that the electrons pass in a more linear manner from their source to their destination.

    Bob

    Tube Nube

    Posts : 603
    Join date : 2008-12-06
    Age : 53
    Location : Calgary, AB

    Re: tube choices

    Post by Tube Nube on Thu Mar 11, 2010 5:31 pm

    I was looking for a the Ruby or Shugang rectifier tube on line. Several times, in fact, with not success.

    Does anyone have a source for these?

    Brenton

    Bob Latino
    Admin

    Posts : 2378
    Join date : 2008-11-26
    Location : Massachusetts

    Re: tube choices

    Post by Bob Latino on Thu Mar 11, 2010 5:51 pm

    Hi Brenton,

    Antique Electronic Supply sells the Ruby GZ34. Check the link below which goes to Antique Electronic Supply. The click on "Vacuum Tubes " and then "Ruby". The Ruby GZ34 is $11.90 + shipping.

    Antique Electronic Supply

    Bob

    Tube Nube

    Posts : 603
    Join date : 2008-12-06
    Age : 53
    Location : Calgary, AB

    Re: tube choices

    Post by Tube Nube on Sat Mar 20, 2010 7:53 pm

    Thanks Bob!

    -Brenton

    xlr8

    Posts : 68
    Join date : 2010-02-09

    Re: tube choices

    Post by xlr8 on Wed Mar 24, 2010 9:46 am

    From what I understand, metallurgic changes occur in the filaments, plates, screens and cathodes of almost any tube so that the electrons pass in a more linear manner from their source to their destination.

    Bob

    Just to add my 2 cents to what bob said, the same is true for just about any other piece of equipment in the world that runs on electricity. Most manufacturers of televisions, cameras, video recording equipment etc. put their products through at least some type of burn in process before they ever go out the door. A friend of mine used to work at a company formerly known as DVT sensor here in GA. They manufactured digital cameras for use in mechanized manufacturing processes (robots). They had a burn in station that all of their cameras were to sit in while powered up and running their software for at least 24hrs before they were allowed to leave. Believe it or not, the camera's specified resolution actually increased after this process. I was told that it was due to electrical flow smoothing out the electrons in the metal wires and chips. I guess sort of like passing one of those little magnetizers down the shaft of a screw driver and turning it into a magnet. I guess the same basic principal anyway?

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