Ruby Tubes EL34BSTR Quartet Matched

Ruby Tubes EL34BSTR Vacuum Tube Quartet Matched

EL34BSTR Quartet - Sensational new high-gain EL with dynamic tone. Extra-strong bottle, gold-plated grid.
Part # 
Weight: 0.613 lbs.  
Order Soon - Only 3 Left In StockMore Due In August 7, 2015
Your Price
Buy 6-up$79.20
Part # 072-944
Qty:  EA
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Product Details

Ruby Tubes EL34BSTR Vacuum Tube Quartet Matched
EL34BSTR Quartet- Sensational new high-gain EL with dynamic tone. Extra-strong bottle, gold-plated grid. All Ruby Tubes premium power tubes are carefully tested and matched. Matching is done by both plate current and transconductance. Each tube is marked with the plate current and transconductance for that tube and a matched pair or quartet will have tubes that have the same tested value. Ruby Tubes come with a 6-month manufacturer's warranty, one of the best in the industry. They are so careful about selecting and testing their tubes that they have no problem making this kind of an offer. If one of the premium Ruby Tubes fails during the 6-month warranty period, they will replace it at no charge.

  • Tube TypePower Tubes
  • MatchingMatched Quartet
Ruby Tubes EL34BSTR Vacuum Tube Quartet Matched
  • BrandRuby Tubes
  • Part Number072-944
  • UPC844632005480
  • Product CategoryVacuum Tubes
  • Unit of MeasureEA
  • Product Rating
    (2 Reviews)
  • Weight0.613 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Ruby Tubes EL34BSTR Vacuum Tube Quartet Matched
Ruby Tubes EL34BSTR Vacuum Tube Quartet Matched is rated 4.5 out of 5 by 2.
Rated 4 out of 5 by from Waiting to seeI would like a couple of weeks to decide what I should say about the tubes. My first impression is very good. I like the shape, the looks of the tubes. They were easy to balance and this amplifier never sounded better. These tubes are replacing another brand after a number of tube failures accompanied by sparks and smoke. My feeling is that I will be very happy with this purchase. More to come.
Date published: 2012-02-28
Rated 5 out of 5 by from Picky Jolida 302RBCHI,just wanted to say how HAPPY I am with this choice of tubes. I've used several others ( expencive name tubes ) that just would not work with this unit. up till now I was useing EH 6CA7's which worked great. BUT these are the only EL34's that I could use with this unit for more than a week B4 one went Bad!!! A great choice sound wise and a Great price ! I'll Be Back.
Date published: 2009-08-24
  • 2015-07-30T07:42CST
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Product Q&A

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Ruby Tubes EL34BSTR Vacuum Tube Quartet Matched

1-What does the designation BSTR after the EL34? 2-Where are Rubys manufactured?

Asked by: busbar
Well, it appears that the Shuguang EL34-B tube is sold by Ruby Tubes as their EL34B-STR. The -STR is Ruby Tubes own designator meaning they have been "matched" and are sold as as set of 4. But for all intents and purposes it is a standard EL34B. With an extra-strong bottle and a gold plated grid. Made in China.
Answered by: metalman
Date published: 2012-03-15
  • 2015-07-29T08:30CST
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