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Post by edoetsch on Mar 8, 2008 5:54:00 GMT -7
does anyone know if the doc tests each tube for specific abilities, or after deciding to go with sovtek 5ar4's they just get stuck in the amp?
I.e. can I simply trust a new sovtek to be the doc's prescription?
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Post by paddywhacker on Mar 8, 2008 8:54:54 GMT -7
....a nos rectifier will make a very noticeable difference....the catch is that they are expensive ....i'm sure the Doc would love to put premium NOS tubes in his amps but for availability and price....
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Post by dongiesen on Mar 8, 2008 11:06:13 GMT -7
As most have stated, the NOS can be counted on as being at or exceeding spec where as the current production are typically around 70% of spec. If the Doc went with NOS the price tag on the amps would rise considerably as per rectifier, the number of matched power tubes, and either key or all preamp tubes. The key I guess is buying from a reputable source that has put the tube through the testing paces such as GT
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Post by edoetsch on Mar 8, 2008 12:15:02 GMT -7
I realize you can spend tons of $ on great NOS tubes or buy testing equipment. I guess i'm really asking how reliable is the average sovtek?
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Post by hdahs143 on Mar 8, 2008 12:52:00 GMT -7
I quess the answer to your question is that on the whole, NOS rectifiers are more reliable than current production rectifier tubes. The current tubes are not made with the same grade of materials, and with the same quality control as NOS tubes were, and because of this, tend to fail more.
Sorry for the blanket answer, but tubes are tubes. There are no guarantees.
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Post by myles on Mar 10, 2008 9:54:14 GMT -7
You cannot test rectifiers for much more than voltage and this says nothing about reliability or how they will act an hour from now.
Take it from me .... NOS is much better in the long run as it is darn cheap considering the life of an NOS rectifier vs a new production Sovtek offering.
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