NOS Tubes Stronger?

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glynnw

NOS Tubes Stronger?
« on: 14 Oct 2016, 01:59 am »
For the past 2 years I have been using a Shindo Montille 6V6 amp and it is a sweetie, putting out 12 or 15 watts, depending on what you read.  It came with United Electron 6V6GT tubes.  Since I have no idea how old the tubes are, I started questioning if new tubes might sound better.  After a lot of research and talking to 2 Shindo dealers, I found I could not simply order a set of NOS tubes from Shindo. One of the dealers recommended a type of NOS he felt was the best of all, but the quad I found was about $400, which is out of my range at this time - I have spent way too much on gear in the past couple of months. I looked around and settled on a matched quad of Tung-Sol tubes for $80.  Out of the box they sounded a bit strident, so I pulled all the silver interconnects and put in copper, which helped a bit.  Finally I decided to test everything on my old, simple Knight tester.  All it tests is for shorts and the dial says bad or good, higher scores presumably being "gooder".  The Tungsols all tested at about 70 on the meter, the United Electrons about 90.  One of the UE tubes was a bit weaker, but I had 1 NOS UE 6V6GT that tested the same as the best of the used tubes.  So now I am using the 4 best United Electron tubes, which all had similar "gooder' scores.  I did replace the 2 6AW8 tubes with new ones which had higher scores.  I put the new Tung-Sol 6v6 tubes in storage as backup in an emergency.  Now the little sweetie is singing sweeter than ever. Is it common for old tubes to be stronger as mine are?

JoshK

Re: NOS Tubes Stronger?
« Reply #1 on: 14 Oct 2016, 03:36 am »
6V6 amps and EL84 amps rule!  I had heard good things about new production Tung-Sols, but hadn't compared them.  Mine tested pretty strong on my calibrated Hickok 752A, but so did the old stock ones I had in a magnavox pull amp.   So in the end, I can't help you.   I think within PP tube amps, 6v6 (or EL84) pp amps are the ultimate sweet spot in terms of cost/performance/linearity.   Some of the more powerful tube amps require too much effort (cost or SQ robbing) to make them as good, or they require too much boutique parts to make them work well. 

glynnw

Re: NOS Tubes Stronger?
« Reply #2 on: 14 Oct 2016, 03:50 am »
FYI, my other am is EL84.  What a great tube.

G Georgopoulos

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Re: NOS Tubes Stronger?
« Reply #3 on: 14 Oct 2016, 05:18 am »
6V6 amps and EL84 amps rule!  I had heard good things about new production Tung-Sols, but hadn't compared them.  Mine tested pretty strong on my calibrated Hickok 752A, but so did the old stock ones I had in a magnavox pull amp.   So in the end, I can't help you.   I think within PP tube amps, 6v6 (or EL84) pp amps are the ultimate sweet spot in terms of cost/performance/linearity.   Some of the more powerful tube amps require too much effort (cost or SQ robbing) to make them as good, or they require too much boutique parts to make them work well.

+1 ,very nice tube, :thumb:

G Georgopoulos

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Re: NOS Tubes Stronger?
« Reply #4 on: 17 Oct 2016, 12:40 am »
el84 is the smaller brother of el34
half the heater current
half the signal drive

low watt champion  :green: