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Old 7th April 2007, 05:47 PM   #1
FTSIKIS is offline FTSIKIS  Greece
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Default e182cc

is good idea to replace 5687 with E182CC as a driver ,before two 300b in sigle ended amplifier(first tube is e801s of telefunken)?
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Old 8th April 2007, 02:44 AM   #2
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Default Re: e182cc

Originally posted by FTSIKIS
is good idea to replace 5687 with E182CC as a driver ,before two 300b in sigle ended amplifier(first tube is e801s of telefunken)?
While the E182CC and 5687 look similar so far as characteristics go, the E182CC was designed as a digital device. Here's what the spec sheet says:
The E182CC will maintain its emission capabilities after long periods of operation under cut-off conditions, but it is not intended to be used in circuits critical as to hum, microphony, or noise.

--Emphasis Added
Since it's not an audio VT, you may run into these problems. If you're gonna give it a try, you may have to pick and choose to find one that's not excessively noisey and/or microphonic.
There are no foxes in atheistholes
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Old 8th April 2007, 02:13 PM   #3
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The E182CC/7119 is very similar to the 5687 and will work in the same circuit. I've used them as an equivalent to the 5687 with good results and have not noticed any problems with noise or microphonics (though I have not tried them in very low level stages like phono amps.)

My understanding is that the 5687 is the prototype 'grandfather' of the E182CC/7119 (and its cousins like the 6S45) which have special cathodes designed to last in computer and pulse circuits where a lot of 5687's were being used. It's pretty ironic considering they are some of the most linear tubes ever made when used in analog circuits.

-- Dave
January 20, 2009: Bush's last day
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