kt120 tube for vh4??

[diezelduder]

seriously wondering if anyone knows what settings for biasing this tube should be set at, and i guess it may be important to know if it's even possible with the vh4 thanks very much for any help,

info taken from site,

Tung-Sol KT120

"This is the most powerful audio power tube in production today. With a plate dissipation rating of 60W (compare that with the 35W of the 6550, the 42W of the KT88, and the 50W of the KT90), a pair of these KT120 tubes in push-pull configuration can deliver 150 watts or more of audio power. And when used in a vintage circuit designed for 6550 or KT88, the KT120 will deliver unbelievable amounts of clean headroom, low end rumble and dynamic punch all without overloading. The glass of this tube is a full 1/2" taller with the internal plate structure 3/8" longer than its nearest KT88 cousin. The internal control grid cooling fins are twice as large as the KT88 adding to the amazing performance of this tube. This particular tube draws between 100mA (.1A) and 300mA (.3A) more filament current than a standard KT88, so check with your amp manufacturer to insure you have the additional filament headroom to power these tubes. This new KT120 is the steamroller of audio tubes, prepare to be flattened.
Price is for a Matched Pair"


bye now?

 

[PaulyPanacea]

thats one big ass tube....let the games begin

 

[diezelduder]

thats one big ass tube....let the games begin

dat's what i'm saying man!

 

[RJF]

Geeze, there is so much headroom to be had from the bigger KT88's and 6550's, so I can't really see a reason for these 120's.

In a herbert, in theory you'd have a 360W amp.

 

[Anonymous]

The extra power is a good thing IF it can be used.
My experience has been that in a concert environment, everyone is mic'd and the stage volume does not need to be loud. In a non-mic'd environment, no one needs to be as loud as the VH4 or Herbert can be anyway regardless of the fun it would be to play that loud.
Why would someone need a tube of that much power output, especially in a VH4 or a Herbert?!

I could see it used better in a Schmidt. jmho

 

[MARK2C]

To bias a Herbert or VH4 it would be 94mA for 75% Max Plate Dissipation. Somehow, I don't think Papa will think this is a good
idea to use these in Diezel's.

 

[PaulyPanacea]

To bias a Herbert or VH4 it would be 94mA for 75% Max Plate Dissipation. Somehow, I don't think Papa will think this is a good
idea to use these in Diezel's.

..thats what i was thinking too.

 

[diezelduder]

To bias a Herbert or VH4 it would be 94mA for 75% Max Plate Dissipation. Somehow, I don't think Papa will think this is a good
idea to use these in Diezel's.

..thats what i was thinking too.

apparently it can be done but peter thinks it won't sound good,

ahh well,

 

[Peter Diezel]

If You bias one tube over 40 mA the amp gets to hot

 

[diezelduder]

If You bias one tube over 40 mA the amp gets to hot

sorry i misquoted you in the above, thank you very much for your help and time,

will probably go ahead with kt88 or the sed 6550 don't know?

thanks though