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DIY a Tube Preamp

202.45.83.9

Posted by Mr. Stone on March 10, 2003 at 17:51:27

Hi Folks,

Planning to build a tube preamp using LC loading and would like to seek you all the advice on the following cirucit. Any modification needed?

Proposed circuit...

Tube: 112A
B+: 140V
Grid voltage: -9V
Plate current: 6.2mA
Plate choke: 200H/10mA
Rk: 1.5K
Ck: 220uF
Rg: 100k
RL: 470K

Thanks so much!

Cheers
Derek

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