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Re: Inductor or TI? (1660 or 1667?)

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danzan

(A)

In Reply to: Re: Inductor or TI? (1660 or 1667?) posted by KevinC on October 23, 2002 at 04:38:05:

Thank you Kevin.
What's the inductance value of the custom 1660/20 or 25 (compared to the 100H of the 1668/30)? And what would be about the inductance value of a custom 1667/25 ?
You know, an anode inductor with a free interstage transformer capability (or viceversa) sounds very attractive to me...
Cheers

Follow Ups:

Re: Inductor or TI? (1660 or 1667?) - KevinC 07:23:58 11/07/02 (3)
Without transformers to measure I could not easily answer, so I consulted Per Lundahl. Here is his answer:
primary inductance of about 65H
(Inductance is inversely proportional to DC current gapping.
LL1667/25mA would have a inductance of about 160H>
Possibly a significant difference depending on what you are doing.
Kevin
- Re: Inductor or TI? (1660 or 1667?) - danzan 09:10:07 11/18/02 (1)
  Sorry, but I got back to this kind answer of yours and I had a flash...
  Was 65H referred to 1660/20 or to 1660/25?
  As a load for a 10Y (Rp 5000 Ohm ish) 65H are just almost enough, I think...
  Thank you a lot once more
  - Re: Inductor or TI? (1660 or 1667?) - KevinC 09:21:54 11/18/02 (0)
    The 65H number is for the LL1660/20mA. The 25mA version would have somewhat lower, but not drastically so, inductance.
    Kevin
- Thank you - danzan 03:36:41 11/08/02 (0)
  Very helpful
  1660/25 with a 65H Prim. Inductance means, with the 10Y, a Fc(-3dB) of 12Hz ish
  Fear enough!
  Cheers

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