Tube DIY Asylum

Posted by Thorsten (A) on February 28, 2002 at 18:13:06

In Reply to: My latest phono revision unveiled posted by Kurt Strain on February 28, 2002 at 18:01:43:

Kurt,

Use either Grid or full Grid leak bias on the second valve. The 750 Ohm resistor alone is reflected up to the anode as 750 * Mu or theoretically 60k.... Bridge out (for fun) the cathode resistor on the output and use a 20M Gridleak resistor, plus a 2M7 before the coupling Cap (or just re-adjust the RIAA).

Other than that and the 417A it looks very interresting.... I almost made something similar myseld, but decided to save my shots for a fully LR/LRC equalised WE 396 & we417A phonostage, so I'm just building a little "drilled up" version of the EAR 834P.

BTW, if you drop all that cash on Teflon Cap's, do try a pair of S&B 103's for around $ 200 the pair. In my setup you have to wipe the EAR MC-3's off the wall in small chunks after a "shootout", but that just me and WTFDIK....

Ciao T

Ciao T

• Holy S*** . I screwed this up big time. - Kurt Strain 18:49:18 02/28/02 (2)
  • It's fixed now! - Kurt Strain 22:05:53 02/28/02 (1)
    • Re: It's fixed now! - Thorsten 02:29:41 03/01/02 (0)