OTL Asylum

Posted by Ralph (M) on February 29, 2008 at 08:18:40

In Reply to: RE: V4, V3, V1 and V2 posted by tubevibb on February 29, 2008 at 04:36:04

>Mr.Karsten
>Thanks for you Time
>BUt CAN you SAYagin,

>So do you mean,V3 tube pin3 cathode, and pin 5 plate, need 100uf to Ground on each?

No. V3 has a cathode resistor; where that resistor goes to the power supply should be at least 100uf that is bypass for the power supply. In older amplifiers the cathode resistors of both V3 and V4 tied to the same point.

>On v4 I have always had 330uf on the plates I did not have 100uf.

Good.

>>In the production amplifiers there is a separate leg in the power supply for the cathode circuit as well- that also has a minimum of 200uf.

>Are they 100ufs in front of the 45kohms pin 3an pin6 of V4 to ground?
>thanks

If you have 330uf bypassing the plates of V4 I'd have 330uf to bypass the power supply connection of the V4 cathode resistors as well.

• RE: V4, V3, V1 and V2 - tubevibb 09:50:43 02/29/08 (5)
  In Reply to: RE: V4, V3, V1 and V2 posted by Ralph on February 29, 2008 at 08:18:40

  Yes i Have the input setup with the Caps the way you say thank you.Some say i allways do to much but it sounds better to ME!
  an if i were to set up with diodes B+anB- for V4 my Volts on V4 now,315+- Be the Same.Is Extra winding on your Xfourmer the Same after diodes,315+-
  thanks
  
  

  ---

  • RE: driver B+ - Ralph 11:28:34 02/29/08 (4)
    In Reply to: RE: V4, V3, V1 and V2 posted by tubevibb on February 29, 2008 at 09:50:43

    -runs about +315V and -315V at the rectifiers.
    
    We run a different power transformer now that has only the high voltage windings on it. Driver filaments are handled by the filament toroid. The new HV transformer also has much improved electrostatic shielding.
    
    

    ---

    • RE: driver B+ - tubevibb 06:48:21 03/03/08 (3)
      In Reply to: RE: driver B+ posted by Ralph on February 29, 2008 at 11:28:34

      Is the S30III ran off one xfourmer for the frontend,I got to hear the s30 an it sounds Sweeter than the m60s
      An i was thinking my be one Xfourmer is the Key.
      thanks
      
      

      ---

      • RE: driver B+ - Ralph 14:33:55 03/03/08 (2)
        In Reply to: RE: driver B+ posted by tubevibb on March 03, 2008 at 06:48:21

        If it was a later S-30, it may well have done better than an earlier M-60. The later M-60s are sounding better too.
        
        

        ---

        • Just one driver B+Xfourmer in S30? - tubevibb 04:39:57 03/04/08 (1)
          In Reply to: RE: driver B+ posted by Ralph on March 03, 2008 at 14:33:55

          SO the S30s All only have {One} frountend 300+ 300- Xfourmer For L an R inputs?
          thanks
          
          

          ---

          • RE: Just one driver B+Xfourmer in S30? - Ralph 08:21:25 03/04/08 (0)
            In Reply to: RE: Just one driver B+Xfourmer in S30? posted by tubevibb on March 04, 2008 at 04:39:57

            Yes. The two channels have separate legs in the power supply.
            
            

            ---

---

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ OTL Asylum ]
[ Comment ] [ Edit ] [ Delete ] [ Copyright Warning! Click for Details ]

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2008, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---