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RE: [dallasaudioclub] Finished : Heath W3M

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  • Dennis Boyle
    Hi John, Due to high audio cable order levels and Team Axiom Members pushing me to get off my butt and finish the Axiom Amplifier, I have put all my parts
    Message 1 of 5 , Apr 15, 2006
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      Hi John,

       

      Due to high audio cable order levels and Team Axiom Members pushing me to get off my butt and finish the Axiom Amplifier, I have put all my parts sales on hold. Since I am a one person business and plan to stay that way, as much as I would like to support the DIY community, I am not sure when or if I will start offering part again.

       

      The exception will be the iron and parts used in the Axiom Amplifier. You can go to http://www.chimeralabs.com/axiom_full.html click on the schematic.

       

      I also have some power and output transformers for the Ace Amplifier, that I would consider selling. That schematic can be found at http://home.att.net/~chimeraone/allianceaudioproducts.html just click on the Ace link to get to the schematic. I have put the sale of the ACE on hold, since I plan to update it to a “straight wire” direct coupled circuit similar to the Axiom.

       

      The VT-52, in my opinion one of the best sounding DHT tubes, has a plate resistance of 1600 to 1650 Ohms at the commonly used operating points. It has been my experience that you will achieve the best damping factor and lowest distortion if the tube is loaded by a transformers with an impedance 4+ times more than the tube’s Pr. In this case 6400 and higher. Testing the 300B, we found 5K to sound the best, that’s close to 6 times the Pr. I feel loading the output tube with the loads recommended by the tube manufacturer is a compromise since they felt 5% distortion was acceptable. Western Electric, on the other hand, published 2nd and 3rd order THD numbers at the various operating points and loads for their tubes.

       

      Sorry I couldn’t be more helpful,         

         

      Dennis Boyle

      Chimera Laboratories

      Website: http://www.chimeralabs.com/

      Website: http://home.att.net/~chimeraone/index.html

       

       

      -----Original Message-----
      From: dallasaudioclub@yahoogroups.com [mailto:dallasaudioclub@yahoogroups.com] On Behalf Of jlsem@...
      Sent: Saturday, April 15, 2006 9:43 AM
      To: dallasaudioclub@yahoogroups.com
      Subject: Re: [dallasaudioclub] Finished : Heath W3M

       

      Dennis,

       

      Do you still carry these items? 

       

      SET-300-5.0 - 5000 Ohm Primary - 4/16 Ohm or 2/8 Ohm Output....$385.00/OEM....$481.00/Retail
      3.13"/80mm wide X 3.69"/94mm long X 3.81"/97mm high w/wire leads - 10.28 lbs/ 4.66Kg
      Mounting Hole Dimensions = 2.50"/64mm wide X 2.44"/62mm long (use 10/32 screw)


      INT-1:0.5/0.5 -1:0.5 X 0.5 Ratio,15-30ma, Split output phase splitter..$190.00/OEM...$238.00/Retail
      2.50"/64mm wide X 3.19"/81mm long X 3.06"/78mm high w/wire leads - 6.65 lbs/ 3.02Kg
      Mounting Hole Dimensions = 2.00"/51mm wide X 2.19"/56mm long (use 10/32 screw)"

      Can the IT be used SE:SE?  I need four of each for VT-52 bi-amp project.

       

      Thanks,

      John Semrad

       

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