Sunday, October 8, 2017

Assembly is complete

Looks finished doesn't it?  As the last 3 photos show, it is not finish.  All of the elements have been mounted.  My effort will slow down a bit now.  I hope to complete the wiring and testing by the end of the year.The 12AX7 on the left side of the chassis is the only planned preamp tube at this point.  Phase inverter is in the middle near the bias adjustment potentiometer.  The open tube socket near the phase inverter is an auxiliary, just in case I can't get proper gain from the single preamp tube.  Only recently did I learn that I don't have four 1614 tubes, but two with the other two being steel-cased 6L6.  Rectification is by bridge as you can see.  On the left of the rear chassis, is an octal socket (with pig tail inserted).  This was in the chassis when I pulled it from the Conn organ, and I decided to leave it in to be used as HV read points.  I wound up with two different capacitor holders.  The silver colored one is preferred but I haven't found a second one yet.  Brian can you help?  So what is the funny bulb near the front of the chassis, you ask?  That is something I've been working on for a while.  I've named it the "hydrophonic ambivalator".  The specifics of its function are secret, but I will say that it enhances the sound of the amp by adding to the ambiance.  I added a mix of turret boards and solder points since the entire preamp hasn't been worked out yet.