Exhibit C

Scott's Regenerodyne

Scott sent me images of his endeavours with the Regenerodyne, and let me tell you, i am impressed. Scott has plans to redesign the Regenerodyne using a different detector arrangement and incorporating the Pullen Mixer. The Pullen actually might prove better than my own simple set-up. It is basically two triodes, often in a single envelope such as a 6N7 or 6SN7 (the 6N7 shares the same cathode), one being a cathode follower who's output feeds the cathode of the other triode, which is a mixer injected by the LO at the grid. A non linear mix occures with a sum and difference frequency generated. The first triode effectively shields the antenna from the mixer, something that mine does not. I believe Scott is also using a throttle cap reactance/regeneration control.

This is a front view of his first regenerodyne.

The front panel has more function than my versions, in that he uses front panel band switching and he is using a different vernier. I understand that this rig is actually a prototype for another which he is planning. When he gets that one completed, perhaps we can talk him into sending us images and a schematic for IT as well.

This (obviously) is an interior-anterior view.

Check out that xtal bank for some serious band-switching. I have to get back behind or inside my sets to change the band xtal, Scott is doing it the smart way!

His layout is described as follows: It is a Regenerodyne with 4 tubes and one-half circle dial faces. The tube compliment is: 1) a 6SK7 pentode detector, 2) a 6J7 Preselect-mixer, 3) a 6SN7 audio train, and 4), a 6C5 Local Oscillator. The preselect and LO is the same as in the Regenerodyne construction article on this site.

Bottom view

This below deck image shows the intense point to point work Scott put into this masterpiece. Good going, Scott!