1) Heathkit VF-1: This page contains some modifications to the Heathkit VF-1 which will not change the external appearance, but will, we hope, enhance operating ease and convenience. Click here, or above to see these.
2) The Vackar VFO Circuit: This is a very short, one page, article taken from the ARRL Radio Amateur's Handbook, 1964. The Vackar VFO has much to recommend it to Glowbugs. Click here, or above to read this and print the schematic.