I just kind of like this picture. This is the HT-37 dial that came with the HT-37 VFO assembly I recently bought. Note the retro designation: KILOCYCLES. And note the nice, even, linear spacing of the VFO. This VFO runs 5 -5.5 MHz. The circuit is a series-tuned Clapp. That circuit seems to be one of the secrets of getting linear tuning -- to avoid the common situation of having all the upper frequencies kind of bunched together at the end of the capacitor's tuning range. I notice that this circuit was used in the Galaxy V VFO and in the VFO of the Yaesu FT-101, both notably linear in their tuning.
The Mysteries Abound ~ Project X
-
*A Partial Schematic *
*All the time you thought I was talking about Ham Fests, Slide Rules and
Parts, you likely didn't suspect I was really working o...
19 hours ago
No comments:
Post a Comment