[Heath] More on HW-101 VFO

[Kenneth G. Gordon]

On 6 Mar 2018 at 0:56, James Hauser wrote:

> 
> I believe that they used a BJT because it helps to correct the 
> temperature coefficient of the VFO better than a zener diode does.  
> Todays zeners may have different temperature coefficients than the 
> ones available back then.
> 
> Jim  N8UQ

Ah! Yes! You are correct. I remember reading that somewhere some time ago now. Thanks 
for the reminder.

That was in 1980 or so. Nearly 40 years ago. We would hope that modern Zeners are more 
temperature-stable.

Ken W7EKB

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus