[TenTec] Head-Phone volume in Orion2

[Jim Brown K9YC]

On Fri, 28 Aug 2009 06:47:01 -0700 (PDT), ac5aa1 at gmail.com wrote:

>I think it is common to the Orion & Orion II with low-Z phones. 

Most output stages used to drive headphones are really small power 
amplifiers, and have rather low impedance. For these output stages, 
the lower the impedance of headphones, the more current  they will 
draw  from the output of a headphone amplifier(and thus be louder). 
An exception is a headphone output with a high value resistor in 
series, which would limit current. 

Note that this is general statement. I haven't seen the circuitry 
for the Orion, but the guys who started Ten Tec were audio guys (and 
CW guys), and everything I've seen from Ten Tec has followed good 
audio practice. 

73,

Jim K9YC