Jim,
The RST-721 is a great little unit.  In addition to tuning the antennas on 
the local experimental sailplanes, I use it for my 2 meter equipment.
I didn't build one of your transceivers.  I inherited the unit from a friend 
who retired from soaring in his 80s. 
(
http://www.soaridaho.com/photogaller...k_is_Ready.jpg)
I wish aircraft tranceiver kits were still available.  I enjoy building 
electronics as much as working on my sailplane.
(
http://www.soaridaho.com/Schreder/HP-14/N990/N990.html)  I built all my 
amateur radion HF equipment. (Heathkit SB-310, SB-200, SB-101 and SB640) 
These old tube-based units are still running great.
Wayne
W7ADK
http://www.soaridaho.com/Schreder
"RST Engineering"  wrote in message 
...
 {;-)
 Jim
 I personally use the SWR in my old RST-721 test set.
 Wayne
 W7ADK
 http://www.soaridaho.com/