Warning: Creating default object from empty value in /homepages/11/d132647312/htdocs/Amfone/mkportal/include/SMF/smf_out.php on line 47
Simple Audio Mods for the Johnson Ranger

The AM Forum
February 17, 2020, 08:54:57 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
Author Topic: Simple Audio Mods for the Johnson Ranger  (Read 2941 times)
0 Members and 1 Guest are viewing this topic.
Steve - K4HX

Offline Offline

Posts: 2584

« on: December 15, 2012, 11:24:45 AM »

See the attached schematic for details

Warning: Some who have performed these mods have noticed a rise in the resting modulator current, apparently due to ultrarsonic oscillation in the modulator section. If this happens to you, try replacing the 0.02 uF across the modulation transformer with a 0.001 and 0.01 uF and/or the 0.005 across the driver transformer with a 0.001 or 0.002 uF. If the condition persistists replace the original 0.02 and 0.005 uF units.

* rangermods.gif (27.52 KB, 737x600 - viewed 716 times.)
Pages: [1]   Go Up
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.031 seconds with 18 queries.