[Hallicrafters] Off-subject / RCA Victor Am 5 radio

[William Hawkins]

Something is not properly grounded or there is an error in the lead dress.  The phono input is grounded through C6, a .1 mfd cap.  Make sure it is installed properly.
Dress all leads down to the chassis and away from audio grid and plate wiring.
Hopefully the new caps were installed in the exact positions of the old ones. This particular radio is very sensitive to component placement and lead dress.
Be sure there is no direct connection between
the shell of the phono input jack and the chassis.  It must be connected only through the .1 mfd cap for safety reasons.
Blake Hawkins
N4YCQ



On Wednesday, March 26, 2014 6:02 PM, Waldo Magnuson <magnuson at mac.com> wrote:
  
Hi, I use a RCA Victor (model 9-X-561) 5 tube All-American 5 radio to play 8-track and 45 rpm records.  All tubular and electrolytic capacitors have been changed but there is still a lot of 60 cycle hum.  The phono input area is very sensitive to stray pickup.  Is there anyone familiar with these circuits that might direct me to the cause and fix for the hum?  Thanks.
73,  Skip  W7WGM
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