11-24-2018, 10:08 AM
Try checking the rivets to the tube shield bases, make sure the tube shield is making good contact with the base, and the base has good contact with the chassis.
Also, I have a 45C I worked on some time ago, and it had a loud hum 1st time I powered it up. It turned out the common wire to the electrolytic filter caps on the ground side had a break in it. It was a solid wire, and the break was inside the insulation, so it wasn't visible.
As soon as I replaced it with a new wire, I was up and running.
Also, I have a 45C I worked on some time ago, and it had a loud hum 1st time I powered it up. It turned out the common wire to the electrolytic filter caps on the ground side had a break in it. It was a solid wire, and the break was inside the insulation, so it wasn't visible.
As soon as I replaced it with a new wire, I was up and running.
Blessings,
Jeff W.
Jonesboro, Arkansas
http://jeffsradios.weebly.com
God loves you as you are, not as you should be, because none of us are as we should be. - Brennan Manning
