[Ukhorse]

Rebuilt Philco 70 has some stations that come in great, but others are just a loud buzzing.
Everything recapped, resistors and tubes checked.

Totally rebuilt.

Any ideas for the buzz only on some stations ?

[Nathan Slingerland]

Are there any florescent lights nearby - or other electrical appliances (fan, heater)? Does the buzzing happen all of the time or only certain times of day?

Have you tried hooking up the ground?

[morzh]

If you do have some reception without buzz, then it is likely not the radio but interference.

[codefox1]

Lamp dimmers, computer power supplies,and anything electrically powered that was not around 40 years ago is also suspect.

[Ukhorse]

Are there any florescent lights nearby - or other electrical appliances (fan, heater)? Does the buzzing happen all of the time or only certain times of day?

Have you tried hooking up the ground?

Thought about florescents and turned them off, hooked up ground, reversed plug.  No change.  I will see if time of day affects noise and maybe get another radio to check around those freqs. 

I had rewound one of the coils but being I was good on a few stations didn't see how other parts of the band could be affected.

Thanks.

[Steve Davis]

One of the worst offenders is a motion sensing light. Also, you might try turning off all the circuit breakers in your house except the one powering the radio.

Steve

[Ukhorse]

Thanks all. Seems to have been interference.