Reducing A.C. Hum
y TF you use an A.C. eliminator for your "A" or "B" supply, you may be troubled with a slight hum, continually audible in the loudspeaker. This should not be prominent with a well designed eliminator, but the hum may also occur if your lighting circuit is A.G., whether you use it for supplying the receiver or not. This hum can be materially reduced,. and even sometimes eliminated altogether, by lowering the value of the detector grid leak. Values down to about } megohm should be tried. The value of the grid condenser may also be varied with success. Here the capacity may be lowered to .0001. without seriously impairing the functioning of the receiver.
Permanent link to this item
Hononga pūmau ki tēnei tūemi
https://paperspast.natlib.govt.nz/periodicals/RADREC19290927.2.78
Bibliographic details
Ngā taipitopito pukapuka
Radio Record, Volume III, Issue 11, 27 September 1929, Page 27
Word count
Tapeke kupu
117Reducing A.C. Hum Radio Record, Volume III, Issue 11, 27 September 1929, Page 27
Using this item
Te whakamahi i tēnei tūemi
See our copyright guide for information on how you may use this title.
Log in