Levinson 33H buzzing on standby

Thanks to all for the responses.

The tech was able to repro the buzzing sound just by hooking up a power cord and a speaker at his facility...so I don't think it has anything to do with my connection or equipment.

The tech called Levinson/Harmon and talked to one of two only remaining technicals from pre-Harmon days and was told that the sound is normal and not indicative of anything wrong or about to go wrong.

So now, they don't think there is a problem. Sigh...

Is it worth asking him to replace the capacitors?

Ray

IMO replace the caps..I had the same issue years ago with that amp,amoung a couple other problems..Be prepared if sending to factory to be out that amp for some time..

Missioncoonery,

Were your 33H amps made at the old or new factory. Just curious. It's too bad that the present Levinson doesn't stand behind the equipment like the former group did.

Levinson 33H amp uses phillips capacitors. Also these inferior phillips capacitors were used in 331/332/333/334/335/336.

Levinson 33H uses four filter capacitors at 60000uf at 100V and two regulator capacitors at 1900uf/150V. When these phillips caps go bad you will get buzzing,distortion and amp shutting down etc. I recommend replacing these filter caps with cornell dubilier cap at 76000uf/100V. Three inches in diameter and 5.8 inches long. For regulator caps at 1900uf/250V. 1.39 inches in diameter and 4 inches long. You will hear a huge improvement in sound. And using a higher value filter capacitor helps the cap to run cooler.

Just for the record the original Levinson 33H Filter Capcitors were made by Philips part# 3186FH603U075DPA2. 60000uf/75V.(2.5 inches in diameter and 5.6 inches long)
Cornell dubilier makes these caps at 2.5 inches in diameter. I recommend either 62000uf/75V also 68000uf/75V both very expensive since these caps are 2.5 inches in diameter.