ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
I have a ground problem with my Beogram 8002.
I kind of, sort of had a bit of an issue previously when I grounded both my Beogram 8000 and Beogram 8002 to the same ground terminal on the pre-amp box, but I solved this by separating the two grounds, and grounding the Beogram 8002 to the bottom of my Beomaster 4500.
Well now I have a VERY bad hum which improves, let’s say 50% when connected to my new pre-amp box. The only thing that makes the hum go completely away is when I have the ground connection to the pre-amp box AND I hold the box in my hands.
My previous trick of grounding the Beogram 8002 to the Beomaster 4500 does nothing this time around.
Any ideas?
Jeff
Beogram 4000, Beogram 4002, Beogram 4004, Beogram 8000, Beogram 8002, Beogram 1602. Beogram 4500 CD player, B&O CDX player, Beocord 4500, Beocord 5000 T4716, Beocord 5000 T4716, Beocord 5000 T4716, Beocord 8004, Beocord 9000, Beomaster 1000, Beomaster 1600, Beomaster 2400.2, Beomaster 2400.2, Beomaster 4400, Beomaster 4500, Beolab 5000, Beomaster 5000, BeoCenter 9000. BeoSound Century, S-45.2, S-45.2, S-75, S-75, M-75, M-100, MC 120.2 speakers; B&O Illuminated Sign (with crown & red logo). B&O grey & black Illuminated Sign, B&O black Plexiglas dealer sign, B&O ash tray, B&O (Orrefors) dealer award vase, B&O Beotime Clock. Navy blue B&O baseball cap, B&O T-shirt X2, B&O black ball point pen, B&O Retail Management Binder
I tried everything, shaking the ground cable, massaging the ground cable from one end to the other, pulling like mad at the point the cable enters the plastic housing that connects to the Beogram and everything I did made minute changes, but nothing I did made the hum go away, except holding the preamp in my hands.
Then I got the bright idea to swap B&O cables as I have another 8000 series Beogram. Nada, absolutely no change, but at least I learned it is NOT the cable/ground wire.
Then I decided to try the ground on my original preamp and like magic, the hum went away.
What temporally swapping amps could possibly have to do with a brand-new pre-amp failure; I don’t know, but there is no arguing that changing the preamp box fixed the problem. I went so far as to turn the Beomaster 4500 up to 85 and at that level there is just the slightest HINT of a hum.
I am too skitterish to announce I fixed the problem, but it would appear I have.