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
It is in a sorry state......non the less connected up the variac and, multimeter in series, applied some power. Was quite happy with the load as it came up to full 240vac
Hooked up a couple of speakers and my Ipad to the phono input set on HIGH and powered up once more......life from both speakers
The stereo lamp has failed and as I joggled the front switches I did get the hum and crackle intermittently and the right side channel output was a fair bit lower than the left....so I balanced them up using the pots underneath until they both matched, looks like the machine is more or less functional, had a look inside.
Forty or so years of accumulated dead skin and insect carcasses as you would expect, no signs of previous entry...though the envelope and circuit diagram are missing.
Corrosion has begun around the transformer housing and the power supply smoothing capacitor and output capacitors look very tired
To be fair my Beolab 5000 was in a much worse state...this needs a good clean out
Its certainly worth saving, switches cleaning capacitors changing out and sliders lubricating.....the full hogg including new anodized panels from Frede will be expensive....Alistair, your call
Alistair: I recommend changing the front panels, I had one of my Beolab/BM 5000 playing here for a couple of month before I got the new fronts, and every time I looked at them it irritated me, also if the sliders are yellowed get new ones, it is purely optical but in my opinion worth it. Craig love your work.
Collecting Vintage B&O is not a hobby, its a lifestyle.
Cheers Soren....
Transformer out first...make a little room to work in
needs a good clean and a coat of paint
Down to the bare metal....as usual
Coat of primer...
Big cans can be taken out a lot easier with the transformer removed..one has leaked of course
Actually measured up more or less still in spec +/- 20% ish
This is a view one normally doesn't see...….
And I now know why I couldn't find the envelope when I took the top cover off....was looking in the wrong place, its an age thing!
Some hamerite and some wire brushing......
seeing this even worries me ;¬)
This conductive grease does a good job....but I always end up with graphite everywhere
Silicone grease for the guide rods
The serious clean up complete its finally time to start re assembly...….
Big cans installed with modified bracket.....
And the transformer assembly...…..
Powered up again using the variac and she's pulling 224mA...…..that will do.
Idle current on both channels is coming in at 4.5mV.....so it appears she has survived being pulled apart and reassembled.