Bang and Olufsen,
Beolit 1000
|
|
According to
the label, still attached, I bought this from the local Red Cross
charity shop for £1.50. At first (and second) glance I'll
need a circuit diagram and some mechanical data to sort it out
because the last owner tried unsuccessfully to get it working
when it went wrong. I always knew B & O equipment was difficult
to repair, probably that's why, with TV sets, they usually supplied
the circuit diagram wedged in between the tube and the case.
The underside has the markings TR1000
T1401.
Bang & Olufsen,
were founded in 1925 by two young Danish engineers, Peter Bang
and Svend Olufsen and all their products that have passed through
my hands were a bit special and downright expensive. Their mechanical
design was usually badly thought out (my opinion) although the
actual performance was usually first class... somewhat reminiscent
of Roberts radios whose construction was absolutely awful although
they worked really well. |
|
Above... what the set should look
like. Besides the layer of corrosion on my example there lurks
a really nasty problem.. the tuning knob for the AM bands is
missing, together with the internal pulleys and whatever was
required to tune the condenser top left in the picture below.
The last "repairer" has substituted for the complicated
drive cord arrangement, a tube wedged onto the condenser drive
spindle. The tube passes through the cover where it may once
have carried a knob. I suppose this allowed the set to be tuned,
but without its original fine tuning speed. Bearing in mind the
extremely high value of this receiver the last owner was a little
remiss in his actions... putting it mildly! |
|
Below you can see the
main circuit board. Bottom left is the audio output transformer. |
|
|
Here are some technical
details of the Beolit 1000 extracted from the User Manual.
The set uses a variety of transistor
types viz. AD162, BC149B, BC154, BF166, BF194, BF195 and maybe
some MPS6518 or 2N4058 in place of type BC154. The diodes used
are type AA119 or OA90 and type BA138 varactor diodes.. |