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FERNSEH · 14th Apr 2018, 8:52 pm

The reassembly of the Beogram 1000 record deck was completed today. Assuming the strobe on the turntable relates to 33 rpm then the speed is spot on. However, it does take some time for the motor to come up to the correct speed.
But the job is not finished. The tonearm cannot be adjusted correctly, the counter balance weight is too heavy and the stylus does not come into contact with the disc. Any ideas?
The power for the pre-amplifier comes from a winding on the motor. Two OA85 germanium diodes and two 12uF reversible electrolytic capacitors are employed in a voltage doubler circuit to supply -21 volts for the four transistors in the pre-amp.
The capacitors were found to be useless.

DFWB.

14th Apr 2018, 8:52 pm	#16
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: B&O radiogram model 1200RG. The reassembly of the Beogram 1000 record deck was completed today. Assuming the strobe on the turntable relates to 33 rpm then the speed is spot on. However, it does take some time for the motor to come up to the correct speed. But the job is not finished. The tonearm cannot be adjusted correctly, the counter balance weight is too heavy and the stylus does not come into contact with the disc. Any ideas? The power for the pre-amplifier comes from a winding on the motor. Two OA85 germanium diodes and two 12uF reversible electrolytic capacitors are employed in a voltage doubler circuit to supply -21 volts for the four transistors in the pre-amp. The capacitors were found to be useless. DFWB.