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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment.

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Old 16th Apr 2018, 11:44 am   #21
pichacker
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Default Re: B&O radiogram model 1200RG.

I am new to B&O gear and have just had the chassis from one of these land on my bench. No FM. I thought that I'd get away with an AF11x series transistor but the fault is in the FM tuner head. Injecting 10.7 at the output shows IF to be fully functional.

Any of you chaps had success in repairing the tuner module. The voltages around the 2 BF115's look as per diagram.

Shall I start a new thread?
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Old 16th Apr 2018, 10:34 pm   #22
Michael Maurice
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Default Re: B&O radiogram model 1200RG.

Quote:
Originally Posted by Michael Maurice View Post
There should be a spring between the arm housing and the black weight adjuster.
Here is a picture of said spring and where its fitted to on the arm
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Old 16th Apr 2018, 11:36 pm   #23
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Default Re: B&O radiogram model 1200RG.

My experience of B&O FM tuners (admittedly in radios such as the Beolit 600) using BF115 transistors is that the BF115 is now quite unreliable, considering it is a metal cased four pin TO18 style (TO72) device.

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Old 17th Apr 2018, 7:39 am   #24
pichacker
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Default Re: B&O radiogram model 1200RG.

Thanks Ron. This will be my first port of call and sorry for hijacking the thread.
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