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Equipment/BBC AF signal generator: Difference between revisions
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Equipment/BBC AF signal generator (view source)
Revision as of 22:41, 13 October 2011
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This belongs to Russ. You can use it but Russ will be grumpy if it gets damaged. | This belongs to Russ. You can use it but Russ will be grumpy if it gets damaged. | ||
Quickstart | |||
== History == | |||
This unit was made sometime around 1989 and looks like it was built from modules from the RS catalogue. Russ purchased it from an auction of old BBC equipment. | |||
== Quickstart == | |||
To produce an audio tone: | To produce an audio tone: | ||
Connect a small loudspeaker to the binding posts at rear | Connect a small loudspeaker to the binding posts at rear | ||
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'''Amplifier fuses''' | '''Amplifier fuses''' | ||
One 20mm 2amp T for each of the + 45v and -45v rails of the amplifier supply | One 20mm 2amp T for each of the + 45v and -45v rails of the amplifier supply | ||
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== Operating Notes | == Operating Notes == | ||
The frequency control feels very loose, this is normal and does not mean that anything is broken.... | |||
(More notes to follow when the precise Modus Operandi has been established) | |||
The 100-100K range seems most usefull, other ranges seem to be mostly below what little loudspeakers can produce. | |||
[[File:BBC_AF_signal_generator_rear.jpg|thumb|siggen rear panel]] | |||
== Log. == | |||
Please add any observations or repairs here... | |||
June 2011. Someone reported it not working, supposedly one of the fuses on the back was blown and blew again when replaced. | June 2011. Someone reported it not working, supposedly one of the fuses on the back was blown and blew again when replaced. | ||
The two fuses on the right hand of the rear panel supply +45volts and -45volts to the amplifier module. The +ve fuse was ok and is a 2amp T fuse. A 250mA fastblow fuse had been fitted in the other holder. Seems fine with a 2amp T fuse. | The two fuses on the right hand of the rear panel supply +45volts and -45volts to the amplifier module. The +ve fuse was ok and is a 2amp T fuse. A 250mA fastblow fuse had been fitted in the other holder. Seems fine with a 2amp T fuse. | ||
