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The SF-1 is a well-built precision instrument. All that is required to ensure proper
operation of this microphone is to follow some commonsense rules.
1. Avoid transducer damage by not exposing the microphone to severe shock or vibration.
If the microphone is accidentally dropped, test it to see if damage has occurred before
returning it to service.
2. Do not expose the microphone to direct blasts of air. Use a windscreen or suitable blast
filter when close miking a vocalist or certain types of wind instruments. P-popping does
not necessarily damage the ribbon element but may produce unacceptable preamplifier
overload and could cause damage to speaker systems.
3. Do not expose microphone to liquids or caustic smoke.
4. Do not expose the microphone to strong alternating electromagnetic fields, i.e. the
power transformers in amps, or a hum may result.
5. Use a soft cloth to clean the microphone body. A small amount of denatured alcohol
can be used to remove fingerprints and other stains.
6. Keep metal filings away from the microphone at all times.
7. When not in use, store the microphone in its protective wooden case.
8. Leave disassembly of the microphone to a trained technician. There are no user-
serviceable parts inside.
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The ribbon-velocity microphone design first gained popularity in the early 1930s and
remained the industry standard for many years. Their characteristic sound signature can
still be appreciated today in recordings of the 30s, 40s, 50s and early 60s.
Ribbon microphone development reached its pinnacle during this time. Though they were
popular with announcers, one of the disadvantages of ribbon microphones was their
immense size. Even though these devices were considered state-of-the-art, magnetic
structures of the time were bulky and inefficient. Transformers suffered a similar
deficiency. When television gained popularity in the late 1940s, it was obvious that their
size was intrusive and objectionable. They were difficult to maneuver and broadcasters
soon looked for a suitable replacement. Even though these microphones performed very
well, their days were numbered. Newer dynamic and condenser mics would soon replace
