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181: Difference between revisions
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thereby achieving 2 parts per million | thereby achieving 2 parts per million | ||
frequency stability in a 24 hour period, the same stability as the [[180A]]. | frequency stability in a 24 hour period, the same stability as the [[180A]]. | ||
A 181 with the OCXO mod is a "181 S1". | |||
Internally, the 181 is similar to the [[180A|180]]. | Internally, the 181 is similar to the [[180A|180]]. | ||