Electronic Match Output

Number:4c

Maker:Alro Philips Telecommunication Decibel
PHOTO

Type:Electronic

Length: ⌀ 6 cm

Circular:Y

Special Scales in Well:N

Special Scales on Stock:Y

Gauge Marks:N

Scales Front:N² N = dB

Scales Back:L/C N² N = N ν λ

Info: David Rance Collection