Electronic Match Output

Number:149b

Maker:Tavernier-Gravet M. Fromy No. 29 Radio Slide Rule
PHOTO

Type:Electronic

Length:25 cm

Circular:

Special Scales in Well:N

Special Scales on Stock:Y

Gauge Marks:N

Scales Front: cm / L Cap = L(Ind) K C = λ f

Scales Back: = DE/LL T S =

Info: Gonzalo Martin Collection
A detailed article "The Tavernier-Gravet Fromy Radio Rules" by Eamonn Gormley can be found in the Slide Rule Gazette Autumn 2025