Austin Insulators Inc. Manufacturers of RF Insulators and Transformers.

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		Austin Insulators Inc. suppliers of RF insulators and transformers since 1933

Products: Guyed Tower Base Insulator TYPES: A-3663-B A-4447-B A-3820-R Profile Dimensions		Austin Base Insulators for Guyed Radio Towers and Masts TYPES A-3663-B, A-4447-B, A-3820-R

Type	A	B	C	D	E	F	Rocking Plate	Mast Fixing (Centre Pin)	Insulator Mounting	Net Weight
A-3663-B	35" 889 mm	30" 762 mm	6.5" 165 mm dia.	18" 457 mm dia.	17" 432 mm dia.		1-3/8" (35mm) thick 12-1/4" (311mm) dia.	1-1/2" (38mm) dia. protruding 1-1/2" (38mm) above rocking plate 13" (330mm) clearance dia.	3 holes drilled 1-1/8" (29mm) on 15" (381mm) BCD	575 lb 260 kg
A-4447-B	35" 889 mm	30" 762 mm	6.5" 165 mm dia.	21" 533 mm dia.	21" 533 mm square	18" 457 mm	1-5/8" (41mm) thick 15" (381mm) dia.	1-1/2" (38mm) dia. protruding 1-1/2" (38mm) above rocking plate 16" (406mm) clearance dia.	4 holes drilled 1-3/8" (35mm) square base	925 lb 420 kg
A-3820-R	35.5" 902 mm	30" 762 mm	6.5" 165 mm dia.	27.5" 699 mm dia.	27.5" 699 mm square	24.5" 622 mm	2-1/2" (64mm) thick 20" (508mm) dia.	2" (51mm) dia. protruding 1-1/2" (38mm) above rocking plate 22" (559mm) clearance dia.	4 holes drilled 1-5/8" (41mm) square base	2450 lb 1110 kg

BCD = Bolt Circle Diameter
All Austin Insulator bases are designed for VLF, LF, and MF use, and are conservatively rated. Choose the unit that will meet your requirements for working download, working uplift, shear and RF operating voltage.
If you have a requirement which we do not seem to meet or you wish us to recommend a suitable insulator, please contact us and supply us with as much relevant information as possible.