HF Yagi Refurbishment

The HF Yagi is believed to be a Cushcraft A-3S.

This is a 20m, 15m ,10m yagi.

It was acquired as it was being thrown out by a Scout Club near Basingstoke, prior to the departure of their only licensed staff member.

Cushcraft Product Page

A-3S Assembly Manual (pdf)

Parts List

From Manual

Code	Desc	required	have	location	notes/link to buy
BA	Aluminium tubing 1-5/8" x 12" (4.1 x 30.5 cm) drilled and slotted both ends	1	0		replace with solid boom
BB	Aluminium tubing 1-1/2" x 84" (3.8 x 213.4 cm) drilled one end	2	0		replace with solid boom
EA	Aluminium tubing 1-1/8" x 72" (2.9 x 182.9 cm) drilled for U-bolt, slotted both ends.	2	2	long bag	slightly bent marked as blue 3 and black 3
EB	Aluminium tubing 1-1/8" x 36" (2.9 x 91.4 cm) drilled one end, slotted both ends	2	2	long bag	marked as red 3
EC	Aluminium tubing 1" x 67" (2.5 x 170.2 cm) slotted one end	2	2	long bag	marked as black 2
ED	Aluminium tubing 1" x 65" (2.5 x 165.1 cm) slotted one end	2	2	long bag	marked as red 2
EE	Aluminium tubing 1" x 46-1/2" (2.5 x 188.1 cm) slotted one end	2	2	long bag	marked as Blue 2
EF	Aluminium tubing 1" x 5-1/4" (2.5 x 13.3 cm) slotted both ends	6	6	short bag
EG	Aluminium tubing 1/2" x 35-7/8" ( 1.3 x 91.1 cm)	6	5	short bag	end elements (marked as red 1, blue 1 and black 1) (one damaged needs replacing)
TA	10 meter trap	6	6	short bag	these are the ones that are big on both ends (some end caps missing)
TB	15 meter director trap	2	2	short bag	mixed with TC's needs sorting (some end caps missing)
TC	15 meter driv. & refl. trap	4	4	short bag	mixed with TB's needs sorting (some end caps missing)
11	010011 #8-32 hex nut	6 4	0
33	190033 Backing plate	2	0
41	011941 #8 split lock washer	6 4	0
46	050046 1-1/2" (3.8 cm) black plastic cap	2	0		do we want to cap the new boom
53	050053 1/2" (1.3 cm) black plastic cap	6	2
58	173658 3-1/2" (8.9 cm) V-block	2			Used on boom to mast assembly (alternate assembly will be used)
63	170063 2" (5.1 cm) V-block	2			Used on boom to mast assembly (alternate assembly will be used)
84	010084 1/4" (.6 cm) lock washer	6	0
85	010085 1/4" (.6 cm) hex nut	6	0
96	122096 10" (25.4 cm) fibreglass insulator	1	1	long bag	marked as red 3
118	010118 5/16" (.8 cm) hex nut	8			Used on boom to mast assembly (alternate assembly will be used)
119	010119 5/16" (.8 cm) lock washer	8			Used on boom to mast assembly (alternate assembly will be used)
120	010120 #8-32 x 2" (5.1 cm) machine screw	2			used on boom not required
123	010123 #8-32 x 1-1/2" (3.8 cm) machine screw	2	0
143	190143 1-1/8" (2.9 cm) aluminium bracket	3	0
326	290326 Danger label	1	0
402	010402 1-1/2" x 3-3/4" (3.8 x 9.6 cm) U-bolt	3	0
403	010403 1-5/8" (4.1 cm) U-bolt	2			Used on boom to mast assembly (alternate assembly will be used)
404	010404 2-1/8" x 3" (5.4 x 7.6 cm)	2			Used on boom to mast assembly (alternate assembly will be used)
409	030409 11/16" (1.7 cm) worm clamp	6	0		all jubilee clips should be replaced
410	030410 1" (2.5 cm) worm clamp	18	0		all jubilee clips should be replaced
411	030411 1-1/8" (2.9 cm) worm clamp	8	0		all jubilee clips should be replaced
413	030413 1-5/8" (4.1 cm) worm clamp	2	0		used on boom not required
453	100453 Terminal	2	0		check balun fittings before ordering
919	190919 6" x 6" (15.2 x 15.2cm) mounting plate	1			Used on boom to mast assembly (alternate assembly will be used)

Additional/Alternate Parts

• Balaun
• 1.5in 14ft aliminum pole as boom
• varnish/paint

Reference Photos

Old Boom

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