| HF Yagi Refurbishment | |
|---|---|
| |
| Status | In Progress |
| Project Lead | User:TylerWard |
HF Yagi Refurbishment
The clubs HF Yagi (a Cushcraft A-3S antenna) is in need of some refurbishment to put it back into a usable state. Some parts of the antenna have either corroded away or have been lost and need replacing, while others can be restored to working order.
Antenna Details
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.
Remaining tasks
- test
- Punch in trap ends to secure spacers
- add remaining trap endcaps
- Purchase required assembly tools
- Create bracket for balun box
- Stamp IDs into Traps
Parts List
From Manual
| Code | Desc | required | have | location | notes/link to buy | QC |
|---|---|---|---|---|---|---|
| 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 | QC7 |
| 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 | QC7 |
| EC | Aluminium tubing 1" x 67" (2.5 x 170.2 cm) slotted one end | 2 | 2 | long bag | marked as black 2 | QC7 |
| ED | Aluminium tubing 1" x 65" (2.5 x 165.1 cm) slotted one end | 2 | 2 | long bag | marked as red 2 | QC7 |
| 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 | QC7 |
| EF | Aluminium tubing 1" x 5-1/4" (2.5 x 13.3 cm) slotted both ends | 6 | 6 | short bag | QC7 | |
| 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) | QC7* |
| TA | 10 metre trap | 6 | 6 | short bag | these are the ones that are big on both ends (some end caps missing) | QC7** |
| TB | 15 metre 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 | 0 | ||||
| 33 | 190033 Backing plate | 2 | 0 | |||
| 41 | 011941 #8 split lock washer | 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 | QC Failed | ||
| 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 | QC7 |
| 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 aluminium pole as boom
- We have just (26th September 2016) acquired 3 approximately 15.5ft (4.72m) long 1.5in (40mm) aluminium poles which have a 1/8in (3-4mm) thickness. daveruss is currently storing these in his garage.
- varnish/paint
Shopping list
Cushcraft
| Cushcraft Code | QTY |
|---|---|
| EG | 1 |
| 11 | 4 |
| 33 | 2 |
| 41 | 4 |
| 53 | 6 |
| 84 | 6 |
| 85 | 6 |
| 123 | 2 |
| 143 | 3 |
| 326 | 1 |
| 402 | 3 |
Other
- Jubilee clips
- Ring terminals
