Finish HF beam refurbishment

[Tyler-Ward]

• [ ] Clean the internals and other critical outstanding parts of existing HF beam set of parts
• [x] Determine and spec out further parts needed for the HF dipole
• [ ] Source further parts needed for the HF dipole.

[Tyler-Ward]

additional info on the beam cab be found here https://www.suws.org.uk/wiki/SUSU_Antenna_Array/HF_Yagi

[Tyler-Ward]

http://www.themetalstore.co.uk/products/aluminium-tube-16swg-1m was previously suggested as a replacemetn for Part EG

[Tyler-Ward]

@nsefan to contact US supplier and enquire about a price for replacement parts.

[Tyler-Ward]

@philcrump to measure inside diameter of old beam to ensure replacement is appropriately rated

[Tyler-Ward]

here are a few links for missing parts if we cant get them from the states

Tubes

All tubes probably 16swg

1-1/8in

2*EA @ 2m

• http://www.ebay.co.uk/itm/Aluminium-Tube-1-1-8-od-x-16swg-x-1995mm-long-/280708906952?pt=LH_DefaultDomain_3&hash=item415b8dffc8

1in

2*EC @ 2m

• http://www.ebay.co.uk/itm/Aluminium-Tube-1-25mm-dia-x-16swg-1995mm-Long-/280378740075?pt=LH_DefaultDomain_3&hash=item4147e00d6b

1/2in

1*EG @ 1m

• http://www.ebay.co.uk/itm/Aluminium-Tube-1-2-12mm-dia-x-10swg-995mm-Long-/280378687794?pt=LH_DefaultDomain_3&hash=item4147df4132

Jubilee Clips

29mm

411

• http://www.hoseshop.net/stainless-steel-jubilee-clip-6

25mm

410

• http://www.hoseshop.net/stainless-steel-jubilee-clip-5

17mm

409

• http://www.hoseshop.net/stainless-steel-jubilee-clip-2

Screws

M4 is the closest equivalent for a #8-32

• Screwfix M4*40mm (123)
• Screwfix M4 hex nut (11)
• Onecall M4 Split washer (41)

[Tyler-Ward]

This is a broken up list of the parts we need from cushcraft

Boom Parts

Potentially replaceable by a solid pole

• 1* BA -> 20-A3S-BA $42.41
• 2* BB -> 20-A3S-BB $25.90
• 2* 56 -> 050046 $0.48
• 2*413 -> 030413 $1.25
• 2*124 -> 010120 $0.10
• 2*41 -> 011941 $0.10
• 2*11 -> 010011 $0.10

Sub Total = $98.27

Element Parts

• 2*EA -> 20-A3S-EA $16.20
• 2*EC -> 20-A3S-EC $13.99
• 1*EG -> 20-A34S-EG $8.36
• 2*11 -> 010011 $0.10
• 2*41 -> 011941 $0.10
• 6*53 -> 050053 $0.23
• 6*409 -> 030409 $1
• 18*410 -> 030410 $1.25
• 8*411 -> 030411 $1.25

Sub Total = $129.02

Element Mounting Parts

• 2*33 -> 190033 $2.08
• 6*84 -> 010084 $0.10
• 6*85 -> 010085 $0.15
• 3*143 -> 190143 $2.46
• 3*402 -> 010402 $3.48

Sub Total $21.40

RF connector

• 2*11 -> 010011 $0.10
• 2*41 -> 011941 $0.10
• 2*453 -> 100453 $0.38

Sub total $1.16

Boom to mast Assembly

If we don't want to use the one we have

• 2*58 -> 195902 $1.95 (at a guess looks like it might be the part)
• 2*63 -> 195726 $1.49
• 8*118 -> 010118 $0.23
• 8*119 -> 010119 $0.12
• 2*403 -> 010403 $3.88
• 2*404 -> 010404 $3.95
• 1*919 -> 190919 $8.52
• 1*326 -> 290326 $0.3

Sub Total $34.16

(Note this ignores any savings from buying the packs of components) Total $284.01

[Tyler-Ward]

Purchasing proposal

• Purchase metal tube parts from the uk and cut/drill after delivery.
• Purchase fixings and jubilee clips from cushcraft
• use the Mounting bracket we already have.

the metal store

• 5m 1.5in 16swg Boom
• 4m 1in 16swg EC
• 1m 0.5in 16swg EG
• subtotal £73.38 inc delivery

From Ebay

• 2 * EA £25.60

£25.60 + delivery (ebay gives £10.45 as delivery but combined shipping might reduce this)

(we have also contacted the metal store to see if they can provide this part)

From Cushcraft

• 4*11 -> 010011 $0.10
• 4*41 -> 011941 $0.10
• 2*33 -> 190033 $2.08
• 6*53 -> 050053 $0.23
• 6*84 -> 010084 $0.10
• 6*85 -> 010085 $0.15
• 3*143 -> 190143 $2.46
• 3*402 -> 010402 $3.48
• 6*409 -> 030409 $1
• 18*410 -> 030410 $1.25
• 8*411 -> 030411 $1.25
• 2*453 -> 100453 $0.38

These come to $64.92 + shipping and taxes (these are coming from the US)

[Tyler-Ward]

More parts of the beam have been found and are in cage 9 these need cleaning and inspection.