Chameleon Antenna CHA TACYAGI-70 new GRIP MODULE

Chameleon Antenna CHA TACYAGI-70 new GRIP MODULE

https://chameleonantenna.com/collections/yagi/products/tacyagi-70

I was not happy with the grip that came with it. Decided to modify my radio gear. I have about 120 hours into this grip design so far including print times and engineering time. Why you might ask? I am involved with a group that does SAR (Search and Rescue). We utilize RDF (Radio Directional Finding) equipment to help locate downed aircraft and lost persons. This yagi is perfect for UHF frequencies and fits in my pack. Durability and light weight are a must when searching a hill side or mountainous ravine. The old saying goes ounces = pounds and pounds = pain.

NOTE - Version-7  (OBSOLETE-removed from files) designed part is too tight for the boom. This is my first print on this.  This part is 109 grams.

Version-8 uploaded. Everything looks good geometry wise. Added a bolt retainer lanyard spot. Kevlar Kite cord (2.1mm) will fit thru the bolt retainer lanyard spot and finish off with a stopper knot (figure-8). The plastic melt inserts that fit in either end, now a full thru hole. Should lighten up the part. This part is 85 grams. 

Version-9 (internal revision) (OBSOLETE)

Version-10 has all of Version-8 good stuff, but also a couple of slots for Velcro to go thru the handle to secure the coax (It will also be lighter and stronger).  I will leave Version-8 up on the site, so if people want to print only that one they can. This part is 75 grams. I think this handle is engineered to the best I can do at this point. 3 bottom layers, 3 top layers, and verticals are 3 layers thick. 15% Gyroid infill. 

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So if you want to print this here is the list of parts you need to print.

Choose the grip style you want and print - Qnty-1

Ver-8 (Solid infill on handle, and no Velcro strap slots, but has lanyard tether spot.)
Filename - DF_70cm_yagi_grip_v8_PCTG.3mf

or
Ver-10 (Hollow handle with internal handle supports-PITA (Pain in the ASS), has Velcro strap slots, and has lanyard tether spot.
Filename - DF_70cm_yagi_grip_v10_PCTG.3mf

or
Ver-10 (Hollow handle with NO internal handle supports (recommended handle print version), has Velcro strap slots, and has lanyard tether spot.
Filename - DF_70cm_yagi_grip_v10_PCTG_No_INT_Handle_Support.3m

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Print the boom insert - Qnty-1

Filename - DF_70cm_yagi_boom_insert_v10_3_PCTG.3mf

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Print the boom insert dowel pins - Qnty-1 (2 in set)

Filename - DF_70cm_yagi_dowel_pin_v10_PCTG.3mf

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Print the top knob - Qnty-1

Filename - DF_70cm_yagi_top_knob_v10_PCTG.3mf

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Print the bottom knob - Qnty-1

Filename - DF_70cm_yagi_bottom_knob_v10_PCTG.3mf

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Choose the end cap style you want and print - Qnty-1 (2 in set)

Filename - DF_70cm_yagi_end_cap_v10_PCTG.3mf

or
Filename - DF_70cm_yagi_end_cap_rounded_v10_PCTG.3mf

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Here is the additional hardware you will need to purchase as built above.

Gel Super Glue. - https://a.co/d/0PupriZ

Green Kevlar Kite cord (2.1mm) - https://a.co/d/c2dnBQF

Used figure-8 stopper knot to hold in place (see pic below).

Additional screw and ¼-20 threaded insert will be listed below.

Additional parts obtained thru McMaster Carr.

https://www.mcmaster.com/

SS ¼-20 threaded insert.

Part # 94459A717

Heat-Set Inserts for Plastic, 18-8 Stainless Steel, Flanged, 1/4"-20 Thread Size, 1/2" Installed Length

https://www.mcmaster.com/94459A717

New screw design for part - SS ¼-20 x 15/16” Flanged Socket Cap Screw.

Part # 98201A311

Exact-Grip-Length Flanged Socket Head Screw, 1/4"-20 Thread Size, 15/16" Long

https://www.mcmaster.com/98201A311

Gyroid infill is probably the strongest/lightest trade off for durability. Can‘t guarantee any other infill will work as good. When printed in a Horizontal orientation 5 layers on the bottom, 5 layers on top, and 3 layers on vertical walls. 15% Gyroid infill.

Version-10 (with bolt retainer lanyard & Velcro) part is 75 grams. (picture below)

Version-10 (with bolt retainer lanyard & Velcro) part is 75 grams. Hollowed out handle picture. (PRUSA SLICER picture below)

Version-8 (with bolt retainer lanyard). (picture below)

Actual printed Version-10 (with bolt retainer lanyard & Velcro) part is 75 grams. (picture below)

Version-10 Boom End Cap. Part is 4 grams.

Version-10 Boom End Cap in place. Each end cap part is 2 grams.

All material printed for this project was done using 3D Fuel Pro PCTG.  Olive Green.
https://www.3dfuel.com/collections/1-75mm-pro-pctg/products/pro-pctg-olive-green-1-75mm

 All printable parts were designed in Plasticity. It is a very nice 3D CAD design software. 
 https://www.plasticity.xyz

I still design in inches, even if it is metric. That is just the old school machinist in me.