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Author Topic: NCX-5 Part  (Read 966 times)
W4OP
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Posts: 421


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« on: February 21, 2013, 10:35:21 AM »

Long shot- but I am looking  for the antibacklash spur gear on the main tuning cap of the VFO.
Tnx,
Dale W4OP
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W9GB
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Posts: 2622




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« Reply #1 on: February 21, 2013, 03:16:05 PM »

Dale --

I wonder if National used a New England spur gear mfg. (now in North Carolina) and
it was an "off-shelf" size (in catalog)?

Boston Gear - Spur Gear catalog
http://engr.bd.psu.edu/rxm61/MET210/CourseSupplements/Manufacturers%20Data/Boston_Gear_-_Spur_Gears.pdf

Spur Gear : Engineering Data - Boston Gear
http://www.bostongear.com/litportal/pdfs/P-1482BG_pg133-153.pdf

Boston Gear Headquarters
701 Carrier Dr.
Charlotte, NC 28216 - USA
Phone: 704-588-5610
FAX:  704-588-7181
http://www.bostongear.com/

Customer Service:
Telephone: 800-825-6544
Fax: 800-888-4944
Representatives are available
Mon – Fri 8:00-5:00 EST

Technical Service and Support:
Telephone: (800) 816-5608

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W4OP
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Posts: 421


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« Reply #2 on: February 21, 2013, 05:54:14 PM »

Thanks Greg. I was looking at their catalog last night and w/o having the gear to look at, I believe it is a 20 degree gear with a 32 pitch/ 1.5" diameter and 48 teeth. Another ham is going to send me a pix of that area of the VFO. If I buy one, I guess I'll need two and have to mill slots for the backlash springs.

Once I confirm the gear- I might be able to find some cheap in the hobby area of eBay- model cars etc. Small Parts want around $20/gear

The real shame is that I sold an NCX-5 parts rig a couple years ago. Lesson learned- never sell anything.

Tnx,

Dale w4OP
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