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Author Topic: Johnson 6:1 reduction bearing unit  (Read 4157 times)
KC9QQM
Member

Posts: 184




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« on: July 10, 2012, 07:24:06 AM »

Hi All,

I have a FT-101e and the reduction device on the preselector is no longer working smoothly. It will sometimes slips and other times turns the inner shaft at the same rate as the outer.

Is there still a source for these new or do I need to look at eBay or a hamfest to get one?

73
Jeff
KC9QQM
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KC9QQM
Member

Posts: 184




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« Reply #1 on: July 10, 2012, 08:05:31 AM »

Did a quick search of things myself and found it is a jackson 6:1 vernier ball bearing 4511DAF. Ordered it from Surplus Supply of Nebraska.

Jeff
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KG6YV
Member

Posts: 515




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« Reply #2 on: July 10, 2012, 12:46:11 PM »

Make sure you buy the reduction drive with the collar that has the two holes for the set screws that mount the frequency dial.  Some don't have it....

Greg
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W9GB
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Posts: 2650




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« Reply #3 on: July 10, 2012, 07:48:00 PM »

Jackson Brothers (UK) is still in business and making reduction drives (Metric and English)
http://www.mainlinegroup.co.uk/jacksonbrothers/index.htm

Orem Elliott Products (USA, Ohio) makes and sells planetary drives.
http://www.orenelliottproducts.com/planetar.htm

Shop around for BEST prices, Bob Grinnell at Surpkus Sales of Nebraska is not a price discounter.

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KC9QQM
Member

Posts: 184




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« Reply #4 on: July 13, 2012, 12:12:03 PM »

Thanks for the replies, yes the one I bought and got in yesterday has that front brass ring with the 2 thumb screws. Will be putting it in tonight and hopefully be able to get tuned up a bit quicker!!

Jeff
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K4DPK
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Posts: 1077


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« Reply #5 on: July 19, 2012, 07:44:41 PM »

Don't throw the old one away.

If you are careful you can use pliers and pinch the little tabs that hold the two shell halves together, which increases friction between the bass and the race.  Usually, that'll fix them.

Phil C. Sr.
k4dpk
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G3RZP
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Posts: 4834




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« Reply #6 on: July 27, 2012, 02:05:35 AM »

When you consider those came out before WW2, it's somewhat surprising that they are still made. Shows that a good design  can last.....
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K0IZ
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Posts: 739




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« Reply #7 on: July 27, 2012, 09:44:30 AM »

Thanks for very interesting link to Jackson Brothers.  I enjoyed reading their history.
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