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Title: Vacuum Variable Clamps Post by: WA1GFZ on December 20, 2009, 05:32:02 PM I was working on the rig today and almost dropped a vacuum variable when it slid out of the flange clamp. I thought it was tight. Anyway, does anyone know how tight (inch pounds) to set the 10-32 clamp screw so it holds the cap but doesn't break the seal. I have never seen that spec anywhere. I have a 2 inch clamp on the 500 pf plate tune and a 3 inch clamp on the load cap.
Title: Re: Vacuum Variable Clamps Post by: w1vtp on December 20, 2009, 06:46:22 PM YES! Please! I have essentially the same cap. Specs anyone?
Al Title: Re: Vacuum Variable Clamps Post by: WA1GFZ on December 20, 2009, 08:23:33 PM Al,
I have an email in to Jennings and will post the response when and if it comes. I had both caps bolted into a plate and was trying to measure the right angle drive height. It fell right into my lap and would have hit the floor if the right angle drive wasn't attached. I bet this is the reason many new caps have the flange soldered to the cap or they are part of the cap. Title: Re: Vacuum Variable Clamps Post by: k3zrf on December 21, 2009, 07:08:38 AM I have used this source from time to time
http://www.mgs4u.com/Jennings-flanges.htm Title: Re: Vacuum Variable Clamps Post by: WA1GFZ on December 21, 2009, 08:35:27 AM No Data there Dave.
Title: Re: Vacuum Variable Clamps Post by: k3zrf on December 21, 2009, 08:39:48 AM Hmmmmmm, no drawings?
http://www.mgs4u.com Start from there Title: Re: Vacuum Variable Clamps Post by: WA1GFZ on December 21, 2009, 09:07:30 AM Dave,
I been there but no data on how tight to make the clamp screw. Title: Re: Vacuum Variable Clamps Post by: w1vtp on December 21, 2009, 12:43:41 PM At least it's a start
http://www.mgs4u.com/Jennings-flanges.htm I'll check with some of my friends Al Title: Re: Vacuum Variable Clamps Post by: Rob K2CU on December 21, 2009, 01:52:46 PM here's a listing for the CSVF-500 that may apply to your case:
http://www.jenningstech.com/technotes/csvfflng.shtml 6.0 to 6.5 In-Oz for single screw flange, 3.5 to 4.0 In-Oz for dual screw type. Title: Re: Vacuum Variable Clamps Post by: WA1GFZ on December 21, 2009, 02:35:11 PM TNX Rob, That is the cap and I assume the same number for the FM3 on the loading cap AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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