why no seperate horn forums

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Yes, it would be perhaps more useful than the high-efficiency section of AA.

Latest mutation of the workshop system:
 

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Puzzled, I checked my settings and pm is enabled, although I've not ever received any. You have my email address somewhere, we were discussing telescope shelters. BTW, I met with Randy this week and he does know your friend Bill.
Closer to topic, I have a 9 inch workshop lathe in RCAF blue, which I used to make some parts for the hornguy to mount a D175 on his lovely cast aluminum horn [talk about DIY!]. He's off to Oswald's Mill with it this weekend. Here's a photo.
 

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bz,

Look at the bottom of your post frame. It says [WWW]. If pm is enabled it would say .

Oh yeah, I 'member. Great memory just overloaded. :(

That is a fine looking aluminum conical horn. What was it originally a microwave antenna?

My Southbend is the big one with 16" swing and 36" bed. I have a 3 and 4 jaw chucks, steady rest and complete collett system but haven't ever used colletts.

I like turning good aluminum alloys. Easy to machine and polish oh so nicely. I just turned a pair of 400 Hz front horns in mine out of solid Black Walnut.
 

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Since we're on about horns here, this is a picture of my just completed walnut 400 Hz front horns. The component being turned in the lathe picture of the previous post is the adapter ring that mounts a 4" driver to the throat at the back of the horn. It is the last step section seen in this photo (left horn) held on with 1/4-20 brass screws.
 

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