A suitable chimney can be made from a food-storage container that is
microwave oven safe. Such containers can be cut as needed with a
dedicated low-temp pencil-point soldering-iron tip. (Cost of container:
c. $1.40)
>I have decided to go with my original plan and build with 3CX1200 tubes.
>I am going to use the Z7 version per advice from several of you experts.
>I have most of the mechanical problems solved (ya sure) with the exception
>of cooling this thing. I searched my local Amp builder supply company
>(Home Depot) and found a very likely candidate for a chimney. The adaptor
>used to connect a toilet to the waste pipe is almost the correct size and
>shape. It of course is made of PVC(?) and would not withstand the
>heat(?). I have a friend that works in the heat treat industry and he
>offered to attempt to find a solution. I gave him a dead tube and the
>adaptor with the instructions to find someone that would machine this from
>Teflon. He did find a willing person but in order to get the Teflon in
>the correct size it would require a 1500 dollar min purchase from the
>Teflon supplier. This person suggested Phenolic(sp) as an alternative
>which could be purchased for under 200 dollars.
>
>
>
>Could you gentleman give me some input as to which material I can use
>please? I have no information on the material he is referring to as
>Phenolic. But he claims it to be very heat resistant and non conductive.
>I am sure he is talking about 60 cycle AC and not RF. So how about some
>suggestions? This is a wonderful opportunity for someone to tell me where
>to go.
>
>
>
>By the way I ordered Dahl plate and filament transformers (potted no less)
>and when the locals pull out the pictures of grand kids I whip out my pics
>of the xformers!!!
>
>
>
>Mike
>
>
>
>k8ze
>
>
>
>
>
>
>_______________________________________________
>Amps mailing list
>Amps@contesting.com
>http://lists.contesting.com/mailman/listinfo/amps
>
- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
www.vcnet.com/measures.
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