[Amps] Sources of CPVC for GS35b Chimney

[Will Matney]

Kevin,

If you don't care about the looks, or having a white chimney, you can use thick fish paper to make a good chimney. The blueish thick fish paper that is used in transformers will work well using about 0.020" thick stock or thicker. This stuff is very fire retardent as it has a clay mixed in with the pulp. This is available pretty cheap from several suppilers. I think Oceanstate Electronics carries it in sheets also. Some good stiff scissors and some glue is all you need to make them. If you can find a large paper shear, you can cut it staright as an arrow. These are the ones that have the knife you pull down on a platen table. 0.020" thick takes a little pressure to cut with scissors unless you have a large pair. A razor knife and a straight edge will work too. Any good paper glue or super glue will do. After you roll it up, there are some small brass angle brackets available from mouser and others you can mount at the bottom to secure it to the chassis.

Best,

Will

*********** REPLY SEPARATOR  ***********

On 4/13/06 at 12:29 PM Kevin LaHaie wrote:

>Hello group
>
>Among the many amp projects I have in the works, one is based on the
>GS-35b.
>
>Per Jim, K7RDX, 'Hot Water Rated' PCV in the 4" size is the perfect
>size and a durable material for a chimney.  This is known as CPVC to
>the pipe world, and apparently is good to several hundred degrees F.
>
>So, run to the local pipe or plumbing shop and get some, right?  WRONG!
>All the places I tried only stock it sizes up to 2".
>
>You can imagine their delight in my asking for 1 FOOT of the 4" size
>(still way more than I need!).  I was told that it comes in 10 foot
>lengths, and to special order it I may need to buy a pallet full.  This
>may be different depending on the relationship one has with the shop,
>but a 'walk in off the street ham' won't get any special favors!
>
>So, here perhaps is an opportunity for someone to buy a stock of 10
>footers, cut it into 1 foot lengths and provide us GS35b amp builders
>what we need?  Maybe offer to silkscreen the tube number on it? Your
>callsign? Your Amp's Name? (Ampzilla, for example)
>
>Just kidding. hihi
>
>Does anyone know of a source of this in small quantities?
>
>Thanks!
>
>Kevin K7ZS
>
>
>
>
>
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