Posted by lon [ 209.103.193.15 ] on May 13, 2005 at 18:07:39:
In Reply to: Re: Opinion: "The Brick" a folded TQWP for Tangband 871-S posted by GarMan on May 13, 2005 at 15:53:27:
I checked out the photos-- very nice workmanship.
I would be happy to get good midrange out of the TB's and
am beginning to think that the minimum for decent output is a
4 in driver like my Fostex FE127e's. I also have a set of
PVC pipes (4in diameter) with the old Radio Shack 1197's
which also perform well in a long pipe.
I did an experiment with a small baffle mount of the
TB 871-S in a PVC pipe of 41 in which is a quarterwave
length for 65 mhz IIRC.. don't quote me. 
It didn't work satisfactorily in that transmission line
concept: PVC pipe with straight pipe and a hard surface
terminus at the exit in the form of a flooring tile.
Not much count.
Here is a concept that I just ran across at the Full Range Driver Forum for a Fostex. The interesting thing about this one is that
it uses a similar concept as that of the Jordan VTL but for a much
less expensive single driver. This I thought was a real 'find'
and had not seen it anywhere before.
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