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Cambridge Audio R50 Transmission line speakers + DIY

 
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Lee in Montreal
Senior Contributor 200+


Joined: 22 Aug 2009
Posts: 203

PostPosted: Sun Oct 18, 2009 11:25 pm    Post subject: Cambridge Audio R50 Transmission line speakers + DIY Reply with quote

Cambridge Audio R50 was a transmission line speaker from the 1970's using B139, B110 and T27.



More details here
http://baobab-audio.com/index_files/Page321.htm

How to replicate one. Better have a friend who’s quite handy. My own design was very, very similar (17 years ago) and I really sweated. This version uses only 3 drivers, but it is more than enough. Who needs ultrasonic drivers at our age?

Here are some pretty clear blueprints
http://homepage.mac.com/planet10/TLS/downloads/Pro9TL-1.pdf

And for a bit more, with different drivers and some design changes.
http://homepage.mac.com/planet10/TLS/downloads/Pro9TL-Mk2.pdf

Lee
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ColinR
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Joined: 31 Jul 2004
Posts: 1175
Location: Staffordshire

PostPosted: Mon Oct 19, 2009 10:33 am    Post subject: Reply with quote

The above post is worthy of Winkepedia.

B. J. Webb a retired schoolteacher (and perfect gentleman) designed the R50, which was bought a a complete design according to Stan Curtis, a former director of Cambridge Audio.

Burt's DIY version may be found in The Audio Amateur issue 1/75.

Chris Rogers version is a “copyright avoidance” design not a “proper job”!
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TL 200
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Joined: 27 Jul 2009
Posts: 141
Location: Emmer-Compascuum The Netherlands

PostPosted: Tue Oct 20, 2009 11:32 am    Post subject: Reply with quote

ColinR wrote:
The above post is worthy of Winkepedia.

B. J. Webb a retired schoolteacher (and perfect gentleman) designed the R50, which was bought a a complete design according to Stan Curtis, a former director of Cambridge Audio.

Burt's DIY version may be found in The Audio Amateur issue 1/75.

Chris Rogers version is a “copyright avoidance” design not a “proper job”!


Naughty Rogers. But he's not the only one who copies a design, seen lots of different versions of Baileys design too.
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ColinR
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Posts: 1175
Location: Staffordshire

PostPosted: Tue Oct 20, 2009 11:50 am    Post subject: Reply with quote

Very Happy

Don't forget Martin Colloms' Monitor Audio MA4 has the same box size, driver complement and crossover as the Stag Statesman Shocked.
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