bearhifi Posted April 26, 2006 Share Posted April 26, 2006 Hello everyone, I am in the process of rebuilding these speakers that I found and they use the T-35 tweeter and the Atlas PD-5VH mid horn. The driver is a CTS and the cabinet is well made as well. They are called Beta speakers and they were made in Dallas Texas in 1977 to 1982, slotted $1200 a pair new, 30 to 18k + or - 5 db, xver at 400 and at 5k, Any suggestion on the project would be great! And any suggestion with the crossover would be extremely great full. Thanks Frank Quote Link to comment Share on other sites More sharing options...
BS Button Posted April 26, 2006 Share Posted April 26, 2006 Are those tiny ports on the sides? Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted April 26, 2006 Share Posted April 26, 2006 Those look pretty cool. The crossover is pretty close to LaScala / Belle / Khorn. The type A or AA cross at 6k. The age of the caps on the crossovers would make them due for using fresh caps to get them back to spec. Other than that small thing, they shouldn't need anything to sound fabulous. Probably already sound quite decent. What are your impressions so far? Quote Link to comment Share on other sites More sharing options...
bearhifi Posted April 26, 2006 Author Share Posted April 26, 2006 Yes, however only the two middle ones are used as ports Quote Link to comment Share on other sites More sharing options...
bearhifi Posted April 26, 2006 Author Share Posted April 26, 2006 The sound ok, its a little on the bright side. But thats hooked up to SS grear as i am repairing my W5s... Quote Link to comment Share on other sites More sharing options...
bearhifi Posted April 26, 2006 Author Share Posted April 26, 2006 Heres a better shot of the crossover... Quote Link to comment Share on other sites More sharing options...
bearhifi Posted April 26, 2006 Author Share Posted April 26, 2006 inside Quote Link to comment Share on other sites More sharing options...
BS Button Posted April 26, 2006 Share Posted April 26, 2006 Heres a better shot of the crossover... Looks like Dean G. on crack. this is more like it...ahhhhh Quote Link to comment Share on other sites More sharing options...
bearhifi Posted April 26, 2006 Author Share Posted April 26, 2006 Heres a better shot of the crossover... Looks like Dean G. on crack. this is more like it...ahhhhh Nice work!!! Do you think those would work in these speakers? The biggest cap I see in the Beta is a 12uf for the mid. Quote Link to comment Share on other sites More sharing options...
BS Button Posted April 26, 2006 Share Posted April 26, 2006 Ahem, Dean, Bob, where are you? there's work here that lies ahead Quote Link to comment Share on other sites More sharing options...
BEC Posted April 26, 2006 Share Posted April 26, 2006 Well, looks like an autotransformer is used. We really would need to know the attenuation that it is set up for. Also, if it is using the 6 uF cap for the tweeter, I don't know how the T-35 lives through that. I would have to do some measurements on the crossover to know what is going on there. Anyway, can't see why somewhere between a Klipsch type A and a type B wouldn't cover the problem. Bob Quote Link to comment Share on other sites More sharing options...
djk Posted April 27, 2006 Share Posted April 27, 2006 The woofer section looks like 12dB. The composite 12µF cap looks like it feeds the autoformer. The output of the autoformer goes through the switch, giving two choices for mid level. The two caps for the tweeter look to be in series, 1.5µF total. The wax filled caps are ElectroCube, stacked film type with hand soldered teflon wire terminations. They sound vastly better than the spiral-wrap-and-end-mashed-into-tin-paste that the Solen type are(Hovland and Theta are soldered), the connections don't degrade anywhere near as bad over time. I bet they still measure good. Quote Link to comment Share on other sites More sharing options...
bearhifi Posted April 27, 2006 Author Share Posted April 27, 2006 The woofer section looks like 12dB. The composite 12µF cap looks like it feeds the autoformer. The output of the autoformer goes through the switch, giving two choices for mid level. The two caps for the tweeter look to be in series, 1.5µF total. The wax filled caps are ElectroCube, stacked film type with hand soldered teflon wire terminations. They sound vastly better than the spiral-wrap-and-end-mashed-into-tin-paste that the Solen type are(Hovland and Theta are soldered), the connections don't degrade anywhere near as bad over time. I bet they still measure good. You are correct that the tweeter caps are in series.... 1.5 uf... Wow it didnt see that ... Quote Link to comment Share on other sites More sharing options...
DizRotus Posted April 27, 2006 Share Posted April 27, 2006 Now that's interesting. Has anyone here ever seen one of these before? The woodworking looks good. With a real balancing network and the right source material this could sound very good. I cast a VOT for this to be dubbed the original Cornscala. Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted April 27, 2006 Share Posted April 27, 2006 Now that's interesting. Has anyone here ever seen one of these before? The woodworking looks good. With a real balancing network and the right source material this could sound very good. I cast a VOT for this to be dubbed the original Cornscala. Yeh, I was thinking LaScala on top and VOT on the bottom... all in one cab. Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted April 27, 2006 Share Posted April 27, 2006 Now that's interesting. Has anyone here ever seen one of these before? The woodworking looks good. With a real balancing network and the right source material this could sound very good. I cast a VOT for this to be dubbed the original Cornscala. Yeh, I was thinking LaScala on top and VOT on the bottom... all in one cab. bearhifi, about what are the dimensions on these cabs? ballpark o.k. Quote Link to comment Share on other sites More sharing options...
bearhifi Posted April 27, 2006 Author Share Posted April 27, 2006 Now that's interesting. Has anyone here ever seen one of these before? The woodworking looks good. With a real balancing network and the right source material this could sound very good. I cast a VOT for this to be dubbed the original Cornscala. Yeh, I was thinking LaScala on top and VOT on the bottom... all in one cab. bearhifi, about what are the dimensions on these cabs? ballpark o.k. I came up with about 3.8 cu feet for the inside of the box... I would give it more like maybe 4cf. There really is two sections one is 19.25 X 24.5 X 8.25... And the other is 14.5 X 11.5 X 15.5... Quote Link to comment Share on other sites More sharing options...
bearhifi Posted April 28, 2006 Author Share Posted April 28, 2006 I was thinking about using the type B CS crossover on them or should I stick with the type A? Thanks Frank Quote Link to comment Share on other sites More sharing options...
MarkBK Posted April 28, 2006 Share Posted April 28, 2006 Very cool! What are the cab dimensions? Who made the drivers (other than the T35a)? Quote Link to comment Share on other sites More sharing options...
bearhifi Posted April 29, 2006 Author Share Posted April 29, 2006 Very cool! What are the cab dimensions? Who made the drivers (other than the T35a)? Hello, It has an Atlas PD-5VH mid horn and the driver is a 12" CTS with about a little more than 4 cuft inside. Quote Link to comment Share on other sites More sharing options...
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