I've got two different ones, on paper only (that I can find), and C3/C4 are different values, and different places in the circuit, for both...
For this one:
C3 10uf/50v, C4 14uf/50v
For this one:
C3 2uf/50v, C4 32uf/50v.
Roscoe
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| Author: | Jim G [ November 19th, 2023, 9:01 am ] |
| Post subject: | Re: New xovers... |
Roscoe, Any chance you downloaded those UREI schematics from these links 10 years ago? Someone else at Lansing just asked for the same information you did and those links are dead. Naturally, I didn't download and post the readable schematic there at the time for posterity. If not, can you tell me the C3 and C4 values? Thanks |
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| Author: | Roscoe Primrose [ November 19th, 2023, 11:33 am ] |
| Post subject: | Re: New xovers... |
I’m pretty sure I have it around here somewhere, let me see what I can find…. |
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| Author: | Roscoe Primrose [ November 21st, 2023, 12:13 pm ] |
| Post subject: | Re: New xovers... |
I've got two different ones, on paper only (that I can find), and C3/C4 are different values, and different places in the circuit, for both... For this one: C3 10uf/50v, C4 14uf/50v For this one: C3 2uf/50v, C4 32uf/50v. Roscoe |
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| Author: | Jim G [ November 21st, 2023, 1:45 pm ] |
| Post subject: | Re: New xovers... |
Roscoe, thank you very much for digging those up. Per our text exchange it does appear the first one is the 830 network for the 811B. I shared that link at Lansing Heritage and we're looking for confirmation from a member there who has built several 811B crossovers with high quality parts. |
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| Author: | Roscoe Primrose [ November 21st, 2023, 1:51 pm ] |
| Post subject: | Re: New xovers... |
Which version of the driver was in the 811Bs? Roscoe |
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| Author: | Jim G [ November 21st, 2023, 2:24 pm ] |
| Post subject: | Re: New xovers... |
The 'B' Series was the PAS coax woofer (instead of Altec) and the JBL 2425 compression driver (instead of Altec) An excellent chronology of the 604/UREI development is here: https://www.technicalaudio.com/pdf/Dupl ... UPLEX.html |
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| Author: | Roscoe Primrose [ November 21st, 2023, 11:14 pm ] |
| Post subject: | Re: New xovers... |
Those are the ones I have 
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| Author: | Jim G [ November 22nd, 2023, 2:20 pm ] | |||
| Post subject: | Re: New xovers... | |||
Roscoe Primrose wrote: Those are the ones I have Oh, like these?  Here's a little 811B porn for you Roscoe.
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| Author: | Roscoe Primrose [ November 22nd, 2023, 5:48 pm ] |
| Post subject: | Re: New xovers... |
Not quite in that kind of shape.... Or in such nice cabinets, or as well-built crossovers... Roscoe |
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| Author: | Jim G [ November 22nd, 2023, 10:09 pm ] |
| Post subject: | Re: New xovers... |
Yeah, that guy does really nice work including making those wood horns to replace the blue plastic ones. 
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