Differences

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--- telecoms:coventrycable [24/10/2024 08:36] – created - external edit 127.0.0.1
+++ telecoms:coventrycable [06/11/2025 12:23] (current) – [Distribution] andrew
@@ Line 56: / Line 56: @@
 GF in the diagram is the abbreviation for the [[https://telephone-exchange.co.uk/Coventry-Greyfriars-CMCGF.html|Greyfriars Exchange]] in Coventry.
+{{:telecoms:bt-cabletv-trunk.png?200 |}} Trunks
 ===== Distribution =====
@@ Line 68: / Line 71: @@
   - [[telecoms:texscanamp|Texscan wideband amplifier]] (White) (450MHz downsteam and approx 5MHz return path back to the headend), one input feed and either one loop through and two amplified outputs or one input and three outputs.
   - [[telecoms:alphafubapsu|Fuba]] ferro-resonant transformer, 240v input and  50V ac output. This would feed the amplifier in the cabinet and also line power any downstream line extender amplifiers, these were all located underground.
-  - 240v power supply feed to [[telecoms:alphafubapsu|Fuba]] transformer, via Wylex consumer unit.
+  - 240v power supply feed to [[telecoms:alphafubapsu|Fuba]] transformer, via Wylex consumer unit. Note the lack of a electricity supply provider main fuse / cutout, so the Consumer Unit was fed directly from the incoming street main cable. Unless this was already removed...
@@ Line 75: / Line 78: @@
 {{:rb:dla-cabinet-2.jpg?200|Green painted cabinet with a differnet design of ferroresonant transformer}} {{:rb:dla-cabinet-2-topconnections.jpg?200|Coax entries on the top}}  {{:rb:dla-cabinet-2-cables.jpg?200|Looking into the duct entries}}
+This one has been painted green for some reason and the transformer is made by Alpha.
+Depending on where they were in the network, some DLA cabinets had two transformers fitted, one for the the DLA amplifier and line extender amps fed from it's outputs and the second just for line power to other downstream amps. To avoid back feed, all the amps could have an isolator removed to make an unpowered input or output.
@@ Line 91: / Line 100: @@
 {{rb:procatv1.jpg?200|}}
 {{rb:procatv2.jpg?400|}}
 {{rb:procatv3.jpg?250|}}
+[[procatv-status-dwgs|ProCATV Status Monitor Circuit Diagrams]]
@@ Line 147: / Line 157: @@
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