Re: From another sourse
Having seen the offending item first hand, the parts attached to the board are all serviceable. Its the board itself that is the problem and the environment in which the transmitter is operating. My dad always told me never to buy a second hand car that had spent its life next to the sea; the reason- corrosion. Its the same with the Harris. It's now surrounded by sea water. There even salt marsh under the building. The cooling fans are blasting salt laden air across the backplane and its not in a good place or state. This is a big backplane running the whole height of the transmitter, the full cabinet width and it carries the main RF combiner which is a substantial piece of copper with torroidal coupling transformers on it. Also lots of ancilliary stuff to drive the amplifiers. There are lots of edge connectors which appear to be push fit a bit like wire wrap connections that rely on pressure rather than solder. These will not come out easily and i fear without causing further damage. Basically the board is a write off once removed and will require a lot of patience and skill to replace. Once replaced there will need to be some system of maybe re-circulating the cooling air. Not an easy task if fresh salty air is to be avoided, also I would suggest lacquering the board to minimise corrosion. Big task when cash is required elsewhere.
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From another sourse - StewartAdmin. December 21, 2023, 10:59 am
- Re: From another sourse - neilgates December 21, 2023, 11:44 am
- Re: From another sourse - No change December 21, 2023, 1:39 pm
- Re: From another sourse - neilgates December 21, 2023, 4:49 pm
- Re: From another sourse - No change December 21, 2023, 5:49 pm
- Re: From another sourse - Board Watcher December 21, 2023, 6:09 pm
- Re: From another sourse - Ray Dio December 23, 2023, 8:18 am
- Re: From another sourse - Freddy December 27, 2023, 4:50 pm
- Re: From another sourse - Freddy December 28, 2023, 8:35 am
- Re: From another sourse - The Messenger December 23, 2023, 8:46 pm
- Re: From another sourse - Board Watcher December 21, 2023, 2:31 pm
- Re: From another sourse - Not confused December 21, 2023, 7:33 pm
- Re: From another sourse - StewartAdmin. December 22, 2023, 12:06 pm
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