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Aqua-Signal 24vDC Inverter PCB Showing both sides of the board from of an Aqua-Signal 1 1503-007 24vDC inverter for 2 x 20w fluorescent lamps from 1994. This was very hard to photograph as the conformal coating is *very* shiny and the board has to be placed an angle in order for the reflection not to obscure any details. The two main NPN transistors doing all the work are some BD249C's. There are a lot of spaces which have not been populated so they obviously use this PCB layout for other models.

Aqua-Signal 24vDC Inverter PCB

Showing both sides of the board from of an Aqua-Signal 1 1503-007 24vDC inverter for 2 x 20w fluorescent lamps from 1994.
This was very hard to photograph as the conformal coating is *very* shiny and the board has to be placed an angle in order for the reflection not to obscure any details.
The two main NPN transistors doing all the work are some BD249C's.
There are a lot of spaces which have not been populated so they obviously use this PCB layout for other models.

387A3433.jpg 387A7538.JPG 387A7540.jpg 4B56AD88-9666-4627-A1A1-55AA2A10E1AA.jpeg 50_70_SONMBI_GEARBI.jpg
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Filename:387A7540.jpg
Album name:FrontSideBus / Control gear
Filesize:4028 KiB
Date added:28 Oct, 2019
Dimensions:3070 x 2048 pixels
Displayed:25 times
URL:http://80.229.24.59:9232/gallery/displayimage.php?pid=12873
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Ash   [07 May, 2020 at 08:14 PM]
The rest of the space could be for the charging circuitry of a normal EM inverter ?
BC5-80   [08 May, 2020 at 09:54 AM]
That looks well made. Are the transistors operated in free air without heatsinks? It must be efficient if so, or perhaps they're clamped to the metal case?
FrontSideBus   [08 May, 2020 at 01:16 PM]
They are clipped to the side of the case.

Comment 1 to 3 of 3
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