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Joined: 31/12/2012
Location: New ZealandPosts: 9877
| Posted: 04:52am 02 Aug 2024 |
UPDATE:
I finally got around to looking into hacking these amps, so that I can power them from a LV DC supply, rather then trying to get 230v to work over the phone lines.
I took apart the spare Televes amp today - it is BEAUTIFULLY built, and built like a brick privy!!!
Take off the decal on the front, reveals the screws holding the diecast aluminum case together - 62 small machine screws!
...and that's JUST to get the lid off, so I could peek inside!
SMPS is simple single-rail 12v DC supply - yay!
Current consumption is 540mA @ 12v continuous, which I would expect for a TV amp.
That should be really easy to deal with either via a linear drop-down regulator arrangement, or perhaps a buck converter, as the original PSU inside the thing, is a SMPSU anyway. If I simply remove the internal SMPSU, there is then plenty of room int there, to easily fit some form of 12v PSU, which I can then feed from either 24vAC or 36vAC via the redundant phone pairs.
I attach some photos.
