Amp/Preamp Asylum

This doesn't look like a 'factory' repair.

75.168.81.35

Ralph

M

In Reply to: RE: "don't know why somebody added a 200 ohm resistor on top of each one" posted by 1973shovel on March 06, 2025 at 05:00:58

I would expect that would have been a bit neater. The photo shows parts that could flop around during shipping.

Two things are sticking out here. The first is that the resistors are getting far too hot. If it were me I'd figure out why- is the circuit drawing too much current or are the resistors underrated. If the latter, why are there not also holes under them to promote cooling?

Follow Ups:

I sure hope it isn't, Ralph... - 1973shovel 07:44:39 03/08/25 (1)
...because you're right about the method and appearance. When the original poster wrote, "I've just bought a BMC MCCI phono stage" I assumed they meant that they bought it used. Although I do find it curious that the tacked on parallel resistors appear to be the same type (i.e. brand) as the originals, which makes me wonder if it were half-assed that way at the factory. I hope not.
- RE: I sure hope it isn't, Ralph... - katylied 00:30:07 03/09/25 (0)
  You are right, I've bought it used and the seller did not know about any repair because was not the original owner and probably did not care to look inside. Now I replaced the two 150 ohm with new one but leaving more space from the circuit board and soldered the 200 ohm on top of them (with some space in between). I've also replaced all the electrolytic caps in that area (one was "pregnant" as a technician friend told me) and the unit is working. I've ordered some 150, 200 and 120 ohm (the third one) same kind of resistor and when will arrive I will pass the unit to my technician in order to understand why was "modified".I amd also looking to find someone else who own the same phono stage in order to get some other inside pictures...

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