ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
So I got a pair of M75 speakers that looks in a bad condition.
Let's see what I can do making these boys as new again. Hope I can finish this thread completely.
No comments, just pictures....
Brengen & Ophalen
Leslie dont forget the small red ROE cap down in the corner, they are normally bad. Which caps are you going to use ??
Collecting Vintage B&O is not a hobby, its a lifestyle.
Is that a cap? The red one with the + and - on top?
Visaton? I don't know. Just asked a quote at my local specialised speakershop.
Yes thats the one, its not a bipolar cap, but polarized, and the trimmer on the board looks like black and old too.
What about the rectangled one above, ist that a cap to? Better keep my hands of the pot trimmer since it looks to be sealed?
Yes there are some more caps in there also the square one, but they are normally good, but change the red one, you can leave the trimmer in there, but I would change it, it is sealed but, take it out and measure the resistance, set the new one to the same, Its a 100 K Ohm, 0.1 Wat, a 0.25 Wat will also do, just ask at the shop where you get your caps. The red cap is 100 uF, 40V, a 100 uF, 63 V will also do, but polarized.
Thanks Soren for the info. Never thought about measuring the resistor first!
Leslie: Thanks Soren for the info. Never thought about measuring the resistor first!
Maybe we can Martin in here to tell how to adjust it, it is for the overload protection, very nice speakers, so we want this just right, I know they will look like new, but lets get the inside the same way.