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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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23rd Nov 2018, 1:34 am | #41 |
Heptode
Join Date: Nov 2018
Location: London SW16, UK.
Posts: 655
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Re: Osram Music Magnet 4
The problem is more elusive than I thought. I have insulated the HT wire and other wires under the rod with thin polyethylene sheets to stop them touching the brass rod and the metal chassis. But it does not cure the short.
The fact that the resistance between the HT+ and the earth is sensitive to the angular positions of the wave changer suggests the wave switch is also involved. It consisting of three spring loaded brass balls that move up and down depending if the balls lock into the concave holes of the rod. Look like I have to strip the whole thing down to get access to the switches which i dont have the confidence to do. Last edited by regenfreak; 23rd Nov 2018 at 1:37 am. Reason: typo |
23rd Nov 2018, 8:19 pm | #42 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,195
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Re: Osram Music Magnet 4
Hi Sing, HT is fed into all the cans and is on the rear terminal strip. Try separating the HT and the SG supplies, gradually working from the terminal strip (which could be leaky) outwards, re connecting each wire in turn.
Ed |
23rd Nov 2018, 10:00 pm | #43 |
Heptode
Join Date: Nov 2018
Location: London SW16, UK.
Posts: 655
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Re: Osram Music Magnet 4
Hi Ed thanks for your useful advice. I will have it another shot.
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