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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only.

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Old 17th Feb 2020, 4:55 pm   #21
GeoffK
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Default Re: Dynatron Marlow RG24 refurb

Speakers with roll surrounds are longer throw and lower efficiency requiring a more powerful amplifier to get the perfomance from them. The damping of the amplifier would not suit long throw speakers and lead to distortion.
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Old 19th Feb 2020, 4:40 pm   #22
RetepSnikrep
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Default Re: Dynatron Marlow RG24 refurb

I took the magnet off the back of the dodgy speaker.
It's only held in place by that two screw clamp bracket.

Cleaned the gap and checked coil for damage, nothing really obvious.

I then reassembled, rotating magnet until I couldn't hear any noise from the coil touching the magnet when the cone was flexed.

Finally tightened it down and distortion has gone. All seems to be working well.

Maybe it got knocked off centre during transport to its new home.
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Old 24th Feb 2020, 11:09 pm   #23
GeoffK
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Default Re: Dynatron Marlow RG24 refurb

Well done in getting this working properly again.
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Old 24th Feb 2020, 11:58 pm   #24
Nickthedentist
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Default Re: Dynatron Marlow RG24 refurb

Impressive stuff and good pics, thanks for sharing.
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