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| Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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22nd Dec 2017, 11:13 am
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#61 |
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Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Murphy A188C repair.
My guess is that it's an RF screen to help prevent any radiation from the underneath of that section of the chassis being picked up by the frame antenna.
Lawrence. |
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22nd Dec 2017, 11:22 am
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#62 |
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Banned
Join Date: Dec 2013
Location: Middlewich, Cheshire, UK. & Winter in the Philippines.
Posts: 3,897
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Re: Murphy A188C repair.
From memory this screen is over the output valves so it's a screen for the upper chassis to avoid pickup and a heat shield too, directing the heat out through the back.
I didn't know it was connected to the pick up sockets, presumably to the ground side. |
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22nd Dec 2017, 12:08 pm
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#63 |
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Octode
Join Date: May 2011
Location: Bromyard, Herefordshire, UK.
Posts: 1,241
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Re: Murphy A188C repair.
That all makes sense chaps. If it didn't have the earth wire it would be obvious as to some sort of heat shield. But the shield is grounded through the earth of the pick up.
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24th Dec 2017, 9:34 am
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#64 |
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Octode
Join Date: May 2011
Location: Bromyard, Herefordshire, UK.
Posts: 1,241
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Re: Murphy A188C repair.
Well a long stint saw the set finished yesterday. It's remarkable I find what you think will be only an hour or so turns into several to rebuild it back into the cabinet. Ready to be delivered this morning to adorn my best pals 'great hall' .
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24th Dec 2017, 11:05 am
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#65 |
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Banned
Join Date: Dec 2013
Location: Middlewich, Cheshire, UK. & Winter in the Philippines.
Posts: 3,897
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Re: Murphy A188C repair.
Very smart, lucky guy.
A big set but lovely to look at and listen to. |
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25th Dec 2017, 11:52 am
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#66 |
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Octode
Join Date: May 2011
Location: Bromyard, Herefordshire, UK.
Posts: 1,241
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Re: Murphy A188C repair.
Delivered. My friends dog carried out the perfect 'His Masters Voice'
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25th Dec 2017, 11:58 am
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#67 |
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Octode
Join Date: May 2011
Location: Bromyard, Herefordshire, UK.
Posts: 1,241
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Re: Murphy A188C repair.
Video link .
https://youtu.be/W-9ZlG9S9E4 |
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27th Dec 2017, 11:34 am
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#68 |
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Octode
Join Date: May 2011
Location: Bromyard, Herefordshire, UK.
Posts: 1,241
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Re: Murphy A188C repair.
I'd like to thank everyone who shared an interest and contributed to this thread . This thread can now be closed.
Many thanks. Dave |
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27th Dec 2017, 10:38 pm
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#69 |
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Dekatron
Join Date: Jan 2005
Location: Oxford, UK.
Posts: 17,846
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Re: Murphy A188C repair.
Loved the doggy video. Well done.
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