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| Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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25th Sep 2023, 8:16 pm
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#1 |
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Triode
Join Date: Jul 2023
Location: Sheffield, South Yorkshire, UK.
Posts: 27
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FM oscillator trimmer - Roberts R505
I have a couple of Roberts R505 radios where i have changed the elec Caps and brought them back to life. My local BBC station is Radio Sheffield on 104.1.
One radio picks this up where the other will not tune far enough and wont receive it. From a past thread on here i think i need to tune the FM oscillator trimmer. Hopefully someone can highlight a photo of the pcb showing which item i need to trim. Many thanks Paul |
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26th Sep 2023, 9:51 am
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#2 |
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Octode
Join Date: Dec 2008
Location: Wincanton, Somerset, UK.
Posts: 1,686
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Re: FM oscillator trimmer - Roberts R505
It's C2 on the FM tuner module
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26th Sep 2023, 10:21 am
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#3 |
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Triode
Join Date: Jul 2023
Location: Sheffield, South Yorkshire, UK.
Posts: 27
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Re: FM oscillator trimmer - Roberts R505
Thanks John
I will sort tonight (currently at work) Is there a data sheet showing what C1, C21 etc adjust ? Thanks again Paul |
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26th Sep 2023, 12:36 pm
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#4 | |
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Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,589
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Re: FM oscillator trimmer - Roberts R505
Quote:
__________________
-- Graham. G3ZVT |
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26th Sep 2023, 12:36 pm
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#5 |
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Dekatron
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 6,375
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Re: FM oscillator trimmer - Roberts R505
The Manufacturers Service Data available for download from top right of screen (under Instant Downloads) lists the various adjustments, the ERT Service Data also explains the various adjustments.
David |
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