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| Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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15th Sep 2017, 10:37 pm
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#1 |
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Pentode
Join Date: Apr 2010
Location: Norwich, Norfolk, UK.
Posts: 149
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Premier TRF kit radio
Just two quick questions, could anyone advise the correct value for the reaction control, and the probable cause of serious mains modulation?
I've just acquired a Premier which had been built, and possibly modified, by someone whose enthusiasm exceeded their ability, and the pot, which is damaged beyond repair, looks like it came from a 50's transistor set . It makes no difference to the reception, which is very weak (just about picks up TalkSport). Any help gratefully received, Rick. |
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15th Sep 2017, 10:47 pm
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#2 |
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Moderator
Join Date: Dec 2010
Location: Exeter, Devon and Poole, Dorset UK.
Posts: 6,875
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Re: Premier TRF kit radio
Hi Rick
This thread may prove useful  http://vintage-radio.net/forum/showthread.php?t=8347 Cheers Mike T
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Invisible airwaves crackle with life or at least they used to  Mike T BVWS member. www.cossor.co.uk |
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16th Sep 2017, 8:53 am
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#3 |
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Dekatron
Join Date: Aug 2013
Location: Wigan, Greater Manchester, UK.
Posts: 9,433
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Re: Premier TRF kit radio
For the modulation hum, check the filter capacitor across the mains supply, you may also need to put a small capacitor across the mains rectifier if there is not one already in the circuit.
With DC conversion receivers I sometimes had to put a toroid on the mains lead near the radio.
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Frank |
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