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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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21st May 2022, 4:06 pm | #1 |
Tetrode
Join Date: May 2007
Location: Downham Market, Norfolk, UK.
Posts: 83
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Defiant transistor radio
Hi All Dave here!!
I just picked up this vintage radio for a auto jumble today! What you people think?? So I want to power it up but is got to 2 sets of wires for what would be the old 4.5v battery’s how do I convert it to run with a 9v battery? And any Curcit diagrams would be amazing! Thanks Dave .
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21st May 2022, 4:23 pm | #2 |
Dekatron
Join Date: Aug 2013
Location: Wigan, Greater Manchester, UK.
Posts: 9,427
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Re: Defiant transistor radio
Do you have a model number of the set or have you information that the set uses 4.5v batteries?
Rather than try to use a 9 volt battery, if they are 4.5V, you could use 2 sets of 3x AA batteries. Holders are available for AA batteries, it would keep the radio original. https://cpc.farnell.com/pro-power/pp...wer%20Supplies
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Frank |
21st May 2022, 4:56 pm | #3 |
Dekatron
Join Date: Nov 2003
Location: Fakenham, Norfolk, UK.
Posts: 4,245
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Re: Defiant transistor radio
I can't think of a Defiant model that used separate 4.5V batteries - Perdio did in various of their models, and flat hand-lamp 4.5V batteries were popular on the Continent - but several Defiants were designed for the 4.5+4.5V PP11, essentially a PP9 in two sections. Standard colour code for the battery wiring was red positive, black negative, green for the mid point.
Paul |
21st May 2022, 6:11 pm | #4 |
Hexode
Join Date: Nov 2013
Location: Lancing, West Sussex, UK.
Posts: 284
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Re: Defiant transistor radio
I just wondered if it could be a Defiant A%Dhttps://www.radiomuseum.org/r/co_op_defiant_a5a.htmlefiant A5.
Regards Trevor. |
21st May 2022, 6:37 pm | #5 |
Dekatron
Join Date: Oct 2003
Location: Croydon, Surrey, UK.
Posts: 7,548
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Re: Defiant transistor radio
Yes, we need a model number and some pictures (a picture speaks 1000 words)! You can't always just 'modify' something to work on a different supply. If it uses a centre-tapped supply (4.5 + 4.5) it might not be easy. Certainly you cant just wire in a 9V battery if that is the case.
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21st May 2022, 6:42 pm | #6 |
Pentode
Join Date: Mar 2003
Location: Mansfield Woodhouse, Nottinghamshire, UK.
Posts: 215
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Re: Defiant transistor radio
There is a thread here which shows you the modification. I haven't done it to my A55 yet, still running on 2 x 4.5V batteries.
https://www.vintage-radio.net/forum/...&highlight=a55
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