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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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15th Apr 2018, 2:37 pm | #21 |
Dekatron
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 9,642
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Re: New Member and need to identify a set (Jonell)
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18th Apr 2018, 9:09 pm | #22 | ||
Triode
Join Date: Apr 2018
Location: Northampton, Northamptonshire, UK.
Posts: 41
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Re: New Member and need to identify a set (Jonell)
Quote:
Quote:
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20th Apr 2018, 11:56 am | #23 |
Octode
Join Date: Jun 2005
Location: Sheffield, South Yorkshire, UK.
Posts: 1,227
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Re: New Member and need to identify a set (Jonell A50)
I remember stopping at the stage where a plate was strongly soldered to the chassis and not going further Do you have pic of the back that you can post?
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20th Apr 2018, 5:55 pm | #24 |
Triode
Join Date: Apr 2018
Location: Northampton, Northamptonshire, UK.
Posts: 41
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Re: New Member and need to identify a set (Jonell A50)
Mine was backless when I got it. I was hoping to find a picture somewhere of a back so I could recreate it somehow.
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22nd Apr 2018, 10:11 am | #25 |
Octode
Join Date: Jun 2005
Location: Sheffield, South Yorkshire, UK.
Posts: 1,227
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Re: New Member and need to identify a set (Jonell A50)
That's 2 of us . I made one from a piece off a radiogram .
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22nd Apr 2018, 1:32 pm | #26 |
Triode
Join Date: Apr 2018
Location: Northampton, Northamptonshire, UK.
Posts: 41
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Re: New Member and need to identify a set (Jonell A50)
Ok... I have started taking it to bits.
First thing that jumps up is the fact that the mains transformer is just (as suggested here before) is just a heater supply. The HT is coming straight off the mains supply and being fed via a rotten 50 ohm resistor directly to pins 3 and 5 in what to me means that the tube is being used as a half wave rectifier. This also would explain the extra filter capacitors on the HT. I have removed both the transformer and the choke and found that at least one wire has chafed through to the chassis causing a short, also a heater wire has been melted by contact to a valve base. Many other issues with the set. I quickly metered out the on/off switch and that seems to be open too. I'm hoping its a dirt issue rather than full failure but we shall see. This is going to be more in depth than just a quick cap swap, especially now I am dealing with a live chassis set. I shall keep you all informed! For those who want to see pre dismantle pictures, I loaded a quick gallery at http://www.terminalcomputers.com/radio/index.html George |
22nd Apr 2018, 9:31 pm | #27 |
Dekatron
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 9,642
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Re: New Member and need to identify a set (Jonell A50)
Continued here: https://www.vintage-radio.net/forum/...20#post1037320
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