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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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9th Nov 2018, 10:26 pm | #1 |
Tetrode
Join Date: Nov 2009
Location: Southend-on-Sea, Essex, UK.
Posts: 60
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Ferguson 621U
Hi good people of vintge radio land,
Just wanted some experienced advice please regarding a Ferguson 621U with a mechanical tuning problem which I reckon is very common. The issue is that the tuning cursor can be moved up the scale but rotating the tuning knob will not bring it back down again. I put this down to the grease on the bearings of the tuning capacitor becoming more viscose over the years, rather than the cord stretching etc. The cap does feel quite stiff when rotating it directly by hand. Any recommendations as to what's best to re-lube this please - if indeed this is the problem? I've got two of these sets (one a project "yet to be done" although I doubt it will be) and both have the same issue. Thanks |
9th Nov 2018, 10:39 pm | #2 |
Nonode
Join Date: Oct 2017
Location: Bristol, UK.
Posts: 2,383
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Re: Ferguson 621U
A few drops of light machine oil such as 3 in one is what I usually apply to the TC bearings. Even if they are totally gunged that should loosen the existing grease to give you an indication if that is the problem. Slipping tuning cords are very common and there are quite a few old threads here on the topic. Light application of beeswax to the cord can often help. If there is not much tension in the cord then re-tensioning or replacing the cord might be necessary. I'm not familiar with this particular set but if there is not a diagram on the service sheet then photograph or sketch out the cord routing before you start fiddling because if disaster strikes and the cord breaks replacement is then that much easier.
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9th Nov 2018, 11:27 pm | #3 |
Tetrode
Join Date: Nov 2009
Location: Southend-on-Sea, Essex, UK.
Posts: 60
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Re: Ferguson 621U
Thanks cathoderay57, I'll give that a try. the cord seems OK and the tension is not too loose, but I'll give the 3 in 1 a go.
It used to work well on my push-bike! |
10th Nov 2018, 12:42 pm | #4 |
Octode
Join Date: Mar 2015
Location: Yorkshire, England.
Posts: 1,301
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Re: Ferguson 621U
You might like to purchase the manufacturers service sheets available up top.
I've just looked and you might like to confirm that yours is correctly strung and has not been tampered with.
__________________
Regards, Ken. BVWS member |
10th Nov 2018, 9:22 pm | #5 |
Tetrode
Join Date: Nov 2009
Location: Southend-on-Sea, Essex, UK.
Posts: 60
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Re: Ferguson 621U
Thanks Kentode. I've got the BVWS discs "somewhere safe" so I'll try and remember where that somewhere is and have a nosey through.
One of my sets belonged to my grandmother and was bought for her by my parents in the mid-to-late 50s. A nice memento. |