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General Vintage Technology Discussions For general discussions about vintage radio and other vintage electronics etc. |
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8th Apr 2014, 10:46 am | #1 |
Hexode
Join Date: Mar 2008
Location: Wakefield, West Yorkshire, UK.
Posts: 438
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Database of transformers and knobs etc.
Is there any mileage in having a database of transformers and knobs etc?
I've got some output transformers and knobs and no idea what sets they might be for. If there was a picture database I could identify. The problem is, I suppose, is that there are thousands of designs. |
8th Apr 2014, 1:13 pm | #2 |
Rest in Peace
Join Date: Apr 2011
Location: Matlock, Derbyshire, UK.
Posts: 1,378
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Re: Database of transformers and knobs etc.
Good idea.
To rewind an output transformer the number of turns and wire thickness is needed but can often be measured, however, the inductance depends on the iron gap which cannot be measured if the winding is open circuit. The gap could be set to get the proper inductance now that inductance meters are available at reasonable cost. |
8th Apr 2014, 4:23 pm | #3 |
Dekatron
Join Date: Nov 2003
Location: Near Leeds, West Yorkshire, UK
Posts: 4,609
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Re: Database of transformers and knobs etc.
A much bigger problem is the hundreds of hours needed to compile all this!
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Mike. |
8th Apr 2014, 8:51 pm | #4 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,171
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Re: Database of transformers and knobs etc.
These can often be pressed into service for a variety of sets (op trans) by feeding with low voltage 50Hz and measuring their ratio.
Mains transformers, simply applyt mains and measure voltages. Ed |