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5th Jan 2012, 9:04 pm | #1 |
Octode
Join Date: Jul 2011
Location: Leicester, Leics. UK.
Posts: 1,685
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12V, mains TV valve, superhet!
I find this extremely cool. I wonder how far this concept has been explored?
http://cool386.tripod.com/12vsuperhet/12vsuperhet.html Tony |
5th Jan 2012, 10:21 pm | #2 |
Dekatron
Join Date: Mar 2008
Location: Worthing, West Sussex, UK
Posts: 5,185
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Re: 12V, mains TV valve, superhet!
Very clever design, it just goes to show how versatile valves can be, especially at so low an HT supply.
Mark |
5th Jan 2012, 11:32 pm | #3 |
Moderator
Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,970
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Re: 12V, mains TV valve, superhet!
Unsurprisingly the audio output is very low, but it's an interesting proof of concept.
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6th Jan 2012, 1:23 am | #4 |
Dekatron
Join Date: Jul 2008
Location: Charmouth, Dorset, UK.
Posts: 3,601
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Re: 12V, mains TV valve, superhet!
Vey interesting that especially the simple grid bias arrangement.
Peter |
6th Jan 2012, 10:13 am | #5 |
Dekatron
Join Date: Sep 2006
Location: Kilmarnock, Ayrshire, UK.
Posts: 5,422
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Re: 12V, mains TV valve, superhet!
Hi.
Very similar to the valve car radio headunits available in the 60's. The op from the set would drive an OC16 or a little chip output stage with ease!
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Cheers, Trevor. MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member |
6th Jan 2012, 10:27 am | #6 | |
Dekatron
Join Date: Jul 2008
Location: Charmouth, Dorset, UK.
Posts: 3,601
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Re: 12V, mains TV valve, superhet!
Quote:
Peter |
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6th Jan 2012, 8:21 pm | #7 |
Octode
Join Date: Jul 2011
Location: Leicester, Leics. UK.
Posts: 1,685
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Re: 12V, mains TV valve, superhet!
I wonder if he'd get more volume with a high impedance unit and horn?
Tony |
7th Jan 2012, 10:52 am | #8 |
Dekatron
Join Date: Sep 2006
Location: Kilmarnock, Ayrshire, UK.
Posts: 5,422
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Re: 12V, mains TV valve, superhet!
Yes most likely, the horns are very efficient but not particularly good fidelity.
__________________
Cheers, Trevor. MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member |