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| General Vintage Technology Discussions For general discussions about vintage radio and other vintage electronics etc. |
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21st May 2014, 1:00 pm
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#1 |
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Pentode
Join Date: Jan 2014
Location: Alton, Hampshire, UK.
Posts: 170
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Tuneons.
Do other members share my enthusiasm for the neon tuning indicator which had a brief reign from about 1935 until the cathode ray type came in by 1936? Correctly biased the indicator is as sensitive as the later type and many still are in operation nearly 80 years later. Even when silvered they still work and are quite spectacular to watch! Ultra & Ever Ready were the main users but not many now survive. There seems little comment or interest in them.
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21st May 2014, 1:21 pm
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#2 |
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Moderator
Join Date: Dec 2010
Location: Exeter, Devon and Poole, Dorset UK.
Posts: 6,865
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Re: Tuneons.
As a Cossor collector I have some equipment with Tuneons including a 365 and a universal bridge.
Cossor also suplied Tuneons to other manufaturers. Cheers Mike T
__________________
Invisible airwaves crackle with life or at least they used to  Mike T BVWS member. www.cossor.co.uk |
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21st May 2014, 1:53 pm
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#3 |
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Dekatron
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 4,395
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Re: Tuneons.
I rather like the idea for its simplicity and the elegant use of an amplifying valve's screen grid as a bridge with minimal interfacing. Must get hold of one of the ex-Soviet IN-13 tubes...
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21st May 2014, 3:05 pm
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#4 |
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Rest in Peace
Join Date: May 2003
Location: Harlaxton, Lincolnshire, UK.
Posts: 3,944
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Re: Tuneons.
I have a Cossor 3180 and the (tatty) sheet of paper with it includes a basic circuit.
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21st May 2014, 3:31 pm
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#5 |
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Dekatron
Join Date: Aug 2007
Location: W.Butterwick, near Doncaster UK.
Posts: 8,932
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Re: Tuneons.
Yes, I have the Ultra 25 that uses one.
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G8JET BVWS Archivist and Member V.M.A.R.S |
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21st May 2014, 7:14 pm
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#6 |
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Pentode
Join Date: Jan 2014
Location: Alton, Hampshire, UK.
Posts: 170
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Re: Tuneons.
Great to see that original spec sheet Colin, thank you. Bias is often a bit of a problem to get the thing to strike reliably without any risk of overloading the tube, your sheet will be most useful!
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21st May 2014, 7:48 pm
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#7 |
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Rest in Peace
Join Date: May 2003
Location: Harlaxton, Lincolnshire, UK.
Posts: 3,944
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Re: Tuneons.
Hi Hansomcommon,
There is a sheet on Frank's Tube Data site, but it contains less info than the tatty piece of paper packed with my 3180.
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21st May 2014, 8:32 pm
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#8 |
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Dekatron
Join Date: Mar 2008
Location: Worthing, West Sussex, UK
Posts: 5,185
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Re: Tuneons.
I too have a good working example in my Ultra 25 radiogram, see here:
https://www.vintage-radio.net/forum/...ad.php?t=68081  Mark |
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21st May 2014, 10:07 pm
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#9 |
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Pentode
Join Date: Jan 2014
Location: Alton, Hampshire, UK.
Posts: 170
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Re: Tuneons.
Your radiogramme is superb Mark, I hope you can complete the restoration soon, Ultra wisely include a semi -variable resistor to set the tuneons bias so it will look good.
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21st May 2014, 10:31 pm
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#10 | |
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Dekatron
Join Date: Mar 2008
Location: Worthing, West Sussex, UK
Posts: 5,185
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Re: Tuneons.
Quote:
 The restoration can be seen here: https://www.vintage-radio.net/forum/...ad.php?t=78558 Mark Last edited by mark pirate; 21st May 2014 at 10:49 pm. |
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22nd May 2014, 7:52 am
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#11 |
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Pentode
Join Date: Jan 2014
Location: Alton, Hampshire, UK.
Posts: 170
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Re: Tuneons.
I missed that restoration Mark, A superb job, thank you for showing it!
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22nd May 2014, 11:49 pm
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#12 |
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Dekatron
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 9,642
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Re: Tuneons.
One post moved here: https://www.vintage-radio.net/forum/...d.php?t=106385
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