Dial Lamp Puzzle.

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Dial Lamp Puzzle.

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Robert Darwent

Senior Transmitter Engineer

Posts: 244
Reputation: 3
Location: Sheffield, South Yorkshire, UK

#19

17-08-2012, 09:17 PM

(17-08-2012, 08:58 PM)pwdrive Wrote: For diode dropper calc, Vout = Vin x .707 then use this product to calculate the value of any additional series resistance required

Actually, Lawrence that is not quite right;

Dropper Resistance = (Vs - (Vh x 1.414)) divided by (Ih x 1.414)

where;

Vs = supply voltage
Vh = heater voltage
Ih = heater current

Regards

Robert G0UHF
www.wavesintheair.co.uk

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Messages In This Thread

Dial Lamp Puzzle. - by Joe - 17-08-2012, 09:27 AM

RE: Dial Lamp Puzzle. - by pwdrive - 17-08-2012, 09:47 AM

RE: Dial Lamp Puzzle. - by AlanBeckett - 17-08-2012, 09:49 AM

RE: Dial Lamp Puzzle. - by Joe - 17-08-2012, 09:56 AM

RE: Dial Lamp Puzzle. - by pwdrive - 17-08-2012, 09:57 AM

RE: Dial Lamp Puzzle. - by Joe - 17-08-2012, 11:41 AM

RE: Dial Lamp Puzzle. - by pwdrive - 17-08-2012, 11:58 AM

RE: Dial Lamp Puzzle. - by Robert Darwent - 17-08-2012, 02:31 PM

RE: Dial Lamp Puzzle. - by Yorkie - 17-08-2012, 04:43 PM

RE: Dial Lamp Puzzle. - by pwdrive - 17-08-2012, 05:31 PM

RE: Dial Lamp Puzzle. - by Robert Darwent - 17-08-2012, 08:11 PM

RE: Dial Lamp Puzzle. - by Robert Darwent - 17-08-2012, 06:20 PM

RE: Dial Lamp Puzzle. - by pwdrive - 17-08-2012, 07:12 PM

RE: Dial Lamp Puzzle. - by Joe - 17-08-2012, 07:35 PM

RE: Dial Lamp Puzzle. - by Yorkie - 17-08-2012, 08:10 PM

RE: Dial Lamp Puzzle. - by pwdrive - 17-08-2012, 08:58 PM

RE: Dial Lamp Puzzle. - by Robert Darwent - 17-08-2012, 09:05 PM

RE: Dial Lamp Puzzle. - by pwdrive - 17-08-2012, 09:16 PM

RE: Dial Lamp Puzzle. - by Robert Darwent - 17-08-2012, 09:17 PM

RE: Dial Lamp Puzzle. - by pwdrive - 17-08-2012, 11:00 PM

RE: Dial Lamp Puzzle. - by Robert Darwent - 18-08-2012, 11:58 AM

RE: Dial Lamp Puzzle. - by Alistair D - 19-08-2012, 03:14 PM

RE: Dial Lamp Puzzle. - by Robert Darwent - 19-08-2012, 03:23 PM

RE: Dial Lamp Puzzle. - by Joe - 19-08-2012, 03:21 PM

RE: Dial Lamp Puzzle. - by Joe - 19-08-2012, 04:11 PM

RE: Dial Lamp Puzzle. - by Alistair D - 20-08-2012, 08:20 AM

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