Lamp for Rod Elliott ESP#22 Wein Bridge Osc?

lgreen · 4th August 2007, 06:12 PM

Hi, I am attempting to build the ESP Wein Bridge Oscillator (Project 22) which calls for:

"12V 50mA 'Grain of Wheat' lamps"

Looking for suitable lamps at Mouser, found this one (part 606-CM7219), 12V, 60mA (catalog page 94).

Anyone know if this is suitable, or if not, have a suitable part ##? I note that a digikey and mouser have a lot of lamps listed but many are not stocked or not available.

jaycee · 5th August 2007, 04:11 AM

To be honest any 12v bulb with a 50mA or thereabouts filament should do. The bulb isnt actually used to illuminate anything, it's used as a temperature drift compensator.

"Grain of Wheat" lamps are also know as "midget" lamps.. and used to be used in telephones and the like.

4th August 2007, 06:12 PM	#1
lgreen diyAudio Member Join Date: May 2003 Location: San Diego, USA	Lamp for Rod Elliott ESP#22 Wein Bridge Osc? Hi, I am attempting to build the ESP Wein Bridge Oscillator (Project 22) which calls for: "12V 50mA 'Grain of Wheat' lamps" Looking for suitable lamps at Mouser, found this one (part 606-CM7219), 12V, 60mA (catalog page 94). Anyone know if this is suitable, or if not, have a suitable part ##? I note that a digikey and mouser have a lot of lamps listed but many are not stocked or not available. __________________ My DIY audio projects- PartTimeProjects.com.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
repairing adjust Thorens TD125 wein bridge oscillator	pjpoes	Analogue Source	15	27th December 2006 05:10 PM
EMI Interference In Rod Elliott's DOZ Amplifier	EchoWars	Solid State	31	10th January 2005 11:08 PM
Trace Elliott schematic	Jarno	Tubes / Valves	1	15th July 2004 07:13 AM
Rod Elliott on GainCard and others	millwood	The Lounge	86	14th July 2003 11:42 AM
DAC, project 85 of Rod Elliott	tschrama	Digital Source	22	25th January 2002 12:27 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

5th August 2007, 04:11 AM	#2
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	To be honest any 12v bulb with a 50mA or thereabouts filament should do. The bulb isnt actually used to illuminate anything, it's used as a temperature drift compensator. "Grain of Wheat" lamps are also know as "midget" lamps.. and used to be used in telephones and the like.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)