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Title: ISO Signetics Device Post by: WA2SQQ on March 31, 2022, 10:03:47 PM I'm wondering if anyone can help me find this one.... got involved in an interesting restoration project
Title: Re: ISO Signetics Device Post by: Pete, WA2CWA on March 31, 2022, 10:55:50 PM When you find one; please let us know.
They're probably still being marketed by the same company that pioneered the dark-emitting diode and dark bulb technology Title: Re: ISO Signetics Device Post by: WB3JOK on March 31, 2022, 11:30:43 PM You're supposed to post that one tomorrow (April 1st) ;D
I have several WOMs, but don't know if they are pin compatible with the Signetics part! 8) Title: Re: ISO Signetics Device Post by: WA2SQQ on April 01, 2022, 08:22:36 AM I’m also in search of LADs (light absorbing diodes)
Title: Re: ISO Signetics Device Post by: WA2SQQ on April 01, 2022, 11:10:26 AM Back in the 20's, potentiometers were scarce, so you adjusted the gain of a receiver by changing the value of the grid leak resistor. Resistors were cartridge type. MUTER released a Grid Leak Drip Pan that hung on the resistor.
Title: Re: ISO Signetics Device Post by: WA2SQQ on April 01, 2022, 11:13:13 AM And for all you who live in VT ..
https://www.npr.org/templates/story/story.php?storyId=4571982 Title: 75m Repeater Duplexer Post by: W1RKW on April 01, 2022, 11:24:24 AM My 75m Repeater Duplexer Setup
Title: Re: ISO Signetics Device Post by: KB2WIG on April 01, 2022, 06:46:19 PM Before you try the Signetics device, Electrical Engineers Toolkit: Analog Designer's Edition https://www.youtube.com/watch?v=vBvYHowmRWI may be of help. klc Title: Re: ISO Signetics Device Post by: W3SLK on April 02, 2022, 10:12:19 AM KB2WIG said:
Quote Before you try the Signetics device, Now THAT was awesome!!! :DElectrical Engineers Toolkit: Analog Designer's Edition https://www.youtube.com/watch?v=vBvYHowmRWI may be of help. klc Title: Re: ISO Signetics Device Post by: W1RKW on April 03, 2022, 11:05:20 AM rub a little Ideal Cream on your diode! LMAO!
Before you try the Signetics device, Electrical Engineers Toolkit: Analog Designer's Edition https://www.youtube.com/watch?v=vBvYHowmRWI may be of help. klc Title: Re: ISO Signetics Device Post by: Opcom on April 05, 2022, 02:35:17 AM Back in the 20's, potentiometers were scarce, so you adjusted the gain of a receiver by changing the value of the grid leak resistor. Resistors were cartridge type. MUTER released a Grid Leak Drip Pan that hung on the resistor. Once the resistor was up to temperature, perhaps it could be basted! |