40 uses for germanium diodes - Page 1
Forum section: electronics / projects

author: djsb
author_rank: Super Contributor
timestamp: April 08, 2012, 09:22:24 am
content: Worth a read if you want to tinker with radio stuff (how I got into electronics to begin with).http://n4trb.com/AmateurRadio/SemiconductorHistory/40%20Uses%20for%20Germanium%20Diodes.pdfThe 1N34A can still be bought on ebayhttp://www.ebay.co.uk/sch/i.html?_nkw=1n34+diode&_sacat=0&_odkw=1n35+diode&_osacat=0&_from=R40I work with embedded micro's (PIC) at work and am more and more drawn to the wonder of picking music from out of the air.Might try a few myself.David.

author: SeanB
author_rank: Super Contributor
timestamp: April 08, 2012, 10:03:28 am
content: I have a few around, as well as a few dozen NOS germanium transistors. Nice uses there, even though they are very old designs. I like the 2 terminal oscillator they show.

author: EEVblog
author_rank: Unknown
timestamp: April 08, 2012, 11:45:33 am
content: Wow, when does that date from I wonder?Dave.

author: Bored@Work
author_rank: Super Contributor
timestamp: April 08, 2012, 12:10:11 pm
content: Amazon lists the Third Edition with a date of 1964. But the PDF has the second edition.http://www.amazon.com/Uses-Germanium-Diodes-Sylvania-Electric/dp/B002BRJHQ8Popular Mechanics had an advertisement for an unknown edition in the September 1950 issuehttp://books.google.com/books?id=mdgDAAAAMBAJ&pg=PA277&lpg=PA277&dq=40+uses+for+germanium+diodes

author: EEVblog
author_rank: Unknown
timestamp: April 08, 2012, 12:37:13 pm
content: BTW, I'm getting a whole stack of old Electronics Australia magazines next week.I sense a Magazine Memories Monday coming on...Dave.

author: Greg323i
author_rank: Contributor
timestamp: April 08, 2012, 02:47:25 pm
content: lol!I'll have to dig up my old Radio Electronics and Popular Electronics magazines.

author: G7PSK
author_rank: Super Contributor
timestamp: April 08, 2012, 06:08:17 pm
content: The first thing I ever built used an OA90 as the detector in a crystal set in about 1961 or there about had to wind the coils myself by hand.I have a copy of Practical Wireless dated 1929 that has lots of circuits that I would like to build one day using the methods described as far as possible. Not sure about the asbestos mat to put your soldering iron on after heating it in the open coal fire though. I guess we just dont know how easy we have it these days.My mistake that should be Amateur Wireless it is dated December 14 1929 and is already Vol.XV No. 392 I would love to find some earlier ones.

author: T4P
author_rank: Super Contributor
timestamp: April 08, 2012, 08:38:29 pm
content: "Soft" clippers as they are called in guitar pedals .They are praised for their "softness"Come on , they have such massive temp coeff .

author: SeanB
author_rank: Super Contributor
timestamp: April 09, 2012, 01:32:12 pm
content: I remember in the old Motorola Data books they had a massive Germanium transistor selection in the 1970's with thousands of units. Biggest was a 60A transistor array, 60A with a off voltage of 40 - 60V depending on selection, and a gain of around 3 at 60A. Came as a ready to use heatsink angle with the transistors ( a pair of TO3 units) mounted on it with the ballasting resistors, and solder terminals for the wiring.

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: April 10, 2012, 08:28:15 am
content: Got a whole pack of 1N34A sitting here; used them for crystal radio sets.

author: sacherjj
author_rank: Frequent Contributor
timestamp: April 10, 2012, 04:52:54 pm
content: I use the 1N34A along with a paint can and a bunch of 2 W resistors and a capacitor to have a 50 ohm dummy load that tells you the power transmitted.