Forums :: NEW! Web Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives
Support This Site: Contributors :: Advertise


It is currently Nov Mon 29, 2021 1:45 pm


All times are UTC [ DST ]





Post New Topic Post Reply  [ 10 posts ] 
Author Message
 Post subject: ID this GE diode?
PostPosted: Sep Tue 21, 2021 7:59 am 
Member

Joined: Feb Thu 25, 2016 1:58 am
Posts: 63
Location: Los Angeles, CA
50+ year old GE diode. Numbers on it are 337699 and 939. Need to find specs.


Attachments:
IMG_3589.JPG
IMG_3589.JPG [ 249.62 KiB | Viewed 437 times ]
IMG_3591.JPG
IMG_3591.JPG [ 214.06 KiB | Viewed 437 times ]
Top
 Profile  
 
 Post subject: Re: ID this GE diode?
PostPosted: Sep Tue 21, 2021 12:41 pm 
Member
User avatar

Joined: Nov Wed 30, 2016 7:35 pm
Posts: 11285
Location: Sunbury, Ohio 43074
Why do you need to find the specs? If you can tell us what it came from, we can recommend a replacement. If you are trying to sell it, the postage will exceed its value.

_________________
Preserving the hist. of electronics, one boat anchor at a time! :)
https://www.bbtvtestequipment.com


Top
 Profile  
 
 Post subject: Re: ID this GE diode?
PostPosted: Sep Tue 21, 2021 2:03 pm 
Member

Joined: Jun Fri 19, 2009 6:34 pm
Posts: 11142
Location: Long Island NY
That's probably a "house number" part made for a specific customer or purpose. Since they never released it to the trade as a standard part the specs on it are slim to none. But it is what was known as a "top hat" which was a line of silicon power rectifiers, standard recovery, typically low to moderate voltage, and low to modest current (under a few amperes anyway).

_________________
"Hell, there are no rules here--we're trying to accomplish something!"

Thomas A. Edison


Top
 Profile  
 
 Post subject: Re: ID this GE diode?
PostPosted: Sep Tue 21, 2021 5:14 pm 
Member

Joined: May Tue 30, 2006 4:46 pm
Posts: 11015
Location: Santa Rosa, CA
939 is probably a date code. This one is old enough that it could be the 39th week of 1959. The other number is a proprietary p/n.

Top hats were usually rated at less than an amp. If you need to replace it, use a 1N4007. If you want more margin, try a 1N5408.

I would not install that diode in any equipment that I valued.

Rich


Top
 Profile  
 
 Post subject: Re: ID this GE diode?
PostPosted: Sep Tue 21, 2021 5:31 pm 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 3791
Location: Seattle WA US
Zener diodes also came in that package.......
-Chuck


Top
 Profile  
 
 Post subject: Re: ID this GE diode?
PostPosted: Sep Tue 21, 2021 7:32 pm 
Member

Joined: Jun Sun 15, 2014 5:37 pm
Posts: 1481
Location: Montreal, Quebec
And there was a recent thread about top hat diodes.


Top
 Profile  
 
 Post subject: Re: ID this GE diode?
PostPosted: Sep Wed 22, 2021 4:31 am 
Member

Joined: May Tue 30, 2006 4:46 pm
Posts: 11015
Location: Santa Rosa, CA
Quote:
Zener diodes also came in that package.......


I don't recall that GE ever made Zener diodes.

Rich


Top
 Profile  
 
 Post subject: Re: ID this GE diode?
PostPosted: Sep Wed 22, 2021 10:14 pm 
Member

Joined: Feb Thu 25, 2016 1:58 am
Posts: 63
Location: Los Angeles, CA
Barry H Bennett wrote:
Why do you need to find the specs? If you can tell us what it came from, we can recommend a replacement. If you are trying to sell it, the postage will exceed its value.

Neither. I have a box with dozens of old diodes and most are labeled 1N*** or if small, color coded rings. I know what the date codes are, but just wondered what the numbering on these meant.


Top
 Profile  
 
 Post subject: Re: ID this GE diode?
PostPosted: Sep Wed 22, 2021 10:32 pm 
Member

Joined: Jun Sun 15, 2014 5:37 pm
Posts: 1481
Location: Montreal, Quebec
When top hat diodes came up some months ago, we said that they were relatively low current despite the size, and probably aren't worth using. They think I threw mine out years ago, and I'm a real scrounger.


Top
 Profile  
 
 Post subject: Re: ID this GE diode?
PostPosted: Sep Thu 23, 2021 12:18 am 
Member
User avatar

Joined: Nov Wed 30, 2016 7:35 pm
Posts: 11285
Location: Sunbury, Ohio 43074
DrBruin wrote:
Barry H Bennett wrote:
Why do you need to find the specs? If you can tell us what it came from, we can recommend a replacement. If you are trying to sell it, the postage will exceed its value.

Neither. I have a box with dozens of old diodes and most are labeled 1N*** or if small, color coded rings. I know what the date codes are, but just wondered what the numbering on these meant.


The 1Nxxx number is the actual diode part number, and you can probably look them up by just pasting that number into Google. The rest are either house numbers, date codes etc ..

_________________
Preserving the hist. of electronics, one boat anchor at a time! :)
https://www.bbtvtestequipment.com


Top
 Profile  
 
Post New Topic Post Reply  [ 10 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 12 guests



Search for:
Jump to:  




































Privacy Policy :: Powered by phpBB