[Milsurplus] G11 Diode

[Peter Gottlieb]

If that's the specs they were working with then certainly a standard 1N4002-7 
should easily substitute!


On 12/3/2017 3:07 AM, Jim Whartenby wrote:
> Ray
> Nick England shows some photos of a USM-26A aka FR-38B/U at
> http://www.virhistory.com/navy/test.htm
> Looks like CR203 through CR208 are 1N451 which is a Germanium diode with a PIV 
> of 170 volts, leakage of 150uA @ 150 volts and a peak forward current of 500 
> mA.  Vf is 1 volt so one assumes that a silicon diode of similar PIV specs can 
> easily replace it.
> Qbus?
> Jim
>
>
>
> --------------------------------------------------------------------------------
> *From:* Ray Fantini <RAFANTINI at salisbury.edu>
> *To:* "mrca at mailman.qth.net" <MRCA at mailman.qth.net>; Military Surplus Mail 
> List <milsurplus at mailman.qth.net>
> *Sent:* Saturday, December 2, 2017 11:25 AM
> *Subject:* [Milsurplus] G11 Dioede
>
> Ok so working on this FR38B/U frequency counter and running into an issue. 
> They use lots of early Germanium diodes to trigger and provide faster 
> switching times in most of the vacuum tube stages. They have a part number of 
> 212-G11A but I have not been able to find any information on them. Was 
> thinking of replacing a lot of the week performing ones with 1N914 switching 
> diodes but am a little concerned about voltage ratingbut have to assume that 
> the late fifties first generation G11 has to be a lower voltage ratting then a 
> modern silicone diode?
> There is a panel that originally had a dozen diodes as spares in the unit but 
> someone stole or used those years ago. They must have been a high failure rate 
> device.
>
> Ray F/KA3EKH
>
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