[Milsurplus] 1N21's and 1N23's

[J. Forster]

Mixup resolved.  Ray was describing the reversible polarity versions,
which can have the base part swapped to either end to make the unit
vanilla or reversed polarity type.

The reversible type don't usually have a whisker adjusting screw.

Best,
-John

============


> I have never touched the setscrew on one of these and just assumed it was
> whisker tension adjustment.  Although the body of the double-ended pin
> style
> diode housing is indeed the same size as the body of the set screw type, I
> don't see how the end screw could clamp on a buried pin.  Besides the
> set-screw style diodes I have all used glyptol to lock the screw in place.
> That tells me that the depth setting was critical which in turn implies
> whisker tension.  Maybe someone out there has a bad set screw diode and
> could answer this question once and for all.
>
>
> Dennis AE6C
>
> On Tue, Dec 15, 2009 at 12:10 PM, J. Forster <jfor at quik.com> wrote:
>
>> Hi Ray,
>>
>> I don't understand this:
>>
>> "If you loosen the set screw on one
>> > end they just become a pin on Bothe sides don't they?"
>>
>> I think the "whisker" is attached to the screw. If you loosen it, you
>> get
>> an open circuit. If you screw it down too far, a short.
>>
>> -John
>>
>> ===============
>>
>>
>>
>>
>> > Almost all the older series Harris FM broadcast transmitters used that
>> > style diode in the reflectometer for sensing forward and reflected
>> power.
>> > I have two FM-10 K series 10kW transmitters and one RCA 3 kW
>> transmitters
>> > as standby transmitters that still use them, think the HT-20 20 kW
>> also
>> > uses them too. The design allows them to easily be changed in the
>> event
>> of
>> > damage although I have never had one fail, don't know if it's the same
>> > number but definitely the same design, If you loosen the set screw on
>> one
>> > end they just become a pin on Bothe sides don't they?
>> > Ray Fantini KA3EKH
>>
>>
>>
>