Hey Chuck..... what does this mean.... "All
stabilized at room temperature for measurement."
On 12/16/2019 09:27 AM, Chuck Carpenter
wrote:
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For my own
amazement, measured for comparison two diodes, MVAM109 and BB910.
A schematic of the N5IB design?test fixture** is attached. All
stabilized at room temperature for measurement.
?????????????? Capacitance, pF
V??????? MVAM
109????? BB910
0?????????
750????????????????? 52
1?????????
481????????????????? 35
2?????????
340????????????????? 27
3????????? 234???????????????
22
4?????????
152????????????????? 17
5?????????
100????????????????? 13
6?????????
66??????????????????? 9
7????????
45??????????????????? 7
8????????
33??????????????????? 6
9????????
27????????????????????5.9
10?????? 23????????????????
5.73
11??????
21?????????????????? 5.59
12??????
20?????????????????? 5.45
Highest voltage available from the battery.
The capacitance range of the BB910 is similar to the 60 pF section
of a polycon often used with HF?VXOs. The MV-209 has a comparable
C range.
** N5IB produced a kit of the fixture, since retired.? Fairly easy
to build one from?parts on-hand.
--
Chuck, W5USJ (ex K2OFN)
Point, Rains Co, TX? EM22cv
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