[sdiy] Measering KTY81-110
HA.Synth at t-online.de
HA.Synth at t-online.de
Thu May 25 09:09:23 CEST 2006
Hi,
I have measured some KTY181-110. I soldered them on banana jackets put cables
in and let them hangout of my (Kitchen) ofen (My wife was out that evening).
I hang them in the middle of the ofen as close together as possible to be
shure that they have the same temperature. I als added an digital temp sensor
to measure the temp. I started to warm them up in 5C steps. Doesn't work!
Never trust the temp display of your kitchenofen! So I go: heating all up at
60C for about 20 minutes to keep all warm. Turn the ofen of and started
measuring and waiting for the temp to go down. And waiting and waiting...
Tooks about 3hours to go down from 55C to 28 C. 17,5 and 19,5C was taken in
my room. Guess where I measured the -18C?
I can not guarantie for the absolut temp. It shoud bo within +<0,5C. But I a
mpretty shure that all parts had teh same Temp when measuring
Here wat i got deg in C R in Ohm
c 1 2 3 4 5
-18 7447 ----- ----- ----- -----
17,5 9717 9770 9773 9778 9729
19, 5 9888 9905 9881 9865 9851
28 10438 10445 10427 10415 10387
32,5 10730 10757 10739 10714 10683
34,5 10901 10929 10908 10885 10852
38 11219 11249 11228 11202 11169
41 11452 11481 11461 11436 11399
43,5 11702 11723 11691 11683 11647
46,5 11920 11992 11955 11944 11905
50 12347 12365 12314 12299 12261
55 12851 12870 12815 12785 12735
So, now any cracks out there in the list to interpret that raw data?
Does anyone do the same with tempcos?
I have none yet so I can't do it. If anyone lent me some i can repeat the
measuring. I'll send them back when I'm done.
Harald
More information about the Synth-diy
mailing list