Sunday, April 19, 2015

xtal filter making part 3

This is the third part of xtal filter making.
After making the R7 Dayton receiver my confidence grew. This pcb was gifted by VU2UPX. Thanks charu. This whole experience opened my blocks for the filters..From lamington road I, recently  bought few 10 Mhz. xtals costing around rs300/- for 30 pieces.  How to measure ! Just see the part-1 and part-2.

srno
xtal
open
close
diff




12
24
999950
999634
316




17
2
999948
999640
308
6
ao
14
3
999957
999641
316
1
a
15
18
999953
999644
309
3
a
6
8
999965
999644
321
0


21
17
999958
999645
313
1
a
18
7
999959
999645
314
0
a
19
23
999949
999648
301
3


2
20
999955
999650
305
2
bo
8
11
999961
999651
310
1
b
22
6
999964
999651
313
0
b
5
12
999956
999653
303
2
b
20
25
999959
999653
306
0


27
22
999953
999654
299
1
c
11
10
999959
999654
305
0
c
29
27
999960
999654
306
0
c
13
16
999965
999654
311
0
c
3
21
999960
999655
305
1
c
25
14
999965
999658
307
3


9
13
999964
999661
303
3


26
26
999973
999665
308
4


7
1
999960
999666
294
1
do
10
15
999960
999670
290
4
d
4
4
999963
999670
293
0
d
24
19
999964
999670
294
0
d
16
0
999970
999673
297
3


28
28
999979
999673
306
0


23
5
999978
999680
298
7


1
9
999967
999696
271
16




Well I can get only 2 set of 4 xtals and 2 set of 3xtals. a, b, c, d denotes the selected filter. a0 denotes the oscillator.


OK. I am happy. If I have bought the 100xtals beg of KDS xtal than it might have yielded me good results.
Happy filtering.