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Table of Actual Measurements, Machine Cuts, and Measured VSWR Results

After Brazing, the .279 and .145 are measured
Per note 4 on drawing SA-341-341-12, clean up cuts are made to finish surfaces so that the window can be measured in the cold test fixture. The clean-up cuts are a maximum of .005 on each of the two surfaces. This became known as "the square-up cut" as noted in the table below (after window #20).
The before and after parallelism is shown in the figure below.

The VSWR was measured and the frequency tuned by the second cut at an assumed value of 25 MHz/mil. The actual tuning rates are shown in the histogram below. (Material was removed from the side opposite the copper. In only a few instances at the beginning, was material removed from the copper side after the square-up cut.)
The table below is also available as an excel file. Cuts.xls

vac side to ceramic

air side to ceramic

height of ring

.279 ref

.145 ref

1.134 ref

Ring Diam

calc.

ceramic T

measured

amount to

remove

win#

operation

min

max

//.002

min

max

//.002

min

max

? height

Freq

VSWR

as brazed

1.094

477.25

2	as brazed	1.101	480.5
2	after cut #1	1.0285	478.5
2	after cut #2	0.971	477

as brazed

1.0724

477

3	as brazed	1.09	479.75
3	after cut #1	1.067	479.5
3	after cut #2	1.0263	478.5
3	after cut #3	0.9063	476

9	as brazed	0.2760	0.2790	0.0030	0.1430	0.1470	0.0040	1.1380	1.1410	0.7170	479.75	0.09
9	after cut #1							1.0500			477.75	0.03
9	after cut #2							1.0200			476.5		27.542	MHz/in
9	at 476

10	as brazed	0.2764	0.2725	-0.0039	0.1453	0.1448	-0.0005	1.1376	1.1383	0.7185
10	aft sq up							1.129			479	0.1
10	after cut #1							1.029			476.5
10	at 476

11	as brazed	0.2770	0.2800	0.0030	0.1410	0.1490	0.0080	1.1410	1.1430	0.7185	478.5	0.11
11	after cut #1							1.0310			476
11	at 476

12	as brazed	0.2825	0.2854	0.0029	0.1386	0.144	0.0054	1.1395	1.1427	0.7159	478	0.06
12	after cut #1							1.076			476.5
12	at 476

14	as brazed	0.2850	0.2880	0.0030	0.1387	0.1455	0.0068	1.1430	1.1442	0.7150	477.75	0.07
14	after cut #1							1.0740			476
14	at 476

15	as brazed	0.276	0.147	1.141	0.7180	479
15	after cut #1
15	at 476

16	as brazed	0.2755		0.1478	1.1411	1.1434	0.7190	479.5	1.014
16	after cut #2	0.132	0.1435
16	at 476							476	1.022	24.39	MHz/in

17	as brazed	0.2791	0.1487	1.142	1.1428	0.7146	479
17	after cut #1
17	at 476

18	as brazed	0.2731	0.1468	1.138	1.141	0.7196	481.5
18	after cut #1
18	at 476

20	as brazed	0.2858	0.0074	0.1589	0.0065	1.1386	0.6939
20	aft sq up
20	after cut #1
20	at 476

21	as brazed	0.2670	0.2810	0.0140	0.1400	0.1450	0.0150	1.1415
21	aft cut 0	0.2622		0.0005	0.1385		0.0014	1.1167	0.0248	0.7160	478.5	0.100
21	after cut #1										476.5
21	at 476

22	as brazed	0.2530	0.0087	0.1543	0.0074	1.1380	0.7307
22	aft sq up	0.2420		0.1443		1.1170	0.7307	479
22	after cut #1
22	at 476

23	as brazed	0.2950	0.0050	0.1460	0.0040	1.1470
23	aft sq up	0.2801	0.0007	0.1345	0.0009	1.1148	0.0322	0.7002	483	0.280
23	after cut #1
23	at 476

24	as brazed	0.2680	0.2750	0.0090	0.1450	0.1530	0.0080	1.1500	1.1418
24	aft sq up	0.2641		0.0001	0.1411		0.0014	1.1233		0.0267	0.7181	479	0.120
24	after cut #1	0.1434			0.1419			1.0030				476		24.855	MHz/in WITH SQUARE UP
24	at 476

25	as brazed	0.2680	0.2780	0.0100	0.1450	0.1535	0.0100	1.1390	1.1440
25	aft sq up	0.2628		0.0002	0.1399		0.0025	1.1200		0.0190	0.7173	478	0.080
25	after cut #1	0.1836			0.1393			1.0420				476.5		18.939	MHz/in WITH SQUARE UP
25	at 476

26	as brazed	0.272	0.2761	0.0041	0.1413	0.1487	0.0074	1.1391	1.1412
26	aft sq up	0.2714	0.2714	0.0004	0.1378	0.1378	0.0023	1.125	1.125		0.7158	478.5		0.1
26	after cut #1	0.1704	0.1704	0.0014				1.0257	1.0257	0.0993		476.5	1.059		19.802	MHz/in WITH SQUARE UP
26	at 476											476	1.0621

27	as brazed	0.2693	0.2711	0.0018	0.1507	0.1449	0.0058	1.14
27	aft sq up	0.2691	0.2691	0.0009	0.1408	0.1408	0.0018	1.1286	1.1286		0.7187	477.75		0.07
27	after cut #1	0.1989	0.1989	0.001				1.0591	1.0591	0.0695	0	476	1.061		24.929	MHz/in WITH SQUARE UP
27	at 476												1.061

28	as brazed	0.2795	0.0094	0.1338	0.0121	1.1402
28	aft sq up	0.2614	0.0014	0.1365	0.002	1.1167	1.1167	0.7188	478.5	1.03	0.1
28	after cut #1	0.1614		0.1374					475.5	1.06		30	MHz/in WITH SQUARE UP
28	at 476								476	1.06

29	as brazed	0.2717	0.2766	0.0049	0.143	0.1473	0.0043	1.1382
29	aft sq up	0.2698	0.2698	0.0007	0.1367	0.1367	0.0018	1.1248	1.1248		0.7183	478	1.03	0.08
29	after cut #1	0.1898	0.1898	0.0004				1.0456	1.0456	0.0792		477	1.058		12.5	MHz/in WITH SQUARE UP
29	at 476											476	1.061

30	as brazed	0.2718	0.2751	0.0033	0.1441	0.1493	0.0052	1.138
30	aft sq up	0.2712	0.2712	0.0005	0.1382	0.1382	0.0011	1.127	1.127		0.7176	478		0.08
30	after cut #1	0.1913	0.1913	0.001				1.0491	1.0491	0.0779		477	1.0566		12.516	MHz/in WITH SQUARE UP
30	at 476											476	1.0615

31	as brazed	0.2783	0.2643	0.0144	0.141	0.1534	0.0127	1.1419
31	aft sq up	0.2605	0.2605	0.001	0.1347	0.1347	0.0015	1.1132	1.1132	0.7180	478.5	1.032	0.1
31	after cut #1	0.1597			0.136						476	1.0623		24.802	MHz/in WITH SQUARE UP
31	at 476											1.0623

32	as brazed	0.2751	0.0017	0.145	0.0044	1.1362
32	aft sq up	0.2703		0.1407		1.1302	478.25	1.0549	0.09
32	after cut #1	0.1804		0.141		1.0411	476.5	1		19.466	MHz/in WITH SQUARE UP
32	at 476							1.01

33	as brazed	0.2701	0.0028	0.1513	0.006	1.1395
33	aft sq up	0.2622		0.1398		1.1193	478.25	1.033	0.090
33	after cut #1	0.1725		0.1399		1.031	475.75	1.06
33	at 476						476	1.06

34	as brazed	0.2756	0.0029	0.145	0.0055	1.1416	11.564	479	1.02
34	aft sq up	0.2695	0.0007	0.1395	0.0011	1.1253	9.7515	479	1.02	0.120		5/9/97
34	after cut #1	0.1503		0.1407		1.0076	11.569	475.75	1.032		25.938	MHz/in WITH SQUARE UP
34	at 476						9.7579	476	1.0325

35	as brazed	0.2714	0.0075	0.1499	0.0072	1.1391	11.564	479	1.015
35	aft sq up	0.2629		0.1389		1.1214	9.7512
35	after cut #1	0.1509		0.1393		1.008		475.75	1.033	26.971	MHz/in WITH SQUARE UP
35	at 476							476	1.034

36	as brazed
36	aft sq up
36	after cut #1
36	at 476

37	as brazed
37	aft sq up
37	after cut #1
37	at 476

38	as brazed	0.2679		0.0011	0.143	0.0024	1.1394		479	1.014	0.120
38	aft sq up		0.148					1.019
38	after cut #1	0.1511		0.0002			1.0196		475	1.045		34.247	MHz/in with no "square-up"
38	at 476								476	1.0511

39	as brazed	0.2746		0.0016	0.1479	0.0053	1.1417	11.565			0.1083	@30MHz/in
39	aft sq up	0.2672			0.1402			9.7502	479.25	1.01	0.130	@25MHz/in
39	after cut #1	0.160	0.159		0.1415				476.25	1.0153		27.855	MHz/in WITH SQUARE UP
39	at 476									1.0167		PERFECT!!!!!

40	as brazed	0.2759		0.0018	0.1483	0.0014	1.1446		480.25	1.01	0.170
40	aft sq up		0.106					0.975				WILL CUT TO .150 FOR FIRST CUT
40	after cut #1	0.1477		0.0006			1.0178		476.25	1.027		31.201	MHz/in with no "square-up"
40	at 476								476	1.028

41	as brazed	0.2764		0.0021	0.148	0.0095	1.1418	11.565			0.125	@30MHz/in
41	aft sq up	0.2685			0.1402			9.7526	479.75	1.01	0.150	@25MHz/in
41	after cut #1	0.145	0.144		0.1416				476	1.011		30.364	MHz/in WITH SQUARE UP
41	at 476									1.013		PERFECT!!!!!

42	as brazed	0.2844	0.0027	0.1416	0.0157	1.1412
42	aft sq up
42	after cut #1
42	at 476

as brazed

0.2731

0.0049

0.1501

0.0013

480

1.023

0.1333

@30MHz/in

aft sq up

0.1381

480

1.023

0.160

@25MHz/in

after cut #1

0.1379

0.1468

477

1.0344

at 476

476

1.0428

44	as brazed	0.267		0.0018	0.1502	0.0154	1.138
44	aft sq up	0.2607			0.1366	0.0002	1.1163		478.25	1.003	0.090
44	after cut #1	0.1772	0.09		0.1379		1.0337	1.0263	477	1.0107		26.946	MHz/in WITH SQUARE UP
44	at 476									1.023		NEARLY PERFECT

45	as brazed
45	aft sq up
45	after cut #1
45	at 476

46	as brazed	0.2701		0.0188	0.1504	0.0004	11.564			0.0917	@30MHz/in
46	aft sq up	0.2646		0.0002	0.1308	0.0025	9.752	478.75	1.034	0.110	@25MHz/in
46	after cut #1	0.175	0.1729		0.1323			476.25	1.013		27.902	MHz/in
46	at 476							476	1.014		PERFECT!!!!!

47	as brazed
47	aft sq up
47	after cut #1
47	at 476

48	as brazed	0.2713		0.0067	0.152	0.0009	479.5	1.0286	0.1167	@30MHz/in
48	aft sq up	0.2713	0.1546				479.5	1.0286	0.140	@25MHz/in
48	after cut #1	0.1539			0.1555		476.25	1.0336		27.683
48	at 476						476	1.0352		PERFECT!!!!!

49	as brazed	0.2726		0.005	0.1475	0.0009	11.564	479.25	1.022	0.1083	@30MHz/in
49	aft sq up	0.2726	0.1643				9.7529	479.25	1.022	0.130	@25MHz/in
49	after cut #1	0.1634			0.1531			476.25	1.0331		27.473
49	at 476							476	1.0342		PERFECT!!!!!

50	as brazed
50	aft sq up
50	after cut #1
50	at 476