Hi Allan,
Here are some old runs from my Pi-L Basic program at 1000 ohms plate
impedance which should be just about right for a pair of those tubes.
This program shows all the extremes at the band edges and output loads so
that components may be juduciously selected.
Note that the lower Q chosen for the second two runs maintains the plate C
under 500pF on 160.
If you want to run some of your own numbers, a listing of the program is on
my webpage at:
http://wc6w.50webs.com/wc6wamps/index.html?fr61.html
73 & G'day!
Marv WC6W
http://wc6w.50webs.com/
************************** Q of 12 or so ***************************
1000 ohm to 52 ohm PI-L Network
FREQ Pi-Q C1 pF L1 uH C2 pF L2 uH Mid Z
1.8 12.7 773 14.46 2367 8.07 212
2 12 641 14.46 1874 8.07 250
3.5 12.9 406 7.23 1260 4.03 203
4 12 320 7.23 937 4.03 250
5.4 12 237 5.35 694 2.99 250
7.15 12 179 4.04 524 2.25 250
10 12 128 2.89 374 1.61 250
14.15 12 90 2.04 264 1.14 250
18.15 13 79 1.36 249 .76 197
21.2 12 60 1.36 176 .76 250
24.85 13.2 59 .97 187 .54 190
28 12.4 47 .97 143 .54 227
29.7 12 43 .97 126 .54 250
50 12.5 27 .53 82 .29 221
54 12 23 .53 69 .29 250
1000 ohm to 25 ohm PI-L Network
FREQ Pi-Q C1 pF L1 uH C2 pF L2 uH Mid Z
1.8 15.3 851 14.46 2309 8.07 358
2 14.9 715 14.46 1813 8.07 436
3.5 15.5 446 7.23 1231 4.03 340
4 14.9 357 7.23 906 4.03 436
5.4 14.9 265 5.35 671 2.99 436
7.15 14.9 200 4.04 507 2.25 436
10 14.9 143 2.89 362 1.61 436
14.15 14.9 101 2.04 256 1.14 436
18.15 15.6 87 1.36 244 .76 326
21.2 14.9 67 1.36 171 .76 436
24.85 15.7 64 .97 183 .54 313
28 15.1 53 .97 139 .54 391
29.7 14.9 48 .97 122 .54 436
50 15.2 30 .53 80 .29 378
54 14.9 26 .53 67 .29 436
1000 ohm to 100 ohm PI-L Network
FREQ Pi-Q C1 pF L1 uH C2 pF L2 uH Mid Z
1.8 12.1 754 14.46 2146 8.07 183
2 11.2 618 14.46 1724 8.07 202
3.5 12.3 397 7.23 1137 4.03 178
4 11.2 309 7.23 862 4.03 202
5.4 11.2 228 5.35 638 2.99 202
7.15 11.2 172 4.04 482 2.25 202
10 11.2 123 2.89 344 1.61 202
14.15 11.2 87 2.04 243 1.14 202
18.15 12.5 78 1.36 224 .76 175
21.2 11.2 58 1.36 162 .76 202
24.85 12.8 58 .97 168 .54 172
28 11.7 46 .97 131 .54 191
29.7 11.2 41 .97 116 .54 202
50 11.8 26 .53 74 .29 188
54 11.2 22 .53 63 .29 202
******* Lower Q on the low bands, Higher on the high ones ********
1000 ohm to 52 ohm PI-L Network
FREQ Pi-Q C1 pF L1 uH C2 pF L2 uH Mid Z
1.8 7.4 460 23.4 1658 8.07 212
2 7 379 23.4 1329 8.07 250
3.5 8.6 274 10.44 956 4.03 203
4 8 215 10.44 719 4.03 250
5.4 12 237 5.35 694 2.99 250
7.15 12 179 4.04 524 2.25 250
10 12 128 2.89 374 1.61 250
14.15 12 90 2.04 264 1.14 250
18.15 13 79 1.36 249 .76 197
21.2 12 60 1.36 176 .76 250
24.85 13.2 59 .97 187 .54 190
28 15.4 59 .78 169 .54 227
29.7 15 53 .78 147 .54 250
50 17.7 38 .38 106 .29 221
54 17 33 .38 89 .29 250
1000 ohm to 25 ohm PI-L Network
FREQ Pi-Q C1 pF L1 uH C2 pF L2 uH Mid Z
1.8 9.2 513 23.4 1735 8.07 358
2 8.9 430 23.4 1376 8.07 436
3.5 10.5 303 10.44 984 4.03 340
4 10.1 243 10.44 731 4.03 436
5.4 14.9 265 5.35 671 2.99 436
7.15 14.9 200 4.04 507 2.25 436
10 14.9 143 2.89 362 1.61 436
14.15 14.9 101 2.04 256 1.14 436
18.15 15.6 87 1.36 244 .76 326
21.2 14.9 67 1.36 171 .76 436
24.85 15.7 64 .97 183 .54 313
28 18.8 66 .78 160 .54 391
29.7 18.5 59 .78 139 .54 436
50 21.4 42 .38 100 .29 378
54 21 37 .38 83 .29 436
1000 ohm to 100 ohm PI-L Network
FREQ Pi-Q C1 pF L1 uH C2 pF L2 uH Mid Z
1.8 7 446 23.4 1387 8.07 183
2 6.4 362 23.4 1123 8.07 202
3.5 8.2 268 10.44 816 4.03 178
4 7.4 206 10.44 623 4.03 202
5.4 11.2 228 5.35 638 2.99 202
7.15 11.2 172 4.04 482 2.25 202
10 11.2 123 2.89 344 1.61 202
14.15 11.2 87 2.04 243 1.14 202
18.15 12.5 78 1.36 224 .76 175
21.2 11.2 58 1.36 162 .76 202
24.85 12.8 58 .97 168 .54 172
28 14.6 58 .78 158 .54 191
29.7 14 51 .78 139 .54 202
50 16.8 37 .38 100 .29 188
54 15.8 32 .38 85 .29 202
*********** Low Q all the way *********************
1000 ohm to 52 ohm PI-L Network
FREQ Pi-Q C1 pF LP uH C2 pF LL uH Mid Z
1.8 7.4 460 23.4 1658 8.07 212
2 7 379 23.4 1329 8.07 250
3.5 7.6 242 11.7 879 4.03 203
4 7 189 11.7 664 4.03 250
5.4 8 159 7.74 533 2.99 250
7.15 8 120 5.84 402 2.25 250
10 8 86 4.17 287 1.61 250
14.15 8 61 2.95 203 1.14 250
18.15 8.7 53 1.97 189 .76 197
21.2 8 40 1.97 135 .76 250
24.85 8.9 40 1.4 141 .54 190
28 8.3 32 1.4 109 .54 227
29.7 8 29 1.4 96 .54 250
50 10.4 22 .63 72 .29 221
54 10 19 .63 61 .29 250
1000 ohm to 25 ohm PI-L Network
FREQ Pi-Q C1 pF LP uH C2 pF LL uH Mid Z
1.8 9.2 513 23.4 1735 8.07 358
2 8.9 430 23.4 1376 8.07 436
3.5 9.3 269 11.7 923 4.03 340
4 8.9 215 11.7 688 4.03 436
5.4 10.1 180 7.74 541 2.99 436
7.15 10.1 136 5.84 409 2.25 436
10 10.1 97 4.17 292 1.61 436
14.15 10.1 68 2.95 206 1.14 436
18.15 10.6 59 1.97 194 .76 326
21.2 10.1 45 1.97 138 .76 436
24.85 10.7 44 1.4 146 .54 313
28 10.3 36 1.4 112 .54 391
29.7 10.1 32 1.4 98 .54 436
50 12.8 25 .63 72 .29 378
54 12.5 22 .63 60 .29 436
1000 ohm to 100 ohm PI-L Network
FREQ Pi-Q C1 pF LP uH C2 pF LL uH Mid Z
1.8 7 446 23.4 1387 8.07 183
2 6.4 362 23.4 1123 8.07 202
3.5 7.2 236 11.7 734 4.03 178
4 6.4 181 11.7 561 4.03 202
5.4 7.4 153 7.74 461 2.99 202
7.15 7.4 115 5.84 348 2.25 202
10 7.4 82 4.17 249 1.61 202
14.15 7.4 58 2.95 176 1.14 202
18.15 8.4 52 1.97 160 .76 175
21.2 7.4 39 1.97 117 .76 202
24.85 8.5 39 1.4 120 .54 172
28 7.7 31 1.4 94 .54 191
29.7 7.4 27 1.4 83 .54 202
50 9.8 22 .63 64 .29 188
54 9.3 19 .63 55 .29 202
--- On Tue, 12/16/08, Allan Greening <vk3pa@vk3pa.com> wrote:
> From: Allan Greening <vk3pa@vk3pa.com>
> Subject: [Amps] 2-4CX100A amp
> To: amps@contesting.com
> Date: Tuesday, December 16, 2008, 1:44 PM
> Hi all, can someone give me the output (TANK) values for
> both Pi es Pi L
> for the tune /load cap's es coil inductance for 160m..
> iam using 2 off
> 4CX1000A @ 3Kv, Sc @ 325v in AB1 .. TU es best for
> Xmas/HNY.. 73 vk3pa
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
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