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ZL1ABS > TECH 05.07.09 10:27l 44 Lines 738 Bytes #999 (0) @ WW
BID : 793090ZL1ABS
Read: GUEST
Subj: 600 Ohm Attenuators
Path: IZ3LSV<IK2XDE<DB0RES<DK0WUE<7M3TJZ<ZL2BAU<ZL1AB
Sent: 090705/0817Z @:ZL1AB.#06.NZL.OC #:31009 [AUCKLAND] FBB7.00i $:793090ZL1AB
From: ZL1ABS@ZL1AB.#06.NZL.OC
To : TECH@WW
600 Ohm Attenuator Pad values
typed by Michael Sheffield ZL1ABS
dB R1 R2
1 10k 30 Ohms
2 5.1k 68 Ohms
3 3.3k 100 Ohms
4 2.7k 150 Ohms
5 2.2k 180 Ohms
6 1.8k 220 Ohms
7 1.5k 270 Ohms
8 1.3k 300 Ohms
9 1.2k 360 Ohms
10 1.1k 430 Ohms
11 1.1k 510 Ohms
12 1k 560 Ohms
12 910 Ohms 510 Ohms
13 910 Ohms 620 Ohms
14 910 Ohms 750 Ohms
15 820 Ohms 750 Ohms
16 820 Ohms 910 Ohms
17 750 Ohms 910 Ohms
18 750 Ohms 1.1k
19 750 Ohms 1.3k
20 750 Ohms 1.5k
21 750 Ohms 1.8k
22 680 Ohms 1.8k
23 680 Ohms 2.2k
The above is for a 600 Ohm impedance balenced PI attenuator.
R1 is the shunt arm at each end
R2 is the series arm in each leg
73 - Michael, ZL1ABS @ ZL1AB
Message timed: 20:15 on 2009-Jul-05
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