RTTY

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### Autostart Ratios and Component Values

Source: https://rtty.com/development/tu/st-6/st-6.htm

Table detailing autostart ratios, duty cycles, and corresponding resistor values (R61, R59, R60) and ON/OFF times for the ST-6.

```text
Ratio	Duty	R61	R59	R60	ON	OFF
2:1	67%	5.1	390	4.7K	1.8	.88
3:1	75%	3.6	2.4K	4.7K	2.84	.84
```

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### Calculate Combinations for Five-Unit Codes

Source: https://rtty.com/England/fiveunits.htm

Demonstrates the calculation for the number of possible combinations in a five-unit code system.

```text
ie 2 x 2 x 2 x 2 x 2 = 32
```

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