Optimizing Time Delay Page 1 of 1
Smartuner"! Tech Notes
Optimizing Time Delay Between Rx & Tx for Voice or Data Communication Modes
Increasing Delay Time Between Rx and Tx
The Smartuner software is optimized for high-speed data communications. Other applications may require longer delays between
receive and transmit. This can be accomplished with the following hardware modification.
Change the appropriate capacitor to the value determined by this formula: Delay Time = 10 mSec x each microFarad
Example: 22 microFarad would generate a delay of 220 mSec. (22 x 10 mSec = 220 mSec)
The capacitors for the different Smartuners are listed below:
SG-230* - C16
SG-231 - C73
SG-235 - C26
SG-237 - C2
SG-239 - C2
*C16 is applicable for all SG-230 couplers manufactured after December 1999.
This modification is normally made for high speed CW operations. When SGC does this modification, we install a 10 µF tantalum
or ceramic capacitor. Every Smartuner manual includes the schematics, so you can locate the correct capacitor position.
SGC Inc., 13737 SE 26th St., Bellevue, WA 98005 Tel: [phone] or 1-800-259-7331 Fax: [phone] Email: [e-mail]
SGC reserves the right to change specifications, release dates and price without notice.
http://www.sgcworld.com/timedelaytechnote.html 03.10.2007