See www.iol.ie/~bravo/r7_vertical.htm if link fails, do search for EI7BA. This site has R5 & R7 schematics. That will be close for your R4. Good luck, Jim Miller, K4SQR http://www.comteksystems.com 4-Square Experts, Stack Yagi & Remote Antenna Switching Systems On 2003年5月29日 07:29:10 +0300 Tsachy L <[email protected]> writes: > Hello group > I'm looking for schema \ details of the R4's matching unit > ("black-box"), > and the user manual. > Can anyone point me to a link? > Thanks in advance, Isaac, 4Z4TL > http://www.iarc.org/~4z4tl/ > [email protected] [email protected] >>> - - - >> Your moderator for this list is: > Larry Wilson KE1HZ [email protected] > _______________________________________________ > Antennas mailing list > [email protected] > http://mailman.qth.net/mailman/listinfo/antennas >>