[Repeater-Builder] Hamtronics exciter

[scomind]

Hi Kevin,   Wanted to get back to you about a discontinued thread. You wrote:       Hamtronics mentions in their manual for the TA-51 (a little PM exciter they have built and sold for years) that a full 5 kc of deviation *may not* be possible without distortion because the multiplication factor is only 4 times with their 6 meter exciter.  (Read page 7 of the following manual): http://www.hamtronics.com/pdf/inst%20manuals/TA51.pdf     Virgil mentioned that he had looked at the manual and noted that the TA-51 uses RC phase modulation. A-ha! The light went on. You can only get 90 degrees of phase shift max with an RC circuit. Had they used an LC phase modulator, they would have gotten 180 degrees max. That's why the deviation is low with that unit. They don't have much deviation to start with, and as you say, if it isn't multiplied a lot, it'll be low at the final freq.   73, Bob Yahoo! Groups Links To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/   To unsubscribe from this group, send an email to: [EMAIL PROTECTED]   Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.