Hi Dave, Many of these type of delay lines use passive L-C & R networks which do not require power. Some are just common phase shift networks.
A true voice (with sub tone) two-way radio system will probably have dual delay lines, one for the sub tone, one for the voice audio (if it's done right). The unit for voice is often a different type than the sub tone delay line, which are fed independant of each other. Possibly your unit was used for tone and voice paging on low band. The delay line probably has a modest limited usefull bandwidth and might not deal well (if at all) with dpls. The dials are the delay times in micro or milli seconds, these appear to be average time delays. Wouldn't mind having one or two if you want to sell one or two reasonable. I have a paging system in service that uses them. cheers Skipp025 at yahoo.com > "Dave Stephens" <[EMAIL PROTECTED]> wrote: > Hello all, > I got a Micor Lo-Band Paging transmitter and I found an interesting item within. It is a delay line made by Allen Avionics. below are links to the front and back images I took of it. > > http://www.angelfire.com/ca3/thebasement/images/delayfront.jpg > http://www.angelfire.com/ca3/thebasement/images/delayback.jpg > > what I want to know is (because I have now manuals on this micor) how does it work? all I see is an audio in and an audio out on the thing. there are no power connections. and the thing is completely sealed. > > Is the power fed in with the audio lines? > > Dave Stephens > KF6WJA > Santa Clarita Amateur Radio Club > www.W6JW.org > Vice-President - Webmaster - Newsletter Editor 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: http://docs.yahoo.com/info/terms/
