Many thanks Randy -----and all other commenters-- My mystery is solved----amazing the knowledge that lurks within this group and all that it took on my part was to ask for a little of it. After I sent my milliseconds comment, I got to thinking in microseconds----whereas a total delay of about a second seemed impossible in the box size, a total delay of about a millisecond in 100 microsecond steps sounded within the realm of possibility---and that is what is is. I'll put the instruments on it to see the performance they achieved 40 years ago when I think it was built---(7109 date code on the box).
Now, a quick follow on question. If the delay box is used to match the data arrival from two simulcasting transmitters, call them A & B, to a point C, what happens to the match when point C moves? It seems to me that if point C is a moving target, that adequate match could easily be lost anyway. Guess I need to study up on simulcast system design. Thanks again-- Scott ----- Original Message ----- From: Randy Fisher To: Repeater-Builder@yahoogroups.com Sent: Monday, June 28, 2010 5:39 PM Subject: RE: [Repeater-Builder] Motorola Mystery Box This is a 600 Ohm Delay line used in setting audio delay's on Simulcast paging systems. The delay is in micro seconds. I have used several of these on an old Ameritech 158.100 paging system. This unit goes between the Link receiver or a leased audio telephone line, you set the delay by soldering to the correct post. I hope this helps, Randy WB9VLE From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Scott Overstreet Sent: Monday, June 28, 2010 2:57 PM To: Repeater-Builder@yahoogroups.com Cc: Scott Overstreet Subject: [Repeater-Builder] Motorola Mystery Box Hello All-- In answer to Ted, Eric and others---Yes, I guess it could be a taped delay line --but at telephone audio? I'm saying telephone because of the telco wire attached----What do you think the numbers might be?---milli-seconds? ----seems like that would take a lot of network but then there is a fair amount of space in the box but that would probably add up to a lot of attenuation. First, see the pictures--- as you can see, the box is metal and soldered and the connections are as it came to me. Since my first message, I have ask some questions----it seems that it came this way with a junked 65Mcs Micor that had been in paging ervice -----that's all I know and I'm still mystified-----what is it and what was it used for? Maybe its time to make some bench measurements. Many thanks, Scott
