TAPR is pleased to announce that the TADD-3 PPS distribution amplifier kit is now available.
The TADD-3's primary use is to distribute 1 pulse-per-second signals such as those obtained from GPS timing receivers, but it can work with pulse signals up to at least 10MHz. The TADD-3 provides six low-impedance outputs that deliver greater than 3.5 volts into a 50 ohm load, with rise time at the output connector of less than 3ns. It also has two RS-232 level outputs that can be used to feed computer timing applications. The polarity (normal or inverted) of each output can be independently set. These outputs can be driven from one or two inputs (i.e., each input can drive half the outputs, or a single input can drive all outputs). The input circuit can accept either TTL/CMOS level signals, or signals at other levels through the use of high speed comparators with adjustable trigger points. The inputs can be terminated in 50 ohms, 4.7 kilohms, or 1 megohm. The TADD-3 has the same form factor as the TADD-1 RF Distribution Amplifier. It has an onboard LM7805 regulator and operates from 7-15 VDC. Current drain at 13.8 volts ranges from 70 to 250ma depending on load and duty cycle. The TADD-3 kit is priced at $69, with a discounted price for TAPR members of $62. TAPR is taking orders for the TADD-3 now. Details (and a link to the assembly manual) are available at http://www.tapr.org/kits_tadd-3.html. Orders will be shipped from the TAPR office starting shortly after May 21. Kits will also be available at the TAPR booth at the Dayton Hamvention. 73, John PS -- I'm also pleased to announce that TAPR will offer an enclosure that will hold any of the TADD projects. Price and availability date are TBA, but we hope to have these spiffy boxes available by early July. We'll post an announcement as soon as the details with our vendor are finalized. _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts