[time-nuts] Fwd: TNS-BUF High Isolation, Low Noise Buffer Amp Available
We've received enough orders to go ahead with production on the TNS-BUF, so here's your last chance to join the cool kids -- we'll take orders at http://tapr.org/kits_tns-buf through tomorrow, Oct. 20. John Forwarded Message Subject: [time-nuts] TNS-BUF High Isolation, Low Noise Buffer Amp Available Date: Wed, 5 Oct 2016 10:15:46 -0400 I've previously mentioned a high performance buffer amplifier called the "TNS-BUF" that I built based on a design by Dr. Bruce Griffiths with further input from John Miles. Key numbers are: * Phase noise -140dBc/Hz at 1 Hertz offset, noise floor -175dBc/Hz. (PN plot attached) * Reverse isolation greater than 100dB; low enough that I can't make a trustworthy measurement. * Gain from -10 to +7 dB from 1 to 30 MHz; maximum output >18dBm. * Nominal 18VDC operation, but works down to 12V with lowered maximum output level. There's information, including performance data and schematic, at http://www.febo.com/pages/TNS-BUF There seems to be some interest in an amplifier like this, so TAPR has decided to do a limited production run. The amp is built with surface mount parts, so we thought an assembled and tested board was better than a kit. The price will be $119 each. But we have no idea how much interest there is, and we need to build a minimum of 25 units to make production feasible. So, here's the deal: you can order your TNS-BUF at http://tapr.org/kits_tns-buf through *October 20*. If we receive orders for at least 25 boards by then, we will charge credit cards and place the production order with our contract manufacturer. If we don't get 25 orders, we'll cancel the project and credit cards will not be charged. There's no guarantee that boards will be available for later order. We expect about 60 days between placing the manufacturing order and receipt of the boards at TAPR. We'll ship to customers ASAP after receipt. So that means you can expect to receive your order shortly after January 1. So, go to http://tapr.org/kits_tns-buf now to place your order before the deadline! John ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Fwd: TNS-BUF High Isolation, Low Noise Buffer Amp Available
Just a reminder that the deadline to order TNS-BUF isolation amps is next week -- October 20. John Forwarded Message Subject: [time-nuts] TNS-BUF High Isolation, Low Noise Buffer Amp Available Date: Wed, 5 Oct 2016 10:15:46 -0400 From: John Ackermann N8UR Reply-To: Discussion of precise time and frequency measurement To: Discussion of precise time and frequency measurement I've previously mentioned a high performance buffer amplifier called the "TNS-BUF" that I built based on a design by Dr. Bruce Griffiths with further input from John Miles. Key numbers are: * Phase noise -140dBc/Hz at 1 Hertz offset, noise floor -175dBc/Hz. (PN plot attached) * Reverse isolation greater than 100dB; low enough that I can't make a trustworthy measurement. * Gain from -10 to +7 dB from 1 to 30 MHz; maximum output >18dBm. * Nominal 18VDC operation, but works down to 12V with lowered maximum output level. There's information, including performance data and schematic, at http://www.febo.com/pages/TNS-BUF There seems to be some interest in an amplifier like this, so TAPR has decided to do a limited production run. The amp is built with surface mount parts, so we thought an assembled and tested board was better than a kit. The price will be $119 each. But we have no idea how much interest there is, and we need to build a minimum of 25 units to make production feasible. So, here's the deal: you can order your TNS-BUF at http://tapr.org/kits_tns-buf through *October 20*. If we receive orders for at least 25 boards by then, we will charge credit cards and place the production order with our contract manufacturer. If we don't get 25 orders, we'll cancel the project and credit cards will not be charged. There's no guarantee that boards will be available for later order. We expect about 60 days between placing the manufacturing order and receipt of the boards at TAPR. We'll ship to customers ASAP after receipt. So that means you can expect to receive your order shortly after January 1. So, go to http://tapr.org/kits_tns-buf now to place your order before the deadline! John ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
