Re: [time-nuts] TNS-BUF High Isolation, Low Noise Buffer Amp Available
Hi Chris -- The input and output are straight SMAs mounted on the back of the PCB. The idea is that you can mount it in the cover of a small die-cast box secured by the SMA hardware (I used a Hammond BB1590N1). All you have to do is drill a couple of 3/16 holes, plus another hole for a power feedthrough. This is a buffer amp, not a distribution amp, so it's a single channel circuit, and high isolation was one of the key design criteria. John On 10/12/2016 09:08 AM, Chris Caudle wrote: On Wed, October 5, 2016 9:15 am, John Ackermann N8UR wrote: 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. None of the pictures have shown the connector side of the assembled PCB. Does the layout accommodate mounting in an enclosure? And is this layout just a single channel of the buffer design? In other words only for buffering an oscillator to a single other device for preventing crosstalk or injection locking, not for distribution. ___ 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.
Re: [time-nuts] TNS-BUF High Isolation, Low Noise Buffer Amp Available
On Wed, October 5, 2016 9:15 am, John Ackermann N8UR wrote: > 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. None of the pictures have shown the connector side of the assembled PCB. Does the layout accommodate mounting in an enclosure? And is this layout just a single channel of the buffer design? In other words only for buffering an oscillator to a single other device for preventing crosstalk or injection locking, not for distribution. -- Chris Caudle ___ 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.
Re: [time-nuts] TNS-BUF High Isolation, Low Noise Buffer Amp Available
It's possible we may have some bare boards, but no guarantees at this point. On 10/5/2016 2:04 PM, Dan Rae wrote: For those of us who aren't scared of surface mount stuff, and maybe even prefer it, will there be any bare boards available? Dan - ac6ao ___ 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.
Re: [time-nuts] TNS-BUF High Isolation, Low Noise Buffer Amp Available
For those of us who aren't scared of surface mount stuff, and maybe even prefer it, will there be any bare boards available? Dan - ac6ao ___ 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] TNS-BUF High Isolation, Low Noise Buffer Amp Available
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.
