[time-nuts] TNS-BUF
Hi All, Is there any TNS-BUF Isolation Amplifier boards available out there? Regards, VS ___ 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 Amplifier
Many thanks for your helpful TN work to John A. , Dr. Bruce and John M. Ordered 3 pieces. 73, Jim Robbins N1JR ___ 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 Update
We had enough interest in the TNS-BUF isolation amplifier project to go ahead with a production run. Thanks! The order has been placed with our contract manufacturer in Hungary and we expect the boards to arrive at the TAPR office in Texas around January 1, plus or minus shipping and customs delays. It'll take a little while for the office to recover from New Year's Eve, so we expect to get all orders shipped by mid-January. If you placed an order, you'll be getting an email from TAPR with further details. And of course if the schedule changes, I'll provide an update. BTW -- depending on manufacturing yield, there may be a few extra assembled boards available, as well as some bare PCB. I'll announce when we know for sure. Thanks, all. 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] TNS-BUF Isolation Amplifier
I've put some info about the TNS-BUF isolation amplifier at: http://febo.com/pages/TNS-BUF/ I'll work on adding to this page as I can, and in the next few days will post some information to the list about how we'll put a group order together. 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] TNS-BUF bare boards
Some time ago TAPR did a one-time run of a very low noise, very high isolation buffer amplifier. The assembled boards are sold out, but we had some extra blank boards made and finally (after a long story) got those delivered from Hungary to the office. If you're interested in a TNS-BUF board, they are $15 plus shipping and you can order via the button at http://tapr.org/kits_tns-buf.html I'm working on a publishable bill of materials for the parts to stuff the boards, and will put a link to it on that web page ASAP. 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] 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.
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.
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
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
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.
