Re: [time-nuts] Possible new run of TNS-BUF High Isolation, Low Noise Buffer Amp boards
Good news -- we had enough orders to justify doing a small production run of the TNS-BUF isolation amplifiers. We'll be placing the order with our contract manufacturer this week, and expect delivery in six to eight weeks. There will be a few extra boards available, so if you haven't ordered yet, there's still time. John On 05/08/2018 03:09 PM, John Ackermann N8UR wrote: Back in October, 2016, TAPR did a build-to-order offering of the TNS-BUF low noise, high isolation buffer amplifier. The original 2016 post is attached below. All of those units sold out, and recently I've had a few questions about whether more will be available. TAPR will do another one-off production run if we can get orders for at least 25 boards (the minimum to make manufacturing viable) by *June 1*. You can place an order by going to http://tapr.org/kits_tns-buf. The price will be the same as the previous production -- $119 plus shipping. If we receive orders for at least 25 boards by June 1, 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 your card will not be charged. We expect to ship finished TNS-BUF boards about 60 days after placing the production order. Best regards, 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 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.
Re: [time-nuts] Possible new run of TNS-BUF High Isolation, Low Noise Buffer Amp boards
Hi John, I missed the original run, and this is one of the things I sure would gather a few, and hope they could also get into a more continuous availability. I intend to get a couple, but I would potentially want more later, but I don't always have the resources to get that lifetime supply. Appreciate the effort greatly, and when possible, I also recommend friends to take a look at these projects just to get them of the ground. Cheers, Magnus On 05/08/2018 09:09 PM, John Ackermann N8UR wrote: > Back in October, 2016, TAPR did a build-to-order offering of the TNS-BUF > low noise, high isolation buffer amplifier. The original 2016 post is > attached below. All of those units sold out, and recently I've had a > few questions about whether more will be available. > > TAPR will do another one-off production run if we can get orders for at > least 25 boards (the minimum to make manufacturing viable) by *June 1*. > You can place an order by going to http://tapr.org/kits_tns-buf. The > price will be the same as the previous production -- $119 plus shipping. > > If we receive orders for at least 25 boards by June 1, 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 > your card will not be charged. > > We expect to ship finished TNS-BUF boards about 60 days after placing > the production order. > > Best regards, > 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 > > 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] Possible new run of TNS-BUF High Isolation, Low Noise Buffer Amp boards
Back in October, 2016, TAPR did a build-to-order offering of the TNS-BUF low noise, high isolation buffer amplifier. The original 2016 post is attached below. All of those units sold out, and recently I've had a few questions about whether more will be available. TAPR will do another one-off production run if we can get orders for at least 25 boards (the minimum to make manufacturing viable) by *June 1*. You can place an order by going to http://tapr.org/kits_tns-buf. The price will be the same as the previous production -- $119 plus shipping. If we receive orders for at least 25 boards by June 1, 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 your card will not be charged. We expect to ship finished TNS-BUF boards about 60 days after placing the production order. Best regards, 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 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.
