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

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

Hi,
I have updated the paper adding the schematic diagram and in addition some updating for the comparative table.
http://www.timeok.it/wp-content/uploads/2015/08/Frequency-Distribution-Design-Basic-Module-v-4.1.pdf
This study come from a development of a Bruce Griffith idea.
regards,
luciano
www.timeok.it

Sorry for the broadcast.
Jim, N1JR,  I want to answer to your direct email about the distribution amplifier but there are some problem in your email basket. please verify.
Luciano
www.timeok.it

From "time-nuts" time-nuts-bounces@febo.com
To time-nuts@febo.com
Cc
Date Sat, 8 Oct 2016 13:57:03 +0200
Subject [time-nuts] Frequency distribution design-basic-module v 4.1

Hi,
I have updated the paper adding the schematic diagram and in addition some updating for the comparative table.
http://www.timeok.it/wp-content/uploads/2015/08/Frequency-Distribution-Design-Basic-Module-v-4.1.pdf
This study come from a development of a Bruce Griffith idea.
regards,
luciano
www.timeok.it

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.

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 jra@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com

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

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

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 jra@febo.com

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