johnswenson1@comcast.net said: > I'm looking into a TU36-D400-020 receiver. > What antenna to use? I would prefer something mounted inside the case. It > is wood so an internal antenna will hopefully work. The board comes with a > pigtail but it is not SMA. That's an old receiver. Modern receivers are much more sensitive and much more likely to work indoors. I suggest getting a modern chip. Some of them come packaged with an antenna. Then you can play around with it from a PC, arduino, or Raspberry Pi to figure out what you will have to do and how well it will work. Here is one to consider: Adafruit Ultimate GPS Breakout - 66 channel w/10 Hz updates - Version 3 https://www.adafruit.com/product/746 If you have room on the display, you can display the offset between the time as derived from GPS and the time from the power line. :) -- These are my opinions. I hate spam.

From: Hal Murray That's an old receiver. Modern receivers are much more sensitive and much more likely to work indoors. I suggest getting a modern chip. Some of them come packaged with an antenna. Then you can play around with it from a PC, arduino, or Raspberry Pi to figure out what you will have to do and how well it will work. Here is one to consider: Adafruit Ultimate GPS Breakout - 66 channel w/10 Hz updates - Version 3 https://www.adafruit.com/product/746 If you have room on the display, you can display the offset between the time as derived from GPS and the time from the power line. :) ======================== Yes, there is a lot of difference between old and current GPS chips, with the modern ones being much more useful indoors. I've been using the Raspberry PI and can recommend this GPS board. It has an SMA connection and can use the usual puck antennas, allowing you to place the antenna in the best available location away from the computer. http://www.satsignal.eu/ntp/Raspberry-Pi-quickstart.html Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-taylor@blueyonder.co.uk Twitter: @gm8arv

That Adafruit Ultimate GPS Breakout works quite well indoors. I live in an older house with tongue & groove roof topped by slate and plaster & lath walls with thick stone on the outside. That GPS usually has 8+ satellites anywhere in the house except the basement. Basement not as good, often no reception at all. Ed On 7/11/2016 12:44 AM, Hal Murray wrote: > johnswenson1@comcast.net said: >> I'm looking into a TU36-D400-020 receiver. >> What antenna to use? I would prefer something mounted inside the case. It >> is wood so an internal antenna will hopefully work. The board comes with a >> pigtail but it is not SMA. > That's an old receiver. Modern receivers are much more sensitive and much > more likely to work indoors. > > I suggest getting a modern chip. Some of them come packaged with an antenna. > > Then you can play around with it from a PC, arduino, or Raspberry Pi to > figure out what you will have to do and how well it will work. > > Here is one to consider: > Adafruit Ultimate GPS Breakout - 66 channel w/10 Hz updates - Version 3 > https://www.adafruit.com/product/746 > > If you have room on the display, you can display the offset between the time > as derived from GPS and the time from the power line. :) >

On 7/10/2016 11:44 PM, Hal Murray wrote: > Here is one to consider: > Adafruit Ultimate GPS Breakout - 66 channel w/10 Hz updates - Version 3 > https://www.adafruit.com/product/746 I'm a fan of the Adafruit Ultimate GPS breakout. One has been at the heart of my GPS-based NTP time server here at the house for years. Great signal, even indoors. :) thanks, ben