# GSM repeater
**URL:** https://discourse.myriadrf.org/t/gsm-repeater/170
**Category:** General Discussion
**Created:** [11 April 2015 06:24 UTC](https://discourse.myriadrf.org/t/gsm-repeater/170 "2015-04-11T06:24:02Z")
**Posts on this page:** 5
**Page:** 2
### Author:  [@andrewback](https://discourse.myriadrf.org/u/andrewback)
#### Post date: [18 January 2017 12:00 UTC](https://discourse.myriadrf.org/t/gsm-repeater/170/21 "2017-01-18T12:00:26Z")
Spare LimeSDR boards? I’m afraid not, but you can pre-order at Crowd Supply 🙂
There should be duplexer options which are packaged as modules or boards with RF connectors, that are much more convenient to use.
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### Author:  [@TegwynTwmfatt](https://discourse.myriadrf.org/u/TegwynTwmfatt)
#### Post date: [18 January 2017 12:59 UTC](https://discourse.myriadrf.org/t/gsm-repeater/170/22 "2017-01-18T12:59:36Z")
Yes there are plenty of them for ham radio but not found any for 800 MHz … Yet. I have the resources to make them but obviously convenience / laziness are key factors.
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### Author:  [@TegwynTwmfatt](https://discourse.myriadrf.org/u/TegwynTwmfatt)
#### Post date: [18 January 2017 13:07 UTC](https://discourse.myriadrf.org/t/gsm-repeater/170/23 "2017-01-18T13:07:30Z")
Ps. Any idea who wrote the instructable: [http://www.instructables.com/id/4G-LTE-Home-Repeater-With-LimeSDR/](http://www.instructables.com/id/4G-LTE-Home-Repeater-With-LimeSDR/) . It was somebody in the Lime Microsystems team. I did ask on the page where the duplexes came from but no reply 😞
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### Author:  [@TegwynTwmfatt](https://discourse.myriadrf.org/u/TegwynTwmfatt)
#### Post date: [20 January 2017 18:12 UTC](https://discourse.myriadrf.org/t/gsm-repeater/170/24 "2017-01-20T18:12:33Z")
My attempt at designing and building a duplexer using ‘old school’ individual SMD components. What do people reckon? Will it burst into flames when I turn it on? 😉
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### Author:  [@TegwynTwmfatt](https://discourse.myriadrf.org/u/TegwynTwmfatt)
#### Post date: [4 April 2017 18:40 UTC](https://discourse.myriadrf.org/t/gsm-repeater/170/25 "2017-04-04T18:40:17Z")
I’m just wondering if I can implement this repeater project on GNU radio or POTHOS @joshblum with the LimeSDR? Trouble is I can’t see any function blocks for digital loopback enable or MIMO enable. I also don’t know how to implement NCO up convert / down convert or implement the LO (local oscillator).
I have been trying to follow this Lime Micro systems tutorial:
> **[4G (LTE) Home Repeater With LimeSDR](https://www.instructables.com/id/4G-LTE-Home-Repeater-With-LimeSDR/)**
>
> 4G (LTE) Home Repeater With LimeSDR: LimeSDR is a low cost, open source, apps-enabled software defined radio (SDR) platform that can be used to support just about any type of wireless communication standard.LimeSDR can send and receive UMTS, LTE,...
But no success as yet. The repeater.ini file seems to be missing which would be very useful. I’m trying to replicate the file from the text and video, but there seems to be quite a few ways to get it wrong!
I wonder if it’s possible to create a block that can bypass the drivers and manipulate the registers directly?
Once I’ve cracked it, I’ll write up a better Instructable for it 😌
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