Search found 9 matches

by IZ4FXT
Fri Nov 15, 2019 11:16 pm
Forum: Feature Requests
Topic: OpenGD77 - Repeater
Replies: 16
Views: 3167

Re: OpenGD77 - Repeater

I'm very interested also, in the possibility of connecting two gd77's acting them as a standard not-too-low power repeater! Coming from two HS Dual Hats, very bad in receiving (yes, worse than the 20mW on TX!!!). I just leaved a comment in Roger Clark blog asking for that, He and his friends are mak...
by IZ4FXT
Tue Aug 14, 2018 5:22 pm
Forum: MMDVM_HS Hat(s)
Topic: Duplex hat to work as simplex
Replies: 6
Views: 1660

Re: Duplex hat to work as simplex

@AF6VN for dvmega and openspot obviously tried without duplexer, but tried the duplex without the duplexer and with same antenna in rx plus another some meters away in tx, but nothing different... Same poor rx @W8DEX very interesting your experience. Also because of the two antennas are so near each...
by IZ4FXT
Tue Aug 14, 2018 3:34 pm
Forum: MMDVM_HS Hat(s)
Topic: Duplex hat to work as simplex
Replies: 6
Views: 1660

Re: Duplex hat to work as simplex

Hi w8dex, Thank you for Your answer, i'm suffering bad rx in duplex, very short range of about 50m with 6cell duplexer and external ant also with high gain setting , but simplex dvmega hat and openspot with right setting , are much better about 1km,same rf chip. So, now i want to try my duplex hat i...
by IZ4FXT
Tue Aug 14, 2018 10:20 am
Forum: MMDVM_HS Hat(s)
Topic: Duplex hat to work as simplex
Replies: 6
Views: 1660

Duplex hat to work as simplex

Hi all, Just for doing some rx comparation, I would like to put my duplex hat in simplex mode. I read something about that some time ago, but i can't find it anymore. There was written in that case only one of the adf7021 (tx OR rx of the duplex) remain in work both for rx and tx, the other one off....
by IZ4FXT
Sat Aug 11, 2018 3:31 pm
Forum: MMDVM_HS Hat(s)
Topic: Need help in compiling custom firmware
Replies: 5
Views: 3274

Re: Need help in compiling custom firmware

Hi vk7hse! I'm working with a 6cell duplexer and 7,6mhz of shift.... But the range, in term of meters, is limited from poor receving of the hat much before than the 20mw of transmitter unfortunately. Very close to the "garden of the house" range, tryng to do the village, not pretendig more... Knowin...
by IZ4FXT
Sat Aug 11, 2018 10:21 am
Forum: MMDVM_HS Hat(s)
Topic: Need help in compiling custom firmware
Replies: 5
Views: 3274

Re: Need help in compiling custom firmware

Thank You vk7hse, And thank You juribeparada also for sure, modifyng firmware for gain option. Made the custom firmware, the last right command have to be: sudo make mmdvm_hs_dual_hat Unfortunately, giving high gain option haven't brought any upgrade in sensitivity and coverage. I'll try vith auto a...
by IZ4FXT
Thu Aug 09, 2018 12:21 pm
Forum: MMDVM_HS Hat(s)
Topic: Need help in compiling custom firmware
Replies: 5
Views: 3274

Need help in compiling custom firmware

Hi all, I'm trying to compile a new firmware for my HS_Hat_Dual board, based on 1.4.6 in order to give High receive gain instead of default, with this new variable in this version in config.h to change. I'm a newbie in firmware, and also in Microcontrollers, Arduino and so on unfortunately. The proc...
by IZ4FXT
Tue Jun 26, 2018 8:58 pm
Forum: Other All-in-one Boards with included RF
Topic: Having more settings in firmware & Pistar
Replies: 2
Views: 1428

Having more settings in firmware & Pistar

Reposting of two topics, valid also for these boards, hoping an answer... Sorry and Thank You by KE0FHS » Sun Jun 03, 2018 12:36 pm I've been having some issues with the stability of the BER of my MMDVM_HS Hat hotspot when using DMR recently, and can't get it down to a low enough level. Can't say fo...
by IZ4FXT
Tue Jun 19, 2018 12:18 pm
Forum: MMDVM_HS Hat(s)
Topic: Suggestion for how to enable AFC in ADF7021.h
Replies: 1
Views: 788

Re: Suggestion for how to enable AFC in ADF7021.h

Hi, I've to add a request following this one. In my opinion, would be very useful to have in Pistar platform, settings for RX also; i.e. in ADF7021 (drag and drop from datasheet): " LNA has two basic operating modes: high gain/low noise mode and low gain/low power mode. To switch between these two m...