Re: [Flexradio] 222 MHz Optimum Setup
Thanks, The reason I asked about the differences in the Pre- and Post-2010 DEMI designs is that the Pre-2010 version I had was so bad on strong, out-of-band signal overload that I had to put a 2-cavity mil-surplus filter between it and the antenna to remove S-9 wide-band noise caused by my line-of-sight location to every TV and FM transmitter in the area. After the filter (1.5 dB loss), all was quiet. DEMI alleges that the new design is more resistant to strong out-of-band signals. Cheers, Mike - W8MM -Original Message- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Mike Valentine Sent: Thursday, January 19, 2012 10:52 AM To: FlexRadio@flex-radio.biz Subject: [Flexradio] 222 MHz Optimum Setup Hi all, What do the VHF/UHF Flexers consider the optimum way to use a FLEX-5000 on 222 MHz? Anyone know how the 2010 version of DEMI 222-28HP compares to the previous version? Is the DB6NT TR 222 H still available? What else is out there? Connection configuration quirks? Thanks in advance, Mike - W8MM ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] 222 MHz Optimum Setup
I have the older DEMI 222-28 and the newer unit. I can confirm that the newer unit is quicker to stabilize on frequency and seems to have better sensitivity. I'm driving mine with at 1500 via the xverter port. So far so good. Two more transverters to go and I'll have an all DEMI 10 band rover driven by the 1500. After that, I'm going to work on getting the 10M ref locked LO into as many of them as I can so band switches are spot on frequency. I can't wait to get rid of the 910h and be all SDR from 6m to 24g. The only real quirk I've had to work around is getting the attenuator pads back out of all the transverters when I moved from the Yaesu 817 IF to the low power xverter port on the 1500. I've also had to disconnect the 10M lo from the 1500 because of a birdie I can hear at 144.200 with it connected. I haven't yet worked out if this is a flaw in my LO, the DEMI 10-4 LO splitter I'm using or the way I have all the transverters interfaced. Disconnecting the LO from the 1500 fixed it for now, so I'll solve that issue later. For now the built-in LO in the 1500 appears to be stable enough it's not a big concern. Eric - kr0ver At 11:38 AM 1/19/2012, Lloyd Berg N9LB wrote: Hi Mike! I've been running the DEMI 222-28 25w transverter (2010 version) for about 2 years. Rig is the FLEX-5000, using the transverter ports into a dual 1-of-6 RF switch. It works well. I use it with a M2 222-10EZ antenna at 60 feet. I also have new version DEMI transverters for other bands, incl 902 and 1296, all are performing well. People tell me that the new version DEMI transverter frequency stability is greatly improved and the sensitivity and resistance to strong signal overload is also substantially better than with the earlier models. 73 Lloyd - N9LB Message: 8 Date: Thu, 19 Jan 2012 15:52:25 + From: Mike Valentine To: "FlexRadio@flex-radio.biz" Subject: [Flexradio] 222 MHz Optimum Setup Message-ID: <4b23f631d60e34478769fd89ac3a35c830009...@vr-ex2010.valentine1.com> Content-Type: text/plain; charset="us-ascii" Hi all, What do the VHF/UHF Flexers consider the optimum way to use a FLEX-5000 on 222 MHz? Anyone know how the 2010 version of DEMI 222-28HP compares to the previous version? Is the DB6NT TR 222 H still available? What else is out there? Connection configuration quirks? Thanks in advance, Mike - W8MM ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
[Flexradio] 222 MHz Optimum Setup
Hi Mike! I've been running the DEMI 222-28 25w transverter (2010 version) for about 2 years. Rig is the FLEX-5000, using the transverter ports into a dual 1-of-6 RF switch. It works well. I use it with a M2 222-10EZ antenna at 60 feet. I also have new version DEMI transverters for other bands, incl 902 and 1296, all are performing well. People tell me that the new version DEMI transverter frequency stability is greatly improved and the sensitivity and resistance to strong signal overload is also substantially better than with the earlier models. 73 Lloyd - N9LB Message: 8 Date: Thu, 19 Jan 2012 15:52:25 + From: Mike Valentine To: "FlexRadio@flex-radio.biz" Subject: [Flexradio] 222 MHz Optimum Setup Message-ID: <4b23f631d60e34478769fd89ac3a35c830009...@vr-ex2010.valentine1.com> Content-Type: text/plain; charset="us-ascii" Hi all, What do the VHF/UHF Flexers consider the optimum way to use a FLEX-5000 on 222 MHz? Anyone know how the 2010 version of DEMI 222-28HP compares to the previous version? Is the DB6NT TR 222 H still available? What else is out there? Connection configuration quirks? Thanks in advance, Mike - W8MM ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
[Flexradio] 222 MHz Optimum Setup
Hi all, What do the VHF/UHF Flexers consider the optimum way to use a FLEX-5000 on 222 MHz? Anyone know how the 2010 version of DEMI 222-28HP compares to the previous version? Is the DB6NT TR 222 H still available? What else is out there? Connection configuration quirks? Thanks in advance, Mike - W8MM ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
