Re: [Freetel-codec2] SM1000 phantom power

2015-09-09 Thread Walter Holmes
If the case could be removed faster, then a place for a 9v battery on the inside would be great. I have been using mine for many weeks on a 9v battery and I don't have to worry about power from a potentially noisy source like my vehicle's power line. The SM1000 draws such little power, if I have

Re: [Freetel-codec2] SM1000 phantom power

2015-09-09 Thread Matthew Cook
David, Provided people understand the limitations of phantom power then you're good. I have only implemented phantom power on transceiver cables that have an A+ rail (13.8V@1A). The majority of transceivers seem to have an 8V@30mA rail for biasing eletret microphones, these should be avoided at

Re: [Freetel-codec2] SM1000 phantom power

2015-09-09 Thread glen english
how about passive PoE connection style ? (IE same pairs, use of transformers etc) at least that is a standard. On 10/09/2015 9:53 AM, David Rowe wrote: > Hello list, > > A few people have modified their SM1000 to draw power from their radio > via the RJ45 connector. > > Rick and I have considered

[Freetel-codec2] SM1000 phantom power

2015-09-09 Thread David Rowe
Hello list, A few people have modified their SM1000 to draw power from their radio via the RJ45 connector. Rick and I have considered this a few times but to date have decided NOT to provide a power on the patch panel to date - as we are concerned about (i) possible damage to radios and (ii) v

Re: [Freetel-codec2] FreeDV 700(B) Fs=8000Hz patch

2015-09-09 Thread David Rowe
Hi Alfred, codec2-dev is likely to change at any time. I need that ability for my development. However the stable releases and FreeDV API version number are there to control exactly the situation you are concerned with. Cheers, David On 09/09/15 16:45, wully wrote: > Hi David > > Very nice!

Re: [Freetel-codec2] FreeDV 700(B) Fs=8000Hz patch

2015-09-09 Thread wully
Hi David Very nice! But please don't change the interface to often, because we are just at the point to test 700B in the wide field (current conds are very bad, so this will take time). It is very important, to have a stable environment to be sure about the effects on the air. When experimenti