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Computer / radio isolation for digital (or even voice?)
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Computer / radio isolation for digital (or even voice?)
In message , Gareth's Downstairs Computer
writes https://www.ebay.co.uk/itm/10x-Audio...Ohm-Europe-1-1 -EI14-Isolation-Transformer-Newest/172824007609?epid=2184088304&hash=ite m283d1d13b9:g:d2EAAOSwDmtZlWH2 That's a fantastic price. I'm using a 600/600 ohm audio transformer to isolate an earth-loop problem between the rig and the PC (extracting the audio to feed into the sound card so I can get SSTV and DRM pictures using MMSTV and Easypal). -- Ian |
Computer / radio isolation for digital (or even voice?)
On 09/02/2018 21:53, Ian Jackson wrote:
In message , Gareth's Downstairs Computer writes https://www.ebay.co.uk/itm/10x-Audio...Ohm-Europe-1-1 -EI14-Isolation-Transformer-Newest/172824007609?epid=2184088304&hash=ite m283d1d13b9:g:d2EAAOSwDmtZlWH2 That's a fantastic price. I'm using a 600/600 ohm audio transformer to isolate an earth-loop problem between the rig and the PC (extracting the audio to feed into the sound card so I can get SSTV and DRM pictures using MMSTV and Easypal). It is, I ordered a pack this morning. At that price cheap enough for stock. I have some on surplus/scrap boards which came my way (I think part of the odd digital PMR radio system 'National One' when the local unit was scrapped) but, unsoldering them is a pain. At under £2.50 for 10, inc postage, it isn't worth it. -- Suspect someone is claiming a benefit under false pretences? Incapacity Benefit or Personal Independence Payment when they don't need it? They are depriving those in real need! https://www.gov.uk/report-benefit-fraud |
Computer / radio isolation for digital (or even voice?)
On 09/02/2018 21:53, Ian Jackson wrote:
In message , Gareth's Downstairs Computer writes https://www.ebay.co.uk/itm/10x-Audio...Ohm-Europe-1-1 -EI14-Isolation-Transformer-Newest/172824007609?epid=2184088304&hash=ite m283d1d13b9:g:d2EAAOSwDmtZlWH2 That's a fantastic price. I'm using a 600/600 ohm audio transformer to isolate an earth-loop problem between the rig and the PC (extracting the audio to feed into the sound card so I can get SSTV and DRM pictures using MMSTV and Easypal). BTW, did you know you are also supposedly a moderator for ulm, sorry a tame moderator for ulm? -- Suspect someone is claiming a benefit under false pretences? Incapacity Benefit or Personal Independence Payment when they don't need it? They are depriving those in real need! https://www.gov.uk/report-benefit-fraud |
Computer / radio isolation for digital (or even voice?)
In message , Brian Reay writes
On 09/02/2018 21:53, Ian Jackson wrote: In message , Gareth's Downstairs Computer writes https://www.ebay.co.uk/itm/10x-Audio...Ohm-Europe-1-1 -EI14-Isolation-Transformer-Newest/172824007609?epid=2184088304&hash=ite m283d1d13b9:g:d2EAAOSwDmtZlWH2 That's a fantastic price. I'm using a 600/600 ohm audio transformer to isolate an earth-loop problem between the rig and the PC (extracting the audio to feed into the sound card so I can get SSTV and DRM pictures using MMSTV and Easypal). BTW, did you know you are also supposedly a moderator for ulm, sorry a tame moderator for ulm? No! -- Ian |
Computer / radio isolation for digital (or even voice?)
On Fri, 9 Feb 2018 22:06:41 +0000, Brian Reay wrote:
On 09/02/2018 21:53, Ian Jackson wrote: In message , Gareth's Downstairs Computer writes https://www.ebay.co.uk/itm/10x-Audio...Ohm-Europe-1-1 -EI14-Isolation-Transformer-Newest/172824007609?epid=2184088304&hash=ite m283d1d13b9:g:d2EAAOSwDmtZlWH2 That's a fantastic price. I'm using a 600/600 ohm audio transformer to isolate an earth-loop problem between the rig and the PC (extracting the audio to feed into the sound card so I can get SSTV and DRM pictures using MMSTV and Easypal). BTW, did you know you are also supposedly a moderator for ulm, sorry a tame moderator for ulm? Oh dear, searching for support are we? |
Computer / radio isolation for digital (or even voice?)
On Fri, 9 Feb 2018 21:53:50 +0000, Ian Jackson
wrote: In message , Gareth's Downstairs Computer m writes https://www.ebay.co.uk/itm/10x-Audio...Ohm-Europe-1-1 -EI14-Isolation-Transformer-Newest/172824007609?epid=2184088304&hash=ite m283d1d13b9:g:d2EAAOSwDmtZlWH2 That's a fantastic price. I'm using a 600/600 ohm audio transformer to isolate an earth-loop problem between the rig and the PC (extracting the audio to feed into the sound card so I can get SSTV and DRM pictures using MMSTV and Easypal). I intend to try transmitting DVB-T on 438 Mhz but from what I have read doing such will result in extra bandwidth due to sidebands. |
Computer / radio isolation for digital (or even voice?)
In message , Lucifer
Morningstar writes On Fri, 9 Feb 2018 21:53:50 +0000, Ian Jackson wrote: In message , Gareth's Downstairs Computer writes https://www.ebay.co.uk/itm/10x-Audio...Ohm-Europe-1-1 -EI14-Isolation-Transformer-Newest/172824007609?epid=2184088304&hash=ite m283d1d13b9:g:d2EAAOSwDmtZlWH2 That's a fantastic price. I'm using a 600/600 ohm audio transformer to isolate an earth-loop problem between the rig and the PC (extracting the audio to feed into the sound card so I can get SSTV and DRM pictures using MMSTV and Easypal). I intend to try transmitting DVB-T on 438 Mhz but from what I have read doing such will result in extra bandwidth due to sidebands. I'm not sure how wide a single 'programme' DVB-T MUX is - but I suspect it should fit inside the top end of the band. However, be aware of the presence of certain non-standard repeater shifts (some up to 7.6MHz, I think). Aren't some people trying live digital in the 1MHz extension of 2m? You need to check with the BATC. http://www.batc.org.uk -- Ian |
Computer / radio isolation for digital (or even voice?)
On Sat, 10 Feb 2018 11:21:17 +0000, Ian Jackson
wrote: In message , Lucifer Morningstar writes On Fri, 9 Feb 2018 21:53:50 +0000, Ian Jackson wrote: In message , Gareth's Downstairs Computer m writes https://www.ebay.co.uk/itm/10x-Audio...Ohm-Europe-1-1 -EI14-Isolation-Transformer-Newest/172824007609?epid=2184088304&hash=ite m283d1d13b9:g:d2EAAOSwDmtZlWH2 That's a fantastic price. I'm using a 600/600 ohm audio transformer to isolate an earth-loop problem between the rig and the PC (extracting the audio to feed into the sound card so I can get SSTV and DRM pictures using MMSTV and Easypal). I intend to try transmitting DVB-T on 438 Mhz but from what I have read doing such will result in extra bandwidth due to sidebands. I'm not sure how wide a single 'programme' DVB-T MUX is - but I suspect it should fit inside the top end of the band. However, be aware of the presence of certain non-standard repeater shifts (some up to 7.6MHz, I think). Aren't some people trying live digital in the 1MHz extension of 2m? You need to check with the BATC. http://www.batc.org.uk I have DVB-T encoder modulator that can do 4 programs anywhere from 30 to 960 Mhz. |
Computer / radio isolation for digital (or even voice?)
In message , Lucifer
Morningstar writes On Sat, 10 Feb 2018 11:21:17 +0000, Ian Jackson wrote: In message , Lucifer Morningstar writes On Fri, 9 Feb 2018 21:53:50 +0000, Ian Jackson wrote: In message , Gareth's Downstairs Computer om writes https://www.ebay.co.uk/itm/10x-Audio...Ohm-Europe-1-1 -EI14-Isolation-Transformer-Newest/172824007609?epid=2184088304&hash=ite m283d1d13b9:g:d2EAAOSwDmtZlWH2 That's a fantastic price. I'm using a 600/600 ohm audio transformer to isolate an earth-loop problem between the rig and the PC (extracting the audio to feed into the sound card so I can get SSTV and DRM pictures using MMSTV and Easypal). I intend to try transmitting DVB-T on 438 Mhz but from what I have read doing such will result in extra bandwidth due to sidebands. I'm not sure how wide a single 'programme' DVB-T MUX is - but I suspect it should fit inside the top end of the band. However, be aware of the presence of certain non-standard repeater shifts (some up to 7.6MHz, I think). Aren't some people trying live digital in the 1MHz extension of 2m? You need to check with the BATC. http://www.batc.org.uk I have DVB-T encoder modulator that can do 4 programs anywhere from 30 to 960 Mhz. But how wide is it when it carries only one 'programme'? -- Ian |
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