Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old February 9th 18, 12:38 PM posted to uk.radio.amateur,rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Mar 2017
Posts: 143
Default Computer / radio isolation for digital (or even voice?)




https://www.ebay.co.uk/itm/10x-Audio...EAAOSwDmtZlWH2

  #2   Report Post  
Old February 9th 18, 09:53 PM posted to uk.radio.amateur,rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: May 2017
Posts: 29
Default 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
  #3   Report Post  
Old February 9th 18, 10:03 PM posted to uk.radio.amateur,rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Aug 2013
Posts: 387
Default 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
  #4   Report Post  
Old February 9th 18, 10:06 PM posted to uk.radio.amateur,rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Aug 2013
Posts: 387
Default 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
  #5   Report Post  
Old February 9th 18, 10:15 PM posted to uk.radio.amateur,rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: May 2017
Posts: 29
Default 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


  #6   Report Post  
Old February 9th 18, 10:29 PM posted to uk.radio.amateur,rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Mar 2011
Posts: 75
Default 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?
  #7   Report Post  
Old February 10th 18, 09:08 AM posted to uk.radio.amateur,rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Aug 2017
Posts: 5
Default 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.
  #8   Report Post  
Old February 10th 18, 11:21 AM posted to uk.radio.amateur,rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: May 2017
Posts: 29
Default 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
  #9   Report Post  
Old February 12th 18, 05:15 AM posted to uk.radio.amateur,rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Aug 2017
Posts: 5
Default 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.
  #10   Report Post  
Old February 12th 18, 08:01 AM posted to uk.radio.amateur,rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: May 2017
Posts: 29
Default 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


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[KB6NU] Is DMR a mass adoption phase winner in digital voice radio? KB6NU via rec.radio.amateur.moderated Admin Moderated 0 June 8th 16 05:15 PM
Computer Voice 'Glitch' on 4426 kHz [USB] @ 0610 UTC RHF Shortwave 0 May 19th 11 10:06 AM
FS: Digital VOM w/Computer Interface Bill Crocker Swap 0 November 27th 05 05:48 PM
How does digital voice work ? Tom Equipment 0 March 21st 04 03:32 PM
Digital voice on VHF marine? J999w Scanner 7 August 28th 03 06:08 PM


All times are GMT +1. The time now is 05:23 AM.

Powered by vBulletin® Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright 2004-2018 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017