tag:blogger.com,1999:blog-9071048343455395511.post5895924378695320514..comments2024-03-24T22:03:31.205+00:00Comments on Roger G3XBM's (Mainly) Amateur Radio Blog: How sensitive can headphones be?Roger G3XBMhttp://www.blogger.com/profile/13673890140751539870noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-9071048343455395511.post-42056945766974822872012-01-31T13:42:19.843+00:002012-01-31T13:42:19.843+00:00http://www.xtalman.com/headsets.html
China milita...http://www.xtalman.com/headsets.html<br /><br />China military headset, got one, still have to use them.<br />And i have modified them to make them comfortable.<br /><br />Greeting,<br />MarcelAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-60101375610267602562012-01-27T22:08:08.608+00:002012-01-27T22:08:08.608+00:00Thanks for all the comments. This is a fascinating...Thanks for all the comments. This is a fascinating thread and I am amazed just how good (sensitive) some headsets appear to be.Roger G3XBMhttps://www.blogger.com/profile/13673890140751539870noreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-61364390623507526282012-01-27T21:20:32.169+00:002012-01-27T21:20:32.169+00:00Hello Roger,
if you want something really new,
loo...Hello Roger,<br />if you want something really new,<br />look for ST-3 from Japan Radio company.<br />Mike/AA1TJ has used them with great sucess in all kind of gain-less receivers e.g.:<br />http://fhs-consulting.com/aa1tj/reggie.html<br />A czech OM managed to find them on the web a year or so ago.<br />Not that new, nor cheap, but in good shape one can buy Racal elements here:<br />http://www.roehrentechnik.de/html/detektor.html<br />They are as good as DLR-5, but a bit smaller, so they fit fine into a standard 2x2000Ohm holder with<br />little milling work to do -<br />measured 50fW(-103dBm)for a minimum detectable signal at 1kHz and used them with good sucess in several gain-less and low gain<br />minimalist receivers.<br />72!<br />Peter/DL3PBAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-46195692907832931612012-01-27T18:54:23.795+00:002012-01-27T18:54:23.795+00:00It seems that sensitivity was achieved after home ...It seems that sensitivity was achieved after home rewinding though...LY2SShttps://www.blogger.com/profile/16647751066268814831noreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-68043174942500974552012-01-27T18:50:52.742+00:002012-01-27T18:50:52.742+00:00Wow! Nice find Roger!
First find in Google regardi...Wow! Nice find Roger!<br />First find in Google regarding DLR-5 show amazing sensitivity comparing to crystal earpiece<br /><br />http://www.crystalradio.net/soundpowered/DLR5/index.shtml<br /><br />Results are in picowatts (at the very bottom)<br /><br />73!LY2SShttps://www.blogger.com/profile/16647751066268814831noreply@blogger.com