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Re: LF: Re: OT: Headphones

from [M0FMT] [Permanent Link][Original]
To: "[email protected]" <[email protected]>
Subject: Re: LF: Re: OT: Headphones
From: M0FMT <[email protected]>
Date: Sat, 28 Jan 2012 13:24:02 +0000 (GMT)
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Try these Roger.
 
 
4400 ohm imp.
 
Or build an audio amplifier ?
 
73 es GL Pete M0FMT IO91UX
 
From: mal hamilton <[email protected]>
To: [email protected]
Sent: Saturday, 28 January 2012, 11:34
Subject: LF: Re: OT: Headphones

Roger
The DLR5 is nothing special the Z is only around 50 ohms whereas S G Brown and similar are 2000Z. Plenty of old headphones still about
g3kev
 
----- Original Message -----
From: Roger Lapthorn
To: [email protected]
Sent: Friday, January 27, 2012 10:29 PM
Subject: LF: OT: Headphones

Slightly OT but people like Mal and Jim may have an answer.

Is there a "modern" (i.e. can you buy it new today?) headphone set that is extremely sensitive in the same way that the old DLR5 headsets were in terms of efficiency converting AF to sound pressure in the ear? 

I believe Jim M0BMU claimed 2uV audio power could be heard using DLR5 headsets in his passive mechanical SAQ receiver. As DLR5s are more difficult to find these days I was wondering if there is anything as sensitive, or more so, around "new".

73s
Roger G3XBM

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