[Elecraft] TS870

[Brett gazdzinski]

I don't know anything about the 870, but most other
modern rigs really seem to fall down in the audio department.

The ratings typically are 2.5 watts or less at 10% distortion,
no frequency response range or noise figures...

But even using the line out into a hifi amp and good speaker
does not improve things much, as a lot of noise and distortion
is in earlier stages.
Add in the off frequency overload and you have a really
poor sounding radio.


You can get an audio chip that puts out 20 watts times 2
and runs off 12 volts, with close to true hifi specs for about
$3.00 (car radio amps).

I just cant understand how they can make boxes that cost
$5000.00 and up with every feature you can think of and
put in a 1.5 watt 10% distortion amp and a 2 inch no fi speaker!

Brett
N2DTS
 

> 
> TS870 has best RX audio I ever heard. This is often neglected area
> in RX design, but stays in line from antenna to our brains.
> My experience of many RX building is to keep amplifier naturally
> linear without almost any feedback. Pass-band may be 20Hz....30kHz.
> 
> I hope K3 has the same quality in audio part.
> 
> TS870 can be modified with Inrad filters, but the real problem is
> still broad up-conversion band. Even the canadian gain-modification
> is just a partial help. To replace 0603 and 0805 SMD 
> resistors was just
> on the limit for my eyes.
> 
> TS870 has a genuine RF-clipper with real monitoring.
> 
> But K3 seems to have these and much more. I wait for mine
> and look forward for manual published here.
> 
> Benny OH9NB
> 
> 
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft    
> 
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>