[Elecraft] Re: K3 Audio

[Ian Maude]

Bob Cunnings wrote:
> If you listen to Sherwood's presentation, you'd hear him state that
> the distortion problem he discusses occurs only when driving a low
> impedance (speaker) load. If driving a high Z load like, say, powered
> speakers, or using headphones, there is no problem.
>   
There is still a bit of a problem on receive audio.  This has been there
for some time and exists in the form of harmonics.  The 3rd harmonic is
quite easy to see and repeatable.  I used HRD to show this on the
waterfall after a conversation with a friend.
You can clearly see the harmonic at..

http://www.gb7mbc.net/docs/K3Audiotrace.doc

73 Ian
> So that might explain your observations.
>
> Bob NW8L
>
> On Tue, Aug 5, 2008 at 4:29 PM, Geoffrey Downs
> <geoffrey at downs.globalnet.co.uk> wrote:
>   
>> Would be interesting to know the detail of what Rob Sherwood said, but I
>> agree with you, Dave. The tx and rx audio on my K3 sounds cleaner, brighter
>> and clearer to me than my now obsolescent FT1000MP Field even before
>> applying any equalisation. I use either a headset or a couple of small
>> external computer speakers.
>>
>> 73 to all
>>
>> Geoff
>> G3UCK
>>
>> ----- Original Message ----- From: "Dave G4AON" <elecraft at astromag.co.uk>
>> To: <elecraft at mailman.qth.net>
>> Sent: Tuesday, August 05, 2008 9:55 PM
>> Subject: [Elecraft] Re: K3 Audio
>>
>>
>>
>>     
>>> Bottom line to me is the K3's audio is fine. And no, I'm not on commission
>>> from Elecraft!
>>>
>>> 73 Dave, G4AON
>>> K3/100 #80
>>>       
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>>     
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-- 

Ian J Maude, G0VGS
SysOp GB7MBC DX Cluster
Member RSGB, GQRP
K2 #4044 |K3 #455