[Elecraft] Basement QRN

[David Ferrington, M0XDF]

One very good thing about Macs - I haven't heard of a single instance of
noisy psu


On 09/03/2008 22:42, "Stephen Prior" <sjp at sjprior.fsnet.co.uk> sent:

> I can report exactly the same thing!  My external USB drive's power supply
> is absolutely atrocious.  I had blamed my high noise level on everything
> else first.  I'd even turned the computer (mac) off, and that made no
> difference!  Sometimes life is just too complicated!
> 
> 73 Stephen G4SJP
> 
> 
> On 9/3/08 22:22, "Jay" <aj4ay at comcast.net> wrote:
> 
>> Thom LaCosta wrote:
>>> Did the problem go away when you replaced it with another of that type
>>> - i.e, was it a defective bulb? Or do all bulbs of this type give you
>>> this problem? I have several of them here and haven't noticed any
>>> problem, but I might have missed something.
>>> 
>>> I have one that's right over the rig...and as far as I can tell, it
>>> isn't making noise....I unscrewed it and there was no difference in
>>> the QRN.
>> Thom and the group,
>> 
>> I have had a terrible noise on 40m for quite a while and I thought (big
>> mistake) it was really band noise.
>> 
>> Last Thursday evening just before the Fox hunt, I decided to really
>> determine if it was band noise or "in the house" noise.
>> 
>> The CFL's, computer, and computer monitor were fine.  The last thing I
>> powered off was the brick power supply for an external IDE hard drive
>> that I use for backups.  The +20 noise dropped to nothing.  Plugging it
>> back in produced the +20 noise again.  My K2 with the KDSP2 sounds
>> better now than it has sounded in a long while.
>> 
>> I never realized just how noisy those small devices are.  Hope this
>> helps someone else....
>> 
>> Regards & 73
> 
> 
> 
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-- 
Being a System Administrator is like being a plumber.
If you do a good job, nobody knows. If you screw up, everybody gets covered
in s**t!