[Elecraft] AC hum on tune

[Fred Jensen]

Julian, G4ILO wrote:
> 
> Obviously as you have had reports from other stations there must be
> something wrong but I don't think the K3 is particularly prone to
> transformer induced modulation. Mine sits right next to a Diamond GSV3000
> power supply which has a huge great transformer in it and I have never had a
> problem.

Don't know about the K3, but my K2 exhibits hum if I put it on top of 
the linear power supply.  I'm using a big switcher AD6E graciously gave 
me now and it works fine.  Incidentally, I had the same problem with a 
Motorola Maxtrac 70cm radio on top of an Astron linear supply.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2010 Cal QSO Party 2-3 Oct 2010
- www.cqp.org