Steve:

I guess I'm a bit puzzled as to why I didn't hear it with my older RS35, and
other supplies I've used.

All that aside, I think that tonight, I might take the cover off, and try to
re-tighten all the screws to be sure everything is firmly in place.

Then, I'll see if I can make some sort of a wedge out of folded Braille
paper or something like that to insulate the top and sides of the cover from
the main unit to cut down a bit on the vibration hum.

Thanks for your patience with this, everyone.

Tom Behler: KB8TYJ


-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Steve Dresser
Sent: Saturday, December 12, 2015 3:50 PM
To: [log in to unmask]
Subject: Re: Re-thinking New RS35 Power Supply Issue Again

Tom,

The increase in hum is normal.  It happens when you draw more current from
the supply, and it happens with all power supplies.  As long as the supply
is delivering the right voltage under load, you have no real basis for
returning it.

Steve

----- Original Message -----
From: "Tom Behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: December 12, 2015 15:01
Subject: Re-thinking New RS35 Power Supply Issue Again


> Hello, again, everyone.
>
>
>
> I am now beginning to wonder if today is my day for Murphy to make a visit
> here, or just what exactly the deal is.
>
>
>
> I was working a bit of the 10-meter contest today, and noticed a further
> problem with the hum issue on my new Astron RS35 power supply.
>
>
>
> I'm not sure why I didn't notice it last night when I did my testing, but
> now, I find that whenever I transmit in CW at any power level-i.e. 5 watts
> or 100 watts, the hum on the RS35 slightly increases.  In other words, 
> when
> I key down, I hear a slight, but noticeable increase in the hum at any 
> power
> level.
>
>
>
> So, now, I'm trying to decide whether I actually should return the supply 
> to
> H R O.
>
>
>
> I have my receipt and all other documentation, but I'm wondering whether 
> the
> folks at HRO would see this as a significant enough of a problem for a
> product return.
>
>
>
> The supply still seems to carry the load ok, and does put out what I would
> expect in terms of output power readings, but the hum issue is a 
> noticeable
> one now, on several counts.
>
>
>
> I don't mean to be obsessive about this, but I wouldn't expect to be 
> dealing
> with this sort of issue with a newly-purchased power supply like this.
>
>
>
> I'd continue to be interested in anyone's thoughts.
>
>
>
> Tom Behler: KB8TYJ
>
>