Howard and all:

I made a couple of small Braille paper inserts with a thickness of four
Braille paper sheets, and wedged them into both sides of the top of the
cover, and the hum is reduced greatly.

I also had my XYL take a look at the meters on the supply when keying it
into a dummy load for five minutes on 100 watts.

Although the accuracy of the provided meters certainly could be questioned,
the voltage read 15 volts, and the amperage read 16 amps.  And, all readings
remained rock solid with no fluctuations during the 5-minute dummy load
test.  The TS590 internal meter also read a solid 100 watts throughout.

So, I think I'm going to put this problem to bed, and get on with using the
new supply normally.

Thanks again to everyone for your patience.

Tom Behler: KB8TYJ


-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Howard, W A 9 Y B W
Sent: Saturday, December 12, 2015 5:26 PM
To: [log in to unmask]
Subject: Re: Re-thinking New RS35 Power Supply Issue Again

Tom,

If you have any rubber grommets that will fit over the mounting screws for
the transformer, put one between the chassis and the transformer mounting
ears where each screw is and see what happens.

Also, sometimes the metal laminations in a transformer will vibrate if one
or more didn't get glued together well during manufacturing.

Howard #3

----- Original Message -----
From: "Tom Behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, December 12, 2015 2:01 PM
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
>
> 


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