Hi Tom!
Definitely like your trade off analogy.
I'll take your hum any day for my local QRM, hi hi. The headphones see a lot
of use here. Screw this open plan stuff! I'm actually thinking a seprate
room concept is looking more attractive every day. Never wanted to change
things anyway, so it isn't surprising that the experience only justifies
what I already knew.
73,
Dave
73,
Dave
-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Tom Behler
Sent: Monday, 14 December 2015 5:56 a.m.
To: [log in to unmask]
Subject: Re: Re-thinking New RS35 Power Supply Issue Again
Well, Bob, hopefully the Braille paper fix I posted on the list hast night
will keep the hum tolerable.
I had actually seriously considered purchasing a switching supply, but
wanted to avoid the potential for birdies that switchers often introduce.
I guess life is just full of trade-offs, huh!
Anyway, I think I'm ok now.
Tom Behler: KB8TYJ
-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Bob Tinney
Sent: Sunday, December 13, 2015 11:41 AM
To: [log in to unmask]
Subject: Re: Re-thinking New RS35 Power Supply Issue Again
Tom, Yes, it is normal, that is why I am no longer using that supply.
Bob, K8LR, [log in to unmask]
On 12/12/2015 3:38 PM, Tom Behler wrote:
> Bob:
>
> I have done this, and it has reduced the hum to some degree.
>
> But, the hum still gets slightly but noticeably louder when I transmit
> at any power level.
>
> I don't recall having this problem with other similarly rated power
> supplies.
>
> Do you think this is normal; I just wasn't expecting it, I guess.
>
> Tom Behler: KB8TYJ
>
>
> -----Original Message-----
> From: For blind ham radio operators
> [mailto:[log in to unmask]]
> On Behalf Of Bob Tinney
> Sent: Saturday, December 12, 2015 3:17 PM
> To: [log in to unmask]
> Subject: Re: Re-thinking New RS35 Power Supply Issue Again
>
> Tom,
>
> As others have said, the hum is probably coming from a vibration in
> the steel cover. When I had an Astron RS35, I stuck a folded file
> card between the top edge of the front panel and the top cover and
> that really reduced the transformer hum that I could hear.
>
> Bob, K8LR, [log in to unmask]
>
> On 12/12/2015 3:01 PM, Tom Behler wrote:
>> 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
>>
>>
|
