My Astron also has had heavy use over the 10 years which I have had it,
likewise, no bother!
The switched supplies are, however, smaller and lighter and hence useful for
travelling abroad which I do with one, and my TS2000.
David W Wood
GUILDFORD PHYSIOTHERAPY AND SPORTS CLINIC
MATTHEWS HOUSE
85 EPSOM ROAD
GUILDFORD
SURREY GU1 3PA
T: 01483 575876 (APPOINTMENTS)
302691 (ALL OTHER INQUIRIES/FAX)
E: [log in to unmask]
W: http://tinyurl.com/5wptcp
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-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of John Miller
Sent: Wednesday, November 12, 2008 1:29 PM
To: [log in to unmask]
Subject: Re: switching supplies cause interference
My Astron RS35M, same as RS35A but with meters on the front, has been
running continuously since I bought it 12 years ago, reason I bought it? I
had problems with a switching power supply and everyone told me I'd have no
problem if I get this one. So far, so good. I know with the strain I give it
daily it probably will need some minor work sometime soon, but so far, so
good.
----- Original Message -----
From: "Anthony Vece" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, November 12, 2008 1:23 AM
Subject: Re: switching supplies cause interference
> --=======AVGMAIL-491A765C0000=======
> Content-Type: text/plain;
> format=flowed;
> charset="iso-8859-1";
> reply-type=original
> Content-Transfer-Encoding: 7bit
>
> Lou;
>
> Those old analog power supplies are bullet proof.
>
> They are probably the most reliable pieces of equipment around.
>
> 73 De Anthony W2AJV
> [log in to unmask]
> ECHOLINK NODE NUMBER: 74389
>
> ----- Original Message -----
> From: "Louis Kim Kline" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, November 11, 2008 10:57 PM
> Subject: Re: switching supplies cause interference
>
>
>> Hi.
>>
>> I used switching supplies for a while, but have gone back to linear
>> supplies. I too was plagued with noise problems. Not just RF noise, but
>> in some cases the cooling fan proved to be annoying, so I've gone back to
>> the trusty old Astron RS20A, 35, and 50.
>>
>> 73, de Lou K2LKK
>>
>>
>>
>> At 09:43 PM 11/11/2008 -0500, you wrote:
>>> Pat and all:
>>>
>>>I agree with what you have said here. However, I have found the Samlex
>>>variety of switching power supply to be the least prone to the hash
>>>problem.
>>>
>>>I have used one now in my motor home with my HF set-up, and have no
>>>complaints whatsoever.
>>>
>>>73 from Tom Behler: KB8TYJ
>>>
>>>----- Original Message -----
>>>From: "Pat Gormley" <[log in to unmask]>
>>>To: <[log in to unmask]>
>>>Sent: Tuesday, November 11, 2008 9:17 PM
>>>Subject: switching supplies cause interference
>>>
>>>
>>> > Most switching supplies I've used tend to cause a lot of radio =
>>> > interference and you have to be certain its rating is equivalent to =
>>> > what you have in a transformer supply because the voltage regulation
>>> > may =
>>> > suffer a bit. 73- pat kk3f
>>> >
>>>
>>>
>>>--
>>>No virus found in this incoming message.
>>>Checked by AVG.
>>>Version: 7.5.549 / Virus Database: 270.9.2/1782 - Release Date:
>>>11/11/2008
>>>7:32 PM
>>
>> Louis Kim Kline
>> A.R.S. K2LKK
>> Home e-mail: [log in to unmask]
>> Work e-mail: [log in to unmask]
>> Work Telephone: (585) 697-5740
>
>
>
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