BLIND-HAMS Archives

For blind ham radio operators

BLIND-HAMS@LISTSERV.ICORS.ORG
Options: Use Forum View

Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
Re: switching supplies cause interference
From:
T Behler <[log in to unmask]>
Reply To:
For blind ham radio operators <[log in to unmask]>
Date:
Wed, 12 Nov 2008 18:08:01 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (74 lines) 
    Lou:

Believe me, I really prefer the old Astron linear-type supplies that you 
have mentioned, but the Samlex switcher isn't that bad.

I don't seem to get much if any RF interference, and the fan on my Samlex 
has never run as long as I've used it.  Of course, I have the 35-amp 
variety, and only draw 18 to 20 amps at most when transmitting in CW with 
100 watts on HF.

Switchers really do seem to be a good option, in my opinion, where space is 
at a premium.

73 from Tom Behler:  KB8TYJ


----- 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
>

ATOM RSS1 RSS2