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: DC Power Supply Roar
From:
Bob Martin <[log in to unmask]>
Reply To:
Bob Martin <[log in to unmask]>
Date:
Tue, 14 Oct 2008 10:17:22 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (93 lines) 
Sorry.  It's the 35a.

EchoLink Node - 55127
Please visit http://www.wan-leatonks.net.
----- Original Message ----- 
From: "Steve Forst" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, October 14, 2008 10:14 AM
Subject: Re: DC Power Supply Roar


> Perhaps my mistake.  He didn't give a full model number, so I just assumed
> he was speaking of  a linear supply, like the RS-35A or RS-35M, neither of
> which has a fan.
>
> 73, Steve KW3A
> ----- Original Message ----- 
> From: "Colin McDonald" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, October 14, 2008 12:04 AM
> Subject: Re: DC Power Supply Roar
>
>
>> the internal fan.
>> 73
>> Colin, V A6BKX
>> ----- Original Message ----- 
>> From: "Steve Forst" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Monday, October 13, 2008 9:56 PM
>> Subject: Re: DC Power Supply Roar
>>
>>
>>>
>>> Bob,
>>>
>>> I've had an RS-20A for over 20 years and an RS-35A
>>> for 7 years.  Both can be  noisy and there is a vibration  you can feel
>>> if
>>> you touch the top cover.  I've found that just  moving it around  a bit
>> can
>>> reduce any noise, although I've never experienced the roar you describe.
>>> They also both clunk pretty good when powered up.
>>>
>>> 73, Steve KW3A
>>>
>>> ----- Original Message ----- 
>>> From: "Bob Martin" <[log in to unmask]>
>>> To: <[log in to unmask]>
>>> Sent: Monday, October 13, 2008 8:13 PM
>>> Subject: DC Power Supply Roar
>>>
>>>
>>> > Earlier today, my almost new ASTRON 35 developed a really loud roar
>> under
>>> > load.  It had been on receive for 2 or 3 hours.  Then, At 5 Watts
>> transmit
>>> > on FM,  it was hardly noticed.  At about 40 Watts it is quite lout and
>> at
>>> > 100 continuous it can be heard throughout the entire basement. Just
>>> > now,
>> I
>>> > turned it on and went through the cycle noted above with no noise
>>> > heard.
>>> > In
>>> > stand-by I can't hear it at all now but when I was experiencing the
>>> > problem,
>>> > I could feel it vibrating ever so slightly.  Will try it before I turn
>> in
>>> > tonight.
>>> >
>>> > Any thoughts?
>>> >
>>> > 73
>>> > Bob Martin
>>> > KC3FI
>>> >
>>> >
>>> > EchoLink Node - 55127
>>> > Please visit http://www.wan-leatonks.net.
>>> >
>>>
>>>
>>> -- 
>>> No virus found in this incoming message.
>>> Checked by AVG.
>>> Version: 7.5.524 / Virus Database: 270.8.0/1722 - Release Date:
>>> 10/13/2008
>> 7:50 AM
>>>
>>>
>>

ATOM RSS1 RSS2