Hi,

I changed the subject line.

My Ameritron ALS1300 uses a switching power supply.  I've never had problems 
with birdies or any noise, but I believe that some D-expeditions have 
complained that the switching supplies were more noisy that an analog 
supply, so Ameritron now will sell either type of supply, whichever you 
prefer.  In my opinion, switching supplies are much more efficient and way 
much less, but they need to be well designed to keep the radio noise inside 
the case of the supply.

Bob, K8LR, [log in to unmask]

----- Original Message ----- 
From: "Steve Forst" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, May 02, 2013 10:40 AM
Subject: Re: mj88


From what I understand on the ALS-600, the original  production had a
linear supply, while several years ago they  added   a switching supply.
   I am not aware of any problems with the switching supply.  Looks like
you can pick either one, with the switching supply  $120 over  the
price of the amp with the linear supply.

73, Steve  KW3A


On 5/2/2013 10:02 AM, Richard Fiorello wrote:
> Hi;
>

Thanks for the amplifier info.  I guess I should be happy there are no t
> v i complaints.  Are there two different versions with two different
> power supplies?  If one has a switching supply wonder if there are any
> unwanted side effects?
> On an unrelated note, I am the happy owner of a mj88 which is kenwoods
> microphone cable adaptor for the ts480.  I've gotten some conflicting
> info as to whether I have to rewire the thing?  Is it usable as is?
> Thanks and remember be nice to one another.
>