[NLRS] An attractive amplifier for 6 meters

[KB0NLY]

Hmm, I would check to verify its one that he modified, and also that its 
tuned correctly.  I gave mine a slight tweak when I tested it, was easily 
getting 300w but I didn't push it any harder as my dummy load that I have 
right now is 100w continuous rated or 300w max at short intervals.  The 
other thing I found is the power supply rating he advertises is not exactly 
true, at least on this unit, at 48v it draws about 15 amps at 300w output. 
I found however that at 50v I can get 300w out with the 11-12 amps as 
advertised.

The other problem I encountered is my 48v supply is only capable of 15 amps, 
so at 300w it was working it hard and the voltage was starting to sag around 
45-46 volts.  But I have an old redundant server supply that’s rated for 50v 
at 25 amps and that will run it all day long at 300w output and draws around 
11-12 amps, the old analog meter wiggles a bit and I didn’t grab my digital 
meter to get an exact reading.

The main reason I havent done anything with this yet is I wanted to have 
some time to properly design a chassis to mount it in and put fans on it, 
along with repairing my 1kw dummy load.  Is it winter yet??

73,

Scott KB0NLY


-----Original Message----- 
From: David Palm
Sent: Thursday, September 17, 2015 8:40 PM
Cc: NLRS List ; Badger Contesters List
Subject: Re: [NLRS] An attractive amplifier for 6 meters



I guess maybe I spoke too soon -- I just this evening fired mine up for the
first time this evening and unfortunately I'm only getting about 150 watts
out for 7 watts in.  That's pretty far short of the advertised gain.


On Thu, Sep 17, 2015 at 6:34 PM, KB0NLY <kb0nly at mchsi.com> wrote:

> I contacted the seller, what he meant by the 250W max output is that’s the
> continuous duty rating.  Unfortunately the eBay listing doesn't let you
> specify that when you select the details.  Seems like a honest
> misunderstanding to me.
>
> I have one of these modules, but haven't put it to use yet!  I did bench
> test it with my 500w slug in my Bird 43 and they do deliver as promised.
>
> 73,
>
> Scott KB0NLY
>
>
>
______________________________________________________________
NLRS mailing list
Home: http://mailman.qth.net/mailman/listinfo/nlrs
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:NLRS at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html