[ARC5] Mike Preamp?

[Richard Knoppow]

     I don't know of a ready built mic pre-amp but there should be lots 
of circuits on the web. You need something very simple.
    Half a watt will drive most communications speakers to quite a loud 
level. Make sure you have some sort of impedance match. Most of the 
vacuum tube receivers did not put out much more than a watt (with rather 
high distortion).

On 1/18/2018 6:53 AM, Robert  Eleazer wrote:
> Looks like I am going to need a mike preamp on my ARC-114 and ARC-116.  
> Any of y'all have any circuits you would recommend?  I am going to run 
> some tests using an audio signal generator to see what kind of input 
> levels are required.
> I found a 500MW audio amp kit at RadioShack.com for $5.00 and I'll use 
> that for audio output.  Headphone volume is entirely adequate but I may 
> want to use a speaker.
> Thanks.
> Wayne
> WB5WSV

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL