[ARC5] ARC5 receiver audio output questions

[Kenneth G. Gordon]

On 11 Apr 2014 at 16:18, Mike Hanz wrote:

> While I agree in general with all that you said, Ken, it can get a 
> little more complicated than that.

Oh, yes! :-)

> modulation at the distant end for all conditions.  The 400mW you quoted 
> is from para 4-14

Could be. Although that sort of depends on which version of the manual you 
are quoting from. I'll have to look in my manuals to see where I find that.

Thanks for the info, Mike. I always appreciate your input.

In my own case, I had read my version of the manual to state that 400 mW 
output was the normal maximum output power at the voltages which were 
normally used.

I went through an exercise on this forum about a year ago when I was trying 
to measure the true audio output power from one of my refurbished 
junquers, since its audio output "loudness" into my "matched" speaker 
seemed to be much greater than what I had imagined 400 mW would 
provide. 

After much messing around, I finally verified that at maximum volume, and at 
225 VDC plate voltage, the maximum output I got was 400 mW, exactly.

The input level from my signal generator was "full quieting". As I remember it, 
I was also looking at the audio output signal with my scope and was 
adjusting the input so that the output exhibited minimum distortion.

I was basing my previous statements on those factors.

In any case, the point I (think) I was trying to make is that 400 mW output is 
plenty enough for our purposes.

Ken W7EKB