[AMRadio] B&W 5100B Progress Update


Brian Carling bcarling at cfl.rr.com
Sun Oct 17 09:22:26 EDT 2004


Great Tom. I worked a guy yesterday using a great sounding B&W 
5100B out of Gray Court, SC - it was W4IT, Steve.
Sent him a QSL card too.

On 16 Oct 2004 at 17:35, Tom Elmore wrote:

>   I finally had time this week to install the Stancor replacement modulation
> transformer for my B&W 5100B and have found a set of taps that work on both
> the primary and secondary windings. I can make full carrier output of at
> least 100 watts but the modulation is only making about 85 to 90 % before it
> starts to flatten out on the scope and distort. I have changed both the
> modulator and final set of tubes and still get about the same percentage of
> modulation. I was hoping to make at least 100% easily.  Someone mentioned
> recently that this was a characteristic of this unit and I wonder if it's
> power supply limitations or some other factors.
> 
> Thank You
> Tom Elmore KA1NVZ
> Anchorage, Alaska
> 
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