Re: [IRCA] September 17 TP/DU Victoria B.C. Canada - the money shots

["R. Colin Newell" <coffeecanuck@xxxxxxxxx>]

My VACTROL sweeps from around 120 ohms (and that is a design thing that I
can change/lower) to around 3 K ohms.

I find my actual sweep of useful termination resistances are between 750
and 950 ohms - I have not yet done a complete calibration on
my current prototype (and I am building 3 more quickly with hopes of
on-demand production for other dxers...)

I use a 10 turn 1K pot in the DC controller and a calibrated 14 revolution
knob that is divided in 1/10ths

So far I have only concentrated on the low band / 530 khz to 1100 khz and
it is quite remarkable dialing out offending stations from the South/South
East!

On Thu, Sep 17, 2015 at 9:03 AM, neilkaz <neilkaz@xxxxxxxxxxxxx> wrote:

> Nice stuff! How much Rt variation do you have to do across the band with
> the vactrol to optimize F/B?  73 KAZ
>
>


-- 

*Colin Newell is the Editor and creator of Coffeecrew.com
<http://www.Coffeecrew.com> - Coffee.bc.ca <http://Coffee.bc.ca> and
DXer.ca <http://www.DXer.ca> -| Amateur Radio VA7WWV |
Twitter.Com/CoffeeCrew | Victoria B.C. Canada*
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