Reggie wrote:
I'm a little confused. When I try to pick up WWV at 10 mhz I can't
find it...a hundred up...a hundred down. Picks up fine on SSB and AM
(International Shortwaves) but I don't really know where I'm at on the
band. The preselector seems to work ok on the selected MHz tick. What
do you think might be going on here?



Hi Reggie,

First, the preselector is very sharp, so it must be tuned carefully.
If you look on the preselector switch, you will see 2 positions marked
WB, which are intended for when you are tuning the VFO onto the desired
signal frequency Once you are receiving the signal, switch the preselector
selector to the frequency band desired, and carefully tune the center knob
of the preselector switch for a peak in signal strength.

Second, there is a calibrator that will give the usual 100KHz reference
signals for checking the KHz knob.

You might not be aware, but the 6217, uses a very strange setup for the
MHz selection knob. The knob actually turns a cap that tunes a VFO that
both down converts the RF to a 1st IF freq, and is mixed down so it can
also down convert the 1st IF to the 2nd IF frequency. This double mixing
cancels out any error in the MHz selection VFO's frequency setting.

Pretty cool!

This saved RACAL from needing the fist full of crystals, and switch contacts
that were used in the R390, yet still gives crystal stability in band
selection.

-Chuck