On Tue, 4 Nov 2014, dave wrote:

On 11/02/2014 10:21 AM, DhiaDuit wrote:
On Sunday, November 2, 2014 5:35:43 AM UTC-6, George Cornelius wrote:
marc wrote:
I would like to find schematics for this kind of tuning kit


Not a kit in the normal sense. A kit either includes instructions -
and that normally means there is a schematic - or is so carefully
targeted - capacitor kit for an R4A - as to not need any.


http://www.benl.ebay.be/itm/QRP-1-30...em3ce983 2e27

http://www.benl.ebay.be/itm/361020782252

These kits provide the parts, sometimes no builing plans included. I
know more or less how to make, but don't really know why resistors
needed ... (or a print, in general ... if there are no transistors to
amplify ...)


Is there an SWR bridge or other monitoring capability? That might need
resistors.



Thanks
Marc

PS/ new sw schedule: fetch the zip on http://shortwave.tk

www.mfjenterprises.com (Antenna Tuners) Be sure to tighten the nuts and
bolts and screws. Because I think MFJ have a 'brew' once in a while when
they are working.


Most passive filters/tuners can be used a number of ways. Try it and see what
happens. A long wire might want to see a shunt capacitor input, might need a
series capacitor or a coil. Series capacitors make antennas act shorter
series coils make them behave longer. Shunts tend to do the opposite.
Experiment.

Yes, they are often shown built on a piece of wood (no metal box) and
alligator clips with wires to configure as needed.

Michael