David,
There's not much to test that for it's self resonant spot. Take your coil
and short out it leads. Then use your dip meter and sweep all the
frequencies it will be used at looking for a dip on the meter. If your not
quite sure about the exact frequency at the dip, use a frequency counter
with a pickup loop and place the dip meters coil beside it. It will show
the exact frequency the dip meters set to (oscillating at). If you do find
a hot spot, moving it to a unused band is accomplished by removing a few
turns or even adding them. After that, just recheck it for where it moved
to.
Will
On Sun, 30 Jan 2005 15:31:25 -0500, David C. Hallam <dhallam@rapidsys.com>
wrote:
After reading the posts on the subject of RF chokes over last few days, I
guess I am going to have to go back to the drawing board. I am in final
stages of completing a continuous tuning 3.5 to 30 MHz amplifier and
really
hadn't given the RF choke much thought. Someplace (I don't remember
where)
I picked up a nice solenoid wound RF choke on a ceramic form that "looked
right". Now I guess I will have to do some serious testing before
applying
any power.
David C. Hallam
KC2JD
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
__________ NOD32 1.880 (20040928) Information __________
This message was checked by NOD32 antivirus system.
http://www.nod32.com
--
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|