Thread: Narrow band antenna.
View Single Post
  #42   Report Post  
Old March 26th 08, 11:15 AM posted to sci.electronics.design,rec.radio.amateur.antenna
Artem Artem is offline
external usenet poster
  
First recorded activity by RadioBanter: Mar 2008
Posts: 28
Default Narrow band antenna.
On Mar 26, 12:26 am, Richard Clark wrote:
On Tue, 25 Mar 2008 13:55:16 -0700 (PDT), Artem
wrote:

Nice close-up. Choking of some of the lines seems OK, but not the
coax.
http://img370.imageshack.us/my.php?image=d2eb0.jpg

Could you find in this picture choke?

What material is used in the ferrite?

For transformer - low magnetic permeability (50) for chokes - high.


So, now where is the schematic of the biasing for these
varicaps? If those two clear insulation lines are going to the loop,

It's lines from resonance loop to amplifier.

Does this mean the varicaps are across the loop?

http://img524.imageshack.us/my.php?image=antjy3.jpg

Reply With QuoteReply With Quote