Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Amplifier for better LW, MW, SW listening
Amplifier for better LW, MW, SW listening
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 19th January 2019, 01:43 PM   #11
jackinnj is offline jackinnj  United States
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Amplifier for better LW, MW, SW listening
Amplifier AND varactor tuning in a remote location presents some challenges -- MV109 varactor tunes 20 to 400 pF with 1 to 9 V bias, amplifier probably reconfigured for single supply. I would like to do this with the center coax conductor "hot". Suggestions welcome.

Since the AD8067 can be run 5 to 24V, just a simple resistive divider after the amplifier and run the center coax with a basic programmable supply?

Are there any surface mount varactors with the magnitude and range of these old Motorola units?
  Reply With Quote
Old 19th January 2019, 05:07 PM   #12
w5jag is offline w5jag  United States
diyAudio Member
 
Join Date: Feb 2007
Location: Arkansas
Is the amplifier part of the matching network? If not, does it create more problems than it solves to have it at the antenna? Can't be much loss in coax at these frequencies.

Win W5JAG

Last edited by w5jag; 19th January 2019 at 05:07 PM. Reason: Sp
  Reply With Quote
Old 20th January 2019, 02:16 PM   #13
angrypat is offline angrypat  United States
diyAudio Member
 
Join Date: Dec 2016
Location: L.I.N.Y.
Amplifier for better LW, MW, SW listening
Thank you for that radio locator link, may be useful.
  Reply With Quote
Old 20th January 2019, 04:11 PM   #14
jackinnj is offline jackinnj  United States
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Amplifier for better LW, MW, SW listening
Another paper by Trask:

"Active Ferrite Rod Antenna with Remote Tuning" http://home.earthlink.net/~christras...%20Antenna.pdf

Some sources:
Rods Archives - Fair Rite
Ferrite Rods - Palomar Engineers(R)
  Reply With Quote

Reply


Amplifier for better LW, MW, SW listeningHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
What are ya'll listening too? Mancave62 Full Range 24 2nd June 2016 12:05 AM
Solid State Power Amplifier Kits (Modules) - Listening Tests wanted tiefbassuebertr Solid State 1 25th July 2015 04:25 PM
What are you listening to? MikeW Pass Labs 36 20th June 2011 02:54 AM
DIY Power Amplifier designing by Listening Only lineup Solid State 67 23rd August 2010 03:56 AM
Listening impressions of Krell KAV 400xi Integrated Amplifier Justin Everything Else 4 7th January 2004 10:15 PM


New To Site? Need Help?

All times are GMT. The time now is 12:28 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki