[Johnson] Audio mods

[Jennings]

Hi Ron
You might try WA1HLR's mods for the Ranger which has the same sort of =
"strangled chook" audio. Basically, there are three methods of attack.

1. Increase the value of the coupling capacitors between stages which =
will increase base response.=20
2. Decrease the value of the capacitors which shunt audio to earth and =
kill the sparkly highs.
3. Increase the value of the electrolytics which are used for cathode =
bypass capacitors

If you got to http://www.amwindow.org/tech/htm/rangtron.htm you will be =
able to see the direction that Tim headed in. I have done them with my =
Ranger and they really make a difference to the audio in a positive =
direction.


73
Lee ZL2AL - ZL7AA, ZL8RI, ZL9CI, VE3LJ

The noblest of all dogs is the hot-dog;
it feeds the hand that bites it.



Message:=20
Date: Sat, 17 May 2003 17:05:56 -0500
From: Ron Gerut <rgerut@megsinet.net>
Reply-To: rbgerut@alumni.northwestern.edu
To: johnson@mailman.qth.net
Subject: [Johnson] Viking2 simple audio mod?

Hi:
Can someone suggest a simple audio modification for a Viking2 that will
increase the bass response?  I made some changes in the first audio
stage and yet there is no bottom end.  I know people have done tear-out
and replacement mods, but I was looking for something simple-- if there
is indeed such a thing.  Thanks much!
73,
RON  K9KLT






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