[AMRadio] My Current EF Johnson Messenger 2 Audio


Bob Peters rwpeters at swbell.net
Thu May 31 08:06:02 EDT 2007


All I can say Bow is wonderful...I wish that I had of known about these
before I sold my Whiteface  ...Sound like an FM station
With processing  LOL

Bob W1PE

-----Original Message-----
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] On Behalf Of Bow
Sent: Thursday, May 31, 2007 2:36 AM
To: 'Discussion of AM Radio in the Amateur Service'
Subject: [AMRadio] My Current EF Johnson Messenger 2 Audio


 
Thanks to Ed Sieb's outstanding suggestions, my Blackface Johnson
Messenger 2 now sounds damn good.

Mark was interested in the mods, so I did a little recording and
Analysis.. The Before and After, if you will.. The Audio:

Bone Stock:
http://www.riley-music.com/BowsStuff/BlackFace/StkBlackfaceAudio.mp3

Modded: http://www.riley-music.com/BowsStuff/BlackFace/VUDUMSNGR2.mp3

The Audio Analysis:
http://www.riley-music.com/BowsStuff/BlackFace/ModdedBF.gif

Red line is the bone stock Radio
Blue line is 2 caps swapped (C24, C35)
Green line is 3 caps swapped (C24, C31, C35)

The Mods:

C24, C31, C35
Stock Values: .005 uF
Modification Values: 0.22 uF

Jumper R48 to increase power output to 8-10 watts carrier

Can you dig it? 


Bow

W5EFR


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