[AMRadio] Better AM audio for a EF Johnson Messenger2

Bob Peters rwpeters at swbell.net
Mon May 28 22:57:08 EDT 2007

Bow that Banana mike was a great Mike but a D-104 amplified would serve
you better...If you don't want the banana and if it is chrome in good
shape I would love to buy it from you...I collect great mikes...

Thanks  Bob W1PE Dallas

-----Original Message-----
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] On Behalf Of Bow
Sent: Tuesday, May 29, 2007 12:54 AM
To: 'Discussion of AM Radio in the Amateur Service'
Subject: [AMRadio] Better AM audio for a EF Johnson Messenger2

Hey all,

Has anyone here ever played with a Johnson Messenger (or Messenger Two)
CB on 10 meters? I am looking for suggestions on how to get better
sounding audio out of the one I have. The Hardwired Crystal "Banana"
microphone is coming off ASAP and I plan on inputting audio from my rack
gear, or using a more modern dynamic microphone.

But I know this thing has to have some audio bandwidth bottlenecks.

Has anyone ever used one on the air?

The schematic is here:

For Starters, I think C24 needs to be increased to .22uf, to let some
low end through.

Any other suggestions?



No virus found in this outgoing message.
Checked by AVG Free Edition. 
Version: 7.5.472 / Virus Database: 269.8.0/821 - Release Date: 5/27/2007

AMRadio mailing list
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Partner Website: http://www.amfone.net
Help: http://mailman.qth.net/mmfaq.html
Post: mailto:AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.

More information about the AMRadio mailing list

This page last updated 19 Feb 2018.