[AMRadio] re: Apache audio not good

[manualman at juno.com]

Don't use an amplified D104 on the Apache. That's like driving a Mack
truck through a corn field. Rewire the mike without the amplifier. Apache
input is looking for high impedance. If you read the set up instructions
and the circuit descriptions in the Apache manual, you can get a good
feel on the audio adjustments and what you should be seeing on the meter
in the "Mod" position. I would also check the AM Window and the AMFONE
web pages for Apache mods that range from simple to bizarre. Also
Electric Radio has had Apache mods written up over the years and also a
very good 3 issue coverage of Mohawk mods that make this matching
receiver perform like you have never heard before. I've had my original
Apache up and running since 1959 and still has the original audio
circuitry running in it. I use either a plain un-amplified D104 or an
Electro-Voice 664.
Pete

On Tue, 9 Apr 2002 11:35:01 -0500 "Ron Samchuk" <samvideo at escape.ca>
writes:
> Hi again... 
>     Thanks for all the advice and suggestions received so far 
> concerning the Apache and Mohawk.  I had one person asking me to be 
> more specific on what I was prepared to do.  I don't want to make 
> major changes or modifications, but simply have a good signal with 
> acceptable AM audio.  
>     For example, I used the Apache last night... power output was 
> fine, everything loaded up OK, but I could tell on the scope that 
> the pattern was not good.  It looked like vertical scratches rather 
> than a nice envelope.  Contacts tried to be nice, but did say it 
> sounded very much on the high frequency side, with one person saying 
> that he could receive me better on ssb setting.  The microphone used 
> here is an amplified D-104; being careful not to have too much audio 
> gain.  Something I have not done is grounded the rigs so there is a 
> possibility of course that perhaps rf is getting into the audio.
>     So any suggestions as to what to check or mods would be 
> appreciated.  Thanks in adance for any comments.  Ron VE4SR (VE4 
> Super Rabbit)
> 
> 
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