[Elecraft] K2 Volume

Tue Sep 16 22:12:00 2003

Hi gang,
 I've seen several guys comment that they are using a Motorola amplified
speaker with their K2's.  I was wondering anyone could tell me the model
number.  I see one  described as "Motorola model NSN6054A 12 volt amplified
mobile speaker"  which looks like it was designed for mobile use.

Thanks
Tom McCulloch
WB2QDG
K2 #1103

-----Original Message-----
From: Tom Hammond <[email protected]>
To: Don Brown <[email protected]>; [email protected]
<[email protected]>
Date: Tuesday, September 16, 2003 5:24 PM
Subject: Re: [Elecraft] K2 Volume

>I'm using Motorola external Amplified Speakers and they work GREAT. Can be
>found at hamfests in the $15-$20 range most of the time.
>
>73,
>
>Tom
>
>
>At 03:36 PM 9/16/03, Don Brown wrote:
>>Hi
>>
>>A simple test of the LM380 would be to set the side tone to a known value
>>say 50 and measure the RMS volts across the speaker. As the side tone is
>>generated in the MPU/DAC the drive signal should be the same in all K2's.
>>If it varies from K2 to K2 then the gain of the LM380 is the culprit.
>>
>>I have tried several external speakers. The passive ones have not been as
>>loud as the K2 built in speaker. I tried several amplified computer
>>speakers and found many of them will not tolerate RF fields near by. They
>>will hum when the transmitter is keyed. Some of the better ones do not do
>>this but they are in the $100 price range. I had problems with the cheap
>>$20 computer speakers. I have not tried it on the K2 but I use a Kenwood
>>remote speaker in my car on my Kenwood TMV-7 it is a DFK-7C and it is very
>>loud but still small. It may work with the K2.
>>
>>Don Brown
>>KD5NDB
>>
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