[WriteLog] Audio Amp for DXP-38 Input

[Marty Tippin]

(I tried to post this a few days ago but never saw it appear on the 
reflector - here it is again...)

Regarding the discussion a few days ago about needing to step up the audio 
input into the Hal DXP-38 from rigs (like my Yaesu FT-920) that have a 
fixed-level audio output on the "packet" or "data" connector, I found a kit 
at a local hamfest last weekend made by Ten-Tec - it's available for $10.00 
from TenTec and looks like it will do just what I need. I've assembled it 
but haven't had time to hook it in-line with the rig yet.

Here's the info from Ten-Tec's web site:

Utility Audio Amplifier

Need a quick, reliable, inexpensive audio amplifier stage for that homebrew 
project? This careful design gives your project the very same audio output 
circuit that we use in today's TEN-TEC transceivers!  Enjoy 1.5 watts of 
low-distortion audio with no worry about motorboating and other unwanted 
oscillations. Includes optional preamp input for 10 dB gain. Important: 
this circuit is designed for 12-15 VDC.

T-KIT No. 1550, $10.00


www.tentec.com


I'll update the group after I've got the amp in-line. I did play with the 
DXP-38 using audio from the external speaker output of the FT-920 and it 
made a significant difference in weak-signal copy, so I expect this amp 
should do the same thing.

-Marty NW0L
  martyt@pobox.com


9/1/00 Update - Hooked the amp in-line with the DXP-38 today and it works 
like a charm. Adjusted for "full" illumination of the LEDs with a 599 
signal and it certainly seems to decode weak sigs better. Was listening to 
the 7X yesterday - far too weak for me to work, but printed suprisingly 
more than I expected it to (and certainly more than it used to).


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