Although many have reported the same results below, the truth is the Heil
mics will work just fine plugged directly into the D44. The setup process is
as follows:
1. set the Delta 44 Ins 3 Variable signal level on the hardware
panel to -10 db
2. set the MIC level on the Power SDR to 70
3. Switch to the Display "Scope" mode
4. Click on MOX
5. Adjust the "Leveler" in the DSP AGC/ALC tab upward [from 10 db ] until
you see a slight disturbance of the horizontal trace. This is the optimum
audio setting. Now speak into the mic "thaaaaaaat" you should see a pattern
similar to a horizontal Christmas tree or at least the peaks should hit the
top and bottom of the screen.
6. If you still need more gain, switch the CPDR on. Start with a level 2
setting, more is not necessarily better.
If you have too much gain, reduce settings in the reverse order above.
A few other tips...
Use filter settings of 300-3000 for initial setup
Use the ALC transmit meter setting confirm proper audio levels-optimum audio
is achieved when the RED LINE varies between -5 db and 0.
If you use the EQ, you may have to increase or reduce your audio setting-use
preamp slider for more or less gain.
Always remember to check ALC or Scope levels.
Consider using a flat response microphone-most older ham mic cut off the
bottom frequencies below 300 Hz.
Great sounding audio from the SDR 1000 is a direct function of audio levels
and good quality microphone.
For additional tips, read my article on Optimized Audio on the Users page,
Flex-Radio web site.
I would be glad to meet anyone on the air to help them adjust their audio.
Good luck and 73,
John P. Basilotto
W5GI
Marketing and Product Manager
FlexRadio Systems
Office 512-250-8595
Mobile 512-663-6727
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Tim Ellison
Sent: Wednesday, April 26, 2006 8:08 PM
To: Jerry Harley; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] Unable to get an acceptable Tx audio
The D44 does not have a mic preamp like the Firebox. You will get the
best results using a mic preamp. You can play with the signal level
input values in the D44 control panel to gee if that will get you some
more gain.
When I was using the D44 with a Heil PR20 mic, I got the best results
using W2IHYs EQplus or 8-Band EQ to provide the preamp function (I
already had them in use with my Icom) along with some added audio chain
processing. The EQ plus or the 8-Band output wired into the SDR1K using
the Foster connector can provide PTT function as well with a remote
switch (foot or hand). The added benefit of this setup is that I also
use the audio chain with my Icom (backup rig) with just a twist of the
rig selector switch on the EQplus or 8-Band EQ.
-Tim
---
Tim Ellison ( [EMAIL PROTECTED] )
Integrated Technical Services ( http://www.itsco.com )
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jerry Harley
Sent: Wednesday, April 26, 2006 8:29 PM
To: FlexRadio@flex-radio.biz
Subject: [Flexradio] Unable to get an acceptable Tx audio
Compaq 2.4 EVO, New SDR1000, M-Audio D44, Hosa cables, Heil
goldline/hc5, Yaesu/Heil cord.
My best audio is at mic gain 50, but mic meter never reads better than
25. If i turn the mic gain to 55 I can get -22 but the transmit audio
has a lot of ehco. With just key down,no audio I'm seeing 60db on the
panadapter. Computer noise?
How are people who connecting directly to the mic D44 doing push to
talk?
Jerry WA2TTI
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