Re: [TenTec] OII TX Audio experiment/findings

["Ron Castro" <ronc@sonic.net>]

Your settings sound about right, although if I understand, you have the RF 
set to 1?  Since the ALC controls the output level, you'll be generating 
more at lower levels.  Try the testing with the RF first at 100, the reduce 
it.
If your ALC light is defective, you will know it's operating when the peak 
output hits 100 watts, with the power set at 100.
SP 4 will give you crackling unless you have pulled a bunch of bass out of 
your audio before it goes into the radio, and/or the mic level is up too 
high.  The HC5 should work better with the SP, and in fact, that combination 
should be your 'pile-up buster' or 'ESP signal fixer', especially with the 
EQ cranked down -10 to -20.
Ron Castro
Chief Technical Officer
Results Radio, LLC


----- Original Message ----- 
From: <Kc9cdt@aol.com>
To: <tentec@contesting.com>
Sent: Friday, March 03, 2006 11:43 AM
Subject: Re: [TenTec] OII TX Audio experiment/findings


> Duane and all,
>
> OK, I just for the first time did some experimenting on the TX audio 
> issue.
> I am using two different Mic's.
> 1) A Heil Goldline GM-5
> 2) A Heil Classic GL-5
> Both have the studio (Wide) element and the HC-5 Narrow (Not the real 
> narrow
> DX)
>
> With either Mic in the narrow position, I get lots of drive, have to turn
> down the gain, and I seem to get distortion and clicking and high freq.
> raspyness.
>
> This is the SAME Mic and the same setting (narrow) I used with Orion 
> before I
> got OII.  So I started out here with the same Mic and the same OII 
> settings
> as the Orion. Logical as I didn't think they would have changed anything 
> in the
> Mic area. I guess they did. I here all this in the Monitor.
>
> OK, next scenario, based on you guys recommendations (Thanks very much), I
> switched the Goldline to Wide position (studio). No changes to the 
> settings that
> I used to get a good drive level. The meter barely moves, even if I yell 
> into
> the Mic (Yes this is with a dummy load, not on the air, Hi, Hi). I turn up
> the gain to full, better but very weak drive. I call Heil to see if there 
> is a
> difference in output from the two elements. They say no, send the Mic in 
> we
> will fix it free. It's on it's way tomorrow.
>
> OK, Now lets use the new Classic I bought for my vintage setup. It is set 
> for
> low Z, so should be fine for OII. Used on the wide position I use Monitor 
> to
> play with all the settings. Results:
>
> Settings:
> Mic Gain = 40
> Roll Off = 100
> SP = 4
> TX EQ = -7
>
> Sounds pretty good, have only got 1 report, it was weak DX so I didn't 
> even
> ask about the audio. It sounds pretty good in the Monitor. I am now 
> looking for
> some on the air reports. Without my ALC light working I don't know if my
> drive is OK or not, I set it based on sound quality and volume in the 
> Monitor.
> Still got to turn the Mon up to 90-100 to really hear (that's been a 
> complaint
> for a long time)?
>
> Ok, what I learned is the OII s a completely different radio than Orion!
> Didn't expect that.
>
> Also what I learned is there is definitely some things needing fixed: 
> These
> things shouldn't happen.
>
> 1) If I turn the TX EQ any more treble than -7 I get a DSP like crackle 
> and
> distortion
> 2) If I turn the SP up more than 4 same problem, distortion
> 3) If I turn the Mic gain too high I don't just get an audio distortion 
> that
> I would expect, I get crackle, pop and DSP sounding distortion.
>
> This is with RF at 1 so it should not have anything to do with any RF
> feedback, pickup etc.
>
> For now, I think I have some settings that will let me run.
> Now I need some on the air feedback of my signal quality.
>
> Maybe some of us should meet on a 20 mtr freq. this afternoon?
> Anyone available?
>
> 73,
> Lee, KC9CDT
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