[TenTec] RF Speech Processor "TX IMD"

[Bob McGraw - K4TAX]

Correct, simply saying that adding an amp and it correctly tuned/adjusted 
would not cause interference issues.

The use of the MIC gain or more correctly stated, the incorrect use of the 
mike gain, will have a dramatic effect on the results.  Add a bit of RFI 
getting back into the audio and one has a real nasty signal.  It not only 
sounds bad but is spectrally bad.  That fact along with the load on the amp 
will likely make a difference.

If someone wishes to provide me a FT-450 and ALS-500 I'll be glad to make 
measurements.

73
Bob, K4TAX


----- Original Message ----- 
From: "Rick - DJ0IP / NJ0IP" <Rick at DJ0IP.de>
To: "'Discussion of Ten-Tec Equipment'" <tentec at contesting.com>
Sent: Monday, June 17, 2013 1:41 AM
Subject: Re: [TenTec] RF Speech Processor "TX IMD"


> Bob,
>
> You were measuring a good transceiver with a good and properly tuned amp.
>
> You should take a look at the combination FT-450 / ALS-500.
> There is nothing for the op to tune, except the mic gain.
>
> You're in for a shock, regardless of where you set the mic gain.
> YOU CAN'T BLAME THIS ON THE OPERATOR!
>
> Guys, I maintain there are a lot less lids and a lot more bad radios then
> you think!
>
> 73
> Rick, DJ0IP
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Bob 
> McGraw
> - K4TAX
>
> A technically clean radio meeting today's technical standards and one that
> is adjusted and operated correctly and it being used in front of an amp,
> again one that is clean and adjusted properly is absolutely no problem.
> There are some import amps on the market that are largely "garbage
> generators"  spectrum wise.
>
> My measurements of my radio of the 3rd, 5th and 9th order signals and then
> feeding same to my amp, I find that the 3rd, 5th and 9th order signals are
> the same value or less in dB below the fundamental output.  I've conducted
> two tone tests with both the stand-a-lone radio and then the same with the
> amplifier with no issues of concern or any values not consistent with
> current technical standards.
>
>
>
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