Also be sure VAC is turned off for voice modes....it adds another delay loop which can be very distracting.

----- Original Message ----- From: "Bradley Feldman" <brad...@bradleyloritheo.com>
To: <flexradio@flex-radio.biz>
Sent: Sunday, December 05, 2010 9:36 AM
Subject: [Flexradio] New 5000A User - TX Audio (severe distortion) Issues


I'm new to flex, sdr and this list.

I have a brand new 5000A, fully loaded (including the VHF/UHF board).
Station is completely new -- new QTH, new Mic (PR 781), new temporary
antenna (Miracle MMD 30m).

I've worked through issues on installation and receive and seem to have
those licked including using VAC with digital modes. Now I'm trying to get
TX working right for working QRP until spring comes and I can set up my
Steppir Bigir that's sitting here in a box.

I've been a ham since 1990, but have largely been on my own with regard to
setting up and solving shack problems-- I don't belong to any clubs at the
moment, so I appreciate any help I can get from this list with the issue I
describe below -- which may not be a "flex issue" but perhaps an ordinary
ham setup issue.  I don't know.

Here's the issue: When keying up and testing my mic in phone mode (I don't have a key set up), once there is enough audio level to drive some rf output power, I start to hear distortion in the audio-- it kind of sounds like the
sound of a helicopter with echo and reverb that continues until I unkey.

I've done Google searches, flex KB searches, forum searches and read the
flex troubleshooting guide to try and find a solution.  Based on that
information, I've tried the following:   I've grounded the radio to the PC
with ground strap.  I installed RS ground loop isolators on all audio
connections to/from the radio and PC.  I put extra ferrites on the PC side
of the stock flex firewire cable.

The issue remains. Any ideas of what to do next or what additional info is
necessary to help me?

*Bradley KK2QQ






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