Impressive Gary.
<div>(And "599" sounds better)
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-----Original Message-----
From: Dukes HiFi <dukeshifi@comcast.net>
To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Sent: Mon, Jan 23, 2017 08:09 PM
Subject: Re: [TenTec] Repairs - Omni VII
I meant 588.RUF!
> On Jan 23, 2017, at 7:15 PM, Dukes HiFi <<a
> href="mailto:dukeshifi@comcast.net";>dukeshifi@comcast.net</a>> wrote:
>
> I just completed repair of an Omni VII for a fellow TT user. This radio would
> lock into TX whenever keyed and required a power cycle to unlock it. Reset
> process did nothing to help.
>
> I thought I’d share the repair results with the reflector so that others
> might benefit from my work.
>
> At the outset of my investigation, I convinced myself that the radios was not
> suffering from some sort of RF feedback that might have caused the thing to
> lock up. i had seen Orion’s do that so this was my first choice in diagnosis.
> I did this test by reducing the F power for the TUNE mode to 5 watts. Then I
> also disconnected the drive to the RF amp to ensure that no significant RF
> was being produced. The same failure mode occurred, all bands, all modes.
>
> I then studied the operation of the TX/RX control design. This thinking
> process was led by the possibility that something on the TX DC line might be
> shorted. This is not possible, however, since every TX command in this radio
> comes out of a MAX-232 serial port driver. Everything in the radio that would
> make use of the TX data has its own serial command reading device.
>
> The only thing really left on the table was firmware corruption. Therefore, I
> went through a rather frustrating process of combining a good 599.RUF
> firmware file with a working Ten Tec setup program since none of the ones at
> TenTec.com <<a href="http://tentec.com/";
> target="_blank">http://tentec.com/</a>> work any longer and RKR is gone
> totally.
>
> What I did was use a legacy version of Pegasus setup software and accessed a
> known good copy of the 588.RUF firmware.
>
> Viola! All seems working well. Firmware version is now 1.026.
>
> I hope this saves someone out there some grief.
>
> 73
>
> Gary
>
> W0DVN
>
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