[TenTec] RE: Re: Model 253 Autotuner (Chuck (Jack) Hawley)

[Chuck (Jack) Hawley]

That's correct. I noted that it gets used up after repeated auto tuning...I
meant repeated retuning for lowest SWR. I figured my tuner was
typical...sounds like it is.
Chuck, KE9UW

> -----Original Message-----
> From: tentec-bounces at contesting.com
> [mailto:tentec-bounces at contesting.com]On Behalf Of Duane Budd
> Sent: Wednesday, August 25, 2004 13:48 PM
> To: tentec at contesting.com
> Subject: [TenTec] RE: Re: Model 253 Autotuner (Chuck (Jack) Hawley)
>
>
> I was told at the factory that if the auto-tuner was controlled by being
> connected to the Omni/Hercules combo, the EPROM was not being "used up";
> that that only occurred when it had to find the low SWR setting
> on its own.
> I bought an extra EPROM several years ago, but have not found the need to
> replace it so far.
>
> I use the tuner inline with the Omni/Hercules when setting up on
> a frequency
> and then switch over to the Icom 756Pro/QRO amp combo AFTER the tuner has
> "remembered" the correct settings.
>
> I agree with the second part of your comments concerning the loss
> of memory
> if the tuner is switched off and the band changed. It does indeed lose its
> position memory.
>
> Duane Budd
> w5ben at arrl.net
>
> Date: Tue, 24 Aug 2004 20:11:16 -0500
> From: "Chuck (Jack) Hawley" <c-hawley at uiuc.edu>
> Subject: RE: [TenTec] Re: Model 253 Autotuner
> To: <tentec at contesting.com>
> Message-ID: <LPBBIIAJGNDLJCFBBLGAKECFOGAA.c-hawley at uiuc.edu>
> Content-Type: text/plain;	charset="iso-8859-1"
>
> The auto tuner seems to need a new eeprom after repeated auto tuning...say
> about a year. The fix for this was to put a socket in for easy replacement
> of the eeprom (Ten-Tec). This shows up as a loss of one or more of the
> memory positions (the memory of the tuning at a particular antenna switch
> setting and band setting...there are 32 memory locations
> altogether...combinations of antenna switch position and band info input).
> The second thing I noticed is that if you turn off the tuner, and
> change the
> band input with the tuner off, turning the tuner on now will
> cause a loss of
> where the roller inductor is as far as the memory is concerned. The stored
> settings will be wrong until you do a "realignment" of the roller coil so
> the micro knows where it is.
> Neither idiosyncrasy is a big deal...would be nice not to have them.
> I also wish I had a better sense of where the roller coil and capacitor
> settings were for a particular tuning. I thought of putting a 10
> led display
> in...or maybe a 10 bit DAC and a meter...and something for the
> roller coil.
> But,  I still love this thing.
> Chuck, KE9UW

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