Re: [TenTec] Sub-receiver noise redux

[John L Merrill <jmerrill1@adelphia.net>]

I hear the pops, which is probably the PLL relocking ( common on other 
radios). But hear no change in noise level.
John N1JM

TJ Sheffield wrote:
> I’m running firmware version 1.372 and using DX4WIN Ver. 6.04 to 
> communicate with the Orion on a serial port.
> A master re-set doesn’t eliminate this condition.  Below certain 
> frequencies the noise disappears.  Cycling the power when the 
> sub-receiver is tuned below these frequencies fixes the condition, at 
> least until it recurs on a random basis.  I am unable to determine if 
> some combination of band / frequency / mode choice precipitates this 
> condition.
> Rolling the sub-receiver across the following frequencies shows where 
> the noise is present or absent (by mode):
> UCW  13.000.640  Present,   13.000.630 Gone
>
> LCW  12.999.300  Present,   12.999.290 Gone
>
> USB  12.999.970  Present,    12.999.960 Gone
>
> LSB  12.999.970  Present,    12.999.960 Gone
>
> AM   12.999.970  Present,    12.999.960 Gone
>
> FM   12.999.970  Present,    12.999.960 Gone
>
> Please try rolling your sub-receiver across these frequencies and let me 
> know if you detect an audible pop or other indication that something may 
> be happening in this region.
> In my case, even when the S-5 noise is gone, I can detect an audible pop 
> when the sub-receiver is tuned across these frequencies.
> Thanks very much,
>
> TJ Sheffield, KL7TS
> Anchorage, Alaska
>
>
> =============================================================
> PREVIOUS POST
>
> On an intermittent basis my Orion sub-receiver will display 
> approximately five bars of noise while the main receiver may show S-2.  
> Both receivers are on 20m at present.
> If I tune the sub-receiver down to 13.000.000 the five bars of noise is 
> still displayed and the hash is still heard in the sub-receiver.  If I 
> tune to 12.999.900 the five bars of hash drops entirely and a more 
> reasonable 1-1/2 bars of normal background hiss is heard.
> The sub-receiver noise at 13.000.000 and above sounds something like a 
> mixture of high and low tones that are cycling, burbling and/or pulsing 
> at a rapid rate.  Sorry I don’t have a more technical description for 
> this noise!  Tuning to 12.999.900 and below the hash disappears and I 
> hear the normal background hiss of a quiet band.
> If the sub-receiver is above 13.000.000 and I cycle the main power 
> switch off / on the condition persists.  If I tune to 12.999.990 and 
> cycle the power the condition is cured but a noticeable pop is heard 
> when rolling from 12.999.900 to 13.000.00 however the sub-receiver hash 
> is gone.
> When the sub-receiver noise is present the rig is not useable for split 
> operation but the cure at least is available.  I’m running the latest 
> firmware.
> These observations will be cross-posted to “ditsnbits” but I though I’d 
> mention it to the group.
> Thanks very much,
>
> TJ Sheffield, KL7TS
> Anchorage, Alaska
>
>
>
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>
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