[Elecraft] Uncontrolled full volume with NR Firmware 3.27- Warning very loud!!

Steve Ellington n4lq at carolina.rr.com
Sat Aug 29 22:09:18 EDT 2009


Bob:
"The Birdie"? What birdie are you speak of that we too might tune across it. 
I have this urge to listen to caddisflies.

Steve
N4LQ
N4LQ at carolina.rr.com
----- Original Message ----- 
From: "Bob W Allen" <mcamp at gmavt.net>
To: <elecraft at mailman.qth.net>; <support at elecraft.com>
Sent: Saturday, August 29, 2009 3:22 PM
Subject: Re: [Elecraft] Uncontrolled full volume with NR Firmware 3.27- 
Warning very loud!!


> Now I can make this happen repeatedly, with the NR at 1-4 and the notch
> filter on auto as I tune across the birdie the volume goes very loud, it
> is louder  than any noise I can get the radio to do normally with the AF
> all the way up.
> I have discovered that this only does this in the NR 1-1 to 1-4 range,
> very repeatable. As you tune through the birdie the radio starts making
> a noise like caddisflies (moderate high pitched fast oscillation) then
> it becomes very loud white noise. I don't spend anytime playing with the
> controls but I know the AF does nothing.
> I copied this to Elecraft tech support.
> MCU (uC) 03.27, main DSP (d1)2.24, aux DSP (d2, if KRX3 is present),
> flash parameters (FL)01.02, and KDVR3 controller (dr )01.03.
> This is very loud, be careful!!
> Bob
> KB1FRW
> 73
>
> Bob Allen wrote:
>> An odd thing happened today, I was tuning through an area on 20m where I
>> have a birdie, about 14.270-14.273.
>> The noise reduction was on at 1-3 I think, I don't know what state the
>> notch filter was at or the noise blanker, as I tuned into this area the
>> audio was a bit odd, like screechy, I didn't think to much of that
>> because of how the noise reduction works around birdies, but it was
>> different than I had heard in the past.
>> All of a sudden the volume in the headset and the internal speaker went
>> to max and turning the volume control had no effect.
>> I shutdown the radio to avoid damaging things and when I turned it back
>> on everything was fine and I can't make it do this again.
>> Very odd (and painful), wondering if this has happened to anyone else.
>> Bob
>> KB1FRW
>> 73
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