Interesting. ? Perhaps it is being demodulates before that? ? Where in the line does it first manifest?
Gordon
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On Aug 4, 2022, at 01:08, Ashhar Farhan <farhanbox@...> wrote:
?
I have to report failure with the current attempt at eliminating the burp from the LM380.
I tried putting a 2.2ohms in series with 0.1uf across the speaker as a snubber.
I added a bypass on pin 1.
I put a 0.1uf across the input
I loaded down the input to 220 ohms.
None produced any difference.
It is incredible that 2.4 GHz signal of about 1 mw is getting inside an audio IC. Maybe the microwave homebrewers should use LM380 instead of expensive GaAs FETs. I will still chipping away at this interesting problem.
- f
We are early adopters because of the confidence we have in you!? Looking forward to getting mine on Monday!
On Tue, Aug 2, 2022 at 10:09 PM Ashhar Farhan <
farhanbox@...> wrote:
It is tough and frustrating to be an "early adopter". I thank you all for taking the plunge, Respect!
The joys of mass production and finding little bitty problems. ? ?We have the same thing in drug product production and vaccine production of course.... only when you make a lot of some thing do you start to find a little bitty unexpected issues.?
We have the incredible advantage of having Ashhar right on top of everything!! ? My first Heathkit had horrible key clicks and I think I spent a year shipping it back-and-forth Benton Harbor (from earning money vacuuming the house ) before I learned enough to fix it myself. ?
Gordon
?
Bob,
Thats the LM380 having some kind of oscillations. I will have a fix for the quickly. The sound goes away if you turn the wifi off. Right click on the wifi icon and select Wifi off.
- f
On Wed, Aug 3, 2022, 2:46 AM Bob Losee KO9V <
Loseeunc@...> wrote:
I¡¯m having the same sounds¡ anywhere from 4 to 8 sounds then a several second pause, then starts again. ? Changing audio level makes no difference. I¡¯ve never tried transmitting¡ just listened to WWV across town from me and it is a clean stable receiver.? Tried logging in to my wifi but I still have two red X characters over the wifi symbol
Bob, KO9V, Serial Number 20
On Aug 1, 2022, at 1:57 PM, Niels Jalling <niels@...> wrote:
?When I powered up my new sBitx I heard repeating noise from the loudspeaker. I knew I had seen the problem mentioned somewhere.
Found it on youtube:
Follow the description to turn off the WiFi and the noise goes away.
73 de oz9ny, niels
