Re: Vk3ye audio agc
Nope but then I don't get a pop when I key up I have the c124 mod done I
used
6.8yf it was all I had
[email protected]> wrote:
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chris gress <Chrisg0wfh@...>
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#29292
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Re: Vk3ye audio agc
Does the agc reduce the push to talk pop?
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KC8WBK
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#29291
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Re: Pins and colors
I also recommend a pushbutton for SPOT/FINETUNE.
73 Allard PE1NWL
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Allard PE1NWL
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#29290
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Re: BITX40 Sensitivity
Hi Mike,
I used DBM on HP test set.
The output was by ear. Minimum discernable signal. Volume full!
This was not a Two tone ssb test.
Do a minimum discernable test, thats a level you can have a
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Raj vu2zap
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#29289
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Vk3ye audio agc
Hi I built vk3ye's audio AGC and it works well on?
My bitx. there's one change on the video that's not shown. on the circuit the resistor between in4148?
And base bc548 is shown as 4,7k ohm but on
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chris gress <Chrisg0wfh@...>
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#29288
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Re: BITX40 Sensitivity
Can you describe the procedure you used? dBm or uV?
Did you use an output signal somewhere to monitor with scope?
With SSB, how did you set up the modulation? How did you determine you were not
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Michael Hagen
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#29287
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Re: Pins and colors
Errr, function button, not mode button.
Sent from Mike's iPad WA1MAD
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Michael Davis <maddmd818@...>
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#29286
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Re: Pins and colors
Well, I believe it finally uploaded successfully after a few Win 10 usb port hiccups. Now I need to add the mode switch and the wire up directions and probably remove/disable the anti gallop buttons
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Michael Davis <maddmd818@...>
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#29285
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Re: AGC working ...
Thank you for your answer. I think I will keep it connected. I wanted to switch in order to check the difference of having it or not.
Would this AGC eliminate the birdie sound? I feel it barely
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EA3IAV <Cesarleon@...>
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#29284
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W8TEE LCD/VFO
Hi All:
Thanks to everyone who responded , the LCD VFO items listed have been sold.
Thanks and 73, Ross K7RSB
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Ross Bell
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#29283
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Re: BITX40 Sensitivity
Hide San,
I was just as surprised!
I had the volume cranked to full to hear it. When I connected the antenna back the volume of noise was deafening !
The amp capacitor C113 is connected. Monssons
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Raj vu2zap
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#29282
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Re: CW mode delay
Hello Allard,
OK I understand your suggestion all.
I'm looking forward the next firmware update but take your time plaese...
Thanks again,73.
ja9mat Hidehiko.
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Hidehiko Komachi - JA9MAT
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#29281
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Re: CW mode delay
Hi Hidehiko-san,
Sorry, but that will not solve the issue unfortunately.
In the current design, the radio will automatically return to SSB mode when the PTT switch is pressed.
Perhaps we need
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Allard PE1NWL
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#29280
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Re: BITX40 Sensitivity
Hello Raj,
Really -130dBm?
It's great!
I will try again but I think I'm not able to hear -130dBm with my HP SG.
ja9mat
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Hidehiko Komachi - JA9MAT
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#29279
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Re: BITX40 Sensitivity
Good news for me! managed to fix my function Seimens generator. One white power bypass smd cap had a neat hole in it!
I connected the sig gen and found that I can hear the signal down to -130dbm.
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Raj vu2zap
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#29278
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Re: CW mode delay
Hi Allard,
Thanks for reply and OK I understand all you mentioned.
The first code loss will be prevent by using the manual PTT SW to ON.
But I feel the main issue is the 1:3 ratio of the morse code
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Hidehiko Komachi - JA9MAT
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#29277
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Re: CW mode delay
Hi Hidehako-san,
The cause of this is that there is a burst of RF which is coming directly
through the balanced mixer which is unbalanced for about 60 mS due to the
microphone amplifier stage being
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Allard PE1NWL
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#29276
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Re: BITX40 Sensitivity
OK thanks sarma and Raj,
Yes, -117dBm is enough for me.!
I only want to know the limitation of this simple receiver's sensitivity.
I'm waiting for Raj's measurement result.
ja9mat Hidehiko.
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Hidehiko Komachi - JA9MAT
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#29275
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Re: CW mode delay
Hi Allard,
Thanks for your reply quickly.
Well I feel the delay is noticed when I start to key the first dot or dash is lost.
And I feel the 1:3 ratio is broken during the transmit. Especially the
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Hidehiko Komachi - JA9MAT
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#29274
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Re: BITX40 Sensitivity
Thats about 0.3uV, more than enough.
On 40M the atmospheric background noise is higher than this.
You need a K2 sensitivity when using a poor antenna like a
mobile one whose gain will be negative
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Raj vu2zap
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#29273
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