Need help with constant tone in audio output
Hi everyone. I was approved to join this group. I have a Bitx-40 XCVR. I have connected all the components to the board. I turn it on and can tune around. The Rx and Tx both work. But there is a tone
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Chuck
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#22285
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Re: Choice of speaker makes a difference
Worth experimenting with the speaker so I found out. I have an ex-Yaesu FT290 1W 8ohm speaker sat on top of the Bitx shipping box, sounded tinny, so I sat it on top of a cardboard tube, sounds really
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philip yates <phil@...>
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#22284
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Choice of speaker makes a difference
Your choice of a speaker for your BITX40 can really make a difference to the receive audio quality. I had been using a small 2-1/4 inch speaker (you can see it to the right of the circuit board in the
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Al Duncan VE3RRD
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#22283
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Re: My next QRP rig..
It's a great rig. I got in on the first run before the kickstarter.? The only downside, for some people, is the requirement for a PC. There aren't any stand-alone ADC/DAC/DSP boards available that I
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N0ECK
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#22282
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Re: compressor or processor for BITX40?
Hi The FT-817 guys have been down this path. Google around to find information. Here is one http://hamshop.cz/data/items/208_76.pdf Randy, K7AGE
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Randy Hall
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#22281
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Re: bitx output harmonics
What's this about and what did I miss? Might be a good one to attach to the original email. Jack, W8TEE To: [email protected] Sent: Sunday, February 19, 2017 1:17 AM Subject: Re: [BITX20] bitx output
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Jack Purdum <econjack@...>
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#22280
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Re: bitx output harmonics
ND6T had a nice informative post about a month before: ??http://bitxhacks.blogspot.in/2017/01/nd6ts-suppression-of-pesky-2nd-harmonic.html (
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Jerry Gaffke
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#22279
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Re: bitx output harmonics
Or this one: http://bitxhacks.blogspot.com/2017/01/nd6ts-suppression-of-pesky-2nd-harmonic.html??de ND6T
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Don, ND6T
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#22278
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Re: Unbalancing mixer
You can inject a few millamps into the modulator at the center tap. - f
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Ashhar Farhan
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#22277
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Unbalancing mixer
How do I go about unbalancing the mixer to produce a carrier? I know that R106 balances the mixer for no carrier. So I assume a small value resistor to unbalance it. 73 Ken VA3ABN
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Ken
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#22276
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Re: My next QRP rig..
I have a RS-HFIQ running with a 60 dollar windows 10 tablet and 2 external USB sound cards. It works very nicely but no 160 meters.? Mike WA3O
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Mike
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#22275
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Re: BITX40 - no RX, no TX
I need information about the core of the transformer T4. There are 9 trifilar turns 0.4 mm wire on core unknow for me. thank you Tom
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Tom Mysinski <tomasz@...>
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#22274
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Re: bitx output harmonics
In his note it is stated to use a cap with a suitable voltage rating. What would that rating be? Thanks Steve kb1chu
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Steve Black <kb1chu@...>
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#22273
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Re: compressor or processor for BITX40?
Yes I know that R136 is used to control the drive to the PA, and I have already increased it. I do get the normal amount of output power (7W). It's just that I believe that especially for QRP
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Allard PE1NWL
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#22272
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Re: BITX40
Is it a Problem with the BFO circuit ? .. Ide have a look here .. Marc 'Gw0wvl' ... Sent from Yahoo Mail on Android On Sat, 18 Feb 2017 at 21:21, Mark Underkofler<mark@...> wrote: I
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Marc Jones
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#22271
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Re: compressor or processor for BITX40?
I just wired up a cheap CB microphone, I'm using a Sadelta Bravo Plus ..I ?bought it as it was cheap and it's been in my box of Bits for sometime, I knew it would come in handy though ?:-) Marc
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Marc Jones
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#22270
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Re: compressor or processor for BITX40?
Hello Allard , I have the same experience and therefore I am thinking about building the PA0FRI RF speech processor for the Bitx40. Go to http://www.pa0fri.com/ Select: "MISC " And then select: "
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Cor Beijersbergen
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#22269
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Re: GPS corrected Arduino controlled VFO
fabulous stuff! - f vu3vrl@...> wrote:
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Ashhar Farhan
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#22268
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Re: GPS corrected Arduino controlled VFO
Adi RameshSent from Yahoo Mail on Android
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Ramesh v
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#22267
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Re: bitx output harmonics
use what you have. if it blows up. write about it. - f johnlinux77@...> wrote:
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Ashhar Farhan
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#22266
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