Re: OT: RE: out of specification operation with Si4721 for use on 4 Meters
#parts
very cool Larry, even if the Si4721 can't be used in a HAM band it can still be used as a "Handie Talkie" in the FM broadcast band within the limitations of the Part 15 rules here in the US.? -Justin
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Justin Kelly
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#44225
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Re: The issues of the TDA2822
Well, I might¡¯ve been a bit too forceful, but I wanted people to understand that creating a product out of thin air, manufacturing and shipping it all over the world is quite an undertaking. If all
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Gordon Gibby <ggibby@...>
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#44224
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Re: #uBITX Firmware KD8CEC - IF-Shift etc.
#ubitx
Tim, Good, looks like you now agree with my ost 44182 that moving the VFO + BFO is a better solution than?moving clk1 + BFO. As I stated in post 44182, the original uBitx code only moves the BFO when
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Jerry Gaffke
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#44223
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Re: The issues of the TDA2822
I agree with Gordon. I have gotten bad components from reputable suppliers such as Mouser and Digikey. It happens. It's annoying. But it's not Farhan's fault. Heck, I have even had component failure
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Tim Gorman
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#44222
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Please play well together
NOTICE: Recently there have been several incidents of group members not playing nicely together. Please take a look at what you are about to post to the group before you post it. If the content would
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Arv Evans
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#44221
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Re: #uBITX Firmware KD8CEC - IF-Shift etc.
#ubitx
Well I'm used to you criticizing what I write as if you don't understand it. Vince.
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Vince Vielhaber <vev@...>
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#44220
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Re: The issues of the TDA2822
Well said Gordon. Vince.
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Vince Vielhaber <vev@...>
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#44219
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Re: #uBITX Firmware KD8CEC - IF-Shift etc.
#ubitx
Wow! Testy, aren't we? I know I said basically the same thing as you. I just explained it a little differently! It was not meant to be a criticism of what you wrote! tim ab0wr "Vince Vielhaber"
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Tim Gorman
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#44218
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Re: #uBITX Firmware KD8CEC - IF-Shift etc.
#ubitx
I faintly disagree.?? Might work, but you are better off moving the VFO and the BFO, not clk1 and the BFO. If moving clk1, you change where the signal we extract is hitting the 45mhz filter.
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Jerry Gaffke
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#44217
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Re: #uBITX Firmware KD8CEC - IF-Shift etc.
#ubitx
Did you even read what I wrote? If so, did you comprehend? You repeated the same thing I wrote. Vince.
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Vince Vielhaber <vev@...>
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#44216
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Re: LCD Bumper
WA6ISP has them for sale in his catalog list -$4.00 Larry- W8LM
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Lawrence Macionski <am_fm_radio@...>
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#44215
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Re: OT: RE: out of specification operation with Si4721 for use on 4 Meters
#parts
I've built 2 "Handie-Talkie" type devices.Using DOJORI DRA818V VHF Band Voice Transceiver Module V1.21- I have found them on Ebay- in single lot quantities for $11. You program them with a USB to TTL
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Lawrence Macionski <am_fm_radio@...>
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#44214
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Re: #uBITX Firmware KD8CEC - IF-Shift etc.
#ubitx
Jerry, This is a very complicated subject. The BFO, i.e. CLK0 *has* to be at the suppressed carrier frequency in order to properly demodulate the signal. In order to do PBT you would have to shift
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Tim Gorman
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#44213
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Re: The issues of the TDA2822
I second Gordon's statements. This is a kit. Which, in my opinion, implies that there could be issues. Anyone purchasing a kit should know that. I don't care who you purchase a kit from, they will not
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M Garza <mgarza896@...>
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#44212
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Re: #uBITX Firmware KD8CEC - IF-Shift etc.
#ubitx
Hey guys, very important conversation. Most of the "principles" are here, Ashhar is sleeping hopefully, so, I wouldn't think of adding much other than to say that I have seen very illustrative
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Michael Shreeve
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#44211
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Re: The issues of the TDA2822
From Farhan's post:? So 100 boards got the WX part. They all got turned on at HFSignals.in final test, very very few of the WX parts blew there. It's only after they get out into the field and have a
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Jerry Gaffke
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#44210
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Re: RD16HHF1 power curve flattening...some
Glenn, Thanks for the wire size. I usually do not buy semiconductors from Ebay. I have been burned too many times. Just my preference. Thanks again, Marco - KG5PRT
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M Garza <mgarza896@...>
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#44209
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Re: ubitx mount question regarding lcd display and bezel
Mounting any LCD on a panel is a pain in the butt. Here¡¯s how I did it without drilling holes in the corners to hold the display. After you have painstakingly cut and filed the panel to allow the
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Mike Bryce <prosolar@...>
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#44208
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Re: The issues of the TDA2822
Oh for crying out loud! Could you folks leave this fellow alone? He¡¯s manufacturing A quality piece of equipment for chicken feed, under difficult circumstances, when nobody else rose to do the job.
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Gordon Gibby <ggibby@...>
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#44207
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Re: #uBITX Firmware KD8CEC - IF-Shift etc.
#ubitx
Yes Allard, I agree, It is a very effective and simple mod regardless of what you call it. I have been using it since your release and find it one of the best features of my Bitx. Willy
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Willy
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#44206
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