Re: Bob Larkin, W7PUA, has built a new radio!
AI is real stupidity!!
Gerry Shermaan
By
Gerald Sherman
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#115869
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Re: uBITX v6 Low Audio - Back at it again
Hello All,
1) Good points Raj - Richard check voltages during RX on R18 and R38. See the picture below. Supply voltage for two RX chains is coming "from the top". Voltage drop on R18 and R38 is around
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tomekdm sp7etd
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#115868
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Re: Bob Larkin, W7PUA, has built a new radio!
I hope Bob does release it. Pretty impressive function but the display could stand an upgrade to a real screen. Amazing how much expertise is available worldwide and gladly shared with others. It can
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Kees T
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#115867
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Re: Bob Larkin, W7PUA, has built a new radio!
Knowing Bob, he might just release the pcb layout. There so many jewels in
there.
Who can figure out how the antenna relay on the RF board works? Quickly!
gmail.com@groups.io> wrote:
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Ashhar Farhan
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#115866
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Re: Bob Larkin, W7PUA, has built a new radio!
Verrrrry Interesting! Any plans to market the Tiny Ten, either as a kit or
assembled?
gmail.com@groups.io> wrote:
By
Richard Spohn
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#115865
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Re: uBITX v6 Low Audio - Back at it again
Transmit and received have different signal paths.
When in RX check if there is 12V available on both sides R18 and R38 ?
The voltages of V6 are very close to V4 which I have noted in a file in the
By
Raj vu2zap
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#115864
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Re: Cannot set grid and call
The pin is 123456
ziggo.nl@groups.io> wrote:
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Ashhar Farhan
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#115863
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Cannot set grid and call
Cannot set grid and call in new bought set at hf signals asking for pin code i didnt got
By
Pa0gig
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#115862
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Re: zBITX ordering
I sent an email directly to HF signals and was told I'd be added to the
next list.
glazko.com@groups.io> wrote:
By
Tony
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#115861
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Re: uBITX v6 Low Audio - Back at it again
See below - base to emitter should be 0.6 - 0.7 volts and collector to emitter should be 1.6 - 1.7 volts. The Base-emitter voltage is kinda critical, because you want the transistor to conduct the
By
Lee
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#115860
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Re: uBITX v6 Low Audio - Back at it again
Evan. What voltages would I expect to see at Q70? Will report back.
73, Richard AG5M On Monday, February 24, 2025 at 03:15:48 PM PST, Evan Hand via groups.io <elhandjr@...> wrote:
By
Richard AG5M
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#115859
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Re: uBITX v6 Low Audio - Back at it again
SSB operation is fine, I used it to check into the Noon-Time-Net this morning, both SSB and CW, no problem hearing the sidetone, that's for sure, it's really loud. Audio reports on the Net were FB on
By
Richard AG5M
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#115858
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Bob Larkin, W7PUA, has built a new radio!
Bob Larkon, W7PUA, is one of the three authors of the EMRFD. He has been a
large influence over the years, and I learnt a whole lot of RF and SDR
stuff from him. He is a remarkable homebrewer and a
By
Ashhar Farhan
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#115857
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Re: uBITX v6 Low Audio - Back at it again
I should have noted that the focus on Q70 assumes that the SSB transmission is working correctly.? The proper operation of SSB transmission and the audio sidetone leaves only Q70 as the link in
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Evan Hand
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#115856
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Re: uBITX v6 Low Audio - Back at it again
Hi Richard,
Based on this new information, I would verify the Q70 DC operating point:
According to Raj's (VU2ZAP) sheet, the base should be 0.6 to 0.7 volts, and the collector should be 1.6 to 1.7
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Evan Hand
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#115855
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Re: sbitx v3 issues
Thanks Gordon. Yes, I do agree that the art of designing, building, diagnosing, and repairing has been lost with the availability of new tech going up, and prices down. It will likely cost me less
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Michael Bales
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#115854
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Re: uBITX v6 Low Audio - Back at it again
I appreciate everyone who were helping me troubleshoot my uBITX V6 with low audio before Christmas. I've since been gone spending time with the grand-kiddies. Now going to get back to this.
I
By
Richard AG5M
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#115853
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uBitxV6 - Xmt power equalization: Another Relay Modification (added to Allison's mod.)
I recently completed Allison's (KB1GMX) transistor replacement modification to improve transmit output power on the higher bands ( https://ubitx.net/fix-fix-uneven-tx-output-across-bands/ ). The
By
DaveW, KL7HJF
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#115852
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Re: sbitx v3 issues
Joel,
I never said YOU were new to the community, I was speaking broadly to all the new list members.
On the Bitx40 web page I found this:
" The BITX boards are hand assembled by a collective of
By
Ken N2VIP
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#115851
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Re: sbitx v3 issues
Hi Ken,
I'm far from being a new member, I've been here since the very first Bitx came onto the seen. Most all radios HFSignals has produced are *NOT* hand assembled, only the coils and final
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Joel Caulkins/N6ALT
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#115850
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