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Date
Re: Homebrew li-ion battery pack into ubitx
Yes, I put one of these inside my ubitx20 rev 5.1 (tied down with velcro strips) and it works well.? The battery is fairly compact and comes with its own charger that has a jack that fits the Radio.
By Rick Muething · #67886 ·
Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio #ubitx-help #ubitx
The 60mhz version at $124.29 only does 60mhz on sine wave generation, everything else is the same as the 30mhz version at $116.29 Makes sense, they can put a low pass filter on the output to extract a
By Jerry Gaffke · #67885 ·
Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio #ubitx-help #ubitx
Banggood has model FY6800 in the 60mhz version (max sine wave output freq) for $124.29? The FY6800 30mhz version does not save you much money. Gets good
By Jerry Gaffke · #67884 ·
Re: Opinion question on new build #ubitx #nextion
My uBITX is due to arrive by the end of the week and, like you, my head is full of ideas from trolling this group and the rest of uBITX on the net..? repeatedly I hear what Evan is saying.. I have an
By Bill Lamm · #67883 ·
Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio #ubitx-help #ubitx
I wonder whether the O P has used 4k7 resistor between key wire and 5v vcc( blue and green wires)? [email protected] wrote:
By MVS Sarma · #67882 ·
Re: Homebrew li-ion battery pack into ubitx
For a small pack with limited current, Turnigy makes a ready-built protected 2.2Ah pack for $25 https://www.amazon.com/dp/B00USRD91W/ref=cm_sw_em_r_mt_awdb_4muTCbG8JHMRP Especially for newer
By N1EDC · #67881 ·
Re: i2c signal meter/analyser/dsp/cw decoder
Thanks Vic, I modified the GUI from- ubitx_35E6.tft to ubitx_35_E.tft and its solved now... Non the less I only get half of the nextion screen filled !! Regards, Sourav Sent: 15 April 2019 10:56
By Sourav <sourav.relja@...> · #67880 ·
Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio #ubitx-help #ubitx
Raj, perhaps you got what i was suffering. Regards Sarma
By MVS Sarma · #67879 ·
Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio #ubitx-help #ubitx
There is one with model number 6800 which is better and cheaper at Banggood.
By Raj vu2zap · #67877 ·
Re: i2c signal meter/analyser/dsp/cw decoder
Vic and Sourav, thank you for posting this as I have the exact same problem... thank goodness for this forum! 73,? Kelly K5AID
By Kelly Mabry <kmabry2007@...> · #67876 ·
Re: i2c signal meter/analyser/dsp/cw decoder
To get? those extra buttons and some other updated features like the CW speed arrows on the main screen you need to update the Nextion GUI. Look for "UBITX_Nextion_GUI_V3.zip" =Vic=
By Vic WA4THR · #67875 ·
Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio #ubitx-help #ubitx
I really like the idea of taking the antenna connection and jumper to each of the inputs to the IFs, That is a low cost white noise signal generator.? Let us know how that test goes. 73 Evan AC9TU
By Evan Hand · #67874 ·
Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio #ubitx-help #ubitx
There is another thread on Groups.io that follows a similar problem.? The pictures of the clock signals as taken on TP12, 15 and 18 are on this post: /g/BITX20/message/63509 When
By Evan Hand · #67873 ·
Re: ubitx mobile in a car
Mobile antennas are what they are. I am not an expert on these as well. But I have noticed that putting a board for Manhattan style homebrew stuff (say 30*20cm) on the roof and soldering this board to
By iz oos · #67872 ·
Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio #ubitx-help #ubitx
Also Q90 could be shorted base to emitter, this is the first driver stage and is in the RX/TX path if bad it will short both incoming and out going signals to ground. Check at TP2 at the junction of
By Skip Davis · #67871 ·
Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio #ubitx-help #ubitx
Sticking an antenna at the input to the various amplifier stages of a receiver is a good way to debug, not much in the way of tools required. Start at the audio power amp and work back, the noise
By Jerry Gaffke · #67870 ·
Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio #ubitx-help #ubitx
Jens Great progress all around. As I remember your failure was sudden, maybe no smoke or odor. Losing both transmit and receive, I am thinking it might not relate to PA failure. I have jumped to
By Curt · #67869 ·
Re: Homebrew li-ion battery pack into ubitx
18650 cells from laptop batteries. I'm planning on using this to power my uBitx. 4S3P pack I just built. I haven't sealed it all up with Kapton tape yet. wrote:
By Gigabyte · #67868 ·
Re: diagnostic guide for uBitx v5? #ubitx #ubitx-help
Jens sorry about your malady.? since there are only a few changes from v3 to v4 to v5, I would start with that data.? the largest change in biased parts between them is the audio amplifier.? all
By Curt · #67867 ·
Re: Finally started construction #ubitx
Hi, This is a good reference for things you can do too: /g/BITX20/message/67464 73, Mark.
By Mark - N7EKU <n7eku@...> · #67866 ·