Re: Audio feedback during transmit?
#ubitx
Excellent solution, does it also remove the thump?
By
iz oos
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#52402
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Re: Nextion Displays >> warning
Ade
You will be interested to see that I now have my 3.5" Nextion Standard screen working.?? Just needs to be installed properly in the front panel.
The hard work in upscaling graphics and
By
Mike Woods
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#52401
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Re: Homebrew from scratch
#ubitx
I am also working on a similar model of Modular approach.
But I am working on a concept of Plug-in modules. I have already created some of the modules which when ready will be plugged in a Base
By
Charudatt Uplap
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#52400
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Re: Nextion Displays >> warning
Mike, many thanks for answering my question and in great detail. I think I have some playing around to do. At least it will keep me out of mischief.?
73 Ade M0OJR
By
adelolly07@...
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#52399
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Re: Low RX Audio
#ubitx
Check the obvious first. From the antenna input to the audio. So check
first the stage from the antenna connector to the lowpass filter.
By
iz oos
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#52398
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Re: Nextion Displays >> warning
Somebody has already resized the graphics for the 3.2 inch version (by upsaling the 320x240 images.?? But so far, no other versions are available.? I imagine a number of other sizes will become
By
Mike Woods
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#52397
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Re: Nextion Displays >> warning
This may be a silly question folks, but will Ian¡¯s files work ok on the 3.2 inch version?
?Ade M0OJR
By
adelolly07@...
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#52396
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Re: Nextion Displays >> warning
Joe
I'd be interested in what you will do with all that real estate on the 7"!
Mike ZL1AXG
By
Mike Woods
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#52395
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Re: Homebrew from scratch
#ubitx
uBITx v5 (although it may cost a bit more with all those extra connectors)
M
--
Mike Woods
mhwoods@...
By
Mike Woods
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#52394
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Re: VOM Advice?
Oh there's no doubt that as a disposable meter, they're fantastic. When I needed one the other day to help figure out what was going on with my daughters car, I hooked one up to a 12v accessory plug
By
Ryan Flowers
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#52393
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Re: RF power chain mods and improvements..
Take a look at this post:? ?/g/BITX20/message/51448
where Allison suggests replacing all three of Q20,21,22 on the transmit side.?
A bit surprising, but then we need a fair bit of
By
Jerry Gaffke
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#52392
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Re: Microscope - - new thread
I've found this to be very handy for the
By
Dennis
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#52391
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Re: RF power chain mods and improvements..
I might try using the MMBTH10 here too,? I have quiet a few of them...
Which 3904 would we replace?
Cheers.
By
Nick VK4PP
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#52390
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Re: RF power chain mods and improvements..
OK, you guys are getting serious.
I'm moving the discussion back into the power chain thread so I can find stuff later.?
In post? ??/g/BITX20/message/51743? ?Allison mentioned
By
Jerry Gaffke
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#52389
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Re: Nextion Display vs 1602 LCD - Current Consumption
#ubitx
I had perhaps indicated that i generally tie the backlit of 16*2 to
unregulated supply by increasing the series resistor.
regards
sarma
vu3zmv
Regards
MVS Sarma
jjpurdum@...>
By
MVS Sarma
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#52388
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Re: Low RX Audio
#ubitx
Ok. Using the output of a dds generator and different attenuator blocks, to
get the same audio out at 10m had to reduce att by 20db compared to 40m.
So what section should I start looking for the
By
WP3DN
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#52387
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Re: LA4425a Audio power IC
We're using the 7W TDA7266M chip and are pretty happy with its performance.
Jack, W8TEE
By
Jack Purdum <jjpurdum@...>
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#52386
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Audio Amplifier Module with Digital Gain Control
Hi:
I've built a few BITX rigs from scratch now and I'm starting to move to a modular approach using fabricated PCBs to make it easier/faster to build/mix/match the stages.? My audio amplifier
By
Bruce MacKinnon KC1FSZ
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#52385
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Re: Topic change
I tried a BFR93a (because i had some) for Q90 which seems to work OK.?
glenn vk3pe
By
Glenn
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#52384
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Re: LA4425a Audio power IC
Hi Roxie,
I have used the LA4425 AF amp in a home-brew transceiver, not the uBITX. It's a very simple part to use and seems to work very well. Very few parts required around it. Just being cautious I
By
Glenn
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#52383
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