You mentioned "on Dummy Load only 10-11V", is that your power supply voltage when transmitting? The power output is very dependent on the voltage to the PA line, and if your power supply sags to 10-11 volts when transmitting then you will only get maybe 60% of normal power. Similarly, if you increase the voltage on the PA line youcan get more than "spec" power. It is a good idea to keep the main board voltage at 12v or less to avoid overheating the voltage regulators, but that is why there is a separate line to the final amplifier.

=VIc=

V4: One you do the spur mods these should reduce or go away!

Raj

OM

how is your output power on CW?? take power readings on CW even if you don't use this mode.? this will tell us how the PA etc are working.?

some experience weak audio drive that hampers SSB transmit power - a few in our club build.? I am fortunate that using a surplus speaker microphone I had works swell, but others are not so happy.? some are adding a preamp or even a speech processor IC to their audio chain.? I think you need some patient experimenting, after affirming CW power is okay.

if you have a different microphone to try - I would.? also consider building an audio oscillator as a test source.?

73 Curt

Congrats on turning it loose Don, those are some really nice results.? I'm envious of your antenna doing so well without a tuner.? I hadn't noticed those pie charts before, but yes 30m is a pretty good band these days, for small bandwidth work at least.??

Thanks exactly what I looking for......?

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Good idea. It bugs me too when I power off the radio and the raduino is still on. It powers the radio too because when I have my pan adapter hooked up I can still receive signal, just a little weaker. It’s so weird.?

I need your Help, reaaly no Idea for this low, very low Power Output..

...if there is an way, an idea or something i could do it was not described in any post till now or i read it not because i have read all post for this "low output power" issue what i can read in this forum, but i find difference things was write there and i look to make all i can test or put like these post was saying.. but nothing get right..

My problem is the output transmit power, get only 4W on 80m, 3-4W on 40m/20m and 1-2W on 15m/12m/10m and the messuare was take by Dummy Load and on Antenna the Value is the same so there not different and i have on 80m only 2 Qso and 40m only 1 Qso till now with many Antenna testet and other Band testet but not heared by other ham so same by test with websdr.com try to hear me, but there was nothing able to hear me..

so the test on RV2 and RV3 with fully clockwise: Rx only is 150mA, Tx PTT only without speaking is 380-400mA?
when set on RV2 and RV3 for each on 100mA, both together 200mA to the 380-400mA then i have 600mA PTT no speaking when the Bias setting up like it should sayed on hfsignals.com but now when Tx PTT now with a load Hallooo to the original Mic Cap, then the Current is 1Ampere but on Dummy Load only 10-11V and on Power Meter 3-4W and when set RV1 to max power at fully counter clockwise then 5W getting but overmodulation so i seg RV1 like half way like it was before.. now i have test the Q90 Transistor in no Battery,no Power up Ubitx for shortet Transistor but it does not give a short with dvm test or should i test it in other way?

The Q90 was my only idea to try a new on in TO-92 solder in but i don't know if i should do this or should test other things..

The R63 resistor i have read can be reduced to 22Ohm for more mic audio.. but that should not give the issue away because on CW my power output is the same low value at the bands and on 80m get 3-4W cw on 40m 2-3W and than it goes lower,too .. on higher bands like 20m,15m,10m it was 1-2W..

What can i do, WHAT SHOULD I DO? I want only the normaly power output like on hfsignals.com saying and the other user would have..i want it too..the normaly power..this is all i want, please..

The ubix, when it have at one day should have 10w on 80m and 7w on 40m and 20m, than i would be lucky as hell but in reality the ubitx should have this 10w on 80m and 7w on 40/20m or have i fucked something up in readi g this information all there was saying by the motly ubitx users they have this minimum 10w..?

I have good Receive, very good sounding and the only thing whit trouble is the power output is too low and thats all i would be have missing would say, when this issue gone cleaned up and the power output is on the right value with 10w my ubitx would be very best Qrp Transeiver for me and i'am lucky when dreaming of this many days outdoor transmitting i would love so much with this lovley little machine.. i have so much love to give kn this ubitx and i thought for many upgrades would be present when the transmitting output issue was done in right setting, i would upgrade things like agc, s-meter, cw-filter, battery-case, speech-ic, integrated qrp tuner with swr meter, these are the things i have here for waiting to build up and put in the ubitx..

So my project only make trouble in one point where i have no idea..

I finally got around to putting KD8CEC's outstanding FW on my V3 ?BITX.? When I'm not using the rig for other things I leave it on to rx WSPR.? Using CAT control for band hopping is fantastic.? I did not want power over the USB cable going to the raduino when the rig is otherwise switched off or at all for that matter.? There may be a more elegant solution but as they say, done is better than perfect.? I stripped back the insulation on the cable, parted the shielding, and like a B movie bomb tech I cut the red wire.? With a little heat shrink on the cut ends, some copper foil to repair the shielding, and electrical tape to replace the outer jacket it looks good as new...from 100 yards :)? I realize this isn't a revolutionary break through but I figured it was worth sharing.
--

My uBITX v3 has been sold.? Thank you all for looking.?
73, Rod WA9GQT

On Fri, May 17, 2019 at 09:15 AM, Don W wrote:

I'm just discovering the Antuino and reading a bit about it. Is there a source for a kit or, at minimum, the pc board?

Still scraping the egg off my face..totally missed the obvious link on the hfsignals page.

You can find historical documents on the original bitx20 at
They date all the way back to some of the original boards.
Leonard

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Do you have a link to this video?

OM

the most difficult to source components (crystals, toroids, etc) can easily be seen here.? the other parts are more common, except the new v5 suggests using some VHF NPNs in the 45 MHz amplifier.? I don't know if there is a documented parts list.? Most of us purchase a circuit board kit to assemble and modify.?



Curt