#ubitx-help #ubitxv6-help HELP NEEDED - Yesterday as a result of a suspected low RF output of my ubitx v6 I built a 50 ohm Dummy Load and Power meter My suspicions are now proven correct in that my RF

#ubitx-help #ubitxv6-help

John, Before we go too far, can you tell us if your uBITX has worked in the past, or have you had this issue since you completed assembly? Also, can you tell us the band and or frequency that you are

#ubitx-help #ubitxv6-help

Evan, I believe you have touched the nerve on this one. Some new to the hobby may not realize right away that if there is no modulation on SSB, there is no carrier and no indication of RF output on a

#ubitx-help #ubitxv6-help

okayJohn, i had the same problems. Mic wasn't working, and the freq was out totaly wrong. Get many tips from guys who are a lot better with elektronics then me. But, after calibrate serveral times....

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There's a nifty device made from two 555 timers or one 556 timer called a "pulser tuner." You should be able to find the schematic online. It gives about a 40% duty cycle at something like 120 Hz... f

#ubitx-help #ubitxv6-help

If using the mic input to do tune-up keying, keep in mind that is is not necessary to go full volume. 20-30% of full volume should be enough to at least give enough RF out to do an initial and probabl

#ubitx-help #ubitxv6-help

Hi folks. I know the power on the output of the uBitx is expected to vary, but using an oscilloscope, I am reading around 10W on 80m, then 2.5W in 40m, 3W in 20m and 1.5W on 15m. I did not measure abo

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rafaelgcpp@... wrote: Hi Rafael, Your scope is probably responsible for part of that decline at higher freqencies. The 25 MHz rating may be optimistic and in any case it does not mean the scope

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As you probably know, you should have your scope probes on the 10x setting, not 1x. Will do a lot better at high frequencies. If your dummy load is something small like a 5 Watt resistor, you can get

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Hi folks, Although my setup used a berillium oxide resistor as RF load and the oscilloscope probe was set to 10x, I took your advice and built an RF probe, using metal a metal film 1/10 divider, a 100

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Rafael Also possible your 40m dip is real, as my v4 had this problem. I am not trusting my memory, but there is a capacitor in the driver network that in rare cases needs adjustment to get over 5 watt

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Hello, I'm in a bit of a pickle and would seriously appreciate any guidance that might come my way. I recently purchased a U-BITX V6 XCRV, after assembled I powered on the unit and was met with plenty

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KN4VCT, I would suggest you start with a static voltage test around Q90 when transmitting, no audio. That test has been the most used to verify that Q90 is dead. If the test does indicate a dead Q90,

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Your the man! Thank you very much, I will check it out and report findings👍

#v6 #ubitxv6 #ubitxv6-help

Ok... New development. So I haven't checked voltages yet. I did notice however that's the antenna jack shows as a dead short on my vom? Is that normal? I thought it was my coax but it shows continuity

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Cw power output seems ok as well by the way.

#v6 #ubitxv6 #ubitxv6-help

Again you attached the messed up and edited doc of mine! The excel file in the folders section is updated.

#v6 #ubitxv6 #ubitxv6-help

That is normal. Not an issue. Raj

#v6 #ubitxv6 #ubitxv6-help

Raj, I apologize for the old/corrupted pdf of the voltages file. It is what I could easily find on my computer, as searches in the Files section is difficult unless you know the exact name of the file

#v6 #ubitxv6 #ubitxv6-help

Evan, I have updated the file since first upload. The first one had some mistake/omissions that has been corrected. You should make a pdf of the current version before posting as things may have chang

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