Give or take, it’s approximately 50 ohms

#antennas #ubitxv6

Hi What is the RF output impedance of the uBITX, v6? just became owner of the new baby, soon QRV, I hope :-) vy 73 de OZ6TI

#antennas #ubitxv6

belthur, One other thought, The RF could be coming in through the mic cord. A snap-on ferrite and 0.01 uF bypass caps on the input to the ubitx could help if that is the issue. 73 Evan AC9TU

#ubitxv6 #antennas

Are you amplifying the mic at all? Do you have another receiver that can be used to verify the output of the ubitx? The only way to be sure is to measure the output. What I have done is build a -50 db

#ubitxv6 #antennas

Checked. CW is just fine. How do I avoid audio overdrive?

#ubitxv6 #antennas

Thanks. No, my uBitx case isnt grounded. I will fix that. I will also try a Balun. Thanks.

#ubitxv6 #antennas

My first guess would be RF back into the ubitx. Especially since it is with the linear amp on. Do you have the ubitx in a metal case, is it grounded, do you have a common mode choke on the coax to the

#ubitxv6 #antennas

Added a 20m antenna to my Inverted V already having 40m. Now, I have 7150 in VFO:A and 14220 in VFO:B. When I give a TX, it will switch over to VFO:A in the middle of TX... If I have 14220 in VFO:A, i

#ubitxv6 #antennas

Okay now I will tell a story - I first saw and used an automated VNA around 1979. I will still a EE college student, but had a work assignment at a company then called RCA. The VNA from a company then

#antennas #v6

Nano VNA is a nice tool to learn and build antennas. Comes with inbuilt battery that lasts easily for few hours. Bit delicate in build and not rugged for field use, especially if you buy the one that

#antennas #v6

A SWR meter is all that is needed to adjust simple antennas. However the nano VNA makes it easy to see where the antenna is resonate. You can take them out to the antenna so you do not have to go to t

#antennas #v6

Russ, All true until you get high enough and it starts going down. I'd describe it as higher the closer to 70 ohms (natural impedance for dipole). Also at less than .25 lambda the impedance is lower t

#antennas #v6

As the antenna raised (or lowered) from ground . . . the impedance changes. The closer to the ground . . .the lower the impedance. Higher from the ground . . . the greater impedance. You need to adjus

#antennas #v6

Okay nice John, i orderd 1😂😂

#antennas #v6

I built a 20/40 dipole and was really struggling getting the resonance points where I needed them to be using my radio and SWR meter. I finally ordered a nanovna and was able to dial it in quickly han

#antennas #v6

Okay to all thx for reply, and for Herman...ik ben ook weer begonnen na 35 jaar...nog geen N maar heb wel boeken en online cursus maar door drukte in huis door corona, kom ik er niet aan toe. Ben af e

#antennas #v6

It will re-acquaint you with the Smith Chart, something you have always wanted :-) I got one because it measures VHF/UHF SWR. I have other SWR meters for HF. I will learn about +/-j and Smith charts n

#antennas #v6

Do it Rene. They are not very expensive. You need some time to learn how to do. I am back in om business after 35 years other things and hobbies. In that time i used a big 5 el.rotary hf beam and work

#antennas #v6

Rene A nano VNA is inexpensive enough that I won't work hard to discourage you from buying one. Let's just say you can build a good antenna for HF without one. An SWR meter can tell us if our antenna

#antennas #v6

Hello i am thinking to buy an NanoVna analyzer. Maybe somone has experience with the Bitx and anayzing his antenna etcetc??? Regards Rene Netherlands

#antennas #v6