Check R2, probably a wrong value. See if you have an PCB hair line short, hot the board up to a strong back light and see if you spot anything! Raj

Could not find the circuit, could you share so we can look at it and see what may be the issue! Raj

Welcome, I feel that there are lot more features to come in Antuino hardware V2. Specially built in attenuators and more accurate db/swr readings. Raj

You are welcome to join my HOMEBREWERS at Groups.io and talk any radio topic! Its a low traffic group. Raj

Check the high band relays! Raj

#ubitx-help

What you read with antuinos In-Out direct connected is base number. If you base is -21 and you get a reading of -26dbm then your loss is 5db I wish I has an antuino 30-40 years back! Have fun

You should check if your unit needs a mod.. connect in to out and see what is the dB reading in SNA mode. if more than -20 i.e -17 or -14 then you need to do a mod listed in the antuino group. The rea

Ooz, Join us on the antuino group.. Set your center freq, select SNA mode. Connect filter input to the top (antuino OUT) connecter and filter out to bottom (antuino IN) connector. click Plot. The plot

Probably the wire from your add on circuit and the volume control is picking up RF. Try using a shielded wire.

Probably antenna damage in the storm. High SWR may cause this. Raj

Oos is, The version in uBitx is printed near the antenna output jack. Raj

I've tried similar ones and they DONT work. The issue with the original toroids is that their leads seem to pick up TX signal and cause a mess. Change the relays and you are almost there. Use SHIELDED

#parts

https://hackaday.com/2019/09/18/hackable-ham-radio-multitool-contributes-to-long-term-survival-of-the-hobby/ Cheers

What I am saying here Hans is that 0dbm is no use to check an Antuino unless we have a 20db attenuator. Calibrator will be useful for the Antuino between -20 and -80 Just like you are using a clock os

Hans, AFAIK the Antuino reads from -20dbm to -100dbm at the input. The IF amp amps the signal by 30db making the -20dbm at input into +10dbm at the AD8307. The sketch takes care of the maths. Any high

I am sure instead of an acid trip they got acid reflux!

Roger, Take the two antenna wires black and brown and twist them to minimize radiation and solder the black to the SO239 ground tab and brown as you done. Keep those wires as short as possible. Do the

Chris, The power connecter leads have to be resoldered on BOTH sides of the PCB. The reason is that PTH has been drilled out wile fitting the socket. Raj

Just replace the Nano and see. While desoldering leave the pins on the Raduino board and remember to order a Nano without soldered pins. Use some help if you are not confident! Raj

If Q90 was blown then D1/D2 could be blown.. replace. I had a bad solder on a test board. Raj