Likely no as its too great a change to the Raduino and the ubitx. The existing version is at best good for 8 bands if one uses TXA,TXB,TXC as a binary band select along with an external decoder chip l

Very simple the 7805 and kin are linear regulators and at 500ma the max voltage that can be tolerated before the power dissipated as heat is about 1.5W which places the input voltage at not more than

Sumit, You grossly over voltaged the LM386 audio amp. Other parts are likely suspect but start there. Start at the speaker and work back. FYI: the only parts that would tolerate more than 15-16V would

Gordon, Short form no. The 6146 does require power to the grid to run though small. the key thing is you need 25-50V p-p of RF and to do that across the grid resistor and the 10-20pf of input capacita

Farhan, Still around and busy. Check out OZ1PIFs work. I've run one section of that a 4x4 parallel push pull on 6M to over 200W. The yabut is you need 28V power at 15A! At 12V that doesn't work well.

OK, staring from a point of experience... First serious and decent amps in the 100W and up class even if home built will cost not less that 2-5$/watt. There are big metal parts and expensive transisto

Running th efinal at high power with 100ma bias means that at 12V your heating them at 1.2W no signal. Bring that up to 24V and its 2.4W of heat. To run at higher voltages you need to insure the heats

Its not personality it is a measured thing nor a red herring. The question is V5 fixed, it has the relay fix and generally seems a bit better with more of them seemingly behaving better with IF fixes.

All my Aircraft headset are 600 ohm nominal for speaker and mic. [include DC, Plantronics, and Telex] They should work fine. for RX audio and note some are Electret or dynamic and the levels can be ve

#ubitx

Brad, In the past every time that issue has been seen it was the 40 low pass filter having wrong components installed at assembly. Other wise the issue would be evident on other bands. Generally the p

#ubitx #v5

Alwaus do what the book says, they may have slues you don't. Sound like you not zero beating or the adjustment is not being kept. FIrst the Main cal must be done so that the actual frequency of the BF

#calibration #ubitx-help

Yes, roger beeps are common on CB and VHF/UHF FM repeaters. Its not a legality issue just not needed for SSB. Allison

#bitx40

Where I stand on loops: Based on design work and in use. Loop antennas are useful either in the wide band receiving only type or tuned transmitting type. They are not close to full size dipoles in per

Alan de G1FXB Jun 1 #69407 I recall you done antenna R&D. Yes, I did for a commercial firm that was biased toward research and specialized designs. EH antennas, based on work and research are a great

N8DAH, Boards are easy for the EBY amp. FARCircuits has them. Its a good design and allwos for getting good performance at higher frequencies. Mine with a little effort does 37W on 10M (1.8W drive) an

ITs cleverly hidden... T1 and R4 and 3/4ths of the bridge the antenna is the other leg. The centertap of the transformer will have zero RF(noise) if the antenna leg has the exact same resistance and r

Bo, I have the Palomar noise bridge unit and its a very useful tool. Worth way more than the price I paid for it (1$ at a flea). Allison

I would ask questions like: What is the DC applied voltage during TX? It sounds low for CW even. For CW I'd expect near 10-12W however if you Power supply is below 12V what you are getting is then goo

#ubitx #ubitx-help

A SWR of 1:1 is easy with a dummy load but as a radiator its efficiency is very poor. Some antennas can be matched to a good SWR and still be poor radiators. SWR is not a measure of antenna effectiven

Radiation pattern of the reference antenna EFHW varies with frequency. Loops however are very predictable and the pattern is well understood and does not change with frequency until it no longer a sma