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Used to use a lot of them in repairing audio gear in the 80's and 90's. We got them from MCM Electronics then. Probably discontinued now, so probably have to get them off Amazon or eBay. Google shows

I would look at old 10 & 11M equipment. The NTE equivalent is a NTE 85. Good luck, Marco - KG5PRT

Where does one get a 2SC945?

Thanks Michel, I don't have my smeter together yet but I think I can fix this problem pretty easy. It should go all the way out to the +20, did you calibrate your s meter using Ian's procedure?? I

With RX voltage of 13.6, the Q70 collector voltage is 4.67 on the 2sc945. I should mention that I added a 16K resistor from the base to ground when Q70 was a 2n3904, which was suggested by W3JDR to

Yes, an RF probe is a good idea to have around when debugging a uBitx. That looks like a reasonable circuit, but good luck finding a GEX66. Seems to be a germanium point contact diode from 50 years

Its back on the market!

Hi Gordon, I measured mine without any load and I had way too low output level on CLK2 and CLK1. It was a bit dependent from the frequency I tune in. Then I modified the code in the ubitx_si5351.ino

Hello Allen. Very good the file for the Nextion 35 B. I noticed a small problem: The S / Meter never exceeds the S9 even on a very QRO signal. It looks like it's stuck at S9. Thank you for the work.

Mike UBitx Manager is intended for use with CEC firmware, not the factory default firmware.? It cannot connect to the default factory firmware, as the manufacturer does not include any handlers to

Build yourself an RF Probe such as at: http://www.qsl.net/g3pto/probe.html <http://www.qsl.net/g3pto/probe.html>. You can use it to trace the signal (or lack thereof) through the transmit path. Clark

Mike HDMI would imply that the rig has a video output, which is not the case. uBITX transceivers come with a 2-line LCD display, but many have modified theirs to use 4-line LCD or various size Nextron

I will take it. Sending payment via PayPal. Mike AI4NS

New here, waiting on my ubitx to arrive. I have been reading the postings, and was wondering about HDMI display support. I have been getting to know the rpi and it has HDMI support. Is HDMI possible

I watched a bunch of youtubes, and tested the IRF510s with my DVMM.? They flow only one way between two pins, so they appear good. And the voltage on the pins is close to expected values. So I have

Tom, What voltage do you get at the collector of Q70 after the mod ? Always solder with full length pants! :-)) Raj

PayPal, mailed check or USPS moneyorder.? Email is last name at Gmail.

What do you take as payment? wrote:

That looks like a cool mod. I tried a darlington pair in place of the Q70. That works as well. - f [email protected]> wrote:

Q70, the audio pre-amp, has a really big job in the uBITX and sometimes gets overdriven by very strong signals. Plus, since i replaced the 2822 audio amp with an LM380 I've lost 8db in audio gain. ?I