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Yeah i bobbed the PAs out of all my BIT radios and use that 20W pa. Its got great specs and the semi-kit only cost about $20 plus shipping. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ

I have a lightly used SBITX V3 for sale.? I had replaced the original board with a new one, due to the low output on 20 meters.? the new board resolved the issue.? I was able to fix the old board

JJ, very helpful, thanks. I have an unmodified V2 but with the bidirectional-zeners installed on the gates pf the finals. I need to check it and these instructions are helpful. (Yes I know they are

Hi Mike, Have you looked at the K9HZ amp that is part of the T41 project? /g/AmateurRadioBuilders/message/2721 or https://github.com/DRWJSCHMIDT/T41 This might meet your

Sorry, I should have been more specific. I'm looking for data for the entire Tx chain. -- Mike - K8MCB

Does anyone know of a singular source that documents the specs, performance, etc. of the sbitx v3 PA stage? It appears to be a fairly flexible design and I was considering it as a potential candidate

Würde mich auch interessieren. Gibt es schon irgendwelche Infos?

More power to you. Remember in the "thermal cascade" the JUNCTION of the device is what counts. Needs to stay well below 175 C at all times. Mosfets have a problem with a localized heating effect

I am a programmer, and the fact that the radio has a built in RPi was the point that sold it to me (together with the bands covered, features, power level, and portability). I do have an antenna tuner

The discord server has answers to your questions..? ?:) > > >

See https://github.com/drexjj/sbitx/wiki/sBitx-Hardware-Calibration

ps.: There is one sentence missing from the previous message: for the EZ Data operation you will need a USB stick, which is advisable to store in a safe place so that it is accessible when needed.

James, The original sbitx.db stores the log content, so you didn't lose anything at 0 QSO. The hardware_settings.ini file contains the drive scale required for your device to transmit. If your

Hey Travis, Yeah, I’m thinking the same, actually. The issues I see are: * Interrupting receive audio to get speech from Orca/Speakup/whatever * Input. USB keyboard perhaps? Because I don’t think

Jsem ve fázi ?ivota, kdy jsem si myslel, ?e mám v?echna rádia, která jsem kdy chtěl. Dokud jsem neviděl zBitx. Mo?ná pot?ebuji je?tě jednu.? 73 Michael N4MJR

The power output is proportional to the square of the drive number I always come up with my own calibration numbers by starting with the power set to maybe 30 to 50% and measuring the output power.

To upgrade the RPi in the zBitx will 'require' repackaging the radio, as the RPi it ships with, an RPi Zero 2 W is about half to one-third the volume of an RPi 4 or 5. The RPi Zero 2 W has the same

David, I believe it piggybacks the real time clock modules I2C pins and power pins. Joel N6ALT

Buddy. I'm figuring we can just install espeak/orca on one of these radios, and have complete speech access that way.? It's possible we'll need to swap out the raspberry pi board, to either one with

Hello. Wondering how important the original sbitx.db and the hwini files are from the original disk I got when I purchased my unit a few years ago? Before you ask, I DID back up those two files to a