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Yes, I understand trying to keep the cost of components down, but after further research, and my own experiences with a few bitx products, why keep chasing down a design around a MOSFET not intended

Amazon and AliExpress sell sealed buck boost regulators from 3 Amps to 30 Amps from about $5 to $50. They are pretty much bulletproof. Output voltage is chosen by the unit selected and input is from

You might want to look at some of the DROK buck converters.? I think they have one that will do what you want, & they are very power efficient. Gerry Sherman Sent by the Windows 11 Thunderbird

I think you'd be best served by using a regulator to turn 13.8v into 9v, rather than trying to redesign the radio to natively run on 13.8v. I imagine a suitable circuit could be installed in the 18650

Hello, we haven't received any zBitx yet and I'm already thinking about modifying something. I don't really like the fact that it goes to a maximum of 9v, and I would like to know how to modify the

Okay, I'm interested. Where is the site to order from? -- Mike - K8MCB

This the complete Sbitx as built, the only 2 changes are the upgrade of the Raspberry Pi 4 from 2GB memory to 4 GB memory and the master board was upgraded to a newer model to resolve the low power

Hi Tom, Is the case included?? Any other items that are included, like the mic and display? 73 Evan AC9TU

Hello! while waiting for my zbitx to arrive, and after reading the sbitx manual, I can’t find a reference on how to use a manual tuner in order to keep the finals safe. I have a Chinese zmatch qrp

Here's a link to the discussion: https://discord.com/channels/1026361918505635890/1333220374376353893 It's a very simple mod. You'll need to print the holder and some jumper wires to go to the RTC

Just FYI, it shows that I'm out of stock, I do have 10 more on-hand, I just need to finish assembly. I should be able to get most of them done tonight and the stock updated shortly. Jeff - KF7YDU -

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