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A suitable one made by Bourns is available from Digi-Key. Their part# is PEC11R-4020F-S0012-ND and I've used these with my various uBITX radios since day 1. Not terribly expensive either, I believe

Can anyone give me a pointer on where I can purchase a replacement encoder for the Ubitx Thanks 73 art - n2ajo

Yes, I keep trying to forget the yahoo mess. There are a few there most I unsubed from.? The only ones there of interest is EMRFD, COSMACELF (1802 cpu), R2PRO. There are a few other with high noise

As a daughter board it would fully replace the back half and its a non-trivial effort. It could be done in? the same width but the depth would have to grow. Ways to make it smaller would be careful

Oops, the photo!!! JR

My latest build, using a? Context Engineering (Fry's Electronics) case.? It's a tight fit and not for the beginner.? I had to "mill out" (dremel) areas for the stand offs.? We also chopped

I realized this early when the uBITx first came out. It was a very easy fix to simply decommission the filter networks on the uBITx, use an external filter network that accepts 4-bit binary band code

Allison and Scott Thinking old-school raises the question about using a broadband transformer to raise the MOSFET output impedance up to around 5K and then use a Pi-network as was done in ancient

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There is a good example of such an old school preselector on the AA3SJ Progressive Receiver Page, I think originally designed by W3TS (?). Pretty much exactly as Allison describes, 2 bands, total HF

Arv, That was a narrow cut. ;)? It would be the 1M band based on blade length. It was a narrowband effort using a .9mm blade. Its my signal slicer...? !groan! Allison

That would add some more knobs and possible operator errors but it is an? interesting thought.<<< Old school: A pre-selector.? The form for tha tis a double tuned circuit with top coupling between

Allison Attempts at humor rarely work well on-line, but I have to ask... "What band is your band saw designed for?"! 8-) Arv _._

Allison I was afraid of that. This daughter board idea is getting larger and larger. Arv _._

Arv, All the way to the 30mhz filter.? The first step is inset a set of band pass filters. Basic scheme is make the board linear layout as you want the input as far as possible from the output with a

Has anybody looked at making those multi-band filters into tunable BPF designs? That would add some more knobs and possible operator errors but it is an interesting thought. Arv _._

Alison Assuming we could build a daughter board that replaced the RF PA section, how far back in the TX path would we have to tap in to drive this board with a relatively clean signal? Arv _._

Warren I will leave the forklift upgrade to Farhan and his elves in India. Maybe there will be a MK-II version of the uBITX someday? I was wondering about the LC traps as a mod for existing uBITX

I have a Bitx40v3 that hasnt been getting much use since I got my ubitx.? I have been thinking about using it for digital modes, but before I do, I need to get firmware on it that will support CAT

Warren & All, Unfortunately the findings of Alison and others are dispersed over many different titled discussions. The topic of spurs / spur reduction has being raised just in the last couple of