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Doug Hendrick's recently published a dropin pcb replacement for the 42if123. He was learning how to make boards, and this was his project. He documented it in the qrp-tech files area, under KI6DS.

There was quite a bit of interest in this over in the FB group, so thought I would consolidate and add here. The project is call the "duinovox" by KB9RLW. I built this very simple, low cost circuit

Hi all, I'm puzzling with the Sweeperino. After many hours of trying I cannot make it working. I took the Sweeperino software from the Razzies website

Dex, I find if I reply on Eudora without trimming the trailing text, the groups.io strips the whole thing. If I trim below the signature and remove the dah-di-dah etc.. terminator, then the whole

I am with you Jerry! Without the relevant lines quoted, it becomes impossible to know to whom or what that reply is about unless I read on the web. Mostly I ignore these mails. Raj

I am using the schematic from: http://www.phonestack.com/farhan/ubitx/ubitx.html ( http://www.phonestack.com/farhan/ubitx/ubitx.html )

Here's the post about replacing the LC BFP wih a crystal filter: ?/g/BITX20/message/30538 ( /g/BITX20/message/30538 ) I remember that one. Don't remember any mention

Added another accessory board to the rig. Built up the duinovox by KB9RLW. It works great for FT8 even with the bodged wiring for testing. The VOX is cheap and easy to build.? and the board plugged

Sorry and thanks, John B (did you get "sloop" all thru school?) - I stand corrected and informed - though there are more analogs than just bedsides :) 73

I gave those a value of 0, to indicate that those capacitors are not needed. That said, i havent found time to update the circuit, essentially, the new version uses four LPFs instead of two, a 45 mhz

Thanks to all that responded. Great information! 73, Chris w0anm

An analog radio, Dex. An analog one. john AD5YE

What, you don't have an old no-longer-functioning AM/FM bedside clock/radio in the junk pile? Shame! :) 73 ... Dex ZL2DEX the dumpster-diver who has 2 ATM.

This page has a few suggestions for alternatives:?http://www.pa3hcm.nl/?p=1337 ( http://www.pa3hcm.nl/?p=1337 )

Yes -- they used to have them. They are listed under Audio/Signal Transformers. There is presently no stock, and I doubt they will have any more. And yes, Mike, no one is making analog FM radios any

http://www.mouser.com/ProductDetail/Xicon/42IF123/?qs=%2fha2pyFaduj%252bcqTheNTrF2tyYdsoAzezUfZlxNYiE5w%3d

Mouser have them they are listed under audio transformers, but the data info tells you what they are 10 mins ago they showed over 2000 in stock. Ted ZL1BQA

These FM Radio IF Transformers used to be at Mouser, I bought them. Maybe have 5 or 6 in a plastic box? They dropped them now, called obsolete? So no one must be making FM radios that used these? I

These are 10 MHz IF filters. You should be able to find them somewhere, even in an old FM radio. Sunil will most likely send you the parts if you let him know. The BITX parts are IF transformers made

I ordered a Bix20V3b parts kit from India. Unfortunately, the kit was missing the metal coil inductors L1 through L3 that are used in the bandpass filter section ov the Bix20 Version 3 b/c boards. The