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The MAX9814 Chip. As commented the gain should be set between the second and third stage not after to prevent to reduce noise and the chip has a very well filtered BIAS supply for the Electret Mic so

While I acknowledge the discussion is regarding choice of toroids for an AMU project. QRP Labs / Hans, Points out that his LPF design is suitable UP TO 5 watts as supplied in his kits. See bottom

Jack, Don't think they are "detent-less", not stated in the description, but because they are cheap, 10 qty, not afraid to unbend the top shaft retention tangs and remove the detent spring as per

I have and use the qrp-labs LPFs I wouldn't dare go over 10W (and that's pushing it) They are rated for 5w, I don't know where or why anyone would think 100W would be acceptable.

Bill,After Don's comment, I did some googling and came up with the following info. There's so much to learn about this hobby! ?choosing core size | | | choosing core size Choosing core size | | |

Not sure what brought this on but the teaching point of my post for those who would otherwise make current, voltage, saturation calculations for Inductors in RF service and build from them is to

Rick: Please let the group know how these work out, especially if they are truly "detentless". Jack, W8TEE To: [email protected] Sent: Thursday, January 11, 2018 11:10 AM Subject: Re: [BITX20] uBITx:

Looks like the guitar people have all metal knobs for weighty feel? I have not seen one over 3/4".? They come all kinds of finishes, even Chrome. I like about 1 1/8"? Mike, WA6ISP

The MAX9814 could work well But be aware that while the AGC will reduce gain when your audio level gets too high, it will also increase gain when there is nothing but background noise. So during

I had a couple of spare 8 pin connectors from my Bitx40 that I used for the separation then soldered the other end to a male header and my uBitx is happy. Bob N1ETS

Mine's just arrived as well, I did get a bit more from the tracking, Royal Mail showed it arriving in the UK just before 6pm yesterday, so it was quick this end, India Post tracking gives the same

I bought these on eBay? https://www.ebay.com/itm/10-pieces-12-mm-key-switch-rotary-encoder-switch-LW/172336809060?hash=item2820130464:g:rukAAOSwGtRX04ro They have detents, UNLESS they state, I don't

Especially because in?the item description, it says " Shipping to US : USPS with the tracking number (10-15 working days) ".? -- Karl Heinz - K5KHK

Jack, Just ordered the same type part and quantity off of EBAY US https://www.ebay.com/itm/331552547364 Looks like the same part but cheaper in US dollars rather than Pounds. Rick, KN4AIE _____ From:

In fact you could use regular aluminum foil for this. ?? A few weeks ago I watched a documentary on the Voyager Space probes and they interviewed the JPL scientists that worked on developing them.

Why is the US blacklisted from buying these? Jack, W8TEE To: [email protected] Sent: Thursday, January 11, 2018 10:56 AM Subject: Re: [BITX20] uBITx: Encoder without detents Hi Neil

Hi Neil

I used the MAX 9814, follow the datasheet suggestions. Set the final output with a pot. Shown is the PCB and Mic. 73's Mike, WA6ISP

Dave, Can you point me towards which chip/board you're going to try out?

Thanks Mike.? I see that now.?? Searching further has produced more results without threads.? I think I'll leave it alone for now. --Neil, W2NDG