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Thanks' Have you a link to the thread? I'm one of the ones building a PA based on the work of WA2EBY.) Alan

Great documentary. See Netflix. James

Ok, great. Next, you might check the polarity on that electret microphone. If you didn't build it yourself from the supplied parts check it anyway. Make sure the + terminal of the mic goes to the mic

No It looks like i need to refrain from posting and just direct you-all to my website now when the kit is complete. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner -

My comment is in regards to discussion in his group. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner –

This SWR birdge: ? ?http://www.kitsandparts.com/bridge1.4.php

Perhaps you are thinking of this SWR Bridge? It is apparently good for up to 100W, intermittent use.

Jim - thank you - I validated the antenna wiring and it appears good.? I'm also seeing good output on CW (as opposed to SSB voice), so I think that proves out the antenna connection.

Further update...I dont have a telegraph key, but I used a jumper to (momentarily) ground the cw key connector.? I got cw tone in the speaker AND over 5 watts output indicated on the MFJ meter.??

Perhaps , difficult to know whether relays are working . Can we have a small led on the relay drive circuit to indicate atleast drive status of the relay. Whether it is operating or not has to be seen

Yes, that is the application note on the Max part.? That is what they designed the part for. I followed its suggestions for settings.? There are several capacitors to pick.? The main thing is to

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