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What we really need is an antennas group. Oh, wait... Vince.

Thanks a lot Warren, This sums it all. A EFHW antenna with 49:1 transformer, without radials with a tuner is a simple solution which seems to be workable solution. Encouraged with this enlightenment

Hi All, What is the consensus for a SMT replacement for the 2n3904? I note the MMBT10 only has Vceo of 25 vs 40 for the 2n3n04. I really do not want to tack leaded parts onto the board. My latest

ps ofcom reduces qrm by limiting power to 400 watts for a full licence. intermediate are limited to 50 watts and foundation to 10 watts.. i thinkt that is the big linear amps which cause qrm terry

i agree that this approach is not ideal but without lab test equipment it is the best available and is within the requirements of the uk ofcom. 73 de terry gm4dso

I made the attached files for my own reference during work on my uBitx which I have now suspended. But I thought they might be helpful for those still engaged in trying to filter the radio with

Dear John I have already done a image conversionfor for the 3.5" Nextion with *Microsoft Paint* but I do not know how to change the x,y,h,w . If you have the same LCD I can send you the files. Nikos

Yeah, 40 meters not so great for sure with qrp. I have worked dx on 40 with 100w. 20, 17, 15...gets progressively better. Agreed a proper size antenna is the way to go if possible

Warren, Guess I now agree that it’s audio distortion creeping in somewhere. I’ll have to try tracing it down. Mike K5ESS Sent: Tuesday, August 28, 2018 5:01 AM To: [email protected] Subject: Re:

Ajay, This was addressed in this thread but I probably don't blame you if you don't want to read through several hundred posts and comments to find it. The EFHW antenna with the 49:1 transformer works

It seems like an awful lot of added effort and complexity with little gain to me.

How about it? ? It is getting very hard to search and find posts just for the radio I have.

I was using the 80-10M version of the antenna until a storm two weeks ago blew it into the next state. (My fault, not the antenna's.) I have worked the world on 40M CW and SSB with both 100W and QRP.

Yeah, a mag loop will do a great job of attenuating not only the spurs or harmonics into oblivion----and almost that destination for your desired signal as well!! I've seen efficiency figures of -10

Myantenna is selling a similar product. EFHW 49:1 does not require radials which makes it very attractive. Can some one (who has used Myantenna or 49:1 home brewed EFHW antenna) share the experience

Hi Bo With my experience using mag loops, I would expect that the narrow tuning of the beast might effectively take care of any spurs or harmonics. I have one that tunes 40- 15, and unless the tuning

Good job W4OP!

Yes, good data makes all the difference, and I really appreciate all the excellent info presented here. I remember seeing an ad for an antenna which recommended a long feed line to keep the swr down.

Indeed I think the threads here have been much more informative than the Facebook group and those magic videos. simply wrong. The gimmicky transformer that is advocated works well only with truly

Mike I don't think this is IMD per se. It looks to me like harmonics of the modulating tone. Those harmonics could be present in the tone itself or they could be generated by non-linearities in the