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Though there is no problem using any Arduino board as a programmer (with proper external wiring), I highly recommend using one of the cheap USB-ISP with the 6-pin connectors (see photo below). [image:

The cap you fitted is acting as a top cut tone control so you will loose some top end clarity.you could try different values as there will be a trade off between feedback from transmission being

HI, Here is a picture of my Nano a Nano ISP programming setup. I used the ISP headers with the pins connected one to one, except for the orange wire connected to pin 10 on the Nano programmed as an

I wasn't having that problem until I installed the AGC board.? Then, when it happened, I soldered a 10nF ceramic capacitor across the audio pot from high side to ground.? The feedback went away, but

Glad you're back Gordon. Bet of luck with your recovery. 73 Dennis W7DRW

"brown lead to the center"

Benjamin, The wall warts are not all well filtered, so that probably accounts for the hum.? It seems like you audio may not be the problem, because the receiver is naturally quiet if the grounding is

Check the potentiometer wiring, there is some mistake on first wiring (inverting high and middle) 73 - remi f1mqj —- vérifier le c?blage du Potentiomètre, un schéma de c?blage inversait le

I ve at least 3 Chinese nano boards from various sellers, working fine with arduino ide and windows 8.1 (the only problem I have : it need to be run as administrator -giving strange messages when

I have come out of surgery now, and I think I’ll be home tonight and may be able to construct voltage divider on my Heathkit Cantenna to get a attenuated signal that I can further attenuate on

As a linux user the whole problem of drivers is actually transparent for me. For Win10 it was a major pain and I went with a (real not clone) FSTV232-3v3 cable to sidestep the whole thing.? It

There is a design out there to use any Arduino as ICSP ( I have one I made up) and that can be used to load a boot loader or entire program as desired. Also I have a commercial in circuit programmer

Giles Okay. I have one other volunteer for moderator. I will let you both know when I get the group up and functioning. Probably only a couple of days until that happens. Arv _._ wrote:

arrl dot net

Alan, You hit the high and low points well.? The biggest thing is we have a known fail. We believe its due to layout. Its not easily fixed for most. ? Your not the only one that wrote that as well

ws4jm@...,?for some reason did not post

Warren, The -30dbc for IMD of third order is good.? Whats no so good is only 2W. It was actually hard to find that data for a lot of the QRP/low power radios. For many it doesn't exist.?? I never

I have one I built and was thinking of giving it a go.? Glad to see others feel the same way.?? Perfect for the band and power range. 73, KM4OLT Michael

I am unable to achieve IMD products at -30 dBc or better at any power level above 2 watts. I have searched this board and do not find IMD measurements. What Is the consensus on acceptable IMD levels

I can help moderate the new forums(s). I'm an electrical engineer and Extra class ham. Jim