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I conducted some experiments with using a lowpass filter between the BS170 and the bridge circuit.??? I had been using a jumper wire in place of a lowpass filter up until now.? When testing with a

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Well, I've just rewound the trifilar toroid for one of my QRPLabs receivers and I don't see any difference in RX performance between the wire supplied in the kit and the multi coloured trifilar wind

The Boonton 91H has the lowest scale of .001 volts (1 millivolt) full scale. You can probably see about a 20-30uV signal with it on the lowest range. August KG7BZ

The Boonton 91H is a lab grade RF volt meter. The lowest range is .001V / -70db or about 0.1?V (1/10 of a microvolt). -- 73 NE5U Mike

Hi Bob. Do you have a receive setup for WSPR? If so, see if you can decode your own signal. You will need to use a dummy load on your receiver antenna, and perhaps turn on any RF attenuators that your

My #308(no software upgrade)on 20 is operating well with several contacts, including 5 SOTA.? However I have failed on WSPR. Same antenna and varied times so propagation should not be the culprit.?

I've used different colours of craft wire from Hobbycraft and The Range in the UK. Not such a big range of colours and only two diameters, but it's soft copper and the enamel appears to be

Hello Paul / Alan / Mike, Well I bought some earlier, was concerned it was just a coloured coating but looking at it in quantity it says enamelled, and soft, so here's hoping... ! Will report back

Alan, I hadn't even thought about those things! I was wondering about thickness and durability of enamel. 'Enamel' is a rather generic term with regard to coatings on wires, and as we know not all are

Thank you Hans! That is what I thought, just wanted to confirm that it was probably static and not mis-configuration... Oh well... I guess I zapped it... will have to order a new one since all my

Hi, I observe the similar issue from time to time (when using external cw paddle). Cheers, Victor

Mike, I do not know it but it is probably not sensitive enough. An alternative could be a normal RX, maybe with attenuator. 73 Alan G4ZFQ

Paul, I was going to ask, seen it before on Ebay etc. Is it soft copper, not hardened and springy? I assume any impurities will make no difference to conductivity and soldering. I also assume the

Good question Paul. My assumption is that a 28awg copper wire is a 28awg copper wire. Were it anything else I would expect it to be described as a 28awg copper alloy wire. Easiest thing is to ask

What is the difference between enameled wire sold as magnet wire and enameled wire sold as craft wire? I've always avoided buying the latter, wondering if it is suitable for our purposes. 73, Paul

Alan, I wondered about that. I keep letting the unfamiliar circuitry, ?P, Tayloe detector, etc skew my thinking... I need to get a handle on that. In the end... this is still an RF receiver and RF

Is that heat strippable wire or does it need to be scraped?

(1) Your post was about about how interesting / useful the FSQ mode is. I agree, nothing wrong that, but you're post was not a request for consideration. It was a post about how interesting / useful

Hi Al, I have finally come to the point in life where nothing is obvious :)? I pulled the resistor and it was dead on 120kΩ. I see the square wave at the resistor lead come from pin 8. It's not