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Hi Sarma, Yes the contact wetting may indeed help the uV signals in RX mode to pass through the contacts. Adding just 2 resistors as you suggested could improve reliability. But I also suspect that

Yes allard. ?here is the small suggestion. ?the png file has? encircled areas marking the mod. ?As the resistors used are 4K7 each , they won't effect the workg of the rig at 50 ohms impedance, At

Yeah I've had the same issue too some time ago. When I tapped (or pressed) the relay it sometimes came back to life. I just replaced the relay and never had this issue again. 73 Allard PE1NWL

Hi, ? My BITX40 arrived in good shape, no damage from DHL apparently, and I am preparing to wire it up. However doing an eye inspection of the main board I found that the wire in the final RF stage

in telecom while using relay contacts for low level of voice signals, they use a methpood called *Contact wetting *. they manage 1mA current passing thro the contact while actual signals are taken

Sarma, I have been asked a lot about the noise issue from laptop power supplies and the BitX40. I cannot tell any difference between using the laptop power supply and a 14v battery. Yes I live in

1 more possibility is the tx rx relays. Some people have reported relay failure. This may explain why it worked for a while then went deaf again. On RX you should be able to bypass the relay and if

Here's one on banggood, the manual for it is at the bottom of the webpage: ? ??https://www.banggood.com/60mm-100PPR-6-Terminal-Eletronic-CNC-Hand-Wheel-Manual-Pulse-Encoder-Generator-p-1130887.html

My 5 watts worked KC9WPH, VE3RRD, KG0BK, I came back later and the band closed up on me. Ed W0OIC

That’s a serious Steam Punk device!

Hi Justin, I had the same problem. The software wouldn't read the Nano board and said not responding. So I went ahead and bought a new Arduino Nano board. Then I downloaded the software for the 1.21

I started out on my "big rig" but had a good signal from Robert VE4RBH in Winnipeg. I started out running 5W, but did turn it up to 100W at the end. Then I changed over to the BITX and had my 4th

It's regarding your AA article. I'll get you through QRZ. 73 Ken jjpurdum@...> wrote:

I should be okay in QRZ.com. Jack, W8TEE To: [email protected] Sent: Sunday, October 15, 2017 8:51 PM Subject: [BITX20] Attention Jack Hi Jack I am trying to send you an email off list, but it

For the BitX, if you’re just connecting a paddle, I wouldn’t bother. You’re just shorting a high impedance GPIO pin to ground, very safe to do. If you’re connecting it to any other device

A cap on a GPIO pin will cause a rising/falling edge curve instead of a sharp change. It just means it’ll register the button press, or encoder wheel rotation, 2PiRC seconds later. 2Pi * 20k *

Who are you talking to over there? You need to talk to the guy that drives the van around. Years ago it was Dee, but I'm sure he's retired by now. Vince. -- Michigan VHF Corp.

Worked W0OIC Ed in IA, WI1B Ken in MA, W0PWE Jerry in IA and WA9DOH Larry in IL. Heard a couple more that I couldn't quite copy. Sounded like a OHR (over the horizon radar) kept popping up on 7277,

Hi Jack I am trying to send you an email off list, but it is bouncing back. Ken VA3ABN

BITX night. Qso with VE3RRD AL..5x5 at times ridding the QSB roller coaster. 19:15 CST 7.277 Just heard W0PWE way down 4x4 in the noise of our all band plasma TV Hi. 7.277 Heard K1KJW several times