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Sam I would evaluate your uBITX to see if you need either feature.? See if you have any BCI interference, and if you did experience some I would be so tempted to check performance connected to

This exact filter is available from www.danssmallpartsandkits.net for $10 + postage. The PCB is 1x1.5 inches and the kit has all parts and extra parts to change the center frequency, if so desired.

Also Have not had time to put in recieve path only yet and its survived many 5w transmits Its on my list when i rebuild with the qrp kits amp

Hi Sam i followed the in out on it but it works either way

@Laurence... I picked up a filter to try. Is it really directional?

Hi everyone, I just go my case from Sunil and I'm mapping things out in my melon. Question... I would like to run a bci filter and an rf gain (5k pot) control. Both will be on the rx line. Should I

Thanks Mar. I'm not entirely sure what kind I have. But I guess experimentation is the best approach. I agree about having a separate switch. That might be something I implement. 73, Doug -- KJ0F --

Hi Doug, The one that comes with the board is a standard mechanical quadrature encoder with a mometary NO switch.? You can replace it with another quadrature encoder either mechanical or

Jim, do a web search for USB powered microscopes. Some are < $50 and amazingly useful. I have one that connects to PC has built in LED lighting, allows you to snap pics, etc. Some also have numerous

If you are into DYI here are a couple of

Paul, I too remember? the good old days, but it's been about 40 years since I built anything... Heathkits were my rigs of choice Dx60B & HR10B & the HG10 vfo. Until I received my kenwood TS520. Now I

Thanks, Carl. I actually had no idea what Philip was talking about and the "AGC kit" was just a guess. Vagueness seems to be a necessary qualification for posting here. HI 73, ... Martin

Sounds like you are having rf on your ptt wires. And elsewhere. Choke that puppy.

This is a little off-thread -- With the advent of SMDs everywhere -- does anybody know of a CHEAP thermal / IR camera for PCB inspection? I know that you can get a thermal /IR videocam for several

Joe, Which version is this ? In my V4 boards even the 3904 run hot. Raj

Gordon, I too built a triple 811 linear amplifier (when I was about 15 yrs old). It was grounded grid and the bifilar coil for the filaments was a tricky part - no toroids in those days. It had a

Regarding the micro USB connectors, there are 2 different kinds. The one looks to be the most common type as used on my android and rechargeable flashlight. The other, as is found on the Raduino I

Martin,? Phillip is talking about the volume pot on the ubitx case made by Amateurradiokits.in Carl M0CLS.

Here's an archived "scan" of the 2005-ish kit instx I followed. It so happens that I found the circuit board and plans but not the parts in the Great Abyss, so I ordered the few parts not also found

dont know, just reverse the wires. As it’s wrong