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How about just transmitting a carrier using CW ? ?My BITX40 has a TUNE button wired in parallel to the KEY jack for just this purpose. Michael VE3WMB

Here's another option ( https://play.google.com/store/apps/details?id=com.keuwl.functiongenerator ) ! It has lots of other uses as well. -- John - WA2FZW

Of course, in most cases you can just switch to CW mode for testing. But need a tone to check the mike amp and modulator

From post 22764 of last Feb: I got tired of saying AHHHHHHH after about 30 seconds, so spent the following 30 seconds adding a line to the Arduino sketch (anywhere) in the setup() function: ? ?

Good idea - use a cheap 555 ic to generate nearly any tone. Joe VE1BWV

Instead of whistling into the mic when using an antenna tuner on SSB, we could easily add a tone generator and switch to do that for us. Thoughts?

That is what i tried but i think i blew something :(

I'm a bit confused over operating voltage for BTX40.? Understanding that the PA can be run up to higher voltages, and the main board is spec'd at "12V", is it proper and safe to run the main at

Make sure one or both of those insulators didn't crush on one side and let the screw touch the FET. Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/

Yesterday I installed everything and it worked fine... Today I put everything in the box and decided to use the case as heatsink. I put insulator and thermal silicone. Ok i turned it on and there has

Hey, César, are you using the case as a heat sink for the PA?

Woot!

Looking at the uBitx schematic, it shows the relays in the receive state. On receive, there's a DC path to ground going through K3, K1, L1,2,3,4 and T3 On transmit, with the band select relays as

I incorporated the keyer code from W0EB and W2CTX into my personal software build, but being determined to save the last analog input for S/power metering, kept the single input that detects three

On the power side, I'm thinking about a 19V laptop supply and building a small card with 19, 12, and 5V busses.? ?19V to the PA section, 12 V for the rig in general, and 5 to the SSM2167 card, and

I can follow a trace from P2 to ground through an inductor, so at DC, like your DMM would be using to check that, I'd say yes. And if someone who knows what they're talking about will agree, I'll

Id sure take the schematic!!!! like to know what op amp does that kinda thing thanks! gordon ________________________________________ Sent: Thursday, January 25, 2018 2:51 PM To:

and if the die to heat sink is truly 4 deg C per watt....then the hot point on the heat sink at max dissipation would be at about 110 deg C. ?that's pretty hot!!! Probably you want to keep the

So, some estimations: Junction to case, IRF510 is 3.5 deg C per watt Case to greased surface is 0.5 deg C per watt typical Those heat sinks look similar to WV-T220-101E so roughly 13 deg C per

Hello! Is it normal to have continuity between the two antenna pins? I mean the p2 connector? i have desoldered the coqx just in case. Still continuity...