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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...

I got them on Ebay, for about 25 bucks a pop I am happy to share my design and gerbers if you want them The design uses a driver op amp so I can drive a 50ohm cable from the oscillator. I have it as

Did some testing today. Running the booster at 14v input and setting the output to 23v I could detect no discernible noise change either on a dummy load or on an antenna. Transmit audio was recorded

BITX QSO Afternoon/Evening, Sunday, January 28, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere. While not the greatest band conditions, the afternoon session last week was better

The JLPCB boards arrived today. Five boards, exactly as I ordered, and an unusual cardboard based ink pen of some sort. The boards look wonderful, and basically identical to the ones from pcbway

Many thanks all for the helpful comments and ideas. Yes, I think the 2 pole rotary switch and A2 is the way to go. Now then, where's my Arduino instruction book..? 73 Steve MW0KST.

All: I got many good responses to my request for help, as is normally the case here. To all...thank you! Jack, W8TEE

Wish I had seen these before! Thanks! Jack, W8TEE To: [email protected] Sent: Thursday, January 25, 2018 1:59 AM Subject: Re: [BITX20] SMD Group Build IIRC this is the place where I bought

that looks really nice! where did you get that ovenoscillator? ________________________________________ Sent: Thursday, January 25, 2018 1:26 PM To: [email protected] Subject: Re: [BITX20] Creating

I used a separate power switch, that way I can use a normal volume pot with 1/4 inch shaft if I wish. Also means that if pot gets noisy, I only have to replace with another audio pot. AL VE3RRD