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do you need more then about 20Watt ?? because that is what a single IRF510 can deliver with a 24Volt PSU, and of course only 12 Volt for the rest of your Bitx40

LOL I actually use a computer heatsink from a CPU it's like 3x2 and has 20 or so fins and I have a cpu fan attached to it's back. I have push this thing to the max and the hottest I have had it on

So as I investigate this some more it appears this may be easier than I had thought. But I really don't know, I'm just a new Ham and trying to apply some logic and I have no real electronics

What type of heat sink are you using?

More power??? ?I was looking at the schematic at the PA circuit and it appears that it was wired with a thought of dual IRF's in the future. ?What got me thinking was looking at the ubitx that has

I use 3 PSU total I use a WII power supply to power the radio itself and I use 2 xbox 360 power bricks in series for 24 Volts to the PA. The WII PSU is 10 amps rated and the xbox supplies are 16 amps

I am wondering what others are using for power supplies. I have received signal reports of weak signal, and there was a comment that it might be a lack of power during transmission. I am using a

Tried this tonight and it works! Only small issue is that when the volume is on full there is an audio oscillation. Its right at the end of the pot though so not a problem because i never turn it up

BITX QSO Night, Sunday, May 7, 9pm Local Time, 7.179 MHz Join us as we make contacts from BITX40 to BITX40 on 7.179 MHz in 40 meters! To participate, call CQ BITX at 9pm sharp, your local time, on

Dear OM, My Bitx 40, Digital VFO connected today, but RUNS VERY FAST after a particular frequency......? How can control smoothly? 73ees VU2JON *JOHN T.P.* Tharayil House Sree Ayyappa

Same here, I will try to be there 73 ON2AAV Luke

Nice going Craig. I had no success last night and heard an annoying strange signal just below us. It was also on web sdr, which I frequently use to hear band conditions and to try and hear my signal.

Gian I had uploaded the ADE-1 based schematic. you can see from my post. all the best sarma vu3zmv i7swx@...> wrote: -- Regards Sarma

I'll try. 73 de Armin, DJ2AG

Yes I have used batteries to power it. 4 18650's 4.1v li-ion batteries. Then a nice 7812 regulator. Tried that 3 weeks ago.? I didn't build an attenuator so I didn't force feed it a signal like I

Nice write up Paul. I am very happy with the VK3YE AGC. It provides just the right amount of AGC action for my tastes and after many hours of operating with it in all kinds of band conditions I have

NM I just read it a 3rd time you said the coil not the tx/rx switching. So just between the coil power cathode to +

Are you referring to the 2 diodes for strong signal rejection? So you added to same pins as K2?

Hi Mike, also for me was not posible to find the schematic using ADE-1. I got the one with SBL-1 and redrawn the mixer part with the ADE-1 as positione on back of pcb. Herewith is the

Allard, Just wish to add my thanks for the great job you have done with the sketch. Compiles, uploads and works a treat. 73 Howard, VK4BS