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Don't know about using caps instead of the transformers. You'll notice that the center taps are used making them step ups and step downs. The ones I got didn't have center taps and the levels were/are

I'm impressed . Will wait for Your next publications . 73! Sent from Yahoo Mail on Android On Thu, Oct 5, 2017 at 23:31, Jean-Matthieu F5RCT via Groups.Io<f5rct.jm@...> wrote:

Comparatively, the 7805 is like a dropping resistor. You're taking 12 -14 volts and regulating it to 5 volts. That's a 7 volt drop, which at 1 amp would be: (InputVoltage - OutputVoltage)* Current

In the pjhotoabove , i suggest the regulator be mounted physically on the marked location in the attachment, and wires extended to the PCB. It helps. regards Sarma

As I recall, I removed mine, turned it around, then laid it down flat. Here's a picture: ? -- John - WA2FZW

Why not add a heat sink if not already done? Secondly you mught fix the regulator on the metal enclosure body, if you used one.and extend wires to the raduino pcb. I dont recollect whetyher the

The STM voltage regulator on the Raduino board gets really hot. Is that normal? also, it sticks out and i’d Like to bend it back so my display panel fits in my box. No issue bending it (carefully),

Again sorry, but Link please? We don't all have a n archive? that comprehensive, and Group's search is pants. 73, Dex

Join us as we make contacts from BITX40 to BITX40 on 7.277 MHz in 40 meters! This is a worldwide event for BITX40 stations starting at 7pm in each time zone. To participate, call CQ BITX on Sunday,

Could Sunil's agc be used? I think it is inserted somewhere in the IF??? I've downloaded the docs on it, but I'm not smart enough to understand all I see. I have the VU2ESE AGC, and I can't tell a big

That is nice, and so simple, I think I could do that one too, Vince. I'm wondering if a person could change the transformers to 10uf caps like the duinovox has. I may need to try it just for fun. The

Well, I just got my Bitx40 Raduino....Let me build and test that out and I'll get to the uBitx. I want to mate them with a 25W PA I plan to design. Why? Because I want to try to make a broadband PA

Yep. The cost is $8, domestic shipping is included. Use PayPal to econjack@.... Be sure to add your shipping address. Jack, W8TEE To: [email protected] Sent: Thursday, October 5, 2017 1:14 PM

No, Pat. RC is still at FET gate, just FET drain via C to Q1 base. Value of C could alter the severity of the FET's effect, but would still not have much effect on overall action. If connecting C to

Jerry et al: Q1 should be fine, to 'normalise' the chain. 'messing up impedances' will only occur once the FET becomes resistive, i'e. Vg > (turn-on threshold), at which point all that happens is

Here's the thread on distortion: ??/g/BITX20/message/32043 ( /g/BITX20/message/32043 ) You need to detect the signal level somewhere after the crystal filter,?

I have it apart now working on a new case so I can't verify it. It's not 5 secs though. It's more like 1.5-2 secs and I guess that is due to the interaction of the threshold, % of charge, and RC. It

Further thought, Pat: FET might not turn on till about .5(Vpeak) ... threshold :) ? 73, Dex

BTW, Pat - 100uF, 47k? T=CR - mics x megs = seconds, 100 * .047 = 4.7s. Is there a threshold? or do you have around 5 seconds of gradually-increasing signal? 73, Dex

Pat, it's all said - think about it. 'Normalises' signals through the whole Rx chain once respectable level achieved, leaving it running at full gain until then. Transients knock it back till 'hang'