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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'

I haven't gotten around to it but I was thinking of changing the hang time by adjusting the 100k and 47uf cap on the 2n7000 gate. The hang is about right with a 100mf instead of 47mf but that is just

For anyone using this scheme: I recall someone encountering distortion due to something in the Rx before this point. I had the thought (that still remains): why not 'feed-forward' like AM AGC? My

Ok, so it also has a resistor and a couple of caps. Anyway, here it is: http://www.w1hkj.com/FldigiHelp-3.21/html/w5zit_rt_channel_page.html While wsjtx doesn't put a steady tone on the opposite

I have an old Telex ProCom I amplified microphone that has never been used and I was thinking that it might be a good match for my BITX40.? It uses an Electret element and has a fixed level output

Brent, I am using that circuit and it works pretty well. See my posting #32796. I changed a couple of caps and tapped it at the diode and fed that to an s-meter (or vu meter) circuit which displays on

Hello I'm thinking of trying to build an age circuit. I have ample room on the board I used to build the anti thump circuit. Does anyone have an opinion as to what is the best circuit to use? I was

Hello All, Let me introduce me a little. (sorry if I'm writing faults in English, no so easy using a French corrector !) I'm 49 years old . Electronic engineer in radiocommunication and power

Is it still possible to purchase the TFT/VFO boards for this project?? 73, -Rob N4MN

Randell, Running up on the increased inverse complexity of convenience, time to start monitoring power rails? Not being off the shelf plug ins, can’t just add up published specs. You are having way

Searching for the word "error" in your listing shows that it's having trouble with the si570 library. Could be a difference between Farhan's version of the library (he coded that several years ago)

afterall it is easy to compute the inductance of coil with 39pF cap in parallel to give a centre frequency of 14.1 (for 20m band range assuming 40 to 14.2. I use * mini ring core calculator where in

Rather than the duinovox I found a simpler circuit for interfacing data. It consists of 3 small audio transformers (got 10 for a little over $1, a couple of 1N4148 diodes and a 2n7000. I won a cheap