...for gummint work. A piece of #30 wire as long as my desk is wide. Ninety-six times threading the needle on a T37-43 toroid core and I have a 2.9mH choke....
You will need to be careful with the signal levels as the signals can change the capacitance leading to effects most people are not familiar with. Look up...
... What would be interesting -- and the softrock folks would love it -- would be to diode-switch fixed caps to achieve throttle effect. Then you could use an...
... Indeed, I've thought about doing exactly this... either through a fixed bank of caps as you say, or with computer-controlled voltage driving a varactor. ...
FWIIW, my doctoral thesis was on traveling wave parameteric amplifiers. With 6 varactors, serving as the capacitors in a low pass filter (inductors were wound...
... For a vacuum-tube-based detector, detecting the presence of a certain dc level of grid current would probably serve. For use across almost any detector...
... Just thinking out loud here... would the dc level exhibited just at the onset of oscillation - taken either from the grid current or the RF peak detector -...
Hmm... an array of diode-switched caps, eh? With 8-bit logic (and values) you could step from 0.5pF to 127.5pF in 0.5pF steps. Lemme see now... with standard...
My 80mtr regen is partially built. A J310 Armstrong circuit is now gracing the end plate of my L(ucky)M(e) tuning capacitor. Laid out like this I will not need...
Hi Jim, Microprocessor controls in radios have proven troublesome in my shack. I have some. I am not interested in buying or building any more of them. <tongue...
... Yes, there will be variation with frequency/band in whatever value(s) you decided to monitor and control. So remember the saying "The perfect is the enemy...
... This is the gist. In effect, a stage or stages between the antenna and AF power amplifier is/are serving to (a) envelope detect incoming signals despite...
Hi everyone, I do not know if any one is intrestred or not. I have my brother passed a way a few uears ago and He was a Alfred Morgan Fan. He had all is books....
Would like to see pics, Keith http://sites.google.com/site/kf4tapenterprises/ ________________________________ From: Mistress <rhiannonnalisnick@...> To:...
The Lucky Me regen is coming along quite nicely. Last night I built the J310 grounded gate rf amp and the 78L08 regulator on a piece of copper clad mounted to...
Keep it up ,Bear ! When you are happy , publish it ! Jerry ... From: qrpbear <qrpbear@...> To: regenrx <regenrx@yahoogroups.com> Sent: Wed, Apr 6, 2011...
There is a person on ebay selling regens with varactor tuning. 230457772478 here is the auction #. Keith http://sites.google.com/site/kf4tapenterprises/ ...
I have my little 6J5 regen wired up, I think, except for the 1/4 phone plug. I know I have a couple of dozen here and can't find them at the moment. But I did...
The audio amp is finished. A single 2N3904 driving an LM386 proved to be adequate. At present the 386 is configured for gain=200 but I may reduce that a bit....
well, I found the phone jacks, wired it in, applied power and nothing, nada, zip. Time to start over. Brian. http://sites.google.com/site/kf4tapenterprises/...
I don't have a set of 2000 ohm or higher phones, And I don't have an audio transformer at my finger tips, Can I use a filament transformer? If I did would...
Dear amigo Brian: You can use a 5 volts or 6.3 volts secondary of a filament transformer as an šaudioš transformer !!! The secondary goes to your low...
Most definitely need a set, It was planned to get a set this month, But I blew the radio budget buying a Hakko de-soldering station, So just trying to find a...
De-soldering station is almost a must, has most of my parts are salvaged. Nearly all my projects are SS, But I feel I need to scratch build a working tube...
