Now I'm really enlightened. Thanks to you and Dave. ... From: "dayleedwards88" <dayleedwards88@...> To: <regenrx@yahoogroups.com> Sent: Wednesday, May...
The first computer I built was an 8080 processor running at 4 MHZ and each 16K memory board cost $300.00. I was maxed out at 64K of memory. The thought of...
What happened to this subject? It started out as a thread about early radios and morphed into a thread about early computers. To put things back on track,...
Getting back on track, some of the first radios I built seemed to work well because we only had two radio stations in town back then. In later years similar...
Recent posts about Frank C Jones bridge regen brought to mind something I found recently leafing thru' QST for October 1927. "More Selectivity With Three...
You want just less than unity loop gain. THAT is the problem.. Unity, and you oscillate. How you get it is a matter of indifference. Getting close stably is...
... Considering that Armstrong invented the regenerative detector, the superregenerative detector, and the superheterodyne receiver, in that order, it's hard...
I would hazard a guess that ALL radio designs were regenerative back then, wanted or not. It was well nigh impossible to design any RF gain stage that wasnt....
Exactly! Every nuclear power station faces the same problems.... open loop system, running near criticality, controlled positive feedback. Too little, no...
... As a tpnic to that simplistic statement of mine about Armstrong and the superhet, I highly recommend Alan Douglas's "Who Invented the Superheterodyne?" at...
Are you sure it wasn't just a super regen design? where you had a separate quench tube set to operate at maybe 20 KHz? They were common at 20-30 MHz where...
I just posted an update of my Mk.17 PTL regen. It had originally used a 6201 for the detector but I changed it to a 12AU7. An interesting problem arose; I...
GONE! and back on moderation... 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line and TR-4/C Service Supplement CDs <www.k4oah.com>...
I hope to explain why theory goes out the window sometimes. If you read this together with studying my diagram on the regenrx2 site, look under Dayles stuff/...
I pusha da button, it go away! From: regenrx@yahoogroups.com [mailto:regenrx@yahoogroups.com] On Behalf Of Garey Barrell Sent: Saturday, May 26, 2012 10:47 PM ...
This is a systemic problem with Yahoo and has been going on now for some time, I'd say about a month at least. I'm on some 50+ groups and just about every one...
Two more showed up 'from' the same member, but as he is back on moderation they didn't get to the list. As someone else said, it's NOT the 'apparent' sender's...
Dayle, thanks for the explanation. It seems to justify my "cut & try" approach. I tried a couple of 12AU7's with the same results. Putting the 6201 back in...
Just a little thought here, Lenoard. As I remember tube filaments start with a higher current than run current. In this case, it is better to use a resistor in...
Larry, I know what you mean. I most always use a resistor AND an inrush current limiter. Besides limiting the start up current, the limiter also drops the line...
Dayle, in what respects are pentodes poor regeneration valves? I will go so far as to say that most non-toy regen receivers, I mean actually real working world...
Dayle, I haven't really noticed any difference in sensitivity between pentode and triode detectors. Which is quite good (and which is why we have this forum)....
Hello Rob, Yes, pentodes do have that nice ability to vary the screen voltage to reduce the gain, very elegant way to do this. What Im trying to explain is the...
Hue, Hi I didnt mean to ditch pentodes entirely... what I SHOULD have made clear is my experience has been different having become very frustrated with...
 Resistor is for the filaments , ?? abt 10 or so ohms ?? on each valve,,,,, or say just one R for all the filaments ,,? A cl 90 ?? for all the...
In the case of the Mk.17, I used a 20 ohm 5W resistor in the heater string because of the voltage resulting from rectifying the heater supply. I didn't use a...
