[600MRG] Regen Rx? I'm Missing Something?

[Alan Cooper]

On Sat, 24 Feb 2018 21:59:21 -0500
"D.J.J. Ring, Jr." <n1ea at arrl.net> wrote:

 For those of us who don't know our foresting operations, this link
 might be interesting:  http://www.vannattabros.com/cable2.html
 
 Fascinating!
 
 73
 
 DR
 
 On Feb 24, 2018 15:32, "Alan Cooper" <w7aln at netzero.com> wrote:
 
 > Old designs are not necessarily bad designs... The RAL7/RAK JAN
 > receiver designs of the forties are still hard to beat in
 > performance even today in some applications
 > (such as noise reduction at 630Meters and lower in frequencies).
 > Recently in
 > Radio Controlled Choker (used in logging ops in the woods products
 > industry)
 > designs they went back to the use of the Regen design for better
 > reliability
 > and toughness in
 > Highlead rigging Logging operations (using bipolar transistors of
 > course). It helped but even a Horn can be broken off of a Large
 > Black smiths anvil. I
 > watched a logger do it once. High "G" forces from swinging choker
 > leads slamming together tend to break things, which is why they
 > call them choker bells because they ring like a bell when they hit.
 > Incidentally those receivers are used at 72mhz.
 >
 > Alan
 > W7ALN
 >
 > -----Original Message-----
 > From: 600MRG [mailto:600mrg-bounces at w7ekb.com] On Behalf Of
 > k0htf at netins.net
 > Sent: Saturday, February 24, 2018 10:12 AM
 > To: Marshall Cross
 > Cc: 600 / 630 Meter Group
 > Subject: Re: [600MRG] Regen Rx? I'm Missing Something?
 >
 > Hi all from Iowa.
 >
 > As Frank, K3DZ, said "As a nostalgic topic, great!" Sometimes the
 > really olde designs and stuff are surprising in what they can do.
 > (That does not necessarily apple to me. I am 81 and have been a ham
 > for a bit over 60 years....)
 >
 > If someone mentioned the autodyne receiver it slipped past me. An
 > interesting item is at:  Hi all from Iowa.
 >
 > If anyone mentioned the autodyne circuit I missed it. A good
 > description is at:
 > http://www.rfcafe.com/references/qst/rationalizing-
 > autodyne-january-1933-qst
 > .htm
 >
 >
 > Shades of a Hartley oscillator.
 >
 > I have several olde radio books that say something about
 > regenerative receivers. One big concern was their strong radiation.
 > I have talked with several radio men from the WW-II era that
 > confirmed that. So, the addition of an RF stage served the two
 > purposes of isolation and added sensitivity.
 >
 > De K0HTF.
 >
 > On 2018-02-24 08:41, Marshall Cross wrote:
 >
 > > Low power consumption while in sleep mode.
 > >
 > > Sent from my iPhone
 > >
 > >> On Feb 23, 2018, at 4:52 PM, Frank Lotito <k3dz at live.com> wrote:
 > >>
 > >> For the last few days there have been postings regarding
 > >> "regenerative receiver" design, etc.  I'm missing something -
 > >> Answers to my  question might help me appreciate the reason for
 > >> the recent interest in regen receivers -
 > >>
 > >> ..
 > >>
 > >> In this day and age, what does the analog regenerative receiver
 > >> bring to
 > the table that a recent design SDR receiver, or for that matter,
 > highly semi-digital / semi analog receiver does not offer?  As a
 > nostalgic topic, great! I have no problem with that pursuit.  The
 > antique "aficionado" can roll his own using traditional
 > hollow-state technology, restore to some extent a classic regen, or
 > construct an all solid state regen receiver employing the epitome
 > of analog circuit design techniques.
 > >>
 > >> ..
 > >>
 > >> 73 Frank Lotito K3DZ / WH2XHA
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