Subject: glowbugs V1 #152
glowbugs Saturday, November 8 1997 Volume 01 : Number 152
Date: Fri, 7 Nov 1997 13:51:23 -0500 (EST)
From: "User Rdkeys Robert D. Keys" <rdkeys@seedlab1.cropsci.ncsu.edu>
Subject: Re: Bruce Kelley, W2ICE Silent Key
In article <19971107130301.IAA07563@ladder02.news.aol.com> you wrote:
> I have just learned that Bruce Kelley former curator of the AWA museum has
> passed away on Nov.6
> W2PM - Life Member ARRL Since 1976 - Member AWA
> Top Dollar for Fine Telegraph and WIreless Apparatus
>
> VISIT MY WEB PAGE: http://members.aol.com/pmalvasi/keypix/pete.html
This is a sad one indeed. If you have never worked Bruce running his primary
keyed rigs with their fine bell-tone ringing timbre, you have missed out on
some of OT amateur radio's finest sounding sets. Bruce was a master of the
primary keying methods. His armchair copy fist, and the tours of the AWA
museum under his guidance, especially around that KW rotary gap set, will
be missed by all.
RIP OM
ZUT
VA
DE NA4G/Bob UP
Date: Fri, 7 Nov 1997 13:51:23 -0500 (EST)
From: "User Rdkeys Robert D. Keys" <rdkeys@seedlab1.cropsci.ncsu.edu>
Subject: Re: Bruce Kelley, W2ICE Silent Key
In article <19971107130301.IAA07563@ladder02.news.aol.com> you wrote:
> I have just learned that Bruce Kelley former curator of the AWA museum has
> passed away on Nov.6
> W2PM - Life Member ARRL Since 1976 - Member AWA
> Top Dollar for Fine Telegraph and WIreless Apparatus
>
> VISIT MY WEB PAGE: http://members.aol.com/pmalvasi/keypix/pete.html
This is a sad one indeed. If you have never worked Bruce running his primary
keyed rigs with their fine bell-tone ringing timbre, you have missed out on
some of OT amateur radio's finest sounding sets. Bruce was a master of the
primary keying methods. His armchair copy fist, and the tours of the AWA
museum under his guidance, especially around that KW rotary gap set, will
be missed by all.
RIP OM
ZUT
VA
DE NA4G/Bob UP
Date: Fri, 7 Nov 1997 15:10:41 -0500 (EST)
From: rdkeys@csemail.cropsci.ncsu.edu
Subject: Re: Regen Receiver in November? SURE
>
> This message is in MIME format. Since your mail reader does not understand
> this format, some or all of this message may not be legible.
Whatsay folks turn off their metamail extensions so that email is properly
7 bit ascii.....(:+}}..... I am an OT unix fan with lowendian systems.
Think 7 bit and enjoy life a little longer.....(:+}}.....
> if October was Regen Month, what happens if I want to build a regen in
> November.....
Well, you get extra credit for hanging in there!
There is no set time limit. The point was to get folks building so
they would have something up for the season, which is HERE/NOW.
Ideally a month to put together the receiver and a month for the transmitter
should not strain anyone, AND it would be ready for a December OT Fracas!
> I had a nice BA QSO with Art WA5OES on 3.579 the other week. Art got to
> telling me about his regen receiver. By the time Art finished
> describing the receiver, I coundn't wait to build one. I dug out my
> C.F. Rocky Regen book and started reading it. I had only glanced
> through it before. Read it this time. Hmm, so thats what a "throttle
> capacitor" is.
Yup.... throttles are like hidden wisdom wats makes regenerators play better.
Art and others have done well with their building projects, and that is GREAT!
I am glad you got motivated to put one together. They are actually QUITE GOOD
on the 200 meters and down territory (160/80M), and compare favorably to any
modern receiver, within the capabilities of regens, when built well.
> Art then mailed me the design information on his receiver. Thanks Art!
> Its a 1934 Globe Trotter from an article by Dave Ingram Feb 1990 CQ. It
> uses two '30 tubes with a capacitor throttle, 45 volts dc.
Sounds like a sure winner, to me.
> Art mentioned that there was a few problems with the original article
> and some of the fellows on the list recommended some changes.
>
> Why is the antenna trimmer variable capacitor value recommended to
> change from 100 pf to 3 pf? Does is 3 pf really enough to tune the
> antenna. Maybe it was changed to reflect different number of turns on
> the grid coil. Three pf seems close to zero pf.
Close to zero pf on the input coupling isolates the regen detector from
the antenna farm, birdies, big neighbor kw's, and that sort of thing.
The capacitor is not really a tuning capacitor, but IS a coupling capacitor.
For tuning, build a proper antenna tuner front end if you want. That works
very well, too. The point is to UNCOUPLE the regenerative detector as much
as possible, and let the audio system provide the additional gain by running
wide open. One audio stage is usually sufficient, and two will blow yer
tin cans off yer noggin.
A regen detector is very sensitive, so you really don't know the difference,
and the stability and selectivity go up as you decrease the loading on the
primary/secondary coil systems. I use a pair of aluminum plates about
1/2 inch square or thereabouts, and that is P L E N T Y of input coupling
to the high side of the secondary tank. Also, the grid coupling cap can
be reduced to a little as 10pf or so and the grid leak increased to the
terraohm range (stray leakage) and the effect becomes even greater.
Practically, 10-20 meg ohms is a good value to shoot for with a 10-20pf
grid coupling cap. Much higher than that and the time constant of the
LC in the grid leak will swamp on keydown and recover SECONDS later
(10 or more sometimes) which can be problematic doing QSK with a regen.
If inductive coupling is used, no more than a two turn or so link is
required. Anything more is way overcoupled.
> I would be interested to find out what other folks used for the coil
> turns for the different bands.
Rulse de Thumbes for coils..... often can apply here, roughly speaking.....
Roughly 80 turns on a 2 inch soil for 160M,
Roughly 40 turns on a 2 inch coil for 80M,
Roughly 20 turns on a 2 inch coil for 40M,
Roughly 10 turns on a 2 inch coil for 20M,
etc, give or take a little, is good for play.
Those values and about 10-25pf of tuning capacitor will make for a fine
regenerator.
Some folks use more capacity and less coil, but I tend to find that the
lesser the capacitance, the greater the input impedance and signal strength.
I shoot for a single plate tuning capacitor of about 10-15pf max, and maybe
a little padding cap to set the band edge (roughly a 15pf trimmer, max), and
adjust the coils to suit based upon the above Rulse de Thumbes. Works for me.
This kind of thing is somewhat art and craft, based upon real science long
ago, and lost in the bilges of time. You kinda get a feel for it after a
while, and thumbing coils becomes second nature.
But, Welcome Aboard, and BUILD AWAY!!!!!!! That is the point of our group!
73/ZUT DE NA4G/Bob UP
What is this microschloth junk doing on unix!
> ------ =_NextPart_000_01BCEB6B.2C6732C0
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^^
EGADS! There goes gateseo and company messing things up again.
When will they learn what a real os is, and how to keep
it contained.....
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Date: Fri, 7 Nov 1997 14:55:35 -0800 (PST)
From: Ken Gordon <keng@uidaho.edu>
Subject: Re: Regen Receiver in November? SURE
What is the "C. F. Rocky Regen Book" and where can I find one?
Bob, are there regen rx articles/books in the GB archives?
Ken
Date: Fri, 7 Nov 1997 18:33:21 -0800 (PST)
From: Ken Gordon <keng@uidaho.edu>
Subject: Snazzy!!!!
I've got two HG-10Bs, see, and the one I am using (traded an HR-10B for
it) chrips and drifts pretty badly. Wasn't wired very well. It is stock.
Got another one awhile back, with a built-in powersupply. VERY nicely
built too. Doesn't work. Oscillator/buffer (6CH8) gets hotter than heck,
the screen voltage on the pentode section is about 5 volts, and the VR
tube goes out as soon as the osc. tube warms up. 6CH8 checked OK.
Took the 6CH8 home (from the shop) and plugged it into the working
(chriping) HG-10B, and lo and behold, it doesn't chrip or drift any more!
'Smazing!
Anyone got a couple of new 6CH8s they would sell? If not, I will post an
order to AES tomorrow.
Ken W7EKB
P.S. See someone on 3579 or 7050 tonight?
Date: Sat, 8 Nov 1997 03:24:57 +0000
From: Sandy W5TVW <ebjr@worldnet.att.net>
Subject: ARRL "Lightning Calculators"
Fellow Glowbuggers & Boatanchorites,
Has anyone approached the ARRL or another publisher about
reproducing the ARRL "type A" Lightning Calculator?
This is the one that allows you to figure how many turns of what
guage wire
is needed at "X" turns-per-inch, to yield an inductor of "X" microhenries.
It also allows you to see what range a given inductor and variable
capacitor
will tune. The range is from 400 Khz to 150 Mhz, 1 uH to 1500 uH, and 2 to 150
turns-per-inch. Indications are given for various wire guages from 2 to 36
guage,
enamelled, single cotton and silk covered and double cotton and silk covered
wire.
Coil dimensions range from 1/2" to 5-1/2" in diameter and from 1/4" to
10" in length. If you are into winding coils, it takes a lot of calculation and
guess work out of coil winding! Yes, I know there is probably a computer
program that does this, but you can't slip the computer inside a book or
take it to the "great white throne" to continue a design session!
I still have one in pretty good shape, but a brand-new one or two
would be
mighty nice! For those of you who haven't seen it, look in the ARRL "ads"
section of most of the 1960's Handbooks and earlier editions. It is a
circular slide
rule type device that is very easy to use, and extremely useful!
Comments anyone?
73,
E. V. Sandy Blaize, W5TVW
"Boat Anchors collected, restored, repaired, traded and used!"
417 Ridgewood Drive
Metairie, LA., 70001
**860 Hartley 'ECO' under construction****
*** Looking for a TRC-10 transceiver ******
*** looking for an RAL receiver ***********
Date: Sat, 8 Nov 1997 09:33:31 -0400
From: "Brian Carling" <bry@mnsinc.com>
Subject: Re: ARRL "Lightning Calculators"
Sandy et al., I thnk this has already been done.
It's called HAMCALC and I think you can get the program free from the
ARRL website. I may be mistaken...
Bry, AF4K
On 8 Nov 97 at 3:24, Sandy wrote:
> Fellow Glowbuggers & Boatanchorites,
>
> Has anyone approached the ARRL or another publisher about
> reproducing the ARRL "type A" Lightning Calculator?
> This is the one that allows you to figure how many turns of what
> guage wire
> is needed at "X" turns-per-inch, to yield an inductor of "X" microhenries.
> It also allows you to see what range a given inductor and variable
> capacitor
> will tune. The range is from 400 Khz to 150 Mhz, 1 uH to 1500 uH, and 2 to 150
> turns-per-inch. Indications are given for various wire guages from 2 to 36
> guage,
> enamelled, single cotton and silk covered and double cotton and silk covered
> wire.
> Coil dimensions range from 1/2" to 5-1/2" in diameter and from 1/4" to
> 10" in length. If you are into winding coils, it takes a lot of calculation and
> guess work out of coil winding! Yes, I know there is probably a computer
> program that does this, but you can't slip the computer inside a book or
> take it to the "great white throne" to continue a design session!
> I still have one in pretty good shape, but a brand-new one or two
> would be
> mighty nice! For those of you who haven't seen it, look in the ARRL "ads"
> section of most of the 1960's Handbooks and earlier editions. It is a
> circular slide
> rule type device that is very easy to use, and extremely useful!
> Comments anyone?
> 73,
> E. V. Sandy Blaize, W5TVW
> "Boat Anchors collected, restored, repaired, traded and used!"
> 417 Ridgewood Drive
> Metairie, LA., 70001
>
> **860 Hartley 'ECO' under construction****
> *** Looking for a TRC-10 transceiver ******
> *** looking for an RAL receiver ***********
>
>
>
****************************************************
*** 73 from Radio AF4K/G3XLQ Gaithersburg, MD USA *
** E-mail to: bry@mnsinc.com *
*** ICQ: 3910641 ***
** http://www.mnsinc.com/bry/ *
****************************************************
AM International #1024, TENTEN #13582. GRID FM19. Using a SWAN 250 on 6m,
Other rigs: Valiant, DX-60/HG-10, FT-840, TM-261, Ameco TX-62, Gonset Communicator III
HTX-202...TEN-TEN #13582, DXCC #17,763 Bicentennial WAS
Date: Sat, 8 Nov 1997 09:33:26 -0400
From: "Brian Carling" <bry@mnsinc.com>
Subject: Re: Snazzy!!!!
Ken, no need to spend high prices for small numbers of tubes like
that!
You can find many many sources of inexpensive 6CH8s and other tubes
at:
http://www.mnsinc.com/bry/mega/tubes.htm
I hope this helps you or someone else on the GB list!
I also run an HG-10B but never heard of one using a built-in power
supply!
Regards - Bry
On 7 Nov 97 at 18:33, Ken wrote:
> I've got two HG-10Bs, see, and the one I am using (traded an HR-10B for
> it) chrips and drifts pretty badly. Wasn't wired very well. It is stock.
> Got another one awhile back, with a built-in powersupply. VERY nicely
> built too. Doesn't work. Oscillator/buffer (6CH8) gets hotter than heck,
> the screen voltage on the pentode section is about 5 volts, and the VR
> tube goes out as soon as the osc. tube warms up. 6CH8 checked OK.
>
> Took the 6CH8 home (from the shop) and plugged it into the working
> (chriping) HG-10B, and lo and behold, it doesn't chrip or drift any more!
> 'Smazing!
>
> Anyone got a couple of new 6CH8s they would sell? If not, I will post an
> order to AES tomorrow.
>
> Ken W7EKB
>
> P.S. See someone on 3579 or 7050 tonight?
>
>
>
>
>
****************************************************
*** 73 from Radio AF4K/G3XLQ Gaithersburg, MD USA *
** E-mail to: bry@mnsinc.com *
*** ICQ: 3910641 ***
** http://www.mnsinc.com/bry/ *
****************************************************
AM International #1024, TENTEN #13582. GRID FM19. Using a SWAN 250 on 6m,
Other rigs: Valiant, DX-60/HG-10, FT-840, TM-261, Ameco TX-62, Gonset Communicator III
HTX-202...TEN-TEN #13582, DXCC #17,763 Bicentennial WAS
Date: Sat, 8 Nov 1997 11:52:50 -0500 (EST)
From: rdkeys@csemail.cropsci.ncsu.edu
Subject: Re: Regen Receiver in November? SURE
>
> What is the "C. F. Rocky Regen Book" and where can I find one?
I have no idea of what that book is, never having seen one, but I did
hear mention of the title on the lists a time or two.
Someone should give us a shortie book report on it?????
> Bob, are there regen rx articles/books in the GB archives?
The only thing up there now is Porter Quinby's 1928 tube base recevier
article from QST. I am working on a couple of others, but time....time.....
time.......................
Bob/NA4G
Date: Sat, 8 Nov 1997 12:19:11 -0500 (EST)
From: rdkeys@csemail.cropsci.ncsu.edu
Subject: Re: ARRL "Lightning Calculators" et al
> Sandy et al., I thnk this has already been done.
>
> It's called HAMCALC and I think you can get the program free from the
> ARRL website. I may be mistaken...
Hamcalc is good, but us OT pfartes don't have eniacs around, very often
on the bench. Yeah, I know, my unix workstation is 5 feet into the next
room, but geeesh.....(:+}}..... think luddite, or such, glowing '01A's,
spark era etc.
In actual practice, the precision required for GB projects is EXTREMELY
LOOSE in tolerances. That is why generic rules de thumbe can apply.
Most other circuit constants will have unpredictable effects on things,
so ballpark tolerance is usually adequate, with final tweaking probable.
> > Has anyone approached the ARRL or another publisher about
> > reproducing the ARRL "type A" Lightning Calculator?
There are several published nomograms dating from the 1920's that cover
this. I have one from an early ARRL Handbook (3rd edition) that I will
scan in, if I can get time. It was also published in several books of
the era, and in QST. They all will get you into the ballpark.
It would be neat to do some kind of a rehash in postscript or eps to
a typesetter that could run off that Lightning A thing on card stock,
and maybe make a usable one, again. Someone contact the ARRL, perhaps?
Does it have a copyright on it? Does the ARRL still have any around?
> > If you are into winding coils, it takes a lot of calculation and
> > guess work out of coil winding!
True, although if one tends to work 160/80/40M mostly, the generic rules
de thumbe still apply in most cases. The actual coil that one may wind
will vary considerably from the theoretical, based upon the coil form
material, the wire, strays, etc, and hand trimming to ``right-on'' is
usually always required, anyway, on most of my receivers, to suite my
tastes. On Hartleys, the generic rule of 12-15 turns for 80M and double
that for 200 meters and down, works over a very broad range of coil sizes
and wire sizes --- all to fit is padded down to suit in this case.
But, a real slipstick calculator of modern technology (not a gatesbound
thingie) would be fun to have.
> > **860 Hartley 'ECO' under construction****
I am awaiting this critter with baited breath!
Where ARE all the self-controlled oscillators folks are building?????
Is YOUR OT station (regenerator and Hartley project stuff) ready for
the December OT Fracas?
Bob/NA4G
Date: Sat, 8 Nov 1997 10:31:58 -0800 (PST)
From: "Tom R. Rice" <tomrice@netcom.com>
Subject: Re: Regen Receivers of the Rocky kind......
> > What is the "C. F. Rocky Regen Book" and where can I find one?
>
> I have no idea of what that book is, never having seen one, but I did
> hear mention of the title on the lists a time or two.
The book is "Secrets of Homebuilt Regenerative Receivers"
by C. F. "Rock" Rockey and it's available from our friends
at Lindsay.
The book has some very good dope on regurgitator theory and
practice and has several "buildable" circuits, including
the four-triode set with grounded-grid input amplifier,
which I'll have finished one of these days. Recommended.
In case of need:
Lindsay Publications, Inc.
PO Box 538
Bradley, IL 60915
phone: 815-935-5353
and ask to be put on their old-radio-books catalog
mailing list.
Have fun!
73 de WB6BYH
- --
"Start off every day with a smile and get it over with." --W.C.Fields
Tom R. Rice
tomrice@netcom.com
Date: Sat, 8 Nov 1997 15:01:25 -0500 (EST)
From: "Roberta J. Barmore" <rbarmore@indy.net>
Subject: Re: ARRL "Lightning Calculators" et al
Hi, BA Bob & the gang!
The later ARRL L/C/F calc, which does everything the circular Lightning
Calc did in a more conventional format, is copyright 1969 by Perrygraf
Div. Nashua Corp., L.A., Cal. 90064. It's 10"x4" and may still be
available from ARRL, though I don't find it in a recent ARRL Publications
flyer.
The original circular rule Lightning Calculator was actually copyright
by W. P. Koechel and distributed by Lightning Calculator Co. of Owensboro
Ky. I have a 1932 Koechel "Lightning Radio Calculator, Short Wave Type,"
model SWP-1. It is just like the old ARRL one, except for being printed
in one color and having no mention of the League; I suspect ARRL had
special editions printed by (or under license from) Koechel/Lightning
Calc. Co. It's actually in better shape than my newer ARRL one. It is a
little harder to learn to use. Gives the exact same results and adds the
luxury of scales for s.c.c and d.c.c. wire to the enamelled-wire scale,
plus markings for the amateur CW and 'phone bands (including 5m and the
old 400-401 mc/s bands). No copyright, though I would be loathe to take
it apart for reproduction--two moving cards and a celluloid cursor are
held together by a brass eyelet.
They are the handiest way to figure out coils & tuned-circuit
constants, bar none. The old standard coil nomograph (an abac to the rest
of the English-speaking world) found in "Radio" HBs and some ARRL pubs is
a bit of a beast, requiring extra calculation of the length/diameter ratio
and all but impossible to use without making marks on the page. I would
certainly not haul a computer down to my basement shop and expose it to
the usual workshop hazards! (Leave us to say that "shop" turns to "slop"
rather quickly here at Dots-n-dashes House!)
73,
--Bobbi
End of glowbugs V1 #152
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