Daily GLOWBUGS
Digest: V1 #35
via AB4EL Web Digests @ SunSITE
Purpose: building and operating vacuum tube-based QRP rigs
Subject: glowbugs V1 #35
glowbugs Sunday, May 18 1997 Volume 01 : Number 035
Date: Sat, 17 May 1997 21:41:23 +0000
From: "Brian Carling (Radio G3XLQ / AF4K)" <bry@mnsinc.com>
Subject: Re: HW 16?
On 17 May 97 at 15:30, Ken Gordon spoke about Re: HW 16? and said:
> > >
> > Hi, Leon:
> > Well, for one thing, if it works, you have bought a genuine
> > bargain. I
>
> Agreed. It is a neat little rig. I just bought one recently since
> some of my children now want to be hams. (About time!!!)
>
> > hehehe). The HW-16 receiver is a fairly sanitary superhet with a
> > bandwidth that's really a bit too broad -- or maybe a LOT too
> > broad -- to satisfy most CW ops.
>
> Too broad?!?!? Well, I guess if you are used to a Collins mech
> filter at 200 Hz, 500 hZ (the HW-16) might appear to be too broad.
> Personally, I think it just fine...then again, I prefer the 2.1 kHz
> filter for CW anyway so I can keep track of what is going on nearby.
> :-)
>
> Ken W7EKB
Yep, those psycho-cybernetic mental filters work fine for a while,
but you get tired of them after a while if the QRM is hot and heavy!
********************************************************
*** 73 from Radio AF4K / G3XLQ in Gaithersburg, MD USA *
** E-mail to: bry@mnsinc.com *
*** See the great ham radio resources at: *
** http://www.mnsinc.com/bry/ *
********************************************************
Date: Sun, 18 May 1997 00:27:31 -0500 (EST)
From: "Roberta J. Barmore" <rbarmore@indy.net>
Subject: Dayton!
Hi!
Went to Dayton this afternoon, and spent the whole day walking and
talking. Even ran into a few of the gang (Hi, Dave!), but met about as
many empty spaces, working from the list. Oh, well. Slept late & didn't
arrive 'til 2pm.
Was hoping to find a Sky Buddy, or a Millen 90801. Nope. (At 2pm Sat,
Dream On!)
But guess what! I found a Mac! Dear Tom Perrera had a table full of
keys, with Tom-type prices (doggone it, he knows the market too well!). I
showed up to yack and see if I could fondle some of the nicer ones (he had
*three* Cootie keys!), and got a chance to play with a vertical Vibroplex
(which works a *lot* better than I would have thought). Was pinin' over
the Macs, and lo and behold, he had one sans nameplate and repainted that
was within my budget! 'Tis a fine thing--just hope I have time to use it.
Also ended up with a UK WWII-ish key (says something about "8AMP" but I
'spect it's an ID number--and beseems me this critter is sort of the same
thing as a J-38 in terms of postwar availability in country of origin),
plus a cute "new antique," a NIB key made for USN in '44, and very nice.
Can't decide if it was intended as a trainer or a real key or what--has a
*jack* for a wedge plug in the side! Solid oval base, most unusual.
That was about it, though I did find a couple of the small-skirt
GE/National verniers, as used in the BC-375(?)--somebody here was looking
for same and if he still is, lemme know; paid $5.00 @ for this set. Also
a crystal...but not that kind--a nifty semi-fixed galena detecting
crystal, 1920s-ish.
Was a good day. Still haven't ever gone inside the buildings at the
Dayton Hamvention--they tell me ER & Vibroplex are in there but it's a lot
of walking for a few stops and too much solid-state stuff around 'em. ;)
73,
--Bobbi
PS: Once again, the truck drivers on I-70 proved themselves the people
I most like to share a highway with--they're rational, predictable and
polite (at least while driving). Of course they also laugh profusely at
the tiny Suzuki Samuri zipping along at 65+mph--this is good, it's so
small they might not see it otherwise! (The power/weight ratio of the
Suzuki is about the same as a semi--so I usually end up around trucks).
Date: Sun, 18 May 1997 11:17:57 +0000
From: janax@mail.li.icl.se
Subject: Re: Tube H..E..L..P..
> From: Gerald Caouette <ve6nap@oanet.com>
> I have some JAN 7645 Valves (Tubes)
> 9 pin mini
> Military PN 5960-00-828-1217
> Packaged in Westinghouse boxes
I don't have data on 7645 but dug deep in my documentation here:
My books show 6939 and QQE02/5 as near relatives. It's a small double
beam power tetrode for VHF push-pull output usage.
The pinning for QQE02/5 is:
1: grid I
2: common cathode
3: grid II
4,5: heater
6: plate I
7: common screen grid
8: plate II
9: heater center tap
Some data below:
C telegraphy: Va = 180V, Vg2 = 180V, Ia = 56mA, Po = 5.8W at 500 MHz
C ag2 mod: Va = 180V, Vg2 = 180V, Ia = 40mA, Po = 4.2W at 500 MHz
Values are for both halves in push-pull.
Heater: 6.3V 0.6A (pin 4+5 to 9) or 12.6V 0.3A (pin 4 to 5)
Please note that it is a close relative, not a replacement but you
should be able to determine if the pinning is the same.
> And some JAN 5719 Valves (tubes)
> 8 lead miniature tube
> about 0.375 " diameter X 1.25" long with 1.5" leads
> Military PN 5960-00-228-0636
> Package says simalar to CV-4008
5719 is an AF triode in an 8 wire submini package. Pinning is:
1: grid
2,4,7: not connected
3,6: heater
5: cathode
8: plate
Pin numbering is the same as normal sized tubes, bottom view with the
gap down, pin 1 first to left.
Typical operating point:
Va = 100V, Rk = 1.5kohm, Ia = 0.73mA, S = 1.7mA/V, Ri = 41kohm
mu = 70
Max Pa = 0.55W, Max Ik = 3.3mA, Peak Vkf = 200V
Heater is 6.3V 0.15A
73
- ---
Jan, SM5GNN
Linkoeping, Sweden
Date: Sun, 18 May 1997 11:17:57 +0000
From: janax@mail.li.icl.se
Subject: Re: Glowbugs Archives - let me know if there are problems.
> From: rdkeys@csemail.cropsci.ncsu.edu
> The gnuzipper for dos is there (gzip.exe) and is invoked as:
>
> gzip -d filename.xxz
>
> to make filename.xx.
If you are lazy, copy or rename gzip.exe to gunzip.exe. Invoke as:
gunzip filename.xxz
Clever proggie. It checks what name it was invoked as and if it
founds itself by name gunzip, defaults to "-d". On unix, make
a symbolic link from gunzip to gzip if not already done.
Jan, SM5GNN
Linkoeping, Sweden
Date: Sun, 18 May 1997 08:19:51 +0100
From: BOB DUCKWORTH <bob@atl.org>
Subject: Re: HW 16?
HW-16 is a bit broad.
Can be fixed somewhat by reducing drive to filter and
a bit of sheilding around filter.
Additional xtals may be added for better skirts too.
It's a radio that is cheap enough and common enough to
modify to your hearts content.
Can be put on 20m instead of 15.
I added a little VFO to mine, built in.
Funky but worked (well chirped a bit :-)
Jeff in Hawaii has it now.
Where is Jeff, did the 'lil boat sink while he was sleeping?
Only problem I've seen with them is the bandswitch.
Ceramic from a hamfest will fix that.
- -bob
wb4mnf
Date: Sun, 18 May 1997 08:17:49 -0700 (PDT)
From: Ken Gordon <keng@uidaho.edu>
Subject: Re: 3579 & 7050 funzies
On Sat, 17 May 1997, Brian Carling (Radio G3XLQ / AF4K) wrote:
> Can you tell us about that swap net, Ken?
>
It was on 7240 kHz SSB. I heard it yesterday (Saturday). It was in the
afternoon. Don't recomemeber the exact time, but I think it was about
4:30 PM PDT. The NCS was reading from a long list of WTB and WTS stuff.
Mostly modern rice-boxes, but some not. He was operating VOX and was
being broken often. He would then get the two contacts together. I know
a member of this list was looking for a Millen grid-dip meter and there
was one offered as the last item in the list. Whoever offered it wanted
$80 for it complete, in the case, with all coils. That is all I know, but
I will listen today and see what else I can learn. My SSB rig is broken
and I am not really in any real hurry to fix it. I'm having too much fun
with the 109!
Ken W7EKB
Date: Sun, 18 May 1997 10:29:18 -0500 (CDT)
From: Bob Roehrig <broehrig@admin.aurora.edu>
Subject: Cheap CW filter
I have seen some discussion concerning receiver selectivity and thought
I would throw this out for comment. A cheap and easy way to increase
selectivity, audio-wise, is to use a series L-C circuit in an audio
stage of the receiver. This can be switched across the cathode resistor
in an audio stage easily. If the cathode resistor is bypassed with a
capacitor, which is usually the case (especially in the power output
stage), the cap must be switched out when the L-C circuit is switched
in. What I have used in the past is one of the common (used to be common
anyway) 88mh toroids popular with the RTTY folks. That in series with
about .75uf makes the circuit makes it resonant around 700 Hz.
E-mail broehrig@admin.aurora.edu 73 de Bob, K9EUI
CIS: Data / Telecom Aurora University, Aurora, IL
630-844-4898 Fax 630-844-5530
Date: Sun, 18 May 1997 08:35:19 -0700 (PDT)
From: Ken Gordon <keng@uidaho.edu>
Subject: Re: HW 16?
Hi!
Thanks for the info!
I have come up with a very easy (to my mind) conversion for the HW-16 to
use the receiver VFO for the transmitter, with RIT. If anyone is
interested I will send it.
Kenneth G. Gordon W7EKB College of Mines and Earth Resources
226 N. Washington St. //or// University of Idaho
Moscow, Idaho 83843 Moscow, Idaho 83844
(208)-882-8745 (208)-885-6133
Great Highland Pipes, Amateur Radio, Electronic Consulting, Home-Schooling
Traditional Roman Catholic
My PGP Public Key Upon Request.
On Sun, 18 May 1997, BOB DUCKWORTH wrote:
> HW-16 is a bit broad.
> Can be fixed somewhat by reducing drive to filter and
> a bit of sheilding around filter.
> Additional xtals may be added for better skirts too.
> It's a radio that is cheap enough and common enough to
> modify to your hearts content.
> Can be put on 20m instead of 15.
> I added a little VFO to mine, built in.
> Funky but worked (well chirped a bit :-)
> Jeff in Hawaii has it now.
> Where is Jeff, did the 'lil boat sink while he was sleeping?
> Only problem I've seen with them is the bandswitch.
> Ceramic from a hamfest will fix that.
> -bob
> wb4mnf
>
Date: Sat, 01 Mar 97 09:19:47 PST
From: "Adam, KD6POC" <kd6poc@jps.net>
Subject: Baked On Finishes
Hello There, Glowbuggers!
Does anyone know a good way to bake on an Enamel finish? I would like to =
add a durable coat of paint to homebrewed equipment, but nobody seems to =
know how to do it. Any suggestions?
Thanks!
Adam McLaughlin KD6POC
QRG: 7037 KHz
kd6poc@jps.net
http://www.jps.net/jmclaugh
Date: Sun, 18 May 1997 13:10:44 -0400 (EDT)
From: leeboo@ct.net (Leon Wiltsey)
Subject: NEED PART
>To: BA
>From: leeboo@ct.net (Leon Wiltsey)
>Subject: NEED PART
>Cc:
>Bcc:
>X-Attachments:
>
>Hi Gang
>
>Here I sit in this little one horse town, needing a
>rec type cariable cap. Size not critical as I am
>building coil to match. The only one I had I used
>in my regen, and yesterday the plates started coming
> loose. Looked all over town for an old rec to yank one
> out of no luck. So here I am rec is nw.and I need a part.
> I probably will get many offers and intend to take you
> up on all of them. Something like a 140mmfd or even
> as high as 365 from a old broadcast tuner will due.
>tnx agn for all your help. 73 73 73
>
68 yr old semidisabled senior
(stroke got my balance & hand to eye coordination)
old old old ham but I'm back agn
now KF4RCL TECK+ (MUCH HAPPINESS)
PLAY KEYBOARD AND SING?
BUILD MOST OF MY STATION EQUIP
(tubes that is no SOLID STATE)
no trash music (anything composed after 1965)
Leon B Wiltsey (Lee)
4600 Lake Haven BLVD.
Sebring, Fl. 33872
SEBRING FL. THAT WONDERFUL PLACE WHERE THERE IS NO QRM
FROM ANYTHING LOCAL
Date: Sun, 18 May 1997 09:54:28 -0700 (PDT)
From: Ken Gordon <keng@uidaho.edu>
Subject: Re: HW 16?
> > > hehehe). The HW-16 receiver is a fairly sanitary superhet with a
> > > bandwidth that's really a bit too broad -- or maybe a LOT too
> > > broad -- to satisfy most CW ops.
> >
> > Too broad?!?!? Well, I guess if you are used to a Collins mech
> > filter at 200 Hz, 500 hZ (the HW-16) might appear to be too broad.
> > Personally, I think it just fine...then again, I prefer the 2.1 kHz
> > filter for CW anyway so I can keep track of what is going on nearby.
> > :-)
> >
> > Ken W7EKB
>
> Yep, those psycho-cybernetic mental filters work fine for a while,
> but you get tired of them after a while if the QRM is hot and heavy!
Yer right, of course, but, except when I was heavy into traffic handling,
I hardly ever used vy narrow selectivity since usually the CW tone chosen
by the manufacturer was too darned high for my liking.
Usually, I avoid situations where the QRM is heavy....Hmmm...do remember
nearly starting an international "incident" when I told a bunch of Cuban
army stations sitting smack on top of 3560 kHz (RN7 net freq) to "get
*******" in Spanish. It seemed to me at the time that they were purposely
QRMing us. In any case, the CW really flew back and forth there for a few
minutes. Didn't hear them after that. I was running a pair of 813s at
the time.
73,
Ken W7EKB
Date: Sun, 18 May 1997 10:01:16 -0700 (PDT)
From: Ken Gordon <keng@uidaho.edu>
Subject: Re: Baked On Finishes
On Sat, 1 Mar 1997, Adam, KD6POC wrote:
> Hello There, Glowbuggers!
>
> Does anyone know a good way to bake on an Enamel finish? I would
> like to add a durable coat of paint to homebrewed equipment, but nobody
> seems to know how to do it. Any suggestions?
For aluminum, you should first wash it with vinegar to break the oxide
coating a bit, then prime it with zinc chromate (kind of a chartreuse
color). Can't really advise you on the paint. I use spray enamel from
the local hardware store since I don't know where to get wrinkle paint
anymore. Then I bake it in wife's oven at about 150 degrees for several
hours....when she lets me. There was an article in Hints and Kinks a few
years ago about building a "baker" out of an old refrigerator with a hot
plate at the bottom.
Ken W7EKB
Date: Sat, 17 May 1997 12:21:46 -0500
From: Ray LaRue <raylarue@gte.net>
Subject: Re: Tube H..E..L..P..
janax@mail.li.icl.se wrote:
>
> > From: Gerald Caouette <ve6nap@oanet.com>
>
> > I have some JAN 7645 Valves (Tubes)
> > 9 pin mini
> > Military PN 5960-00-828-1217
> > Packaged in Westinghouse boxes
>
> I don't have data on 7645 but dug deep in my documentation here:
> My books show 6939 and QQE02/5 as near relatives. It's a small double
> beam power tetrode for VHF push-pull output usage.
> The pinning for QQE02/5 is:
> 1: grid I
> 2: common cathode
> 3: grid II
> 4,5: heater
> 6: plate I
> 7: common screen grid
> 8: plate II
> 9: heater center tap
> Some data below:
> C telegraphy: Va = 180V, Vg2 = 180V, Ia = 56mA, Po = 5.8W at 500 MHz
> C ag2 mod: Va = 180V, Vg2 = 180V, Ia = 40mA, Po = 4.2W at 500 MHz
> Values are for both halves in push-pull.
> Heater: 6.3V 0.6A (pin 4+5 to 9) or 12.6V 0.3A (pin 4 to 5)
> Please note that it is a close relative, not a replacement but you
> should be able to determine if the pinning is the same.
>
> > And some JAN 5719 Valves (tubes)
> > 8 lead miniature tube
> > about 0.375 " diameter X 1.25" long with 1.5" leads
> > Military PN 5960-00-228-0636
> > Package says simalar to CV-4008
>
> 5719 is an AF triode in an 8 wire submini package. Pinning is:
> 1: grid
> 2,4,7: not connected
> 3,6: heater
> 5: cathode
> 8: plate
> Pin numbering is the same as normal sized tubes, bottom view with the
> gap down, pin 1 first to left.
> Typical operating point:
> Va = 100V, Rk = 1.5kohm, Ia = 0.73mA, S = 1.7mA/V, Ri = 41kohm
> mu = 70
> Max Pa = 0.55W, Max Ik = 3.3mA, Peak Vkf = 200V
> Heater is 6.3V 0.15A
>
> 73
> ---
> Jan, SM5GNN
> Linkoeping, SwedenJan,
My RCA, 1973 Industrial tube guide, says the RCA direct replacement for
the 7645, is a 6939.
73,
Ray, W4BYG
Date: Sat, 17 May 1997 10:39:03 -0700
From: Ken Lopez <kjlopez@earthlink.net>
Subject: Re: 3579 & 7050 funzies
The swap net you heard is the West Coast Swap Service, hosted by
Clarence, W6DFG. It has been on for over twenty years. Saturday and
Sunday, 12:30PM pacific time, 7.240KHz. List three items for sale or
want to buy.
Format: Callsign in phonetics (standard), Name, QTH, Listing, price,
phone number including area code. He is a stickler for the format.
List once per weekend. He reads the list at 3:00PM, and both lists on
Sunday. I have gotten lots of good buys from that list.
Hope that helps,
Ken, N6TZV
Date: Sun, 18 May 1997 15:45:50 -0700
From: Gerald Caouette <ve6nap@oanet.com>
Subject: 480 Volt AC time delay relays for sale
I have 6 only
AGASTAT Model 7012L10KN
Time delay on Pick up relays
Adjustable from 1 to 300 Seconds
Coil is 440 Volt AC 60 Cycle
Great industrial control relay
Contacts are rated 20 Amps at 240 VAC
or 12 Amps at 480 VAC
I am offering these for 50.00 U$ each or take all 6 for 275.00 U$
Shipping Extra
Email if intrested
to
Gerald Caouette
de
ve6nap@oanet.com
Date: Sun, 18 May 1997 16:27:47 -0700
From: Gerald Caouette <ve6nap@oanet.com>
Subject: 807 equivelents and other tubes 4 sale
I have the following tubes
As I only want a few of these for my own use
I am offering the rest for sale
I have 80 Jan 7645 Twin tetrodes for sale
NIB/NOS in original Westinghouse Boxes
and would like $ 3.00 U$ each
or
5 for 12.00
10 for 20.00
I have 100 NIB/NOS JAN 5719 miniature triodes
and would like $ 2.50 U$ each
or
5 for $10.00 U$
25 for 48.00 U$
50 for $90.00 U$
I still have 700 NIB/NOS JAN 5933 valves
These are a military equivelent to the 807
Same base, pin out and electrical specifications
looking for $6.00 U$ each
or
4 for 20.00 U$
10 for 45.00 U$
50 for 200.00 U$ ( 1 case )
100 for 375.00 U$ ( 2 cases )
All prices are in US funds
Shippng costs are extra extra
email if intrested
to
ve6anp@oanet.com
Edmonton, Alberta, Canada
Date: Sun, 18 May 1997 19:41:48 -0400 (EDT)
From: leeboo@ct.net (Leon Wiltsey)
Subject: NEED PART
>To: BA
>From: leeboo@ct.net (Leon Wiltsey)
>Subject: NEED PART
>Cc:
>Bcc:
>X-Attachments:
>
>Hi Gang
>
>Here I sit in this little one horse town, needing a
>rec type cariable cap. Size not critical as I am
>building coil to match. The only one I had I used
>in my regen, and yesterday the plates started coming
> loose. Looked all over town for an old rec to yank one
> out of no luck. So here I am rec is nw.and I need a part.
> I probably will get many offers and intend to take you
> up on all of them. Something like a 140mmfd or even
> as high as 365 from a old broadcast tuner will due.
>tnx agn for all your help. 73 73 73
>
SUB TO BOTH GLOWBUGS & BOATABCHORS
68 yr old semidisabled senior
(stroke got my balance & hand to eye coordination)
old old old ham but I'm back agn
now KF4RCL TECK+ (MUCH HAPPINESS)
PLAY KEYBOARD AND SING?
BUILD MOST OF MY STATION EQUIP
(tubes that is no SOLID STATE)
no trash music (anything composed after 1965)
Leon B Wiltsey (Lee)
4600 Lake Haven BLVD.
Sebring, Fl. 33872
SEBRING FL. THAT WONDERFUL PLACE WHERE THERE IS NO QRM
FROM ANYTHING LOCAL
Date: Sun, 18 May 1997 20:07:32 -0400
From: "Greg Parsons A.K.A. Rat" <gregp@MIS.Net>
Subject: Re: Baked On Finishes
Hello gang,
You could do like I have for some small stuff, spray epoxy, it comes in a
can and you can find it at hobby shops that deal with RC planes, Red Baron
brand seems to work best for me. One problem, 48 hour drying time, and they
do mean 48 hours!
73,
Greg
ke4ooo
At 09:19 AM 3/1/97 PST, you wrote:
>Hello There, Glowbuggers!
>
>Does anyone know a good way to bake on an Enamel finish? I would like to
add a durable coat of paint to homebrewed equipment, but nobody seems to
know how to do it. Any suggestions?
>
>Thanks!
>
>Adam McLaughlin KD6POC
>QRG: 7037 KHz
>kd6poc@jps.net
>http://www.jps.net/jmclaugh
>
- -------------------------------------------------------------------------------
| Greg Parsons KE4OOO gregp@mis.net gregp@lfucg.com |
| AMI #865 DoD 862 Who has the coffee? Better yet, who has the Ale8one? |
| NRA Life, SCCA, SCA http://www.stdio.com/~gregp http://www.lfucg.com |
- -------------------------------------------------------------------------------
"Religiones antiquae et arma ridiculae non comparant cum
bono telo eruptionis igneae latero te, puer." Hanno Solare
Date: Sun, 18 May 1997 20:09:09 -0400
From: Adam Liette <kb8ydx@geocities.com>
Subject: 6m Glowbug
Hello. Anyone have a diagram of a simple Glowbug fer 6m?
I'd like to try one.
TNX ES CUL
Adam Liette
URL:kb8ydx.base.org
E-Mail:kb8ydx@geocities.com
- --------- --------
/ |
/ ----| / ___
/ | |___
/ -------- ___|
End of glowbugs V1 #35
**********************
Created by Steve Modena, AB4EL
Comments and suggestions to modena@SunSITE.unc.edu