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Today's Topics:
1. Re: HAMFEST REMINDER --- THIS SUNDAY (John Dilks K2TQN)
2. 20V2 FS Sweetwater, TN (crawfish)
3. Re: DX-40 plus other Heath stuff FS on QTH.com (Bry Carling)
4. Re: AWA Re: [AMRadio] HAMFEST REMINDER --- THIS SUNDAY
(Geoff/W5OMR)
5. Re: VFO vs XTAL (D. Chester)
6. Re: Amateur Radio Vet Turns 100 (D. Chester)
7. Re: AWA Re: [AMRadio] HAMFEST REMINDER --- THIS SUNDAY
(D. Chester)
8. Hamfests (D. Chester)
9. Re: AWA Re: [AMRadio] HAMFEST REMINDER --- THIS SUNDAY
(RJ Mattson)
10. Re: Hamfests (david knepper)
----------------------------------------------------------------------
Message: 1
Date: Thu, 18 Oct 2007 05:36:15 -0400
From: John Dilks K2TQN <[EMAIL PROTECTED]>
Subject: Re: [AMRadio] HAMFEST REMINDER --- THIS SUNDAY
To: Discussion of AM Radio in the Amateur Service
<[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Hi John,
I'm planning to attend and am looking forward to it. Tnx for the
warning on being early.
73, John Dilks, K2TQN
At 10:20 PM 10/17/2007, you wrote:
Here is a reminder to all amateur radio operators of a free vintage
hamfest
to be held in Davidsonville, MD this Sunday. If you really love old
gear, here
is a tip especially for those living in the Mid-Atlantic area. MAARC, the
Mid
Atlantic Antique Radio Club has decided to reach out to amateur radio
enthusiasts, especially those interested in boatanchors. In light of
this, they are
inviting all interested amateurs to a combined Antique Radio Meet and
Vintage
Hamfest. The event will be held at 9:00AM Sunday, October 21st at the
Davidsonville Family Recreation Center, Davidsonville, MD.
Davidsonville is located near
Bowie, MD, in the Washington DC suburbs. It is easily reachable via US
Route
50 and this connects to the Washington Beltway and the Chesapeake Bay
Bridge.
For you Southerners, US 301 or I-95 are options.
------------------------------
Message: 2
Date: Thu, 18 Oct 2007 04:41:51 -0500
From: "crawfish" <[EMAIL PROTECTED]>
Subject: [AMRadio] 20V2 FS Sweetwater, TN
To: [email protected]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="iso-8859-1"
W4OLJ has a Collins 20V2 for sale on QTH for $2500. Just taken out of
service and is presently on 1460 kHz. Ad#617369.
Joe W4AAB
------------------------------
Message: 3
Date: Thu, 18 Oct 2007 07:03:59 -0400
From: "Bry Carling" <[EMAIL PROTECTED]>
Subject: Re: [AMRadio] DX-40 plus other Heath stuff FS on QTH.com
To: Discussion of AM Radio in the Amateur Service
<[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=US-ASCII
Even with accessories, it seems like he could wait a long time to
sell a DX40 for $300.00
WA0MNA has a Heath station with DX-40 as the transmitter for sale for
$300. shipped.Ad#624294. No receiver, but antenna tuner and VF-1 VFO and
other accessories.He said he needs the bucks. Even a Conelrad Monitor!!
Joe W4AAB
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------------------------------
Message: 4
Date: Thu, 18 Oct 2007 06:30:19 -0500
From: Geoff/W5OMR <[EMAIL PROTECTED]>
Subject: Re: AWA Re: [AMRadio] HAMFEST REMINDER --- THIS SUNDAY
To: Discussion of AM Radio in the Amateur Service
<[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
RJ Mattson wrote:
When will it dawn on the AWA to team up with the Rochester, NY hamfest?
bob...w2ami
Perhaps they don't -want- to.
They've got some pretty strict (and justifiable) requirements.
--
Driving your AM Rig without a scope,
is like driving your car at night, without headlights. (K4KYV)
--
73 = Best Regards,
-Geoff/W5OMR
------------------------------
Message: 5
Date: Thu, 18 Oct 2007 07:35:06 -0500
From: "D. Chester" <[EMAIL PROTECTED]>
Subject: Re: [AMRadio] VFO vs XTAL
To: <[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
If the VFO has a coupling cap, tie the VFO output directly to the grid
of the buffer and see what happens. If you don't have enough then, move
back to the grid of the Osc. Just be careful of driving the Osc too
strongly.
Jim/W5JO
In my Gates BC1-T I modified the 12BY7 xtal oscillator and converted it to
a
grounded-grid buffer. Simple - bypass the grid to ground with a .005 or
.01
mfd capacitor. The cathode already has an rf choke to ground, and the
xtal
feedback circuit connects to the cathode through a capacitor. Disconnect
the feedback lead, and replace it with a .01 capacitor, and use that
capacitor to couple the rf from the outboard vfo directly to the cathode
of
the stage.
That makes it very easy to convert back to stock if desired. The vfo
outut
needs to be low impedance. Mine measures about 1/4 watt into a 50-ohm
resistor dummy load. That drives the 12BY7 perfectly.
I use a similar scheme with the same vfo to drive the homebrew rig, to
feed
the type 59 input stage. I have it wired to automatically convert to the
conventional pentode xtal oscillator circuit with the vfo plug removed
plus
one jumper connection.
VFO's like the 122 and VF-1 are high-z output, directly from the plate of
the oscillator tube. You would need to add an additional stage to boost
the
power to 250mw at low-Z. An untuned cathode follower stage might do the
trick.
I use a highly modified T-368 master oscillator unit as my VFO. The type
6000 tube was replaced with a 6AG7 (socket rewiring required), with about
200 volts on the plate. A coupling link was added to each of the slug
tuned
output coils. That required modification of the bandswitch, with the
addition of another wafer section. The addition of the cupling coil
affected the tuning linearity of output stage somewhat, but it still gives
pefectly uniform output across each ham band, which is all that counts,
but
the output drops off at the unused frequencies at extreme ends of each
tuning range. The stock unit delivered uniform output from 1.5 through
about 20 mHz, directly into the grid of the 4-250.
My vfo is connected to the transmitter through a RG-59 coax line. I have
used as much as 15' of cable. You can't do that with a stock 122 or VF-1.
If the vfo cable is more than a few feet long, you lose output. The
output
circuit has a slug-tuned coil at the plate, which feeds through a coupling
capacitor to the coax line feeding the transmitter. The capacitance of
the
coax line resonates with the coil to form a broadly resonant circuit to
feed
the grid of the 1st stage in the t ransmitter. If the coax is too long,
it
won't hit resonance. I once used a VF-1, and tried replacing the output
coil with one that would resonate with a long run of coax, but it tuned
too
sharply, and wouldn't supply full grid drive across the entire band.
Don k4kvy
------------------------------
Message: 6
Date: Thu, 18 Oct 2007 07:38:10 -0500
From: "D. Chester" <[EMAIL PROTECTED]>
Subject: [AMRadio] Re: Amateur Radio Vet Turns 100
To: <[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Didn't he collaborate with another ham from NC ad write an article, or
maybe
a series of articles a couple of decades ago about ground radials? If
that's who it is, I have worked him over the air many times.
Don k4kyv
------------------------------
Message: 7
Date: Thu, 18 Oct 2007 07:49:58 -0500
From: "D. Chester" <[EMAIL PROTECTED]>
Subject: Re: AWA Re: [AMRadio] HAMFEST REMINDER --- THIS SUNDAY
To: <[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I just wish the AWA meet weren't so far away. I've never been to one -
just
too many miles to drive for a swapmeet, and no-one around here is
interested
in teaming up for the trip.
I did attend the Rochester hamfest a couple of times when I lived in
Massachussetts, back in the 70's. It was great for just the kind of stuff
I
look for, but like all other hamfests, that has no doubt changed by
now.
I remember one year, when I did not attend, NY state tax agents came on
site and closed the entire flea market down because some kind of paper
work
had not been submitted in proper form. I'm surprised it didn't incite a
riot.
Don k4kyv
------------------------------
Message: 8
Date: Thu, 18 Oct 2007 08:04:52 -0500
From: "D. Chester" <[EMAIL PROTECTED]>
Subject: [AMRadio] Hamfests
To: <[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Our local hamfests ban computer scrap entirely. No computer items
allowed
whatsoever. Anyone found selling computer debris is escorted off the
property. Has worked brilliantly for he last 5 years. It a pleasure and
a
blessing to only find proper radio stuff at local festers.
Ed, VA3ES
Just about as annoying at hamfests is the non-radio related arts 'n crafts
junk. I have seen some hamfests that were more like a general fleamarket,
with jewellery, paintings and drawings, dolls, etc. in addition to all the
computer scrap. If you looked hard enough you might find a little radio
stuff scattered in between.
One of the most pleasant hamfest flea markets I ever remember was in the
early 80's at Chattanooga, TN. It was held at the UT campus, in a
parking
lot next to the cafeteria. The flea market was divided into two distinct
sections. One was for arts and crafts and other non-radio items, while
the
other was strictly for radio and electronic items. There were loads of
vintage parts on display. To cap it off, there was a very mellow sounding
local rock band playing - not too loud, just right for pleasant background
music, but you could still easily talk over it. The cafeteria opened for
lunch, and they had a good menu of real food instead of the normal hamfest
slop.
Unfortunately, they held the hamfest at that venue only one year. From
then
on, it became a typical indoor flea market with practically nothing of
interest to me. I attended the indoor event once and decided it was not
worth the trip.
Don k4kyv
------------------------------
Message: 9
Date: Thu, 18 Oct 2007 09:14:22 -0400
From: "RJ Mattson" <[EMAIL PROTECTED]>
Subject: Re: AWA Re: [AMRadio] HAMFEST REMINDER --- THIS SUNDAY
To: "Discussion of AM Radio in the Amateur Service"
<[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="iso-8859-1"
I think the idea is to get exposure and new AWA members to a dying
organization.
Segregating AWA member/sellers to one area should be easy.
bob...w2ami
----- Original Message -----
From: "Peter Markavage" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, October 17, 2007 11:31 PM
Subject: Re: AWA Re: [AMRadio] HAMFEST REMINDER --- THIS SUNDAY
Probably the AWA doesn't want its members to have to wade through 3
aisles of computer junk just to find an antique radio seller. The nice
thing about the AWA gathering is that their buyers and sellers are
focused on a very niche time frame.
And, don't forget, there is a big hamfest in Sellersville, PA this
Sunday, 10/21. Weather forecast looks perfect.
Pete, wa2cwa
On Wed, 17 Oct 2007 22:55:36 -0400 "RJ Mattson" <[EMAIL PROTECTED]>
writes:
When will it dawn on the AWA to team up with the Rochester, NY
hamfest?
bob...w2ami
----- Original Message -----
From: <[EMAIL PROTECTED]>
Subject: [AMRadio] HAMFEST REMINDER --- THIS SUNDAY
Here is a reminder to all amateur radio operators of a free vintage
hamfest
to be held in Davidsonville, MD this Sunday. If you really love old
gear,
here
is a tip especially for those living in the Mid-Atlantic area.
MAARC, the
Mid
Atlantic Antique Radio Club has decided to reach out to amateur
radio
enthusiasts, especially those interested in boatanchors. In light of
this,
they are
inviting all interested amateurs to a combined Antique Radio Meet
and
Vintage
Hamfest................................
73 and hope you can make it.
John, W4AWM
______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
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------------------------------
Message: 10
Date: Thu, 18 Oct 2007 09:36:50 -0400
From: "david knepper" <[EMAIL PROTECTED]>
Subject: Re: [AMRadio] Hamfests
To: "Discussion of AM Radio in the Amateur Service"
<[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
Has anyone ever considered that our XYLs also enjoy attending hamfests.
My wife enjoys accompanying me to hamfests because of the variety of items
for sale that are non-ham related. Many ladies, as you know, are not
interested in rummaging through a box of old tubes or drooling over some
old
boatanchor. If you don't care to look at computer equipment, etc., then
walk on but please don't put a sign up at the gate restricting sales to
ham
gear exclusively.
Dave, W3ST - W3CRA
Collins Radio Association
www.collinsra.com
Join the largest Collins group in the world
Nets on 7208 at 4:30 EDST every day and
Monday at 3805 at 8 PM EDST
----- Original Message -----
From: "D. Chester" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, October 18, 2007 9:04 AM
Subject: [AMRadio] Hamfests
Our local hamfests ban computer scrap entirely. No computer items
allowed
whatsoever. Anyone found selling computer debris is escorted off the
property. Has worked brilliantly for he last 5 years. It a pleasure
and
a
blessing to only find proper radio stuff at local festers.
Ed, VA3ES
Just about as annoying at hamfests is the non-radio related arts 'n
crafts
junk. I have seen some hamfests that were more like a general
fleamarket,
with jewellery, paintings and drawings, dolls, etc. in addition to all
the
computer scrap. If you looked hard enough you might find a little radio
stuff scattered in between.
One of the most pleasant hamfest flea markets I ever remember was in the
early 80's at Chattanooga, TN. It was held at the UT campus, in a
parking lot next to the cafeteria. The flea market was divided into two
distinct sections. One was for arts and crafts and other non-radio
items,
while the other was strictly for radio and electronic items. There were
loads of vintage parts on display. To cap it off, there was a very
mellow
sounding local rock band playing - not too loud, just right for pleasant
background music, but you could still easily talk over it. The cafeteria
opened for lunch, and they had a good menu of real food instead of the
normal hamfest slop.
Unfortunately, they held the hamfest at that venue only one year. From
then on, it became a typical indoor flea market with practically nothing
of interest to me. I attended the indoor event once and decided it was
not worth the trip.
Don k4kyv
______________________________________________________________
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------------------------------
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End of AMRadio Digest, Vol 45, Issue 37
***************************************
