Is there a simple bench test or an eyeball way to tell the difference
between a fixed and swinging choke? Something about an air gap if I remember
but not all my chokes are open frames.
Carl
KM1H
__
Our Main Website:
-- Forwarded message --
From: VJB [EMAIL PROTECTED]
Date: Dec 7, 2007 7:32 PM
Subject: not [EMAIL PROTECTED]
To: Brian W5AMI [EMAIL PROTECTED]
I've submitted a draft of the following article to be
published as a freestanding story on eham.net, QRZ.com
and amfone.net.
I also am
I've had good luck with J J (tesla) tubes for output
tubes, EL34 and EL84. I've had good luck with Sovtek
preamp 12AX7s but not 6L6s. I use NOS that I have
collected from various sources, especially hamfests.
The Electro Harmonix 6L6s seem to be fine, I think
that they are picked out Sovteks and
Carl,
Saturable reactors SWINGING CHOKES and saturable transformers are
strange in the way they operate. A choke does not exactly lose it reactance
as the DC current is increased thru it but instead it loses its ability to
react over a certain period of AC cycle and AC current level as
- Original Message -
From: John Coleman [EMAIL PROTECTED]
To: 'Discussion of AM Radio in the Amateur Service'
amradio@mailman.qth.net
Sent: Saturday, December 08, 2007 2:51 PM
Subject: RE: [AMRadio] How to ID a swinging choke?
Carl,
Saturable reactors SWINGING CHOKES and saturable
Does anyone have the schematic of the Heath PS 4 power supply. If you
do and could email, I would appreciate it. If you can't email I would
pay copy and postage.
Jim/W5JO
__
Our Main Website: http://www.amfone.net
AMRadio mailing
Yep, I see your dilemma Carl, Maybe I am wrong but I don't think there is
any difference other than the amount of magnetic gap.
Sorry about my ramblings, HIHI
Perhaps if the inductance, as measured with a bridge measuring device, shows
to be quite high for the chokes physical size, this
Jim: you can download the file from the following:
www.vintage-radio.info/heathkit/
I found this site with a google search after checking my manual file. Van
- Original Message -
From: Jim Wilhite [EMAIL PROTECTED]
To: amradio@mailman.qth.net
Sent: Saturday, December 08, 2007 2:24
John, as far I know Astatic has not manufactured them in several years.
There are though some fellas who have replaced the 104 crystal or
ceramic element with a wide variety of elements ranging for Radio Shack,
those supplies by Mouser Electronics, and Heil microphone HC-4/5
elements with
John...The Mouser element is really pretty bad audio quality but what
can you expect for a buck. The Heil D104
Replacement element for the D104 sounds really good.. go to
www.heilsound.com and go to the amateur page and you will find it...
Bob W1PE
-Original Message-
From: [EMAIL
John if you want originality, then contact Astatic. They had a mail in
deal for about 40 bucks which included return postage sometime back. I
had them do one of mine.
Don't have the web site at my fingertips but you can search for them and
look for the contact' page. Email them and they
John Coleman wrote:
Does anyone know if someone is making and selling the cartridges for the
D104.
I thought we went thought all that, a few years ago, and Otis bought a
few (several?) Crystal Element cartridges.
Does he have any left? Time to go visit the Ancient One, anyway...
--
Geoff,
Yep, we did go through that a few years ago at length, but it seems
there are some 'new' to D-104 crystal element replacement ham radio
fraternity members joining in such queries to our aging AM affectionatos
with patient answers and suggestions. Don't know about Otis. Would not
I don't think anyone is making exact replacements for the D 104.
The orignal element is very large so I don't think anyone wants to tool up
for it.
Kobetone makes a hi z crystal cartridge that will work ok in a D 104 head.
It's small enough to fit into the Turner Centurion Head type mics too.
Robert Lawson wrote:
Geoff,
Yep, we did go through that a few years ago at length,
When I said we, I was referring to John/BXO and I (as in replying to
his message). John, Otis, and someone else, forget now who it was...
Steve/K5LTK, perhaps, ordered some D-104 cartridges. In fact, I
And as usual, we hams have always come up with a back channel / back
door of ways to make things work cheaper and as good at least and often
times better. It's the spirit of our fraternity from our beginning,
isn't it. I personally hated it when Astatic pulled the D-104 crystal
element plug
16 matches
Mail list logo
