Anyone out there have a well constructed home brew AM transmitter that is
laying around collecting dust? I am looking for one that runs 350-1000W out
and can be fully integrated or one that uses a driver for the RF and
modulator. If you have one that you would be willing to part with, give me
Bob Maser wrote:
Anyone out there have a well constructed home brew AM transmitter that
is laying around collecting dust? I am looking for one that runs
350-1000W out and can be fully integrated or one that uses a driver
for the RF and modulator. If you have one that you would be willing
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of W5OMR/Geoff
Sent: Tuesday, March 28, 2006 11:44 AM
To: Discussion of AM Radio
Subject: Re: [AMRadio] Home Brew AM Transmitter Wanted
Bob Maser wrote:
Anyone out there have a well constructed home brew
,
Jim Candela
WD5JKO
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Patrick Jankowiak
Sent: Monday, October 04, 2004 7:32 PM
To: amradio@mailman.qth.net; [EMAIL PROTECTED]
Subject: Re: [AMRadio] Home brew AM
I would say that the fidelity was pretty good
Message -
From: John Coleman, ARS WA5BXO [EMAIL PROTECTED]
To: 'Discussion of AM Radio' amradio@mailman.qth.net
Sent: Sunday, October 03, 2004 12:37 PM
Subject: RE: [AMRadio] Home brew AM Cathode modualtion
The Rice neutralization circuit works better with a higher Q
grid tank and, if possible
How does that compare to the performance of say the 250TH final
stage in a BC-610?
It sounds like you are running at lower power.
Also how many tubes do you use in the cathode modulator?
On 2 Oct 2004 at 20:12, Patrick Jankowiak wrote:
Cathode mod works very well on a 250TH. We are getting
The 450th is a big triode, so I dont think you can run it single ended pie
net output, you would need to do 2 250th tubes in push pull or something,
but the 450th would do the cathode modulator quite well.
You could use a single-ended pi-network type output circuit, with a balanced
grid
eventually went to standard Push
Pull.
John, WA5BXO
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Donald Chester
Sent: Sunday, October 03, 2004 12:45 PM
To: amradio@mailman.qth.net
Subject: RE: [AMRadio] Home brew AM Cathode modualtion
The 450th is a big
To: 'Discussion of AM Radio'
Subject: RE: [AMRadio] Home brew AM
Clay,
Sounds like a cool idea, and I always thought it should work well
since there is no mod iron.
I would go for a lower output using lower voltage though, with different
tubes.
4500 volts is a lot to expect a filament transformer
My two cent worth for the new guys that might not understand:
The technique that is used in the drawing of Jim's (JKO) showed
a 6146 in the final. This circuit is simply a class A audio circuit
that has been placed in series with the finals B+ and screen common
circuit. In this case the
Cathode mod works very well on a 250TH. We are getting 80-90
watts carrier no problem at 2200V. For the details:
http://www.montagar.com/~patj/cathmod01.htm
Patrick
a lower voltage but is good for some power...
Brett
N2DTS
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Clay W7CE
Sent: Thursday, September 30, 2004 12:52 PM
To: Discussion of AM Radio
Subject: Re: [AMRadio] Home brew AM
One option that isn't
with large tubes.
Brett
N2DTS
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of GGLL
Sent: Wednesday, September 29, 2004 7:55 PM
To: Discussion of AM Radio
Subject: Re: [AMRadio] Home brew AM
Hello people, I agree with the nice look and smell of glass AM. Few
Fall Hamfest at the Collins Radio Center, throughout the month of 2004
Liquidation of Heavy iron, test equipment, large variables, 1KW coils with
butterfly capacitors, large transmitting tubes, too many items to list.
No shipping.
No reasonable offer refused. If you plan on stopping by to
: Thursday, September 30, 2004 9:03 AM
Subject: RE: [AMRadio] Home brew AM
That would be hard, but not impossible.
You would need to read up on mod transformer construction,
find something to use as a core, and wind loads of wire on it,
keeping in mind the very high voltages that it would have
David where are you located??
David Knepper wrote:
Fall Hamfest at the Collins Radio Center, throughout the month of 2004
Liquidation of Heavy iron, test equipment, large variables, 1KW coils with
butterfly capacitors, large transmitting tubes, too many items to list.
No shipping.
No
]
To: Discussion of AM Radio amradio@mailman.qth.net
Sent: Thursday, September 30, 2004 4:03 PM
Subject: Re: [AMRadio] Home brew AM
David where are you located??
David Knepper wrote:
Fall Hamfest at the Collins Radio Center, throughout the month of 2004
Liquidation of Heavy iron, test
Thanks for the replies.
The 812/811 combo was sorta what I had in mind.
Getting the components shouldn't be too hard if I keep searching.
Let me start here...anyone have any suitable parts?
About the E class...read a few things about it...sounds most interesting...but
MOSFETS don't have the
likely, and
MIGHT be able to get you a mod transformer.
Brett
N2DTS
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Wednesday, September 29, 2004 9:52 AM
To: amradio@mailman.qth.net
Subject: [AMRadio] Home brew AM
Thanks
, 2004 9:52 AM
To: amradio@mailman.qth.net
Subject: [AMRadio] Home brew AM
Thanks for the replies.
The 812/811 combo was sorta what I had in mind.
Getting the components shouldn't be too hard if I keep searching.
Let me start here...anyone have any suitable parts?
About the E class...read a few
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