A little simulation here, showing what happens to a power
supply's output from near zero to a bit of overload, to focus on
the area where the bleeder or load current becomes high enough
to meet with the 'critical inductance' value of the choke at
hand. It makes a good case for a stout bleed. I
Hello-
I received a letter from an un-identified company in my area { Alvin, TX}
titled a Feasibility Survey, regarding my interest { as a rural potential
customer } in high speed broadband internet service. They describe the service
as a small antenna at my house and a broadcast tower a
Sure it is. Companies looking to enter a marketplace area with a new type
of product often send out feasibility surveys. There are companies you
can hire that put together the surveys, mail them out, and track their
returns. Their ploy is that they're asking for your time to fill out the
survey,
Hi Brett,
Would your friend with the full garage be interested in selling a mod
transformer? I've been slowly gathering parts for an 2-813 by 2-813
transmitter and would be interested if he is.
Thanks,
Larry
Brett gazdzinski wrote:
A very good choice!
Build it right, and it works like a
Ooops, sorry, didnt mean to send this to the list, but since I did,
havnt heard from Brett yet of course but I'm in the market for a good
mod xformer for a 4x 813 transmitter if anyone has one available they'ed
like to sell.
thanks,
Larry
Larry Roohr wrote:
Hi Brett,
Would your friend
Larry,
Maybe, I would have to ask.
He and a friend bought a truck load of RCA iron, and its stored in his
garage.
I am not sure who has what iron left to sell, but I know he wants it out
of his garage.
It would be pick up only in South Jersey.
Price is around $200.00 I would guess, these are NEW
I have been trying for two days to pause the mail for a few days through
mailman.qth.net
It will not authoirize me to get in, I have only used three passwords in my
entire internet life and none of them work. When I ask to have the
password mailed to me it never comes. I cant have the email
Brett,
If your friend needs to move some of the iron out, I'd be happy to buy a
mod transformer. I'm located in Cherry Hill.
Thanks and 73,
Ed N3CMI
Brett gazdzinski
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 to withstand.
You can buy mod transformers, peter dahl makes new ones, ebay,
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
One option that isn't discussed often because it is considered inefficient
at high power is series cathode modulation. This is accomplished by putting
the modulator tube between the RF amplifier tube's cathode and ground. The
only apparent inefficiency is that you run the RF amp at one fourth of
I figured lots of people would ask...
I don't know how many mod transformers they have left to sell,
if any.
Loads of big 220 to high voltage power transformers, no 110 to high voltage
transformers left last time I checked.
I will call and see what is up...
Brett
N2DTS
-Original
Correction:
The month of October before the snows of winter begin here in west-central
PA!
Dave, W3ST
Publisher of the Collins Journal
Secretary to the Collins Radio Association
www.collinsra.com
Nets: 3805 Khz, Monday/Wednesdays 8 PM EDST
14250 Khz Saturday, 12 Noon EDST
-
From Brad KB7FQR
I could not tell who has the BTA 500 1R1 etc, I am intrested to chat with
you. I am an tube collector who has been out of the hobby for years and have
gotten back in with both feet. I have a Johnson 500 and want to build a
4-1000 amp or other. My motto is NO GLOW NO GO I am in the
Thanks for checking, Brett. I'll take a mod transformer and possibly a 220
to HV plate transformer too.
73,
Ed N3CMI
Brett gazdzinski
Hello Brad.
I think your Looking to talk with Me
I also collect old FM broadcast transmitters...
Neal Newman-KA2CAF
CE/CO
WTTM,WYGG,WUPC,W220AA
http://www.angelfire.com/nj4/wttm
UVC wrote:
From Brad KB7FQR
I could not tell who has the BTA 500 1R1 etc, I am intrested to chat with
you. I
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
the BC250L's grid/driver plate
coil is NOT on a bakelite form. It is a ceramic one, 2 1/2 inches in
diameter.
I still get the exact same grid drive on 160 meters as I did on the
broadcast
band. My problem still remains efficiency, and maybe I'll just have to
settle
with 61% and be happy.
What are the big transmitters going for these days?
Thanks all,
Cory/AD5QP
__
Do you Yahoo!?
Yahoo! Mail - Helps protect you from nasty viruses.
http://promotions.yahoo.com/new_mail
A few miles east of Johnstown, PA
Dave, W3ST
Publisher of the Collins Journal
Secretary to the Collins Radio Association
www.collinsra.com
Nets: 3805 Khz, Monday/Wednesdays 8 PM EDST
14250 Khz Saturday, 12 Noon EDST
- Original Message -
From: Neal Newman [EMAIL PROTECTED]
To:
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