Hello Gang;
I did some more work to help me understand more about this topic. I
decided
to take some capacitors from my junk box, and measure leakage currents
versus applied voltage, and then series up a pair to see how they behave.
First I had two Sprague D76588 47 Uf -
Wonderful site, those tubes glowing. Ceramic tubes just don't have
the charisma and solid state, what a laugh. But to hit the plate
switch and see the wattmeter go up to 10 KW or more is a real
charge.
I worked for KOMA in OKC back in the 60s when they had a WE 50 KW
water cooled transmitter. B
The voltage would divide according to the capacitance values (assuming 0
leakage in both caps). Using the formula C=Q/V, where C is capacitance
in Farads, Q is charge in Coulombs, and V is voltage (in volts, of
course!), Q necessarily has to be the same for both caps in a series
circuit once both a
I need 4 sockets for 813's..mucho trade items or ?
Thanks,
Bob, W4WSZ
[EMAIL PROTECTED]
I posted a request to a "repeater" group for help in tuning up a 440
repeater. I don't have a service monitor. I got a response from the
engineer for KFI here in Los Angeles! I took the repeater to the
transmitter site (location of the 750' tower in Los Angeles) and proceeded
to get a tour o
Joe,
I just spoke with John Fagan yesterday. Didn't know how wide his following
was. He is fine by the way. I was on the OU faculty for 14 years (at the
health sciences center in OKC), but John and I were the best of friends.
Ed, W9EJB
- Original Message -
From: "Joe & Judy Christia
I was going to reply to this earlier but, I tried to do it from
another email location which the AM Mailman did not know of so the
message was held up do to a technicality, HIHI
Any way it seems that Don, K4KYV has already replied but I will
just repost my message anyway.
The follo
I parted one out a couple of years ago. I don't care much for the way RCA
laid out their transmitters, although they used superbly built components.
The physical layout doesn't lend itself for conversion to higher
frequencies. They just seemed to place the components in the most
convenient s
Hi Kim, say hi to John Fagan for me! Look forward to hearing you on the
Globe Champ. I'm rebuilding my GK500B which I used as a kid and hope to
have it on sometime this year.
Joe Christian
K5HMD
At 11:59 AM 02/25/03 -0600, you wrote:
Hello to you all,
I'm a new list member and am delighte
Hey Dino Just keep in Mind that this transmitter will only work On 160 Meters
ok...
I have the smaller Version Of the BTA-1R1, the BTA-500R. 500 watts instead
of 1 kw. It does not take well to conversions to 80 or 40 meters great
sounding transmitter though..
Neal KA2CAF
Dino Darling wrote:
>
Wayne,
The other oddity of that period was of course the fused plugs that Heathkit,
Johnson and other manufacturers used.
Come to think of it, do you suppose the cord on that particular AT-1 is not
original? I forgot if you described the schematic as specifically not having a
fuse anywhere
Hi Tony,
Y'know, I don't currently have room for it in my shack, but I will one of
these days. If my kids decide not to pursue radio (they're 4 and 2 1/2
now, so there's still time to decide :) then I'll keep it along with the
Hammarlunds. If they decide radio is fun, then I hope that they'l
Hi Dino,
Nice try, but no cigar! :)
73,
Kim Elmore, N5OP
At 01:51 PM 2/25/2003 -0800, you wrote:
Yep, it sounds like the Globe is broken! You need to sell it to me ASAP! :-)
At 11:59 AM 02/25/2003 -0600, you wrote:
Hello to you all,
I'm a new list member and am delighted to find such a re
Thanks, Don!
The Globe uses 2 Amperex AX9909/6083 pentodes in parallel for the PA. These
tubes use indirectly heated cathodes. I have no idea how many hours are on
them, but I know that Dad has a replacement pair. However, I think that
indirectly heated cathodes had longer lifetimes than dire
Mark
The AT-1 manual says 450v, however mine runs about 460v. So , yes you are
right, the series combo has a rating of 700v which is substantially more
than what it sees.
As I mentioned earlier, the AT-1 has no fuse (mine will soon have one ). My
AT-1 was a $5.00 flea market item which came withou
I would LOVE to have something like this! I did a search and came across
this site...
http://home.stny.rr.com/n2bc/AMRadio.htm
I have someone in Washington who can pick this up for my I"M PRETTY
SURE. If nobody else claims it, I would sure like to have it! You didn't
mention a price, so th
At 01:51 PM 2/25/2003 -0800, you wrote:
Yep, it sounds like the Globe is broken! You need to sell it to me ASAP! :-)
NOPE I have been looking for one for a number of years to replace my org
station hi.. so he needs to trade it too me for a new HF rig when he no
longer wants it
LOL
73 Tony
wa
Wayne,
Thanks for kicking the stool right out from under me. HI!
Say, what is the voltage across that series string capacitor?
I bet it is nowhere close to the summed rated W.V. of the caps.
73
de KA4JVY
Mark
--- Sara & Wayne Steiner <[EMAIL PROTECTED]> wrote:
> Mark
>
> To
Mark
To answer your question about commercial gear and no equalizing caps, take a
look at the schematic of the little Heathkit AT-1 xmtr from the 50s. I Just
happen to be renovating one this week and the first section of the cap
input filter (two 8 mfd/350v in series) has no equalization. The lit
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