"phil " wrote:

hi Eric:

Oh, I don't argue *that*, I just argue that it wasn't resonant.

if you knew that then why use this antenna for LW?


Sigh... round and round we go... because it was very effective for my
needs, specifically picking up NDBs east of the site. Which it did
very well.

Not that it matters, really, my WR-G303i reports its signal strength
as 30 mV 120 miles away on a 400 foot wire broadside to the antenna.
Flamethrower, indeed.

30mV at what frequency? can you fault the R8B and R75 for overloading?

....what are you, totally thick or what? The MW station that was
causing the problems.

Dunno. I don't keep up with the local doings of the broadcasters
much. I assume they are in the old standard TV UHF band; 47 CFR 369
says that from 470 to 890 MHz, field strength on Table Mountain must
be less than 30 mV/m.

that PAR LPF should severely attenuate UHF. spectral analysis of that wire
is needed. low frequencies or potent RF energy can cause PIN diodes to
rectify.

The PAR LPF has no relevence to the federal regulations regarding
Table Mountain. What's your point? HDTV broadcasters at Lookout
Mountain are griping about the regs. My point, in case you missed it,
again, is that the flamethrower is in violation of the regs in 47 CFR
369.

No radio is perfect; the '7030 wouldn't hold up out there... To me
the question would be whether or not the '340 would.

the 7030 uses an SD5400 first mixer and has 40 dB of attenuation on tap...
add a $50 homebrew LW BPF: your RX340 will overload first. either way an
R75 hooked to a LW loop will hear more NDBs.

Of course. The R75 solves all. Can't imagine that if you use your LW
loop with another radio, that it'll outperform that R75, can you?
Come on, this is really simple. Take whatever crutches you add to
your R75, apply them to nearly ANY other radio on the market, and
it'll leave your R75 in the dust. (Notably, your dream radio, the
Racal 6790, would be left in the dust as well. What's your affinity
to radios with crappy front-ends?)

Eric, you remind me of Captain Ahab, fighting that whale of an antenna,
Moby Dick. man versus nature, a classic... but the SOB already bit off your
leg. shake the obsession... build a LW loop.

Actually I'll probably purchase what Pete comes up with, since his
loop probably will have a low NF and resistance to overload. Just a
guess. We'll see.

regards,
phil

So, what's the deal with the R75 schematic on Yahoo? I've been trying
to retrieve it for a week and the server acts dead. Is Yahoo that lax
in running their servers?

--
Eric F. Richards,
"The most likely way for the world to be destroyed, most
experts agree, is by accident. That's where we come in;
we're computer professionals. We cause accidents."
- Nathaniel S. Borenstein

Eric F. Richards wrote:

[...]
Dunno. I don't keep up with the local doings of the broadcasters
much. I assume they are in the old standard TV UHF band; 47 CFR 369
says that from 470 to 890 MHz, field strength on Table Mountain must
be less than 30 mV/m.

that PAR LPF should severely attenuate UHF. spectral analysis of that wire
is needed. low frequencies or potent RF energy can cause PIN diodes to
rectify.

The PAR LPF has no relevence to the federal regulations regarding
Table Mountain. What's your point? HDTV broadcasters at Lookout
Mountain are griping about the regs. My point, in case you missed it,
again, is that the flamethrower is in violation of the regs in 47 CFR
369.


Ack! phil completely drives me to distraction. The above two entries
should read 47 CFR 22.369 Part 22, 369.

I should've kept my R75 and put a "Hello, my name is phil" tag on it
so I could give it a good kick every time he posts more pro-R75
drivel...

I should've kept my R75 and put a "Hello, my name is phil" tag on it
so I could give it a good kick every time he posts more pro-R75
drivel...

pandering Captain Ahab? when Moby Dick overloaded an R8B and R75 you just
blamed the radios: "Get a real radio, and notice the difference. And if you
can't afford a real radio, get a Drake." so Steve, Les, Ken, me, and others
told you to stick it. instead of building a LW loop you went out and
"showed all us idiots" by buying a $4k radio LOL. what did you ask those
TenTec engineers Eric? directions to the bathroom? in the words of
President Bush: "THE GAME IS OVER"

regards,
phil

hi Eric:

...what are you, totally thick or what? The MW station that was
causing the problems.

at what *frequency* is that MW station transmitting?

Of course. The R75 solves all. Can't imagine that if you use your LW
loop with another radio, that it'll outperform that R75, can you?
Come on, this is really simple. Take whatever crutches you add to
your R75, apply them to nearly ANY other radio on the market, and
it'll leave your R75 in the dust. (Notably, your dream radio, the
Racal 6790, would be left in the dust as well. What's your affinity
to radios with crappy front-ends?)

the R75 was used to drive home a point: ANY tabletop using the LW loop i
suggested will outperform your antenna. only you cannot admit you were
wrong. thinking is a crutch! rip on the 7030 and Racal all you want genius.
who could not figure out that a simple $50 homebrew LW BPF in front of
either will smoke your $4000 RX340 in terms of IP3, dynamic range, phase
noise, ultimate rejection, etc. explain how your radio will leave any
tabletop "in the dust" when both are hooked to a LW loop? quote specs.

regards,
phil

"phil " wrote:

hi Eric:

...what are you, totally thick or what? The MW station that was
causing the problems.

at what *frequency* is that MW station transmitting?

670 kHz. KLTT. "The nations most powerful Christian voice." For
someone who keeps track of all the flaws in my past statements, you
should remember that one.

Of course. The R75 solves all. Can't imagine that if you use your LW
loop with another radio, that it'll outperform that R75, can you?
Come on, this is really simple. Take whatever crutches you add to
your R75, apply them to nearly ANY other radio on the market, and
it'll leave your R75 in the dust. (Notably, your dream radio, the
Racal 6790, would be left in the dust as well. What's your affinity
to radios with crappy front-ends?)

the R75 was used to drive home a point: ANY tabletop using the LW loop i
suggested will outperform your antenna.

We'll see. I have no argument with using an LW loop, only with using
the R75.

only you cannot admit you were
wrong. thinking is a crutch! rip on the 7030 and Racal all you want genius.

Thank you, I think I will.

who could not figure out that a simple $50 homebrew LW BPF in front of
either will smoke your $4000 RX340 in terms of IP3, dynamic range, phase
noise, ultimate rejection, etc. explain how your radio will leave any
tabletop "in the dust" when both are hooked to a LW loop? quote specs.

Tell me, phil, what's the hyping on the price of the '340? The
half-octave BPFs in the front end were only one reason I got it. Most
of the reasons I bought it were based on operating it and getting a
feel for how capable it was. Specs? You can look them up yourself.
I'm not a walking calculator. We can argue about 1, 3, 10 or 20 dB of
dynamic range for close-in spacing, but that isn't the issue. You
know that.


regards,
phil

--
Eric F. Richards,
"Nature abhors a vacuum tube." -- J. R. Pierce, Bell Labs, c. 1940

hi Eric:

honestly i was trying to help. if you hook a large air-core air-cap [high-
Q] tuned loop to your RX340 you should be very happy with the results on
LW. you are correct, DR is not a big issue with this setup. if you hate the
R75 that is fine. one of the best out of the box units is the R8B. people
who say one cannot program listen or DX with the [insert tabletop name
here] are full of it. i've done experiments bearing this out. the tabletops
are more similar than they are different. buy whatever suits your fancy and
use the best antenna possible. i will call a spade a spade. the 7030 and
6790 have high IP3 mixers. AFA that 1000' antenna: 670-kHz is 3/4
wavelengths resonant at 1099'. radios are going to suffer from overload. i
suggest trying a series-resonant trap that: this should dump much of that
670-kHz energy to ground before it enters the radio.

regards,
phil

It should be good..............I am shooting for a +40dBm IP3 on the loop
amplifier. About that 6790, the IP3 on that unit is rated at +30dBm, which
isn't bad, but they do have a wide open front end. Still, I haven't had any
overload problems with mine. It is my favorite receiver, but it so is
BIGGGGGGGGGGGGGGG. Maybe, when I buy a house, I will build a nice deep night
table to keep it on. When you open up the 6790, you see that the
construction is very good. All of the RF modules are enclosed in a die-cast
"egg crate construction" style of assembly. The 45MHz I.F. filter is at
least 8 poles, so the 2nd mixer is protected quite well from out of bandpass
stations. I got mine from Ken G. down in St Louis. He is a great person to
deal with.

Pete

"Eric F. Richards" wrote in message
...
"phil " wrote:

hi Eric:

Oh, I don't argue *that*, I just argue that it wasn't resonant.

if you knew that then why use this antenna for LW?


Sigh... round and round we go... because it was very effective for my
needs, specifically picking up NDBs east of the site. Which it did
very well.

Not that it matters, really, my WR-G303i reports its signal strength
as 30 mV 120 miles away on a 400 foot wire broadside to the antenna.
Flamethrower, indeed.

30mV at what frequency? can you fault the R8B and R75 for overloading?

...what are you, totally thick or what? The MW station that was
causing the problems.

Dunno. I don't keep up with the local doings of the broadcasters
much. I assume they are in the old standard TV UHF band; 47 CFR 369
says that from 470 to 890 MHz, field strength on Table Mountain must
be less than 30 mV/m.

that PAR LPF should severely attenuate UHF. spectral analysis of that
wire
is needed. low frequencies or potent RF energy can cause PIN diodes to
rectify.

The PAR LPF has no relevence to the federal regulations regarding
Table Mountain. What's your point? HDTV broadcasters at Lookout
Mountain are griping about the regs. My point, in case you missed it,
again, is that the flamethrower is in violation of the regs in 47 CFR
369.

No radio is perfect; the '7030 wouldn't hold up out there... To me
the question would be whether or not the '340 would.

the 7030 uses an SD5400 first mixer and has 40 dB of attenuation on
tap...
add a $50 homebrew LW BPF: your RX340 will overload first. either way an
R75 hooked to a LW loop will hear more NDBs.

Of course. The R75 solves all. Can't imagine that if you use your LW
loop with another radio, that it'll outperform that R75, can you?
Come on, this is really simple. Take whatever crutches you add to
your R75, apply them to nearly ANY other radio on the market, and
it'll leave your R75 in the dust. (Notably, your dream radio, the
Racal 6790, would be left in the dust as well. What's your affinity
to radios with crappy front-ends?)

Eric, you remind me of Captain Ahab, fighting that whale of an antenna,
Moby Dick. man versus nature, a classic... but the SOB already bit off
your
leg. shake the obsession... build a LW loop.

Actually I'll probably purchase what Pete comes up with, since his
loop probably will have a low NF and resistance to overload. Just a
guess. We'll see.

regards,
phil

So, what's the deal with the R75 schematic on Yahoo? I've been trying
to retrieve it for a week and the server acts dead. Is Yahoo that lax
in running their servers?

--
Eric F. Richards,
"The most likely way for the world to be destroyed, most
experts agree, is by accident. That's where we come in;
we're computer professionals. We cause accidents."
- Nathaniel S. Borenstein

"Pete KE9OA" wrote:

It should be good..............I am shooting for a +40dBm IP3 on the loop
amplifier.

Cool!

About that 6790, the IP3 on that unit is rated at +30dBm, which
isn't bad, but they do have a wide open front end.

Yeah. I know it has a pretty solid front end, but no preselector.
I'm just returning the favor for phil needling me. The only real
problem with that receiver is that it generally is bare-bones when you
get it and you have to fill out all the filter options.

Eric

Still, I haven't had any
overload problems with mine. It is my favorite receiver, but it so is
BIGGGGGGGGGGGGGGG. Maybe, when I buy a house, I will build a nice deep night
table to keep it on. When you open up the 6790, you see that the
construction is very good. All of the RF modules are enclosed in a die-cast
"egg crate construction" style of assembly. The 45MHz I.F. filter is at
least 8 poles, so the 2nd mixer is protected quite well from out of bandpass
stations. I got mine from Ken G. down in St Louis. He is a great person to
deal with.

Pete


--
Eric F. Richards

"The weird part is that I can feel productive even when I'm doomed."
- Dilbert

I know that...............I think that both of you are good guys. Radio fun!

Pete

"Eric F. Richards" wrote in message
...
"Pete KE9OA" wrote:

It should be good..............I am shooting for a +40dBm IP3 on the
loop
amplifier.

Cool!

About that 6790, the IP3 on that unit is rated at +30dBm, which
isn't bad, but they do have a wide open front end.

Yeah. I know it has a pretty solid front end, but no preselector.
I'm just returning the favor for phil needling me. The only real
problem with that receiver is that it generally is bare-bones when you
get it and you have to fill out all the filter options.

Eric

Still, I haven't had any
overload problems with mine. It is my favorite receiver, but it so is
BIGGGGGGGGGGGGGGG. Maybe, when I buy a house, I will build a nice deep
night
table to keep it on. When you open up the 6790, you see that the
construction is very good. All of the RF modules are enclosed in a
die-cast
"egg crate construction" style of assembly. The 45MHz I.F. filter is at
least 8 poles, so the 2nd mixer is protected quite well from out of
bandpass
stations. I got mine from Ken G. down in St Louis. He is a great person
to
deal with.

Pete


--
Eric F. Richards

"The weird part is that I can feel productive even when I'm doomed."
- Dilbert

"Pete KE9OA" wrote:

I know that...............I think that both of you are good guys. Radio fun!

Pete


anyone else belive that?


(crickets chirping)

Hmpf. Thought so.

:-)

Thanks for the vote of confidence, Pete!

Eric

"Eric F. Richards" wrote in message
...
"Pete KE9OA" wrote:

It should be good..............I am shooting for a +40dBm IP3 on the
loop
amplifier.

Cool!

About that 6790, the IP3 on that unit is rated at +30dBm, which
isn't bad, but they do have a wide open front end.

Yeah. I know it has a pretty solid front end, but no preselector.
I'm just returning the favor for phil needling me. The only real
problem with that receiver is that it generally is bare-bones when you
get it and you have to fill out all the filter options.

Eric

Still, I haven't had any
overload problems with mine. It is my favorite receiver, but it so is
BIGGGGGGGGGGGGGGG. Maybe, when I buy a house, I will build a nice deep
night
table to keep it on. When you open up the 6790, you see that the
construction is very good. All of the RF modules are enclosed in a
die-cast
"egg crate construction" style of assembly. The 45MHz I.F. filter is at
least 8 poles, so the 2nd mixer is protected quite well from out of
bandpass
stations. I got mine from Ken G. down in St Louis. He is a great person
to
deal with.

Pete


--
Eric F. Richards

"The weird part is that I can feel productive even when I'm doomed."
- Dilbert


--
Eric F. Richards,
"Nature abhors a vacuum tube." -- J. R. Pierce, Bell Labs, c. 1940