100 feet for a long-wire is not long compared to the wavelength
at 60[kHz], which is appr. 5000[m] or appr. 16000 feet. So,
the length of the antenna is appr. 1/160th of the wavelength -
an indication, that it will not develop much voltage at this
frequency. Maybe testing a magnetic antenna - lik
with a german ham?
I have regular experience in doing business with the United States
(as i'm the boss of a company that frequently purchases goods from
there), so the payment procedure and the else should not be a major
problem.
Thanks in advance for your answer.
Kind regards and vy73 from
May i add a few last words to this topic "miracoleous inven-
tions (antennas) and the follow ups" i forgot in my letter
before:
The design of the Drakes (i name the "4-line", to be honest,
as i never have seen a "7" or it's successors in technical
(schematic) detail) is straightforward and simpl
I think, the best thing to treat unbelievable inventions is
to judge them with common sense. And then it easily would
appear, that the laws of physics apply even in today's modern
times (o.k., Einstein changed some views of the Newton based
physics theory, but the general concepts - like waveleng
One small comment from my side:
As the article notes, the "...antenna melted while increasing
power up to 100 watts". To melt something, there is a need
for substantial power to do so, or in other words: power dissi-
pation in the antenna. This stands in clear contrast to the
other statement
5[MHz] or the 50[kHz] IF of the Drake
gear, that we all love...anyone interested in the results
sooner or later?
vy73 de DG7MCC, Herbert Schulz
Greg Putrich schrieb:
I believe you're correct. According to some searching,
IBOC was rolled
out to a handful of markets, including Chicago.
Her
e audio quality
will
for sure surprise anybody. Those transmissions could be easily
identi-
fied, because they have sharp bandwith limits: 10[kHz] (+/-5[kHz]
at
shortwave and 9[kHz] (+/-4.5[kHz]) at medium wave (AM) and long
wave.
vy73 de DG7MCC, Herbert Schulz
DAN COTSIRILOS schrieb:
Has
ter drive circuit to actually measure the AGC
> voltage itself. Another consideration was to also add a PIC
> microcontroller to not only measure the voltage but also correct
it
> and drive the meter movement and calibrate the thing.
>
> rob - K2CU
>
>
> >Herbert Schulz <
Richard,
in case you can and will disassemble the front panel totally
from the rest of the chassis that way, that you have the single
front panel and the knobs available as single part, my experience
is:
Clean it with a stiff-bristled handbrush in warm to hot water
with lot's of soap and lot's of
Months ago, i have read in a publication, that "S9" in the US
corresponds to 50[µV] into 50[Ohms] and that one S-unit is
5[dB]. In Europe, "S9" is equal to 100[µV] into 50[Ohms]
and
one S-unit corresponds to 6[dB]. I have to double check, if my
remembrance according this article is right, but i t
y knowledge) are running up-to-date virus-checkers.
Thanks for your patience and understanding in reading this lines.
Kind regards and vy73
Herbert Schulz, DG7MCC
y knowledge) are running up-to-date virus-checkers.
Thanks for your patience and understanding in reading this lines.
Kind regards and vy73
Herbert Schulz, DG7MCC
Peter,
i do not own a R-4A, but i may have some practical comments:
1.) A large ripple voltage combined with excessive trans-
former heating may also point to an overload
condition,
not necessarly may it only be one or more failed
cap's.
So, before doing any repair, i would suggest
to
Hello to all of the list,
the following text is a little bit longer then usual and therefore
it may be some lines to read, but as i had some requests to hold
my FS-4 related comments public rather that private, i will do
so.
For the readers that are uninterested in the one or other topic,
i
apolo
other classic Drake rigs. Over the years, these wafer switches build
up
oxidation which interferes with the switch's operation. Before I would
try
any advanced diagnostic/repair techniques as offered by Herbert Schulz,
I
suggest you clean the wafer switches with DeXoit and see if this clea
0 (MET)
Betreff:
Re: [drakelist] FS-4
Datum:
Wed, 10 Mar 2004 22:26:49 +0100
Von:
Herbert Schulz <[EMAIL PROTECTED]>
An:
DAN COTSIRILOS <[EMAIL PROTECTED]>
Referenzen:
1
Dan,
for first, there is
cking"-mechanism (it appears,
as this mailserver is thinking that i'm sending spam,
which is not the case).
Thanks for your efforts.
Kind regards and 73
Herbert Schulz, DG7MCC
y cost-of-goods.
The planned timeline for the availability of all results in-
cluding bare printed-circuit-boards and documentation will
be appr. 6 months from now on.
So, if anyone is interested in also duplicating this stuff
or in any other participation, please let me know.
Kind regards and vy73
Herbert Schulz
DG7MCC
Hi all,
i may have a silly question, but even reading the manuals
carefully several times, i have not been able to find out
what i'm asking for now:
I'm owning an R4-C and an SPR-4 as well. Both appear to have
exactly the same frequency scheme up to the 1st IF-frequency
(PTO tuning range 4955[kHz
Hi all,
i may have a silly question, but even reading the manuals
carefully several times, i have not been able to find out
what i'm asking for now:
I'm owning an R4-C and an SPR-4 as well. Both appear to have
exactly the same frequency scheme up to the 1st IF-frequency
(PTO tuning range 4955[kHz
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