I actually believe that its an OM's capability to respond quickly or type properly.   Some OMs are slower than others, or never learned to type.  "Two fingers were enough for code, why not for PSK31?"  Macros make up this short-coming, but result in a loss of operator congeniality.

73,

---* Ken

That's the response you gave to AC2RC about the DSP.  I'm talking about the 100-step noise blanker which is only sensitive and only operates on pulsed, periodic noise.  This does not interfere with CW or SSB received signals.

73,

---* Ken

Hold on.  I haven't heard any discussion about your use of the 100 step noise blanker o the 700.  That's not DSP. It's the separate noise blanker (NL) used to filter pulsed noise sources like ignition noise.

I am surprised that not one level of the 100 steps available in the 7000 does not dissipate the pulsed noise.

I agree.  The Radio Shack 1:1 works well. I use one for my homebrew digital mode interface for a Kenwood TS-480S

OK, let's get "our" facts straight. The Svetlana 572B has an extremely effective getting system using titanium, not barium.

The Svetlana 572B has a superior getter system based on titanium adhered to the external surface of the graphite anode. The titanium coating covers the entire anode area extended by the inherent surface roughness of graphite. Further, the titanium operates over the ENTIRE anode temperature gradient thus assuring absorption of a wide spectrum of gases.

Titanium has an index of gas absorption 6-10 times greater than barium. This getter system is far more effective in comparison to cost saving barium getters silvered on the inside surface of glass envelopes commonly used in 811A tubes. The Svetlana 572B envelope is fabricated from hard glass intended specifically for the high-temperature operation of transmitting tubes.

73,

---* Ken

"The following items is currently out of stock and has been removed from your order.

10-Digit Scientific Calculators | SKU 920246"

- Dollar Tree

73,

---* Ken

"MixW for digital modes may be used without TNC. The only requirements are a computer running Windows 9x, ME, NT4, 2000, XP or Vista operating system with compatible soundcard and one of the RigExpert USB interfaces."

from the MixW website

73,

---* Ken

I think the previous commentors are not so familiar with the software. MixW WILL work under VISTA.  Here are the requirements for your PC:

Computer - 486 CPU, 100 MHz minimum (Pentium 166 MHz or higher is recommended).
Soundcard - 16-bit Windows-compatible.
RAM - 16 MB or more.
HDD - at least 3.5 MB free space.
OS - Windows 9x, ME, NT4, 2000, XP.


My thought would be that your soundcard is not compatible.  If you are using an on-board sound device, check that it is 16-bit compatible.  If not, you'll need to get a PCI or IDE soundcard for the PC.

73,

---* Ken

=> http://www.globaltuners.com/receiver/info.php?r=109

Vero Beach, FL

73,

---* Ken

I guess my first question is "quantitative information" of on what quantity?

RF radiation...solar radiation, what?  If RF radiation, on what frequencies are you interested in having information.

For example, an experiment was performed in which a 30-foot maple tree was placed between a 2-foot parabolic antenna and a distant transmitting site operating at 20 and 44 GHz. The objective was to measure attenuation through foliage. Results indicate that attenuation is nearly the same at the two frequencies. A value of 4 dB/meter can be used as a rough guide for deciduous trees in full leaf. Measurements on single maple leaves and pine needle clusters plus a study of the literature tended to reinforce the conclusions of the tree experiment, and to show that evergreen trees can be expected to have similar attenuation values.

And of course, there is a reason that 800 MHz RF towers are NOT placed in pine forests.  Can you 'guess' why?  Typical pine needles are 1/4 wavelength resonators!

In contrast, it is well known that at HF through VHF, the propagation between two distant points within a forest experiences significantly LESS attenuation than that predicted by direct path field calculation. That is, the predicted attenuation of the direct wave far exceeds the attenuation values obtained from experimental results.

73,

---* Ken

This is what Part.303(f) says (beow).  Note, there is NO requirement for a phone emission ALONE to meet the A3E requirement in (2).  The only reference in (2) to phone emission is a MULTIPLEXED image and phone emission.

Depsite the prejudice against, FM-narrowband transmission is permissible on the HF bands.

73,

---* Ken

"(f) The following standards and limitations apply to transmissions on the frequencies specified in Sec. 97.305(c) of this part.
    (1) No angle-modulated emission may have a modulation index greater than 1 at the highest modulation frequency.
    (2) No non-phone emission shall exceed the bandwidth of a communications quality phone emission of the same modulation type. The total bandwidth of an independent sideband emission (having B as the
first symbol), or a multiplexed image and phone emission, shall not exceed that of a communications quality A3E emission."

If you are using 5x5, taking the exams on eHam and QRZ, and trying to understand transmission line behaviour and phase angle (reactance-resistance calculation), you'll do OK.

I used a calculator and did all soluitons from scratch, but most of the OMs I've talked to said they never used a calculator on the Extra.

73,

---* Ken

Yes..."just about exhange rate"...NOT!

I own a beautiful Begali I purhased when visiting Torino after talking with Piero and his daughter. The exchange rate was 1:1. Now its not, and you may never own one because of that echange rate.

So, it's "you" having a fantastic CW paddle or not.  Seems relevant...for you, not me.  I've got one!

73,

---* Ken

K7KBN is correct.  If a FCC-type accepted VHF Marine radio can be programmed to operate on Amateur bands, then an appropriately licensed ham-mariner can use it on both.

However, no Amateur band radio not FCC-typed accepted for marine operation can be used in the Marine bands.

Same goes for HF Marine radios.73,

---* Ken

 

Michael KU4UV,

Nope, this isn't the right forum.  The Computer forum is probably where you wanted to send this query. But, I can take a stab at an answer.

The interface you built probably includes both the Radio Shack isolation transformer and the audio output transformer.  The difference between them is the isolation transformer is just that.  It's a 1:1 transformer to isolate two I/O circuits that share a similar impendance. This is used between the line-out of the PC and the microphone of your rig (high-to-high I).  

The audio output transformer is an 8 ohm to 1000 ohm transformer that not only isolates the circuits, but steps up/down the impendance.  This type transformer is what you need to go from your rig's external speaker output to the line-in input of the PC (low to high I).

So, the 4-pin microphone would be added to the rig side of the isolation transformer. This will not even be a problem as long as you: (1) disconnect the microphone before moving to PSK31/VOX, and (2) disconnect the line-in to the PC when moving to voice.

73,

---* Ken