Calibration Question
Hello all, I need some assistance with the calibration process as I am obviously doing it wrong. A 25 Ohm pure resistive load shows an SWR of 2.7 I have a set of open/short/ 50 Ohm calibration loads
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Hans VK4ANS
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#294
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Locked
USB cable for FA-VA5 operation via PC
It is perhaps time to highlight once more that many so-called USB cables that *seem to suit* the FA-VA5 are actually "charge-only" cables, meaning they cannot be used for connecting the FA-VA5 to a PC
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Dieter VK3FFB
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#293
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FA-VA5 measuring bandpass filter passband VSWR
I have often wondered whether my FA-VA5 can accurately measure a UHF (70cm band) bandpass filter I made recently. Well, I tried it out today and the answer is: yes, it can. While a filter is clearly a
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Dieter VK3FFB
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#292
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Re: Question on FA-VA4 software update
Hi, I just checked FA-VA4 with 0.40. It does not support 'scrolling' of frequency. I assume you mean frequency change in any sweep mode. The easier way to achieve band change is to move from sweep
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Michael DG5MK FA-VA5 creator
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#291
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Question on FA-VA4 software update
Hi, As a recent-joiner of this list, may I start by asking a question that is perhaps a little bit out of scope. I have a FA-VA5 and I'm very happy with it. I recently bought a second-hand FA-VA4 to
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Geert Jan PE1HZG
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#290
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Re: Erase Dataset Memory
Thank you Michael. I knew that would do it, but I was trying to avoid the recalibration, but it might be time for that anyway. Wonderful instrument. Regards,? Wes
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Wes N7WS
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#289
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Re: Erase Dataset Memory
Wes, selecting factory reset from the menu will delete the whole EEPROM content, including datasets. However, it also deletes master calibration. Therefore, a new master calibration should be the next
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Michael DG5MK FA-VA5 creator
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#288
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Erase Dataset Memory
Is there a way to erase (empty) the dataset memory locations.? I know they can be overwritten but it can get confusing.
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Wes N7WS
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#287
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Printing problem
A cordial greeting to all. I am a new user of FA-VA5 and VNWA software. I have a problem: when I print (File/Print) a green band always appears as in the image below. - What does this band mean? - Is
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Gianfranco
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#286
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Re: Measuring Coax Loss
Most welcome. Glad it worked out well.
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Dieter VK3FFB
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#285
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Re: Measuring Coax Loss
Dieter, Thank you for the reply and information. I have finished measuring the coaxial cable RL for receive side of my H/V 2m array. RL * 0.5 makes the results much better and all looks good now!
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Peter G4URT
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#284
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Re: Measuring Coax Loss
Hi Peter, sorry for the delay. For measuring cable loss, you can use RL (return loss). You disconnect the cable at the antenna side and *leave the cable unterminated*. The RL you measure is then twice
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Dieter VK3FFB
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#283
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Re: Measuring Coax Loss
Dieter,, Hi - my FA-VA5 kit working well after 3 years. In the past I have only used it for measuring SWR and it has been fine. I think that I now have problems with my coax feeds to my 4 * 9 2m H/V
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Peter G4URT
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#282
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Re: Measuring traps with the FA-VA5
Dieter, Thank you for the information, I will try your suggestions. The FA-VA5 is perfect for use at the work bench. I will try it and see how it goes! 73' Matt - WA0V
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Matt WA0V
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#281
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Measuring traps with the FA-VA5
Hi Matt Sounds good. Here is some advice regarding the measurement of traps. I have used this method successfully when I made a trapped dipole for 18 and 14 MHz. When measuring a trap, we have to
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Dieter VK3FFB
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#280
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Re: Measuring coils with the FA-VA5 LCR mode
Dieter, Thank you, that was the conclusion that I came to as well. I'm making traps for the OZ1CX version of the W3DZZ 5-band dipole. https://www.dxing.eu/images/projects/W3DZZ/w3dzz-oz1cx.jpg Using
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Matt WA0V
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#279
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Edited
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Re: Measuring coils with the FA-VA5 LCR mode
Hi Matt, It is advisable to measure the coil at its operational frequency of 7 MHz. We never get pure coils. First and foremost there is a winding capacitance does affect the effective inductance. If
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Dieter VK3FFB
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#278
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Re: Measuring coils with the FA-VA5 LCR mode
Hi Dieter, When designing a coil for a 40m trap, would it be advisable to set the frequency to 7MHz? Or would it be better near 1MHz for instance? Thanks! 73' Matt -WA0V
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Matt WA0V
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#277
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Re: Sweep generator - New feature
Hi Johnny, thanks for your suggestion. Unfortunately the EEPROM in the FA-VA 5 is filled to 99 %. There is no space left for any new features. Also, there are no plans to issue a new firmware for the
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Michael DG5MK FA-VA5 creator
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#276
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FA-VA5 review
I own the FA-VA5 from 4 years, this is my review and description: https://www.pianetaradio.it/blog/antenna-analyzer-fa-va5/
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Johnny IZ8EWD
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#275
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