Help needed with calibration
Hi and thanks for including me in the group. I recently bought a FA-VA5 analyser 99% built with the standard 100Mhz calibration plugs and all went well in the assembly phase. However, when I came to
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Lawrence G4GZG
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#209
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Re: #fa-va5 Power output
#fa-va5
Thanks all. It's an interesting little meter for the price. I think it's in the ballpark with a 30 dB attenuator at least for HF QRP measurements...
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va3rr
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#208
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Re: #fa-va5 Power output
#fa-va5
There is no calibration on the FA-VA 5 output power. The output power also depends on the selected frequency. For an antenna analyzer (or network analyzer) this is not a problem as any level of output
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Michael DG5MK FA-VA5 creator
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#207
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Re: #fa-va5 Power output
#fa-va5
It seems this device is built around the Analog Devices AD8307. Assuming this is a genuine AD product, I'd just go with the values from the datasheet, rather than use FA-VA5 as a calibrated source. Of
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Magne LA1WUA
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#206
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Re: #fa-va5 Power output
#fa-va5
I suspect the Power is calibrated for a sine wabe Square wave will be way off. -- VY 73, Wes AE6ZM
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Wes WB7BR
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#205
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#fa-va5 Power output
#fa-va5
Can anyone tell me if the 5.6 dBm square wave output of my FA-VA5 is a reasonable accurate signal level for calibrating my Aliexpress power meter? K5BCQ had mentioned in another group.io forum that he
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va3rr
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#204
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Re: 2022 membercount reaches 166
Thinking about "condensed pages on certain critical aspects of FA-VA5 usage", it would probably be good to hear about those initial difficulties encountered by new FA-VA5 users. We already know for
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Dieter VK3FFB
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#203
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Buy in Canada
Thank you John. I'll look at those as well. Dave VE1VQ/VA6NS
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Dave VE1VQ <ve1vq@...>
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#202
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Buy in Canada
Thanks Dieter, Appreciate the information. Dave VE1VQ/VA6NS
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Dave VE1VQ <ve1vq@...>
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#201
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Re: Buy in Canada
I bought mine from sdr kits as well Get the case and extra calibrated elements -- John VE3IPS
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John
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#200
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Re: Buy in Canada
Hi Dave, I would refer to SDR-Kits in the UK. I bought mine from them. https://www.sdr-kits.net/VA5-Antenna-Analyzer-Kit 73 Dieter, VK3FFB
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Dieter VK3FFB
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#199
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Buy in Canada
Is there a source or sources for the FA-VA5 in Canada? If not, where would be supplier and a website with information to order for shipping to Canada? VE1VQ/VA6NS
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Dave VE1VQ <ve1vq@...>
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#198
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Re: Checking the calibration process over time.
#fa-va5
Thanks Mel.
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Dieter VK3FFB
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#197
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Re: Checking the calibration process over time.
#fa-va5
Here is a finished one. Mel, K6KBE
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Mel K6KBE
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#196
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Re: Checking the calibration process over time.
#fa-va5
Here is one in process. Mel, K6KBE
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Mel K6KBE
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#195
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Re: Checking the calibration process over time.
#fa-va5
Hi Mel, Good stuff. If you have a picture, please post. thanks & 73 Dieter, VK3FFB
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Dieter VK3FFB
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#194
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Re: 2022 membercount reaches 166
Fine work, Jacques. I'll convert it to pdf and upload in the "Files" section of our group. 73 Dieter, VK3FFB
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Dieter VK3FFB
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#193
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Re: 2022 membercount reaches 166
Hello All, Back in 2019 I did a presentation at the Boxboro convention which might be of interest.? I use my FA-VA5 to do many measurements. ¡§Get the Most from Your Antenna Analyzer¡§
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Jacques VE2AZX
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#192
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Checking the calibration process over time.
#fa-va5
One thing that happened to me with other antenna analyzers, is whether the calibration was accurate.? So I did a test, a simple one with a termination of 50 ohms and a reactive load at a standard
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Mel K6KBE
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#191
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Re: 2022 membercount reaches 166
Yes, please do. VA5 users are in the best position to improve existing "how-to" instructions. Initially, I did not understand the SWR sweep settings (< > M) and had to read the manual a 2nd time. I
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Dieter VK3FFB
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#190
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