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Val, Did you get any responses to your request for help? I don't see any posted in the forum.

A new chat has been created: Hi Michael My e-mail to your t-online address bounces back. Tried a few times. Please advise. thanks Dieter, VK3FFB *By:* Dieter VK3FFB (group owner)

Dear FA-VA5 users, We may not be the most active group, but we meet the purpose of this group. Questions coming in from time to time are answered and discussed promptly. It is now my pleasure to

If we consider the following: The FA-VA5 measures impedance (Z) in a novel way devised by Michael, DG5MK. It then derives the VSWR via the reflection coefficient magnitude |rho| VSWR = ( 1 + |rho| )

Thats my point. If you want to do a reliable vector smith chart analysis with the VA5, the self made calibration kit may be the bottleneck, even below 100MHz. But not for the SWR

No rush, Peer. Take your time. Jan already sent one pic. SWR is a scalar number. (It is by definition the ratio of two voltage magnitudes |Vmax|/|Vmin| on a transmission line.) 73 Dieter, VK3FFB

Hi Dieter, Currently I'm on holiday. I will send the pictures as soon as I'm back home. For the SOL topic up to 100Mhz,? youre right. A bit polemic :) On the other hand, in my setup Im not using

Dieter VK3FFB (group owner) <dpelz@...> added the album FA-VA5 BNC connector soldering ( /g/fa-va5-users/album?id=281762 ) : This image was sent by Jan (SDR-KITS) to

Peer Glad to hear you found the problem. For the benefit of other FA-VA5 owners, it would be helpful if you could provide images of the BNC connector ground solder points. Page 7 (... BNC socket)

I'll remember that in the future.

For quick readers, the solution is down below! Hi Dieter, Wes, don't get me wrong. I highly appreciate tips and tricks for all kind of things. But, speculating and explaining basics isn't that

In the meanwhile Jan send me the data via Email. Many thanks for your support, Jan! And, to keep it straight for readers, the Amphenol BNC CAL Kit sold via box73 and sdr-kits requires -41,66ps for

Hello Peer I think Wes has already commented on the matter very well, so I am not going to repeat here. The SWR detection inside amateur radio transceivers is not using an impedance measurement

Hi Wes, For that measurement shown in the pictues I simply swapped the connector between the Icom and the VA5. In general I would agree that the Icom SWR Bridge will be a bit behind the accuracy of

Hi Peer, As I see it you have two different issues. 1) Disagreement between two different measuring devices 2) Some operational/calibration issues with the VA5. Issue 1.? I assume that you are

It can't hurt to try. I wish I had bought a cal kit when I purchased my FA-VA5, but most of my measurements are at HF, so I convinced myself that the basic 50 ohm load was good enough. Have you

Hi Wes, scalar SWR against scalar SWR. Should be the same, shouldn't it? The entire mess started when I tried to safe presets and the VA5 lost every setting and I had to do a factory reset.? If I

Hmm, the manual says for the Amphenol CAL Kit -41,66ps for S and -113,52ps for O. Now I'm a but confused. I mean I will try your values, perhaps they will solve my problem mentioned in the other

Peer, I think you mean that the indicated SWR is lowest at 7060 kHz.? That is not necessarily the resonant frequency (X=0). The FA-VA5 is probably giving you the correct answer.? How you are

Roger - in the interim, you could manually add SOL data. Should work ok for 30MHz and down as long as you aren't measuring xtal filters or anything exotic... Open delay: -99 ps Short delay: -284