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Yes, there is a DC blocking capacitor at the input so you can put the Vdd to the SMA center pin using an appropriate inductor. Best to add a switch too

This is a SPF5189Z amp. Many are available on eBay but make sure you buy from a reputed seller and check the current drawn as there are many fake SPF5189Z components on eBay. Officially it should run

Note added, see: https://tinysa.org/wiki/pmwiki.php?n=Main.LNA

Herb, After a marker search should using the lever jump from maximum to maximum or just move the marker to any position? Or should this depend on what previous action was done (e.g. left/right marker

I am impressed. However to make it a bit easier, is it possible to put the vcc direct to the ?tinysa ?input sma (assuming there is a blocking capacitor) so that it is similar to a bias tee ( is

Thank you Larry.? That was exactly the problem.? My thinking was backwards from ST's.? The first time I used the utility, I mistakenly used "upload".? Once I refreshed the .dfu file from Erik's

Brent, Make sure you are pushing the FW _to_ the device and not reading the device.? There are two functions of DfuSe. Make sure you click on the UPGRADE button, not the Upload, which reads the

I just received mine today and ordered directly from Maggie on 07/24 via messaging using the Contact link for the store (

Something did go wrong with your FW update as the version should read v0.1-59.

In a couple of weeks there will be a large batch available on Amazon

Waiting for Amazon to get them .?? They have a lot of NanoVNA at reducing prices.?? Is there a good source from China or elsewhere with fast shipping?? Hunting for some QRM.

I'm clearly missing something.? I used the update files pointed to in this thread with the DfuSE Demo (V3.0.6) and all _seemed_ to go well, erasing, writing and verifying, but after a power cycle

Thank you. -- El software de antivirus Avast ha analizado este correo electrónico en busca de virus. https://www.avast.com/antivirus

Could you link to your source of the amp? Thanks, Roy WA0YMH

HI Erik, Great! ?Would be a good idea to list the maximum current draw of the VDD pin right there on the LNA page. ?Certain amps are hungrier than others and I'm not sure offhand how much you can

There may be a newer version, but it is not uploaded to the link above. The currently available version is 1.0.7528.21513

For those that want to do QRM hunting, having a LNA with the tinySA would be nice. This can be easily done in about 10 minutes. More detail here: https://tinysa.org/wiki/pmwiki.php?n=Main.LNA Result:

Erik, Just updated to v1.0-59.? Internal attenuation issue is resolved.? Still having issue with problem 1 as follows: Turn on marker 2? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

Thanks for the guidance. Got the Firmware updated and it still works. Major accomplishment for the day. 73, Dick, W1KSZ ________________________________ Sent: Monday, August 24, 2020 9:04 AM To:

Yes