After seeing one of these in action I decided it was a shack 'must-have' and bought one from eBay (such as https://www.ebay.co.uk/itm/Tiny-Spectru ... 2749.l2649). Its sold as covering 100kHz to 350MHz, 240MHz to 960MHz. \i've used it on 4,2 and 70 having set up 3 pre-sets.
Its turning out to be really handy for 'reality checks' and I have been able to set it up to do what I want without recourse to the manual. It has saveable pre-sets and although I can't vouch for its absolute accuracy, 'a picture paints a 1,000 words' and for a quick look at what you are transmitting, it has proved itself invaluable.
Its similar to a NanoVNA but about 2/3rds of the thickness. Mine came cased, with lipo battery, a small whip, 2 SMA leads and a USB-C charge lead.
Its been on for at least 2 hours today and still going strong.
Gareth
In praise of the TinySA
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This forum is run by the BATC (British Amateur Television Club), it is service made freely available to all interested parties, please do not abuse this privilege.
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Re: In praise of the TinySA
Could be very useful as a Rx monitor to see what's happening on the channel - would give an indication of rx signal strength, interference or other reasons why it's not locking!
Noel
Noel