Duck Duck Go is your friend. Search for '"airspy hf+"
capacitor fix' without the single quotes. About the fourth
citation is a groups.io posting with what you want.
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On 20211221 03:03:36, David J Taylor
via groups.io wrote:
21/12/2021 00:21, Max wrote:
Big surprise trawling around NDBs, CHT
Chiltern CW ident audible with total clarity (admittedly only
couple dB off noise level) on Hermes Lite 2. Just detectable but
only intermittently readable with difficulty on HF+. I guess
that just confirms what a superb receiver the Hermes Lite is (as
I actually already suspected). Bit disappointed in the HF+.
Expected it to significantly better the HL2 at that frequency.
Be very interested to hear comparison when Grimeton powers up on
24th December on 17.2 kHz @ 07.30 UTC. Seems they will now be on
air after all having previously said they would not.
Let's see if HF+ proves its worth then!
I have seen suggestions that increasing one capacitor (or
whatever) can improve the LF and VLF performance, but I don't
recall where, or whether this recommended! Perhaps ask here?