thewisepranker wrote:

Analyser wrote:That wire link under the NE5532, you could just move it to the right of the board past the diodes. Bit weird to have it under the chip.

The NE5532 could be in a socket (or "chip holder"), in which case it wouldn't be unreasonable.

Albert H wrote:A fairly quick and easy way to make a frequency-adjustable aerial is to make (say) a ⅝-wave vertical, with groundplanes that are (roughly) ¼-wave long at 88 MHz. The radiating element needs to be made out of two pipes, with one that fits inside the other. The outer pipe needs to be ⅝-wave at 108MHz, and then you progressively extend the radiator as you go down the band. You'll need a simple C - L matching circuit at the base of the aerial to get a good match to 50Ω, and an SWR bridge to confirm the calibration of the aerial.

The other - possibly easier - option is to make a set of the cheap Slim-Jim that are described in
http://radio.xtreamlab.net/omni-aerial.html. If you make them centred on 88, 91, 94, 97, 100, 103, 106MHz, you'll get a reasonable match at any frequency on the band, since the wire Slim Jim is close to 3MHz wide if you use fat wire. I made mine out of cut-apart 10mm Twin-and-Earth cable, keeping the uninsulated earth for use in coils in PAs and aerial matchers.