Re: zetagi b300 I'm fairly sure it is not a wideband amp, and will only work well around 11 metres, although I'd expect it to work from at least 25-ish up to 30.
Not sure though, so best wait for a definite reply.
Re: zetagi b300 like andy said i think its 25-30mhz i have one in the mobile, never had it indorrs to put on the meter to se where it works from but i'm sure zetagi advertise it from 26-30
Re: zetagi b300 Doesn't like 80? I'm surprised you got it feeding on 40! What did the spectrum image look like? I can't imagine what the LP filter was doing, having kittens I should'nt wonder. Well it survived so that answered your question. John193